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      contextRef="FY2024_C000077650Member"
      id="t_3_5c3b1660_f4da_3b66_f5b7_501fc1d26b3a">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      id="t_4_c0c7226a_98c6_d82c_2632_868d55b651a8">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class A Shares/JDBAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

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      id="t_24_2bff42a3_0124_aaf2_2c0e_a99645c19c26">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class A Shares returned 25.96%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277982.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class A Shares/JDBAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class A Shares/JDBAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.0874</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000077650Member"
      id="t_15_28b42947_0295_738a_bb27_47ff88ad5369">Janus Henderson Balanced Fund (Class A Shares/JDBAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077650Member"
      decimals="4"
      id="h_6_290de440_9735_4974_847d_0a8eb9ad092d"
      unitRef="pure">0.1870</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077650Member"
      decimals="4"
      id="h_7_d36836c0_3a22_4b2a_b899_3203b174b6f2"
      unitRef="pure">0.0790</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077650Member"
      decimals="4"
      id="h_8_789913e2_cc43_4860_8cd7_8974a413ec67"
      unitRef="pure">0.0809</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_16_074d1142_f95b_abf0_f17f_30fde903fec6">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_9_c2c224bf_b7e8_4e0e_a10f_9234e5f9646c"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_10_99850889_950c_4be7_b5d2_9c6ffd3771e9"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_11_0ee3e6e0_431d_48f3_828b_ba27f891d011"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      id="t_17_cecc7ad1_30cf_1a2b_23d2_fb67100dd4ab">Bloomberg U.S. Aggregate Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_12_d1819bbe_d56d_4e17_8b8f_8435c945f7ca"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_13_c9f4f18a_612e_4c48_9e40_49ea67b84e5a"
      unitRef="pure">0.0033</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_14_86b73230_1010_4cdf_972f_bb842ac087b7"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_BalancedIndexMember"
      id="t_18_7ce6829a_4f12_5625_d0cc_8fd07362fa0f">Balanced Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BalancedIndexMember"
      decimals="4"
      id="h_15_b469a417_7945_4b26_b3b8_73e1a2fc9f33"
      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BalancedIndexMember"
      decimals="4"
      id="h_16_78d367cd_4cfd_42f1_a0d2_7640ec573f57"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BalancedIndexMember"
      decimals="4"
      id="h_17_08800f57_9ba5_4287_b1f0_03de4a7bde2d"
      unitRef="pure">0.0834</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077650Member"
      id="t_9_d246ec1f_21f8_9154_79d6_2e62d9abd0e9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077650Member"
      id="t_10_0d518910_7b15_0768_811c_56f6cb2d709a">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077650Member"
      id="t_11_69f74c9d_b6f9_fa3f_6eab_b19e5c1aaa42">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077650Member"
      id="t_12_829628ca_a3dc_88aa_2660_749bce713d42">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077650Member"
      decimals="INF"
      id="h_18_64f573ae_668d_4756_b305_e6f58b3d31f4"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077650Member"
      decimals="INF"
      id="h_19_a412f17c_b382_4270_82ae_f9ee1ef01903"
      unitRef="Holding">769</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077650Member"
      decimals="INF"
      id="h_20_ea340bbd_c447_46c1_bfb1_578434600eb0"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077650Member"
      decimals="4"
      id="h_21_18ffa627_25f6_4d72_ab33_8a34033b358d"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077650Member"
      id="t_13_56690969_342d_1b3a_ee46_43338ee7a4b9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277992.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077650Member"
      id="t_23_09ec5571_a170_bc6c_00fb_8cc5a609212a">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_24_51a11c8f_67f6_411a_9b07_a8276b3c2ca1"
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      id="h_26_4e26a757_724c_4b87_bf3b_7a7dc4fc3473"
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      id="h_28_59ba61ff_5778_497a_ac8c_09b74e42d387"
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      contextRef="TI20240930_C000077650Member_MortgageBackedSecuritiesMember"
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      id="h_30_2051666c_b48c_4a4c_830d_caf429c69231"
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      id="h_31_fef2de56_1ec1_48ed_bd6f_d097ada1dbc2"
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      decimals="4"
      id="h_32_34b3e923_c7a1_4619_825b_1df994058c2f"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077650Member_BankLoansAndMezzanineLoansMember"
      decimals="4"
      id="h_33_7348923c_a967_4667_af88_9ee79a280922"
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      contextRef="FY2024_C000077651Member"
      id="t_1_f25733d9_aebf_247f_67f2_a2cfc91137a2">Janus Henderson Balanced Fund</oef:FundName>
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      id="t_2_bc557692_7cfc_0186_d56d_3353c36e767a">Class C Shares</oef:ClassName>
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      contextRef="FY2024_C000077651Member"
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      contextRef="FY2024_C000077651Member"
      id="t_4_7580a72a_2381_d0ba_d472_c81791c6db24">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
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      id="t_5_bb11fd8a_ab31_740c_4833_8dd2626080eb">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000077651Member"
      id="t_6_0767c6ea_12ab_ac5c_7982_1f493c6ff63d">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
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    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077651Member"
      id="t_8_0cb99e72_932c_6eb1_4ac2_63815ea7e068">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class C Shares/JABCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;182&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077651Member"
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      id="h_35_846dc75e_1f14_4e8b_8ac0_836c10aea5c8"
      unitRef="USD">182</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_36_722955ba_8f99_4b5d_996d_a94201faa2e5"
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_25_b42393e1_0ed1_f67a_a818_040a13738c03">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class C Shares returned 25.03%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278021.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_23_1f1a1ca9_1f11_fa90_3e5b_9ec62b73d70a">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class C Shares/JABCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class C Shares/JABCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.03&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_42_9232c908_8ec8_44c4_898e_c5c3394cc72f"
      unitRef="pure">0.0798</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_18_f38570eb_49fd_3d99_cb1c_ce959ab04921">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_43_f4c391fd_6e14_47e3_a1ad_a09578a3c04b"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_44_9938a907_b6c7_49ee_85aa_c640ece7aba7"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_45_76a9fff0_9f55_4315_b0a5_c5b2ce819954"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      id="t_19_ef0f5098_c3ae_b565_8fc0_405aa7037d11">Bloomberg U.S. Aggregate Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_46_723748bd_3280_43a1_ae77_c2aa9de44f5f"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_47_ea119a0f_5f5d_4b90_907f_26b3c689ba7f"
      unitRef="pure">0.0033</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_48_871d7b7a_2bcd_4737_a4cc_d83401d1fd03"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_BalancedIndexMember"
      id="t_20_71acc78f_3516_e284_97f2_e2bc43c69e96">Balanced Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BalancedIndexMember"
      decimals="4"
      id="h_49_b0d742f9_402d_4bec_86bd_745812f7a530"
      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BalancedIndexMember"
      decimals="4"
      id="h_50_87ea5c5e_b884_48dc_9851_d6e378401232"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BalancedIndexMember"
      decimals="4"
      id="h_51_95511df7_1dc6_41e8_a98b_b2b5a4e85b0e"
      unitRef="pure">0.0834</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077651Member"
      id="t_11_f488237d_9f72_ddb8_d83b_39c06fce9e07">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_12_c938367b_b40d_2739_370d_f5385540cea3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_13_a3110c19_2fdc_a40d_2075_488724bcb290">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_14_a467e07d_7b49_ac64_5f6f_26f35f3ed349">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077651Member"
      decimals="INF"
      id="h_52_7e96d60d_874f_46ef_bcb9_ac914016faaf"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077651Member"
      decimals="INF"
      id="h_53_fc8aac27_fc55_4ead_9e6d_1aab6739d711"
      unitRef="Holding">769</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077651Member"
      decimals="INF"
      id="h_54_16fc384f_6625_4d25_853a_6f6fd38a0493"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077651Member"
      decimals="4"
      id="h_55_6089165b_13ef_474a_9fe9_5668b3738606"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_15_0433ca70_c297_2b1d_ba0b_c57cd377e88e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278031.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077651Member"
      id="t_24_2e79af66_e8c2_b04a_2612_8158302a77e6">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077651Member_MicrosoftCorpMember"
      decimals="4"
      id="h_56_940323bc_1a41_4574_8070_74b24d6feed6"
      unitRef="pure">0.058</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077651Member_NVIDIACorpMember"
      decimals="4"
      id="h_57_0ef6ab05_5e64_402c_baed_6fb36127e3fc"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077651Member_AppleIncMember"
      decimals="4"
      id="h_58_b50b2067_9d1a_4fd6_9269_6150b7f40ff5"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077651Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_59_774c7822_c003_40d7_a12f_097748c1a4d3"
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      contextRef="FY2024_C000083512Member"
      id="t_1_fb289d18_c5c1_204b_e8df_b7adac22ab1b">Janus Henderson Balanced Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083512Member"
      id="t_2_ed142577_4dcb_7263_9e98_a867e3709430">Class D Shares</oef:ClassName>
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      contextRef="FY2024_C000083512Member"
      id="t_3_b10fa1d2_4bca_6173_1189_5c9b03e25ab9">JANBX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083512Member"
      id="t_5_39c9d02e_0bd3_ffab_1307_07845ec9570b">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083512Member"
      id="t_4_978bda75_8b7b_01e0_9176_ce305550f16a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083512Member"
      id="t_6_3b348a24_834c_630f_9ee1_387631acce20">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083512Member"
      id="t_7_2714d08e_71e8_20e5_d578_d29c906e4e4b">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083512Member"
      id="t_8_a59859db_ba9e_ec62_2b30_848d0bce2e58">1-800-525-3713</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000083512Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class D Shares/JANBX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;78&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_69_56e2ac3b_fd80_4340_89e8_7b2704cb62f4"
      unitRef="USD">78</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      decimals="4"
      id="h_70_e8ea9a6f_e034_4c49_b0dc_74dc2bf83b07"
      unitRef="pure">0.0069</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083512Member"
      id="t_23_7a063560_58a7_0a49_b642_0faf8d0ae32c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class D Shares returned 26.17%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278060.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      contextRef="FY2024_C000083512Member"
      id="t_12_5fbbd756_eace_4154_67a1_7dbe48312849">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class D Shares/JANBX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      decimals="4"
      id="h_77_1d49ae3e_0858_4d85_9492_564735f37d77"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_BloombergUSAggregateBondIndexMember"
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      contextRef="FY2024_BalancedIndexMember"
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      id="h_80_31cd75af_9da2_4850_915a_8472b3177d10"
      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_BalancedIndexMember"
      decimals="4"
      id="h_81_d5241439_2d83_488d_b545_258d406456d8"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BalancedIndexMember"
      decimals="4"
      id="h_82_a9715dcd_d2d5_4de0_8416_fd1b8a157c4b"
      unitRef="pure">0.0834</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083512Member"
      id="t_13_bfe95966_8292_975f_8311_cc9f416715fe">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083512Member"
      id="t_14_82f3a710_65f5_9ab1_74fc_d967f047cfc6">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000083512Member"
      id="t_15_12e06f1a_2b27_cdee_d6e0_cfc912437b2e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083512Member"
      decimals="INF"
      id="h_83_54ae11ce_2907_41ab_97e6_2f26345c671a"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083512Member"
      decimals="INF"
      id="h_84_9bd1392d_3419_438f_8c3c_2eac9acb587c"
      unitRef="Holding">769</oef:HoldingsCount>
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      contextRef="FY2024_C000083512Member"
      decimals="INF"
      id="h_85_53eb3f07_129c_430c_bcf0_6bef84857056"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083512Member"
      decimals="4"
      id="h_86_ba62297e_e31f_401d_932e_d9746b7bd6d6"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083512Member"
      id="t_17_37fb8580_7237_f102_9c20_a75b4fd9d44a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278070.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083512Member"
      id="t_22_d1847ef9_712f_1b53_9410_83d79220035c">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      id="h_88_f2bb6387_5d2b_419d_b236_1cf8841ce22f"
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      id="h_89_2ab1aade_e335_40fc_8266_242612342095"
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      id="h_90_16c9fdf4_3734_45ca_9dd7_ab94eceb83b9"
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      contextRef="TI20240930_C000083512Member_AmazonComIncMember"
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      id="h_91_be001ca0_18c2_488e_aba7_9bb4e939db5d"
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      contextRef="TI20240930_C000083512Member_CommonStockMember"
      decimals="4"
      id="h_92_0935dbfb_5acd_4969_aa6a_c464d4c01d05"
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      contextRef="TI20240930_C000083512Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_93_b1286fe5_eba7_46ec_8a51_115379af5300"
      unitRef="pure">0.127</oef:PctOfNav>
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      contextRef="TI20240930_C000083512Member_AssetBackedCommercialMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_94_247e028e_5a7d_4c13_8c28_4857edc6fbb8"
      unitRef="pure">0.106</oef:PctOfNav>
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      contextRef="TI20240930_C000083512Member_MortgageBackedSecuritiesMember"
      decimals="4"
      id="h_95_72959aca_c1f7_409a_8729_b539be166d75"
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    <oef:PctOfNav
      contextRef="TI20240930_C000083512Member_UnitedStatesTreasuryNotesBondsMember"
      decimals="4"
      id="h_96_44641f1b_9272_4ba6_82a2_d5de273be213"
      unitRef="pure">0.045</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083512Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_97_1d0485b5_0072_4bc0_8748_29867b0251ec"
      unitRef="pure">0.029</oef:PctOfNav>
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      contextRef="TI20240930_C000083512Member_BankLoansAndMezzanineLoansMember"
      decimals="4"
      id="h_98_6a0ca639_ea68_4712_ab8b_e74c14b57828"
      unitRef="pure">0.006</oef:PctOfNav>
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      decimals="4"
      id="h_99_b3aef3a8_1beb_4254_9dbf_f5ed78ba8bfc"
      unitRef="pure">-0.020</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077652Member"
      id="t_1_2d08a78a_78a2_7f57_d04f_6caf5b5019c9">Janus Henderson Balanced Fund</oef:FundName>
    <oef:ClassName
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    <dei:TradingSymbol
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      contextRef="FY2024_C000077652Member"
      id="t_5_e2b2e3c2_b94c_d8b8_caa6_1c3df102d6e9">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077652Member"
      id="t_4_a782a973_1c58_7918_15e2_fb6eb485c4ee">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000077652Member"
      id="t_6_f9c88a2a_4b2c_cdaa_3ea6_cf9914f9cf2c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077652Member"
      id="t_7_1851900c_0e04_4ea5_9b19_ecce190fa89f">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077652Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class I Shares/JBALX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_100_580a3e63_9c8b_4aad_850c_cca9ee9a5052"
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    <oef:ExpenseRatioPct
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      id="h_101_d20f66cb_72f2_454e_91fc_d9a31f4b0b65"
      unitRef="pure">0.0066</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077652Member"
      id="t_25_19ec2cc9_c0f0_df9a_06ed_33b925f96aea">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class I Shares returned 26.23%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278099.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class I Shares/JBALX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2623</oef:AvgAnnlRtrPct>
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      id="h_103_1d246dbf_5221_45a5_ab4b_20b46c2fb217"
      unitRef="pure">0.0944</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      id="h_106_7c795da7_3f09_4e5d_ba0e_5325c44839c3"
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    <oef:AvgAnnlRtrPct
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      id="h_108_c9677ff9_a903_4f9e_af50_738602dc9d0d"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_109_63094633_773b_4977_b730_eaebabd95eb4"
      unitRef="pure">0.0033</oef:AvgAnnlRtrPct>
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      id="t_21_64d46203_b6ad_f9cb_bda0_c63911b24f10">Balanced Index</oef:LineGraphAndTableMeasureName>
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      decimals="4"
      id="h_111_acf77d07_8d22_4550_8aef_c24b7498b646"
      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BalancedIndexMember"
      decimals="4"
      id="h_112_f1915685_4acf_4869_884f_ed511d78355a"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_113_2bcc1b3a_6393_4431_abc3_ae9ae29da73f"
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077652Member"
      id="t_13_838e8380_7cee_92e1_4a14_d8c4e7df5e49">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077652Member"
      id="t_14_494c1ee2_13c2_3cad_f250_0954809743f7">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      id="t_15_eb5d185c_5b89_0638_4ec9_8b398ac64535">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077652Member"
      decimals="INF"
      id="h_114_eecdd908_eff9_453c_b049_e145db06391f"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077652Member"
      decimals="INF"
      id="h_115_6bd89c21_56e4_4648_adca_c58348e0327f"
      unitRef="Holding">769</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_116_0afff2e0_4d9f_42a3_a3aa_f719d03f6e71"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077652Member"
      decimals="4"
      id="h_117_a7786d98_df6b_440d_9655_54d9a67fedbe"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
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      id="t_17_a56e65ef_999a_cbdd_ba88_ee85e792e0d8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278109.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077652Member"
      id="t_16_3f1cc66c_d403_6fae_1d9c_dd8f35f1bebb">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      contextRef="TI20240930_C000077652Member_NVIDIACorpMember"
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      id="h_119_54ccd9bb_aabb_4ab9_bb8e_01ca4842a6c7"
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      contextRef="TI20240930_C000077652Member_AppleIncMember"
      decimals="4"
      id="h_120_a6c1bf13_d0b8_4c82_85a2_0d4a061e703b"
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      contextRef="TI20240930_C000077652Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_121_8330f055_e6c4_4ddb_a4f8_a39d4f1a7f25"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_AmazonComIncMember"
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      id="h_122_feb86bc2_f7e6_42eb_9cb1_9867829a80cc"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_CommonStockMember"
      decimals="4"
      id="h_123_25c73bfa_2680_4501_98a9_4f41ec0663e8"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_124_e77b9089_8af4_4a12_8c90_99eebf95381c"
      unitRef="pure">0.127</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_AssetBackedCommercialMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_125_31e57126_4858_4445_bb6e_3e1d70ab6969"
      unitRef="pure">0.106</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_MortgageBackedSecuritiesMember"
      decimals="4"
      id="h_126_b803f368_e419_4264_a1b2_8f84d969bbc1"
      unitRef="pure">0.088</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_UnitedStatesTreasuryNotesBondsMember"
      decimals="4"
      id="h_127_99872b52_50be_479b_b132_642c66d54be7"
      unitRef="pure">0.045</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_128_fd79de19_4e64_458d_ada3_2b4473a0f975"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077652Member_BankLoansAndMezzanineLoansMember"
      decimals="4"
      id="h_129_f0ac183f_10df_42b0_b25b_35a8fb558ffe"
      unitRef="pure">0.006</oef:PctOfNav>
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      contextRef="TI20240930_C000077652Member_OtherInvestmentsMember"
      decimals="4"
      id="h_130_ea2de59d_b3f5_469d_b678_45fe1f483513"
      unitRef="pure">-0.020</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000114869Member"
      id="t_1_6bf17aac_024f_c690_bb2d_625da9405066">Janus Henderson Balanced Fund</oef:FundName>
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      id="t_2_a18777ca_9be9_71e9_920f_452c7113b743">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114869Member"
      id="t_3_8d26ef39_6775_541c_4263_d080d8b36656">JABNX</dei:TradingSymbol>
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      contextRef="FY2024_C000114869Member"
      id="t_5_f8508a79_8ad4_7aaf_5790_7e6313ac435f">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114869Member"
      id="t_4_5c6eb93d_db00_654a_7be4_0d2a03640107">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114869Member"
      id="t_6_39846819_3517_d71c_7a66_2eefaf99f7ae">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114869Member"
      id="t_7_156a807a_14be_4311_4d9a_bdd4485d6359">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114869Member"
      id="t_8_94e773e5_7912_b95b_94ff_dc85ee88339d">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114869Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class N Shares/JABNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;65&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="t_24_5044e123_69a6_2a30_02f8_dab634fc3ccd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class N Shares returned 26.32%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278138.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class N Shares/JABNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.53&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2632</oef:AvgAnnlRtrPct>
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      id="h_134_3535cc55_b3d7_4e2e_956d_ab15c5e6edef"
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      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
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      id="h_139_d874326c_ea5b_4851_ad41_595e67dda212"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="t_22_c0bab604_fa0b_41b6_6372_a9352b126d35">Balanced Index</oef:LineGraphAndTableMeasureName>
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      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_143_bdab9b27_fb29_42d5_9536_54e68918c826"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2024_C000114869Member"
      id="t_12_15099590_ebe2_02e8_8fd4_4a789b4cdee9">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000114869Member"
      id="t_13_b3413174_ef4b_dd77_a2e5_fdb2b99481a8">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
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      id="h_145_ec4f7a57_e99b_4e7c_ba27_ea0864ac8801"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_146_0c60c2f2_6709_4809_99de_c47e80bb0761"
      unitRef="Holding">769</oef:HoldingsCount>
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      id="h_147_16e7e131_18dd_468a_bd2a_c61cdd61c2bd"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
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      id="h_148_1aa47f5e_933b_47b2_8d4f_3252ec6010ea"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
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      id="t_18_34d2b7e8_ddfb_b715_32f2_a1ab8f5f81d1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278148.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114869Member"
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

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    <oef:PctOfNav
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      id="h_150_ea4c1c1c_e23b_4288_9624_57d32d52658f"
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      contextRef="TI20240930_C000114869Member_AppleIncMember"
      decimals="4"
      id="h_151_bb8d5a91_996e_4040_a154_cbd9359dce3c"
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      contextRef="TI20240930_C000114869Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_152_040c69b7_24fc_4390_85bd_01b4908f52a4"
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    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_AmazonComIncMember"
      decimals="4"
      id="h_153_81b55293_4636_4f9c_8bdf_0e6cc1902fad"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_CommonStockMember"
      decimals="4"
      id="h_154_1143c1a6_b8bc_4394_ab4a_a755c7edb3fc"
      unitRef="pure">0.619</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_155_db765477_0b35_4552_8630_c227d23423a5"
      unitRef="pure">0.127</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_AssetBackedCommercialMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_156_e90fd680_71c9_4453_93f2_76b19e82f786"
      unitRef="pure">0.106</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_MortgageBackedSecuritiesMember"
      decimals="4"
      id="h_157_41a6af44_28c9_4d1c_affa_bdd235e0c234"
      unitRef="pure">0.088</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_UnitedStatesTreasuryNotesBondsMember"
      decimals="4"
      id="h_158_365e0c21_6c2c_4602_ae51_badba2be90ca"
      unitRef="pure">0.045</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_159_374f24e2_5e3f_4e72_829e_34411164d012"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_BankLoansAndMezzanineLoansMember"
      decimals="4"
      id="h_160_eb769695_c47c_4bdc_b414_b59b15dd4a47"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114869Member_OtherInvestmentsMember"
      decimals="4"
      id="h_161_5a433494_3d05_4716_a1eb_99ee16b7f708"
      unitRef="pure">-0.020</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077653Member"
      id="t_1_ee15cecc_0d58_cf38_8bc3_20758e724b7c">Janus Henderson Balanced Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077653Member"
      id="t_2_c1407118_14b3_bccf_4a5a_48efd6589fa6">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077653Member"
      id="t_3_0d2368eb_527b_08b5_ff67_70da8036081c">JDBRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_5_fc5a7fae_799a_f4ad_dc4e_04cc31e177a1">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077653Member"
      id="t_4_da2b52f7_88c2_4232_f6be_487915a5150a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_6_ed7b1820_d882_dafe_9152_472a76823779">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077653Member"
      id="t_7_3ec59b96_6419_e04a_26dc_4261627d8494">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077653Member"
      id="t_8_185ad2d6_1ac3_ae44_421a_14e2f1a659e3">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077653Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class R Shares/JDBRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;148&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077653Member"
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      id="h_162_13e9077d_b8a0_406f_bc6a_b6635543ce7a"
      unitRef="USD">148</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077653Member"
      decimals="4"
      id="h_163_bb135687_bb61_494c_9dc4_ccd0bc233d8a"
      unitRef="pure">0.0131</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_23_08d26cb4_3f64_0e89_97ae_1e8cce5c5f06">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class R Shares returned 25.43%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278177.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_22_6711c9ed_01e1_938b_9b0e_968857c38274">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class R Shares/JDBRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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      id="t_18_439418ff_9a0d_ed75_a299_b82abc736669">Janus Henderson Balanced Fund (Class R Shares/JDBRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077653Member"
      decimals="4"
      id="h_164_6ad6c1e1_5a49_4fa6_835f_22a51f0d86c2"
      unitRef="pure">0.2543</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077653Member"
      decimals="4"
      id="h_165_07a89fc0_9588_4756_85d1_9b3f6e02d84d"
      unitRef="pure">0.0872</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077653Member"
      decimals="4"
      id="h_166_96208063_605b_4c3b_a531_b88f314d4196"
      unitRef="pure">0.0830</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_19_c75c43cc_0850_3875_fc54_009c9c25bf61">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_167_ff3e1aec_2888_455b_a329_73d6a255b665"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_168_59550e39_9e1d_4f76_bdf9_c6750627fb49"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_169_55e10e11_3e54_40ff_9fdb_48346625c2f7"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      id="t_20_04df056c_11c6_59df_42b2_8b6e02a57e92">Bloomberg U.S. Aggregate Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_170_f12aced5_34e5_4e18_aa69_30f9338036a4"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_171_2f2260a1_1b98_418d_86fd_df6e273ae9fb"
      unitRef="pure">0.0033</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_172_9cab8283_6f61_4d07_a86b_458ba4ad1004"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_BalancedIndexMember"
      id="t_21_89813d80_f85e_e7c5_2a0f_ca42910d00eb">Balanced Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BalancedIndexMember"
      decimals="4"
      id="h_173_d3eedfcc_0c48_4032_868d_653675732805"
      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BalancedIndexMember"
      decimals="4"
      id="h_174_7c6220ca_0df8_49aa_a5ed_db8c3fc17196"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BalancedIndexMember"
      decimals="4"
      id="h_175_c033a61c_ee43_4871_beff_35d1ec21126d"
      unitRef="pure">0.0834</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077653Member"
      id="t_12_5d65313b_731f_e5c2_1662_7e6ddf9642dd">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_13_900b6ea6_0021_4798_c1cc_929a551d6358">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_14_df30b09f_b4e4_8c89_3db0_a341c6885daa">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_15_8e468d25_43e5_41e5_2eb5_f9fb3773ea5f">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077653Member"
      decimals="INF"
      id="h_176_11d1b81e_bfc4_4b7d_80e1_c2828a73dc09"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077653Member"
      decimals="INF"
      id="h_177_5803e481_7864_45ac_b986_1c31c3c02ac4"
      unitRef="Holding">769</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077653Member"
      decimals="INF"
      id="h_178_4027e6c4_967f_4ea4_9f27_d6a1998e2e58"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077653Member"
      decimals="4"
      id="h_179_782e3bf3_320c_4d9c_9703_d7a176c407cc"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077653Member"
      id="t_17_23377cbb_8f7e_9c2e_67b7_d8e15f493927">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278187.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      contextRef="TI20240930_C000077653Member_NVIDIACorpMember"
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      id="h_181_5280f5b4_8ec6_4cd8_8576_3680a2c42886"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_AppleIncMember"
      decimals="4"
      id="h_182_a3315c28_457f_4447_b3cb_0ee63cf61f5d"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_183_4e4efa6c_fe80_4b58_ba6e_87418d5a15ee"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_AmazonComIncMember"
      decimals="4"
      id="h_184_ed19b391_93ad_4433_bae3_6d245ab61a70"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_CommonStockMember"
      decimals="4"
      id="h_185_d4b05855_767d_4d0d_85b3_049b0fa89a85"
      unitRef="pure">0.619</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_186_c1a38685_df64_4ebe_b4da_c1c00a59935c"
      unitRef="pure">0.127</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_AssetBackedCommercialMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_187_557e6834_bf20_4118_bef9_e22c190ba72a"
      unitRef="pure">0.106</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_MortgageBackedSecuritiesMember"
      decimals="4"
      id="h_188_59f3ce1c_3a4c_402c_83cb_d113add895ce"
      unitRef="pure">0.088</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_UnitedStatesTreasuryNotesBondsMember"
      decimals="4"
      id="h_189_1ce7d968_cb76_429a_bfed_98209a43d7e7"
      unitRef="pure">0.045</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_190_ad48180a_41fa_4c07_974b_95a30ab79bb8"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_BankLoansAndMezzanineLoansMember"
      decimals="4"
      id="h_191_24bc57f2_4146_4d6a_99eb_9942f15a2c9e"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077653Member_OtherInvestmentsMember"
      decimals="4"
      id="h_192_35d9cef6_27df_4511_ba2f_ead9c65ad2ac"
      unitRef="pure">-0.020</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077654Member"
      id="t_1_45ffa9e5_e36f_1a39_4f10_dea582f7be29">Janus Henderson Balanced Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077654Member"
      id="t_2_5669a3bb_ecd3_9c4c_12d2_521f37c3d9d3">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077654Member"
      id="t_3_d6f9b053_d34f_a115_3bbe_855ea19c9c7f">JABRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_5_d806627c_0661_6e84_aca4_e21c8b076d39">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077654Member"
      id="t_4_9d72fb46_8472_7447_8589_147904ca806d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_8_c11543fa_2368_423e_c426_7a859ef0f441">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077654Member"
      id="t_6_f631a808_d128_6bf9_472d_7c90fb1c168d">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077654Member"
      id="t_7_dd2dc972_1d14_d7dc_aa57_0e71f42fcb8d">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077654Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class S Shares/JABRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;120&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077654Member"
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      id="h_193_80290963_e0d2_4a4a_82a7_0e0c024ea40b"
      unitRef="USD">120</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077654Member"
      decimals="4"
      id="h_194_f89173c4_9a5e_423b_982e_1c7f4ee5d151"
      unitRef="pure">0.0106</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_24_865e16d9_715a_6a7e_f9b1_c8560805698a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class S Shares returned 25.73%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      id="t_23_cdc780ca_48f0_f8e6_045a_77114540bf24">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278216.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_11_dcb22f6c_c5e2_b2e0_e1eb_565035f349cf">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class S Shares/JABRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      contextRef="FY2024_C000077654Member"
      id="t_18_bf32ea52_f4e1_f1cd_ebc4_4068a11dacb9">Janus Henderson Balanced Fund (Class S Shares/JABRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_195_8ab5805d_0503_469d_89ca_faeb5203a0f4"
      unitRef="pure">0.2573</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_196_e9833d5d_5352_4195_b406_923733ee8a77"
      unitRef="pure">0.0899</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_197_c84437cf_60ab_4313_8a49_2002a439a673"
      unitRef="pure">0.0857</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_19_bbabefa2_0fb0_04c0_ce3e_398198a1b88a">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_198_a4cb7c38_4c21_4a5c_8cd5_d58ccb0f094d"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_199_c966d8d9_148f_4725_b4fc_2e38a62d13dd"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_200_3a7860c5_cfb7_453f_a447_e8a137e89bb2"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      id="t_20_e0789a2b_894b_5628_82fe_ce943f8ebbbc">Bloomberg U.S. Aggregate Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_201_95938b0a_8515_4970_b019_647488628feb"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_202_6ff1821b_eb18_47f6_8f54_29a170605c68"
      unitRef="pure">0.0033</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSAggregateBondIndexMember"
      decimals="4"
      id="h_203_0fa4af14_ff8d_429f_b1b3_a871f3280e10"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_BalancedIndexMember"
      id="t_21_4c55873b_6dd8_497f_e0d6_76c82a99c0a2">Balanced Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BalancedIndexMember"
      decimals="4"
      id="h_204_802e4dd5_3f19_4026_96af_92253f85bd42"
      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BalancedIndexMember"
      decimals="4"
      id="h_205_32aad0b5_9ca5_4835_bb6e_945f20418311"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BalancedIndexMember"
      decimals="4"
      id="h_206_41de61cc_7bf2_4db4_a98e_861844dc1e4e"
      unitRef="pure">0.0834</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077654Member"
      id="t_12_23aba48c_b258_c511_85c7_5afcbeb05292">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_13_ec260996_0943_eb28_435c_c0d04339cc64">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_14_f8e2f37f_1e94_91d3_068b_ff548db6ebdd">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_15_d89922e2_b926_9222_0d79_c80054a7be4b">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077654Member"
      decimals="INF"
      id="h_207_816442fc_3852_4cfb_99b2_64f4dce5b549"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077654Member"
      decimals="INF"
      id="h_208_3fa76989_0eaf_4fd3_b0ed_7d5130f1a31b"
      unitRef="Holding">769</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077654Member"
      decimals="INF"
      id="h_209_822f11be_b939_46d2_9cd9_e4906cebf06d"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077654Member"
      decimals="4"
      id="h_210_9a1ec75b_e68c_43c7_a681_31fa2dea9d61"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_16_3c68edf2_7cca_d0f9_fc6c_a396d4a9c0e7">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;
&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278226.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077654Member"
      id="t_17_19cc0ea8_28de_7e3b_1829_7913f97ad632">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
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      id="t_1_3cbbe2d2_e6ca_9455_479a_eee7453e9f7f">Janus Henderson Balanced Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_e4634bc0_7011_912b_fa80_7dab37970392">Class T Shares</oef:ClassName>
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      id="t_3_265f6ccf_0643_1329_12e5_9fcc839df1cf">JABAX</dei:TradingSymbol>
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      contextRef="FY2024_C000028918Member"
      id="t_5_c18c6af1_2878_8cce_747e_8f7f2be1ee9a">This annual shareholder report contains important information about the Janus Henderson Balanced Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028918Member"
      id="t_4_f16c0346_7765_049d_7e08_fc5026b056d0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_8_dca81e28_c685_d324_9987_3ea24e05ca9c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
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      id="t_7_3d0ecb9f_3923_7549_3ee7_9fc2936662b3">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund&lt;br/&gt;(Class T Shares/JABAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;90&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">90</oef:ExpensesPaidAmt>
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      id="h_225_7c02a936_3d79_425b_a1f7_a914aaaf281c"
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_23_0f606998_8ad3_46ad_5814_dd80f6c7a56a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Balanced Fund Class T Shares returned 26.05%. Its broad-based benchmarks, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, and the Bloomberg U.S. Aggregate Bond Index returned 36.35% and 11.57%, respectively. Its performance benchmark, the Balanced Index, returned 25.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;The equity allocation performed in line with the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, with NVIDIA being a top contributor to relative results. The graphics chip company reported strong earnings supported by robust demand for graphics processor units used in generative artificial intelligence (AI). American Express, another contributor, reported strong profits growth that reflected higher customer balances and healthy spending by affluent cardmembers. The fixed income allocation outperformed the Bloomberg U.S. Aggregate Bond Index, largely driven by asset allocation decisions. Overweight allocations to both securitized and corporate credit proved beneficial.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Within equities, footwear company Nike detracted relative to the S&amp;amp;P 500 Index as the company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending. Consulting firm Accenture also detracted when business slowed due to a shift in IT spending toward AI and away from legacy software projects. In the fixed income allocation, security selection within agency mortgage-backed securities hindered results relative to the Bloomberg U.S. Aggregate Bond Index.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278255.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_10_e6c72d73_ce21_810d_1a34_66e1af4c3c3b">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Balanced Fund (Class T Shares/JABAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Balanced Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
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      id="h_232_e69cf781_b8db_4a96_a215_845745010216"
      unitRef="pure">0.1157</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2505</oef:AvgAnnlRtrPct>
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      id="h_236_a41cf2e3_45e3_4f76_b304_df07510edf12"
      unitRef="pure">0.0906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_237_c885fdc9_ce1a_4c9c_96e9_cb72ad09c995"
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    <oef:PerformancePastDoesNotIndicateFuture
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_12_b819ff8c_0038_8ffb_fa14_d9bbcfe915df">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_13_31832406_da87_9b12_d70e_c2b079aed9e5">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_14_aeff9a64_7719_04f7_0e03_3f13fbe12b70">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;26,509M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;769&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;135.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028918Member"
      decimals="INF"
      id="h_238_8984b7e6_3be7_45f3_b6b0_79764109ecb7"
      unitRef="USD">26509000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028918Member"
      decimals="INF"
      id="h_239_ef591e07_548d_4ef5_89c5_2bcb3918b255"
      unitRef="Holding">769</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028918Member"
      decimals="INF"
      id="h_240_77961bfe_9863_4d0b_97a7_ff9ea5e1cd44"
      unitRef="USD">135400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028918Member"
      decimals="4"
      id="h_241_91ceced2_9b53_433a_aa0c_186abc5b6a7e"
      unitRef="pure">0.76</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_15_9841020b_8f34_fa1e_3c0e_fc7addea09e3">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;61.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;12.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;10.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;8.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;United States Treasury Notes/Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Bank Loans and Mezzanine Loans&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(2.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278265.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028918Member"
      id="t_16_a5ece39d_bf3d_89e1_93a3_18abf3dc3af0">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_MicrosoftCorpMember"
      decimals="4"
      id="h_242_349b8923_2db5_4e43_9156_97d02debb3c9"
      unitRef="pure">0.058</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_NVIDIACorpMember"
      decimals="4"
      id="h_243_dcea0b8a_c1ee_4d57_8910_0476f757bd86"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_AppleIncMember"
      decimals="4"
      id="h_244_91b942a6_b40a_4da8_955b_a6e72b524a8a"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_245_b3f3d65c_6542_414b_af9f_37af659771b9"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_AmazonComIncMember"
      decimals="4"
      id="h_246_ba714fa7_4216_43e0_8c3c_cc902fb8a205"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_CommonStockMember"
      decimals="4"
      id="h_247_e88af024_9262_4827_b678_25e35abb7195"
      unitRef="pure">0.619</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_248_c888139a_f94d_416f_a6d9_52743077a6dc"
      unitRef="pure">0.127</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_AssetBackedCommercialMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_249_fb70d4b7_9781_4b9a_ad35_05cdb937113a"
      unitRef="pure">0.106</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_MortgageBackedSecuritiesMember"
      decimals="4"
      id="h_250_5418f848_c430_43f6_94af_c2f522522670"
      unitRef="pure">0.088</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_UnitedStatesTreasuryNotesBondsMember"
      decimals="4"
      id="h_251_7cf03f18_1551_4820_b9ca_4ae9958bd589"
      unitRef="pure">0.045</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_252_75f7f49a_a427_46f7_9825_b93cb39b41ed"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_BankLoansAndMezzanineLoansMember"
      decimals="4"
      id="h_253_17d8132c_b211_4b92_8ee1_0fdcffe755a3"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028918Member_OtherInvestmentsMember"
      decimals="4"
      id="h_254_9c15c691_d209_4272_8637_9aefe76fccf6"
      unitRef="pure">-0.020</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077683Member"
      id="t_1_d6e73ddc_365c_c78f_357d_73fe988a6f48">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077683Member"
      id="t_2_6abb917e_c199_ff9b_1559_527a1852519a">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077683Member"
      id="t_3_bea60af0_a4e9_dd54_ff1f_80be393ffb86">JCNAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_5_81d21f7b_318c_c84e_c240_9dc463c1e1a4">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077683Member"
      id="t_4_d8735344_04d0_920f_12a5_a1c2a1b68670">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_8_ef45d6bf_a40c_0ab1_50eb_97bd3a5a1e4c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077683Member"
      id="t_6_aab75898_8d52_10d8_4b82_d3097b284f7a">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077683Member"
      id="t_7_7e2cdec7_b87c_9781_2e48_61f6b9438992">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_10_3728ee57_7d49_913e_cab4_a40a03d8854a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class A Shares/JCNAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;104&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077683Member"
      decimals="INF"
      id="h_255_c4583f89_2d75_46cc_9fb4_3143dc1fe4dd"
      unitRef="USD">104</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077683Member"
      decimals="4"
      id="h_256_476eac22_44a0_4328_9c7a_1daa4fa710a1"
      unitRef="pure">0.0089</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_26_23bfddb0_8e37_7ff5_7a30_35a3a6644b60">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class A Shares returned 33.40%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277358.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_12_93fb151e_5c0e_3bcb_4941_ffc4ca7ef988">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class A Shares/JCNAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class A Shares/JCNAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077683Member_WithoutSalesLoadMember"
      id="t_20_a9500e7b_ff62_546e_e6a3_f4e6f1624594">Janus Henderson Contrarian Fund (Class A Shares/JCNAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077683Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_257_ef66e9e2_896a_43f7_8fe3_d1a66d163c87"
      unitRef="pure">0.3340</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077683Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_258_3a9ef2b5_8881_4161_84d5_4d7a2b601f87"
      unitRef="pure">0.1382</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077683Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_259_9f51a338_af3a_40cb_ba76_d6b825ba762b"
      unitRef="pure">0.0950</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077683Member"
      id="t_21_638bdb81_3dfc_2a7c_7b3c_d4c173c8276d">Janus Henderson Contrarian Fund (Class A Shares/JCNAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077683Member"
      decimals="4"
      id="h_260_dc92c945_387d_458b_bc49_9add3b17e9f7"
      unitRef="pure">0.2572</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077683Member"
      decimals="4"
      id="h_261_f237a577_0577_431a_b6a0_42bdf362f0aa"
      unitRef="pure">0.1248</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077683Member"
      decimals="4"
      id="h_262_ecf59909_ad82_4cca_9890_ade08b20d6e8"
      unitRef="pure">0.0885</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_19_b685ff57_187d_6660_b4c0_e9d003fe6ce4">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_263_b70fbfb6_5ab4_4d97_a159_00023e7508a1"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_264_75624f26_00e3_4645_98f5_c9172c363f59"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_265_1d58aa2a_4983_40bb_b413_a16ecbdc455d"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077683Member"
      id="t_15_7a7ffe49_9c1e_e1e3_f8a0_8e4ed93486d7">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_16_46c75b58_b2f9_46d7_d821_d3c6c628c213">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_17_c472450c_f0fc_558b_4d2a_810215f3920e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_18_d957b1ba_0a49_b581_0dc2_997a04a78781">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077683Member"
      decimals="INF"
      id="h_266_f8347efd_a046_4ecc_9739_226c11a16ad2"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077683Member"
      decimals="INF"
      id="h_267_91c00ee3_16ab_4e05_93fe_f42e4b651eee"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077683Member"
      decimals="INF"
      id="h_268_a70e2370_b0d1_4a4c_b05e_68fabd4bb7a2"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077683Member"
      decimals="4"
      id="h_269_c65a1e45_0c1f_4696_81de_9bb088be668d"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_24_f19e259d_7af7_a0a2_77a2_0bd2ed6028ea">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277368.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077683Member"
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_270_18fb9d19_09f0_4c38_ac8d_f0981e189a5b"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_271_c691c31d_fa6d_4450_8c3d_084aa12766bb"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_OracleCorpMember"
      decimals="4"
      id="h_272_3c09be32_2915_4bbb_bba2_97209ea7a0cf"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_273_7b7755c3_b46b_4ea6_9ffc_304683fcc950"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_AmazonComIncMember"
      decimals="4"
      id="h_274_530c53d1_abf5_480e_9453_2c72823642cc"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_CommonStockMember"
      decimals="4"
      id="h_275_971314fd_bd36_46ab_a923_8f91b7817949"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_276_8f560b60_2ebe_475f_a1c4_787f0f77744a"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_277_4fb46f21_b111_4e19_b957_f63d59cb16f0"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_278_3ffe1959_4c9b_4e0d_b505_b8ae7d1038d0"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077683Member_OtherInvestmentsMember"
      decimals="4"
      id="h_279_9a0cb9ca_6785_4e73_8a4c_9cab3ad029c0"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_22_cf1a232d_8e98_5289_f652_3e7dad00c6d0">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077683Member"
      id="t_23_abe2c0e2_edf4_3dde_b865_24b95b40c34f">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077684Member"
      id="t_1_6db4c5a2_3145_668a_7210_57b57d62ed55">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077684Member"
      id="t_2_a0c1f2cd_b422_87b1_17aa_74fec57ad4df">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077684Member"
      id="t_3_1359fd89_ef1b_8f4e_c3b5_cc4df49bb02f">JCNCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_4_c4cc26d8_5c62_0997_ce1e_29931322c8e0">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077684Member"
      id="t_5_a08f6cb5_0d9d_1395_cbac_137944a3c764">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_6_9d9e6032_31e6_421d_f24d_61222e41e88d">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077684Member"
      id="t_7_0ebb50f5_9ddf_8ef6_ffb1_868d067adf31">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077684Member"
      id="t_8_572b6168_fae1_a606_26c1_8e8fe8af70af">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_9_b7f9932a_22ec_0531_40b1_9d1e616b6fd0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class C Shares/JCNCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;187&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077684Member"
      decimals="INF"
      id="h_280_33b336a4_0eff_405c_8ca3_ae32d97fbc36"
      unitRef="USD">187</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077684Member"
      decimals="4"
      id="h_281_211f7733_ef39_41c1_ae78_23f63057a180"
      unitRef="pure">0.0161</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_23_352570f8_4eb8_41e5_5cdc_5f89bea2f401">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class C Shares returned 32.41%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077684Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277397.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_14_5110371d_4774_644a_f2b2_9f180e0275bc">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class C Shares/JCNCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class C Shares/JCNCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.41&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      contextRef="FY2024_C000077684Member_WithoutSalesLoadMember"
      id="t_11_833fdac6_e587_5e09_ab1f_9a205573bad4">Janus Henderson Contrarian Fund (Class C Shares/JCNCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077684Member_WithoutSalesLoadMember"
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      id="h_282_2953bfbe_d93f_46ea_8de0_4b8c77014cc6"
      unitRef="pure">0.3241</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077684Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_283_e62dbe04_b661_4dfc_8ea4_861afe96203c"
      unitRef="pure">0.1303</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077684Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_284_23bde2c2_8fc6_4586_8cd6_9704c551f85e"
      unitRef="pure">0.0873</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077684Member"
      id="t_12_1b70a072_e507_c4f4_8865_6fffa1665be7">Janus Henderson Contrarian Fund (Class C Shares/JCNCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077684Member"
      decimals="4"
      id="h_285_97e36333_a5d6_4382_9099_6b2223cb774f"
      unitRef="pure">0.3141</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077684Member"
      decimals="4"
      id="h_286_9d2477d4_d292_487e_9dd1_e03014f7603f"
      unitRef="pure">0.1303</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077684Member"
      decimals="4"
      id="h_287_c61d1513_39e1_48b6_b4d1_95962ba4940a"
      unitRef="pure">0.0873</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_13_7bcc791d_a64f_977d_fb80_50e00fbcd16f">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_288_63fc1e8b_977c_422a_8093_480c55726141"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_289_f6efbfe6_b11b_4d18_b894_5492fbbb9813"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_290_8c589cfd_d9fc_4e0e_a48e_56790d227fca"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077684Member"
      id="t_15_fc0dd4fa_d831_89c9_50d2_931e451d205d">Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_16_1e395551_d7a1_3784_e472_949f35cfdbad">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_17_05bc610e_eb0b_8857_b429_ad2b20166c65">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_18_857add45_c00e_b924_03f7_e3ca8b5b7496">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077684Member"
      decimals="INF"
      id="h_291_c6de2f3e_5e2d_4695_b8a8_e9df6a7dcae3"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077684Member"
      decimals="INF"
      id="h_292_f124e119_9b4f_41b6_a3d3_56ffada3e7a2"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077684Member"
      decimals="INF"
      id="h_293_c774005e_c67d_4a3e_9c95_e642e531ae39"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077684Member"
      decimals="4"
      id="h_294_311f54e9_8064_462e_9f5e_ddde12f10b82"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_19_18971a42_1320_67a0_accc_9d330c03a2ef">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277407.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077684Member"
      id="t_20_27004547_e4e3_553d_7fed_9ce9aaf3882d">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_295_c2022f8e_04b8_490b_b8a0_55e91213250a"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_296_a227bb33_eb70_4b51_803a_d99aaf07c1eb"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_OracleCorpMember"
      decimals="4"
      id="h_297_ced28b97_c54f_4191_86a0_0b711af44dd0"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_298_b0f69506_056f_4c14_9efc_274cb12560ae"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_AmazonComIncMember"
      decimals="4"
      id="h_299_07897779_8743_4acc_b1d3_06fcbc9aedb7"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_CommonStockMember"
      decimals="4"
      id="h_300_ec4d0b7b_3eac_4f83_865e_6a3f831007bd"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_301_686df9cc_30a8_4594_9526_faab4fe08a06"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_302_359e1233_eef2_4fb7_a4fa_86a37037bfca"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_303_5c77296e_a37d_42e4_b08a_a17b10cc88d3"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077684Member_OtherInvestmentsMember"
      decimals="4"
      id="h_304_31108f65_58f6_4d6c_91c9_5a5e4aef7fcb"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000083521Member"
      id="t_1_c22a2e46_4f51_c935_c229_0fcb3ff5caff">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083521Member"
      id="t_2_9f433543_b715_0c02_2922_a063bd40e24f">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083521Member"
      id="t_3_01b1c1e7_7306_5afa_5f9c_48338901e93f">JACNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_4_deb80234_7ce7_f683_4614_82af87d9cb55">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083521Member"
      id="t_5_0254aa2d_3350_5fd8_9de7_560bf55cc7ff">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_6_13d03d1c_998a_d210_dadc_e0165d4576ad">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083521Member"
      id="t_7_32d7f8fe_11db_adbe_0272_b8e453055a62">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083521Member"
      id="t_8_f04c9f6a_e70b_3352_a353_564c691e944b">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_9_4e23df8d_caa8_e904_21f4_2383b6bacdeb">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_10_6f2d8425_07c7_f663_9343_144ba4555960">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class D Shares/JACNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083521Member"
      decimals="INF"
      id="h_305_1f9410d5_d4e9_4a08_ade4_1bd22ff7367a"
      unitRef="USD">75</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083521Member"
      decimals="4"
      id="h_306_890876f7_3077_4987_9bca_cab8d433056c"
      unitRef="pure">0.0064</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_24_0ce94176_7deb_d4aa_31c5_1f20232c160a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class D Shares returned 33.71%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_23_182de13a_adef_ab64_f9fc_d32f8dff3b16">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277436.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_11_1557f5a0_134d_4d25_4b84_91bd027d3cd9">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class D Shares/JACNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083521Member"
      id="t_12_4c47113f_4bf5_7845_5cd8_e31d8951c949">Janus Henderson Contrarian Fund (Class D Shares/JACNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083521Member"
      decimals="4"
      id="h_307_a8ccbd46_f2ae_44e1_b657_2e97b5859967"
      unitRef="pure">0.3371</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083521Member"
      decimals="4"
      id="h_308_0d5cbf2e_f3b0_487b_94f0_73e4d8616f64"
      unitRef="pure">0.1409</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000083521Member"
      decimals="4"
      id="h_309_c4bfbea4_a0a9_4529_a57b_65977942a127"
      unitRef="pure">0.0974</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_13_d338f0b6_7de7_146f_7f59_477da8955823">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_310_17cbcf5e_a022_4432_a819_55c2c1f073ba"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_311_9e692fd7_9e63_4386_b136_1df80e57c6a9"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_312_359408bd_1b5c_4928_8708_c93d7f6fc2f6"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083521Member"
      id="t_14_af7f56d7_105d_031b_a027_4261481e159d">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_15_bb553a2f_fd89_fe5d_1ad8_666575b72578">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_16_f6ef9e50_088a_f6e9_e56a_96b05e652452">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_17_e7867ea0_3979_06b1_dfa5_ee463bb2904b">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083521Member"
      decimals="INF"
      id="h_313_59303018_7556_4f2f_81d4_6cf6c7a7114b"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083521Member"
      decimals="INF"
      id="h_314_c004dc0d_40aa_4675_91b4_ba601739a58b"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083521Member"
      decimals="INF"
      id="h_315_96e1fa00_78c4_42ad_86f0_0571d2a83493"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083521Member"
      decimals="4"
      id="h_316_f257b507_447e_4480_9290_56223bd5ceb8"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_18_8980fe69_1278_6354_0690_7e20b4cdd3db">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277446.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_19_71f2f858_b5dd_81b6_564f_56f8be5ad99f">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_317_24c357d8_17a2_4342_ad34_c6ed2744d38f"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_318_b85a5e81_3698_4f05_ae06_166e9c48be3b"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_OracleCorpMember"
      decimals="4"
      id="h_319_f0efd937_f0ea_4847_9115_4c865f52c4bc"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_320_9e39416b_512e_4828_b56d_038b52c8fc57"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_AmazonComIncMember"
      decimals="4"
      id="h_321_4edd8f81_f149_4fdf_a078_b7e57661cc66"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_CommonStockMember"
      decimals="4"
      id="h_322_e72944dd_6685_4d09_959f_152be4beef92"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_323_913a6352_c001_4ae3_9864_3d3d03c89b6e"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_324_8eb32e4c_67eb_4a57_ae7c_3b65b7579e4f"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_325_85d8db0e_096e_4e96_a947_88e07444b344"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083521Member_OtherInvestmentsMember"
      decimals="4"
      id="h_326_9d90c7e6_1744_4069_9a9d_06ace3558118"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_20_dd0c23e5_1c84_94cf_d99e_f780e3e89ddd">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000083521Member"
      id="t_21_cbb64947_5c9d_4572_7880_2fe747860e03">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077685Member"
      id="t_1_62602ab4_8256_9b38_4963_b2bb3248318b">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077685Member"
      id="t_3_72e98fd4_614d_ce06_2a91_cce73c9a6da5">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077685Member"
      id="t_2_ae35b442_dd9d_daf3_5fa7_5df8483f45c5">JCONX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_4_dbe683df_2977_97f5_a5da_807558ab18c6">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077685Member"
      id="t_5_b36a55b9_5d80_3ec3_3bbf_61fbbe2ee6ab">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_6_2a12a193_72d2_5cb1_5170_7e1d229f9d17">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077685Member"
      id="t_7_a11d1b3e_7ba4_504d_f9bd_e64ddf677d24">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077685Member"
      id="t_8_62862c4e_ab0a_261a_3912_9ee137f62e2b">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_9_a9a86c33_1887_25fc_5f7a_6d1dd06f361a">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_10_0a09d439_f128_07b0_ebee_d133bb7c74ec">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class I Shares/JCONX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;72&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077685Member"
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      id="h_327_7d4274ef_992e_4413_af2c_adcaa5b590f4"
      unitRef="USD">72</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077685Member"
      decimals="4"
      id="h_328_13f1877a_963a_42f0_bed8_a057a56eb93c"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_26_2f99ea3d_85e4_5db0_b9de_bb73c50d7dce">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class I Shares returned 33.73%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277475.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_15_aa233e1b_aeeb_d5fa_2157_ca335da6130a">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class I Shares/JCONX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077685Member"
      id="t_13_af73ad61_149b_894f_3613_95c8688b7655">Janus Henderson Contrarian Fund (Class I Shares/JCONX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077685Member"
      decimals="4"
      id="h_329_a5e06f50_fe91_45d1_a159_42e97792d6dd"
      unitRef="pure">0.3373</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077685Member"
      decimals="4"
      id="h_330_131c8b02_0bb9_4013_b746_e97a3459c708"
      unitRef="pure">0.1413</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077685Member"
      decimals="4"
      id="h_331_1aeca1c5_5341_4e52_b101_f6b30f3d2513"
      unitRef="pure">0.0979</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_14_68f79952_6265_08c9_47b8_6d3cd600b19f">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_332_131dd4ce_2ace_4a7c_9c56_b4c044616e82"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_333_d9311163_cba4_47ca_8a5b_fab7c04a5a2f"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_334_5ca2bdde_1ddf_4a43_9b97_f8603c9fc88a"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077685Member"
      id="t_16_3bf259b6_3b30_fd48_d046_d4a8097cb9b1">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_17_f52342b4_3dd0_bd50_250a_e205a97203ba">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_18_27437b2d_3985_bd52_c954_996a705e5a59">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_19_263b51e6_4099_7c13_c455_3885d1956193">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077685Member"
      decimals="INF"
      id="h_335_94426258_7164_48fc_8205_dc83f884449e"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077685Member"
      decimals="INF"
      id="h_336_60da5000_9284_4cd4_a4e9_93a7c816fe83"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077685Member"
      decimals="INF"
      id="h_337_925f50d2_b511_410e_9122_94eb64bb7320"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077685Member"
      decimals="4"
      id="h_338_572fe815_92a0_4b8f_84fb_3badb45a6b2a"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_20_e5f1dd01_97aa_3767_9b8d_82448b3d0f88">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277485.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_21_471619d1_190c_3435_387e_347eb6dabd3c">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_339_ff314ae7_442e_4bf2_975a_f4027d1cd32f"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_340_a7eea291_6409_4a8a_af63_b911a1188653"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_OracleCorpMember"
      decimals="4"
      id="h_341_f195f2ee_3226_440f_b735_8477e75ee929"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_342_bcfaf673_04ff_4eda_b7db_5e2c07b9ad05"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_AmazonComIncMember"
      decimals="4"
      id="h_343_52a573c2_dd6e_49fd_a1a5_50dfb8b095a7"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_CommonStockMember"
      decimals="4"
      id="h_344_9ff6917d_3562_4191_aafb_22e7ace10512"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_345_167008c5_2a4b_4e15_a28b_ff84b0202714"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_346_f3e224e5_6993_46e6_a895_e3c4172efb2e"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_347_d9b25216_27d0_4397_9488_8b25a071485f"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077685Member_OtherInvestmentsMember"
      decimals="4"
      id="h_348_2e73d665_be64_4000_9c54_b4eb3beb98c1"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_25_0f713923_3f74_8403_9c51_f9ad256c4243">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;
</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077685Member"
      id="t_24_75769c21_cdbb_d776_cb29_d434d46ecb6f">

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;

</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000114875Member"
      id="t_1_1363b967_1858_8f75_923b_14e2a243d11f">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114875Member"
      id="t_2_ec4070d2_1a8a_6632_ad6f_05f71899f1c0">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114875Member"
      id="t_3_93f64c00_438e_e5d7_37f7_4a4d6ae45a3c">JCNNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_5_b0f92c5c_9f66_c879_aadf_b8e721120944">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114875Member"
      id="t_4_1486766c_c575_1c27_8a81_8b3cfa30d534">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_8_76e9b305_a847_4dcf_ff05_d382b87da658">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114875Member"
      id="t_6_7fd3ead8_1609_309a_436a_d7ebb5545286">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114875Member"
      id="t_7_9722830a_ef5e_57bc_06fa_584e176488f3">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_9_02895808_77cb_0116_651e_e8370c110f5e">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_10_c0693141_3c44_7ca1_10cc_59f2708598a9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class N Shares/JCNNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;60&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.51&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114875Member"
      decimals="INF"
      id="h_349_4462074d_de53_461d_bc55_a536f81cfb52"
      unitRef="USD">60</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114875Member"
      decimals="4"
      id="h_350_95b25cd3_3c70_4cdc_8316_c13079af63e5"
      unitRef="pure">0.0051</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_24_b555e16b_cadf_ffb6_c8a0_4951157cadfd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class N Shares returned 33.91%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_12_0c592ad4_ae4d_9640_3693_a49df27f32d8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277514.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_13_b163533b_ece8_c3d8_bf62_eb6189e0b000">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class N Shares/JCNNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000114875Member"
      id="t_14_629cf85e_c233_a2a5_12b9_69b9b136c50f">Janus Henderson Contrarian Fund (Class N Shares/JCNNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000114875Member"
      decimals="4"
      id="h_351_d341139b_16ea_4e59_8928_9c2cb798fda8"
      unitRef="pure">0.3391</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000114875Member"
      decimals="4"
      id="h_352_9d7483f5_a8f5_461d_926f_ac50d62e1369"
      unitRef="pure">0.1425</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000114875Member"
      decimals="4"
      id="h_353_1230c8b7_0493_42ef_836f_1f2d863d1d01"
      unitRef="pure">0.0982</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_15_9f82f7f3_e0a8_182c_862d_7001c00840b2">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_354_73ee0d2e_c8d0_45b7_bf8a_5f9f02ead3e3"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_355_9d0062bb_158a_419e_8932_76c9b76ae3f4"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_356_29f99ba2_5889_412b_8b9e_c793ffd06f78"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114875Member"
      id="t_16_3e62cbf7_de44_7c1c_257b_313ec0fcfad3">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_17_39a74309_a4ae_8cd0_3a44_8ba22037e210">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_18_1f81fdb9_45bb_40e1_955c_6d0135e8e9b3">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_19_c421a66f_f85e_9f25_a51f_1b49d6d13eab">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114875Member"
      decimals="INF"
      id="h_357_2fa4d687_b132_44cd_a947_b59c2526be15"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114875Member"
      decimals="INF"
      id="h_358_c879a0f2_9e1c_4d9d_b94a_baa874b23040"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114875Member"
      decimals="INF"
      id="h_359_c51ed47b_a5a8_4728_9059_aef51519ad75"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114875Member"
      decimals="4"
      id="h_360_606187d1_f92b_490e_a96e_bba46791c819"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_20_413772de_46ee_c209_e1bf_c312f0402af0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277524.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_21_cf8f3851_a816_36ba_87d7_ac010c93fc48">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_361_fd163c19_b1fa_45c5_a171_c555c957fa76"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_362_68b8f574_e84b_4fed_bbca_6825fda6c8af"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_OracleCorpMember"
      decimals="4"
      id="h_363_86ea9414_735b_4ac9_85c6_37d6daf63716"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_364_c162f38c_2ef2_4c05_99c9_7234a7b6cb5d"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_AmazonComIncMember"
      decimals="4"
      id="h_365_cc0e456e_6927_43a4_87a2_bda2e5329e54"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_CommonStockMember"
      decimals="4"
      id="h_366_bab59beb_43a5_4034_ac9f_27e05df954dc"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_367_4f7e11f8_2e8c_4eee_98f9_76feb405a8df"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_368_4637aecf_6cd5_49a9_a5a5_9bd092ee33fb"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_369_50dc6351_18c6_48e0_80cf_415abde60810"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114875Member_OtherInvestmentsMember"
      decimals="4"
      id="h_370_55d538f3_10e6_4cd8_86d8_067cfa775f1d"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_22_704eb7ef_f0b4_b61f_3e01_9b10df6182d5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000114875Member"
      id="t_23_61aec13c_621c_6408_05b4_a40221cc2d49">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077686Member"
      id="t_1_9695c58b_6b18_c7b5_12de_c756ed0d26de">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077686Member"
      id="t_2_39a75103_1e06_5232_494d_cbb4dc1d2677">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077686Member"
      id="t_3_8849958a_d2d1_7860_d0e8_c878a09925f6">JCNRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_5_9392ff3b_f0e0_bd54_f6cf_6a4d60bd7748">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077686Member"
      id="t_4_5ef054f5_412e_95d6_b8b5_b9aadd3d4dfb">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_8_336788c2_92b1_8fa8_fcff_6b4e9186d3d1">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077686Member"
      id="t_6_a5ff0802_ef85_e5e5_1980_be27d6473036">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077686Member"
      id="t_7_2453e487_29a6_63f3_3102_6be235e5f158">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_9_e2588ab9_8693_64fe_53e5_c5229487da0d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class R Shares/JCNRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;157&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077686Member"
      decimals="INF"
      id="h_371_280f3418_248e_4c39_b3e7_6b0bbdbe29b0"
      unitRef="USD">157</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077686Member"
      decimals="4"
      id="h_372_8f42ccad_bf6a_4a71_ac29_ef6a15df3447"
      unitRef="pure">0.0135</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_21_b6ee93a8_61c2_71e8_1073_d65b961108d3">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class R Shares returned 32.78%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077686Member"
      id="t_11_4c07336d_ce96_92ed_970f_994ae681e760">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277553.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_12_598222e6_6674_643c_8d6c_bba78729f842">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class R Shares/JCNRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077686Member"
      id="t_19_32029ed9_f88a_692a_4154_94ccb963e388">Janus Henderson Contrarian Fund (Class R Shares/JCNRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077686Member"
      decimals="4"
      id="h_373_f862dfd4_3b7b_489d_aeb8_b79c3dc9086c"
      unitRef="pure">0.3278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077686Member"
      decimals="4"
      id="h_374_888071bc_c1ff_4943_9f6e_f920be26cbeb"
      unitRef="pure">0.1326</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077686Member"
      decimals="4"
      id="h_375_dac9cf42_8e8e_4f1a_a12c_f5487a87d48c"
      unitRef="pure">0.0898</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_20_6ebda9bb_0b08_6d6d_f263_b0d1565b941f">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_376_a1b4140b_63ae_4889_863a_36ad3cbd346e"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_377_a5038ed2_69d0_45fc_bf91_5f5b01ed7d02"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_378_19a963da_0657_4ec8_8889_844f08d851f1"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077686Member"
      id="t_13_40d92d9d_d1d8_7be1_e548_6642a28ec735">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_14_5b13b56f_1b8c_4408_9df0_8a2e5f865997">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_15_dd9f442a_4818_91d4_0d23_b34185f369aa">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_16_0887a816_d23b_1bc5_ea52_3ccb3c372892">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077686Member"
      decimals="INF"
      id="h_379_a76b6592_0262_4fbd_960e_bf0968941e58"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077686Member"
      decimals="INF"
      id="h_380_394fe66f_1a95_460d_a37c_c4bfe4299631"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077686Member"
      decimals="INF"
      id="h_381_ff4906fa_be1a_42ec_9f4e_73baf1a47619"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077686Member"
      decimals="4"
      id="h_382_a107fa63_a3d2_4f89_8789_2db7fff083f8"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_17_42370909_d909_64d0_e740_8e5d44351917">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277563.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077686Member"
      id="t_18_273ff24f_9d61_8e1c_0a58_5c1a4be65666">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:PctOfNav
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      decimals="4"
      id="h_383_9fd7bd21_edee_4caf_86fa_8ceb509662c5"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_384_b0a48526_76ce_437c_99f5_7e226e89fd3a"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_OracleCorpMember"
      decimals="4"
      id="h_385_e176da7a_706c_4507_b83a_3277add0b0f6"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_386_6001d470_847d_49c2_bf3b_d6c63372a6af"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_AmazonComIncMember"
      decimals="4"
      id="h_387_9c628c84_f28b_4dd0_8015_59b798e10174"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_CommonStockMember"
      decimals="4"
      id="h_388_a4ea32ae_9b4c_4bfe_ae61_a92e7e216474"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_389_6f76c9c8_744b_424d_b15a_a698615c758b"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_390_da2a4b10_f24c_45f2_a4ca_ffb3c732d16d"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_391_50d1b0a2_f72f_41e5_b663_0635b5530ca4"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077686Member_OtherInvestmentsMember"
      decimals="4"
      id="h_392_fb1f09f5_261a_4993_88ef_2b11ad2f30b7"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077687Member"
      id="t_1_db02c95d_4f0d_5bdd_cb85_85805403a69f">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077687Member"
      id="t_2_b22464b4_326d_e30f_db93_1bac63e832d9">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077687Member"
      id="t_3_ba94ce92_b1bb_e083_cda8_2b126a3f3814">JCNIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_5_4732ce0c_7c93_78c2_a14a_0f4aee8b31c4">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077687Member"
      id="t_4_ff98f556_489d_facb_8c73_0de1b11fc284">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_8_ad11f753_24d2_303b_155c_a9ed51fec527">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077687Member"
      id="t_6_7f8a8b00_21c3_da06_fc53_36ef0670727c">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077687Member"
      id="t_7_f7d54a5d_9de9_08a2_a368_fd06e7e86d3d">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_9_a3b97ad4_bd48_ef3c_8cc2_df8f2f1a4ef7">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class S Shares/JCNIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;127&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077687Member"
      decimals="INF"
      id="h_393_e327c7da_a25a_4a34_b1b4_349274d2d469"
      unitRef="USD">127</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077687Member"
      decimals="4"
      id="h_394_cc1a6f72_8d07_4ee2_9355_0d6c052ba765"
      unitRef="pure">0.0109</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_21_eebbe130_45ec_8e3c_ad18_45f5b1f79e31">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class S Shares returned 33.10%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077687Member"
      id="t_11_f7d75488_8eda_68d8_6b4f_e830df923875">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277592.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_12_f7d9f816_8c82_087c_81b0_ae0e571452cd">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class S Shares/JCNIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077687Member"
      id="t_13_6a44b305_de51_8b7d_0f49_340526308dae">Janus Henderson Contrarian Fund (Class S Shares/JCNIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077687Member"
      decimals="4"
      id="h_395_d03670b9_8c97_4f22_a68a_e70ea2c04979"
      unitRef="pure">0.3310</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077687Member"
      decimals="4"
      id="h_396_f9288c82_4a72_4ce7_af2e_7b0538012b0c"
      unitRef="pure">0.1356</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077687Member"
      decimals="4"
      id="h_397_f1b63d73_f721_43be_8e54_a609ada8b110"
      unitRef="pure">0.0928</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_14_6f5cecf5_25a7_f1f1_b41c_8e6c62b15d79">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_398_b861dd57_353d_4f84_83b9_019bbdd55d8e"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_399_d0c25154_c559_48ea_a180_c2c688cf2cfa"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_400_948fb5b5_3f72_4fda_9679_c8232e12457c"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077687Member"
      id="t_15_821cc9f9_9268_7167_a7a6_c548779a5bfa">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_16_2e418d92_5ffb_d772_c789_572bf5078199">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_17_37f51444_3a55_17fc_540a_43ac01d09270">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_18_ad160e8b_b96b_d43d_72f8_4c749dba1fa9">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077687Member"
      decimals="INF"
      id="h_401_3de64e86_fc67_48c3_890d_bce2ff6fe4f0"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077687Member"
      decimals="INF"
      id="h_402_56ce05a5_5cc6_4639_ba31_6e78da8392ab"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077687Member"
      decimals="INF"
      id="h_403_3c8295b5_9a26_46d9_83d1_e906c00649cd"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077687Member"
      decimals="4"
      id="h_404_8cc0c16c_17e8_4c7c_aed9_740aa37abac2"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_19_3e0aec63_14dd_c134_5fbb_68475bf3c2e1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277602.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077687Member"
      id="t_20_b127bbdb_63da_a7eb_b39e_af5a7b2193b3">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_405_af20aa86_427d_4bbf_9df9_fef2ea647619"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_406_9b654235_cbf7_461b_ae61_56bd5191623e"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_OracleCorpMember"
      decimals="4"
      id="h_407_b4fa1878_8015_4125_8cb7_b95aa195ffa4"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_408_95842962_72d6_434a_b365_11624617580b"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_AmazonComIncMember"
      decimals="4"
      id="h_409_dbd2bccc_1258_44df_889f_3cbe07bd0d2f"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_CommonStockMember"
      decimals="4"
      id="h_410_31826e4f_0472_4369_ad3d_ecbab86cd7ee"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_411_9ef0d68f_2fd8_4e57_bd51_16b62265b296"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_412_4c43cf93_154a_4f7e_8a16_416ef0c99da4"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_413_f83dcf38_0497_46db_9053_fc6a0cd8a511"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077687Member_OtherInvestmentsMember"
      decimals="4"
      id="h_414_8bd606cf_24a8_4c04_a597_2f014904fc49"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028934Member"
      id="t_1_d672284b_6c9c_2d4a_9269_b611fa9600cb">Janus Henderson Contrarian Fund</oef:FundName>
    <oef:ClassName
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      id="t_24_c59fa9b2_f6ea_0408_c69e_857f133ccd98">Class T Shares</oef:ClassName>
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      contextRef="FY2024_C000028934Member"
      id="t_25_0a04c166_7b0f_d2f5_df75_f97433e3d9d2">JSVAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_3_ac9b9c35_e11f_d7c3_5039_faf8769731df">This annual shareholder report contains important information about the Janus Henderson Contrarian Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028934Member"
      id="t_4_80791015_53ea_e027_e0ab_bbc223f3a971">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_5_0dca3f6a_c748_617a_ddd0_682fcc78da69">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028934Member"
      id="t_6_7b47be61_2f2d_3640_f992_7274baf7f5dd">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028934Member"
      id="t_7_64ef7f78_0cc6_afdb_3a8d_5f680f0e73b5">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_8_95bf18bc_c252_128d_575c_540351bca90e">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_9_41bf39ca_c4ce_e469_85d0_327ab1e08876">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund&lt;br/&gt;(Class T Shares/JSVAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;86&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028934Member"
      decimals="INF"
      id="h_415_0b6662c4_4114_4d84_9d67_9c23e419c56e"
      unitRef="USD">86</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028934Member"
      decimals="4"
      id="h_416_31eb14ed_5c77_46f4_b21b_ac251a2a5bb5"
      unitRef="pure">0.0074</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_26_fd3dc24c_6cde_418b_615d_045a43e24ac0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Contrarian Fund Class T Shares returned 33.57%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to relative returns. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. AST SpaceMobile, another contributor, is an early-stage communications services company building a low-orbit satellite network. The stock rose as the company secured contracts and funding from major telecommunications carriers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;An underweight in the information technology sector was a notable drag on relative returns. A position in industrial equipment manufacturer Chart Industries also detracted, as delayed deal closings resulted in disappointing earnings. Oil and gas producer Occidental Petroleum, another detractor, reported weaker-than-expected revenue and profits that pressured the stock performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000028934Member"
      id="t_11_2eee4e13_afa0_720b_9333_43b83aeb22bf">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277631.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_12_506d976d_80ab_9528_0dd4_43522b0c8061">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Contrarian Fund (Class T Shares/JSVAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028934Member"
      id="t_21_bed7957c_0f9d_9b3e_588b_60d7dad722e9">Janus Henderson Contrarian Fund (Class T Shares/JSVAX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028934Member"
      decimals="4"
      id="h_417_26619fe4_f6ff_4ed5_8814_e69caae9d3d8"
      unitRef="pure">0.3357</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028934Member"
      decimals="4"
      id="h_418_47c5c6fd_6fff_4fb1_9be2_62bb75b4cf8d"
      unitRef="pure">0.1398</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028934Member"
      decimals="4"
      id="h_419_2fdb7c9b_b72d_4ce9_9cca_43d917d192c9"
      unitRef="pure">0.0964</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_22_164c0a5f_165d_e2ed_97dc_b7bd4bdff8f4">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_420_2044729a_15a5_4c7b_8cac_70961f5c54e2"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_421_78ad1efe_cefa_428f_85c7_d03cbc4c64fa"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_422_76b07315_2f9c_47f0_b080_aa0825f1fee2"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028934Member"
      id="t_13_05f27831_cf12_8783_ae49_5a4dbdaf85f9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_14_987ff538_4892_1989_3526_d6565738ca64">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_15_d1ca013e_7917_18d4_c3aa_27b7c73b8ea5">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_16_3b20ae1e_c7e9_21ba_9d72_d58f52193d55">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4,993M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;48&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028934Member"
      decimals="INF"
      id="h_423_68202096_a48a_4004_87e6_931ab95d8542"
      unitRef="USD">4993000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028934Member"
      decimals="INF"
      id="h_424_df0664fb_306e_4e1b_8a0e_f79f71999150"
      unitRef="Holding">48</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028934Member"
      decimals="INF"
      id="h_425_2577e257_ad56_4f3d_b6c1_85adbcbbb6ea"
      unitRef="USD">22200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028934Member"
      decimals="4"
      id="h_426_d6259271_cdbe_4e56_95fa_9a9611a2beb6"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_17_2a109572_dfd7_105d_cb43_520e556b2f04">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277641.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_18_1a1f9dee_4ae7_d856_a62c_9769e6f38d8f">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Caesars Entertainment Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vertiv Holdings Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Oracle Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;PNC Financial Services&#160;Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_CaesarsEntertainmentIncMember"
      decimals="4"
      id="h_427_8e85ec72_bf7c_4321_b42f_f3fdd458abdd"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_VertivHoldingsCoMember"
      decimals="4"
      id="h_428_169c36b0_5828_4613_b922_ccbf376d8b2b"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_OracleCorpMember"
      decimals="4"
      id="h_429_1cf84806_7eda_4030_94c7_d999a4971cd6"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_PNCFinancialServicesGroupIncTheMember"
      decimals="4"
      id="h_430_477fe34e_ba1d_4bb2_bd5b_a0718d236190"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_AmazonComIncMember"
      decimals="4"
      id="h_431_eaafb299_1d85_4ca9_8f17_23755b72c47e"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_CommonStockMember"
      decimals="4"
      id="h_432_8138fd39_c0ea_49be_ba16_f4dbfc85a986"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_433_ed33923f_8fb0_432c_a761_db27a3e54b8c"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_434_974e15d7_3d8c_4865_97bc_248c36ca9ab0"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_435_e3d9ae0d_f1cc_4e8f_b063_ba62a924484f"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028934Member_OtherInvestmentsMember"
      decimals="4"
      id="h_436_2586fcfd_dd8f_475a_8599_721b0cd840aa"
      unitRef="pure">-0.014</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_19_4da5f00a_5373_f2e3_c021_8f7ccf7ed858">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000028934Member"
      id="t_23_b900b33c_e299_f757_17ea_572a7b8e2127">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000183873Member"
      id="t_1_4de4373c_3f16_c712_4bb9_af2f03777992">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183873Member"
      id="t_21_20bd9b0c_aef8_9d7d_8c23_8538721d8259">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183873Member"
      id="t_22_e1f263c8_2dab_5aad_65fa_ca833978e4cc">HEMAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_3_94109121_3b08_0ad6_5f40_18a1045e8643">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183873Member"
      id="t_5_930e47b4_8ee6_9a47_a99c_3007d5c704ba">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_4_29b42908_f9be_bc18_2798_70df52e60135">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183873Member"
      id="t_6_9da3927f_2609_4e17_5f0a_eabf214bc9e5">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183873Member"
      id="t_7_5e88a4b8_f883_c36c_cfc7_86bc7b6f034f">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_8_a99664df_96e8_b30d_d6f1_70389ce3e1c5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class A Shares/HEMAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;151&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183873Member"
      decimals="INF"
      id="h_437_8acb84f7_39fb_44b2_9a88_3aea6762b999"
      unitRef="USD">151</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183873Member"
      decimals="4"
      id="h_438_93b946a9_029d_4de4_b616_3aefbb5769a9"
      unitRef="pure">0.0139</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_23_81a97b0a_9f60_e9df_4bca_782e43807d2e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class A Shares returned 17.00%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_10_5f8d5fe0_3e57_1523_43e0_be641d8edf02">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274355.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_11_7fbc8efe_f6fd_c9d3_021d_7acaa355581a">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class A Shares/HEMAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class A Shares/HEMAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183873Member_WithoutSalesLoadMember"
      id="t_18_93611d10_ea53_2e4e_481e_752415a3520e">Janus Henderson Emerging Markets Fund (Class A Shares/HEMAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183873Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_439_535bf5e2_91d5_4035_9bab_f2907dfcadd5"
      unitRef="pure">0.1700</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183873Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_440_f57063d6_2ec0_4eb7_9022_b134278a3b16"
      unitRef="pure">0.0343</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183873Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_441_ee28ad75_3bc8_456a_98d0_8ede00c1e915"
      unitRef="pure">0.0190</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183873Member"
      id="t_19_59c1d31a_2df8_f911_43e6_6903e2ad05cf">Janus Henderson Emerging Markets Fund (Class A Shares/HEMAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183873Member"
      decimals="4"
      id="h_461_a39605b9_90cf_48c8_5472_5fc71bde33a8"
      unitRef="pure">0.1030</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183873Member"
      decimals="4"
      id="h_443_d68a0c4b_d28d_461e_9894_1104b7458a94"
      unitRef="pure">0.0222</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183873Member"
      decimals="4"
      id="h_444_b14048ac_6c91_402d_9b8d_31d1f484198f"
      unitRef="pure">0.0130</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_20_057aac64_89bc_c290_1cc7_e385fccf63f2">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_445_7392f700_cfac_4818_b77b_f1661c5f990a"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_446_b1350238_1f4e_4794_80a8_70b0da2dac9c"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_447_d9b15020_bea4_4ec6_9c62_c9f06fb4da3e"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183873Member"
      id="t_12_97beadf7_5d33_4c2a_d551_60442abdecd2">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_13_dd5116d1_5613_cd68_f531_861060905499">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_14_d8eb024e_3ccc_a67c_2ccf_cd671b63774a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_15_6335ee41_ecc7_2e13_e843_8f39fbceb3cd">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183873Member"
      decimals="INF"
      id="h_448_39fc6e75_4819_4c53_ada3_236a61853e5e"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183873Member"
      decimals="INF"
      id="h_449_31956fa7_491f_47ef_b2e9_7315be0cefde"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183873Member"
      decimals="INF"
      id="h_450_5e3a960e_98d8_46f4_9cf2_ae6c62e86bdc"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183873Member"
      decimals="4"
      id="h_451_81176583_264d_4142_aaf2_cfcab4643b79"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_16_bd33c4f3_b372_05e3_4d08_1cf513eb9cc1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274365.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183873Member"
      id="t_17_b5993319_7438_d082_00f4_73581d8d01d5">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_452_6ece1f2d_9176_4f00_a1d1_4aa212cf93a7"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_453_465ad746_ca56_4551_8bc1_0ed811d37196"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_454_05ca2f11_4136_44c6_a016_8b8bbe927d07"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_455_cb59230a_104c_4e7e_96c0_2f60adc98149"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_AIAGroupLtdMember"
      decimals="4"
      id="h_456_6a8d5f44_3677_4ab3_a75b_4f23a96084a8"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_CommonStockMember"
      decimals="4"
      id="h_457_eecfcf9f_5855_4b83_baef_22a27cedf321"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_PreferredStockMember"
      decimals="4"
      id="h_458_99bb26f2_d740_46ec_a8f0_5e077106d67c"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_PrivatePlacementsMember"
      decimals="4"
      id="h_459_91da8195_5b8c_4192_8cf5_337fd6b15d7f"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183873Member_OtherInvestmentsMember"
      decimals="4"
      id="h_460_f1a8fa67_8dd6_455b_8c1c_7c6ae7f0f5b3"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183875Member"
      id="t_1_9c378b2b_5193_ce26_8994_cb7a841f2412">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183875Member"
      id="t_21_ae4370e4_286c_610a_9b35_7cd4d7559eda">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183875Member"
      id="t_22_faef386d_9ed4_df42_931a_31335d5e9cd1">HEMCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_3_cf1278b7_3850_1946_2e75_35f4eeab433f">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183875Member"
      id="t_4_bf1b245e_6d4f_f76c_b6ed_0f39776accfb">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_5_1292b5d0_f23f_6f1c_b069_04bdac007c24">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183875Member"
      id="t_6_80fd8d9c_cc21_cc8f_4394_c2e78eab705d">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183875Member"
      id="t_7_212771f9_c6df_1170_f49b_8131c17ef706">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_8_fc985d8d_3859_eebd_c88a_ec30831a359e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class C Shares/HEMCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;229&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;2.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183875Member"
      decimals="INF"
      id="h_461_ef46fb42_fee3_45f2_8875_abb23fc14222"
      unitRef="USD">229</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183875Member"
      decimals="4"
      id="h_462_10ed6eac_5b97_40b9_bc0c_39d3a7b6cec3"
      unitRef="pure">0.0212</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_23_af3f698f_4019_90cd_7829_cf61284d9d8f">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class C Shares returned 16.17%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_10_4e82c561_5a1a_8134_8c4b_c363de8e440e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274394.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_11_de83db41_ee5d_a760_777b_c41ea321fc7d">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class C Shares/HEMCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class C Shares/HEMCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.17&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183875Member_WithoutSalesLoadMember"
      id="t_18_890a3031_ee13_e399_e2ed_82a3a69e93ee">Janus Henderson Emerging Markets Fund (Class C Shares/HEMCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183875Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_463_2c420f35_4116_4479_9529_95a83391cc39"
      unitRef="pure">0.1617</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183875Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_464_3cc0c536_ba5b_42e0_9a69_edf7366ed277"
      unitRef="pure">0.0267</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183875Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_465_32b5c55d_e863_4d73_b305_22cec9dec2f1"
      unitRef="pure">0.0114</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183875Member"
      id="t_19_e8094227_2dbf_6b7b_4428_4a3691aada10">Janus Henderson Emerging Markets Fund (Class C Shares/HEMCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183875Member"
      decimals="4"
      id="h_466_4b70fb78_631c_45f0_9494_a0bcb66e5908"
      unitRef="pure">0.1517</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183875Member"
      decimals="4"
      id="h_467_42dd5027_b134_43b7_921d_b2f27a60e47f"
      unitRef="pure">0.0267</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183875Member"
      decimals="4"
      id="h_468_0312cc36_850e_49a1_8f31_97aaabbac3c8"
      unitRef="pure">0.0114</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_20_8c38ac1d_b720_34f8_083c_74c24b193fc7">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_469_97d0083a_e169_4d3e_b907_02be1d2cd22c"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_470_d4f44565_b650_40ff_8ca2_186c2694d609"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_471_f1f93756_a9e6_422f_8cad_272cc4d3e9d8"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183875Member"
      id="t_12_7a25c387_bccd_f290_7257_581d34c9354f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_13_13b020c3_518b_333b_654a_f805696939d6">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_14_0982ee5c_715a_0541_9573_92898a69bbc2">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_15_9873d541_2dd4_a3fa_696f_b1b24c6728c9">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183875Member"
      decimals="INF"
      id="h_472_bf38425e_ca72_4798_887a_77982407613a"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183875Member"
      decimals="INF"
      id="h_473_88cc8d82_2a0a_42c6_835d_1104f95e3229"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183875Member"
      decimals="INF"
      id="h_474_765d96a4_f867_481d_8a8a_1c5cf78f46c6"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183875Member"
      decimals="4"
      id="h_475_5330f903_7aa2_4bee_9802_48b34ec57bdf"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_16_2cadebaf_4baf_947e_85d8_70be6941f5e2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274404.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183875Member"
      id="t_17_87ae4bbb_b3dd_665b_1cac_1282409e65be">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_476_2cdabb6c_4f7b_48c8_9a10_86c2f5b721e1"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_477_cd8ca09d_aef7_41bc_b694_3b79d4d5894e"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_478_8ef8c7a1_7618_418e_b79f_8c7ae7b18fc8"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_479_bf6a0f17_49d9_4c9e_9890_d727f392bc97"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_AIAGroupLtdMember"
      decimals="4"
      id="h_480_192c4c85_abc6_4228_95fb_10e9fb9f1071"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_CommonStockMember"
      decimals="4"
      id="h_481_df578881_9798_41cb_9268_280a1ddf48be"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_PreferredStockMember"
      decimals="4"
      id="h_482_05994a67_c1f2_47c0_80a9_a3eed9adeea3"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_PrivatePlacementsMember"
      decimals="4"
      id="h_483_2ec05860_639e_4d49_9611_8c57f4d264e7"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183875Member_OtherInvestmentsMember"
      decimals="4"
      id="h_484_a0f788a2_84dd_4e73_94ef_6dc9b687e2a0"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183876Member"
      id="t_1_880b9afd_b1a7_f125_3c97_7c6a87999a77">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183876Member"
      id="t_4_c6cda30c_ff38_1491_7c45_1c1bce262933">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183876Member"
      id="t_3_8c42b553_e5bf_4952_4c79_9d928efd0ee8">HEMDX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_6_4798f2a4_7002_449a_7ef1_b48219e5dbac">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183876Member"
      id="t_5_a0d91778_f61e_12e2_2fa4_a74baeec8494">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_7_f4a3dce5_28bb_0102_4f18_4dd9d2efbac3">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183876Member"
      id="t_8_818c8a5d_2794_c577_81f3_8890f94b6cad">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183876Member"
      id="t_9_8bd88584_d19b_f03a_a425_eb5674b515d9">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_10_f9f5d756_f8f7_b621_76dc_7fe34a22383e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class D Shares/HEMDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;129&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183876Member"
      decimals="INF"
      id="h_485_4474a41a_7aab_4f02_ac9f_99564ac15388"
      unitRef="USD">129</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183876Member"
      decimals="4"
      id="h_486_3a020df1_0d21_4f7f_a7c0_5241b7235429"
      unitRef="pure">0.0119</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_22_dccc6a31_7109_93ec_02dc_587184f1b187">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class D Shares returned 17.27%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_20_ef828b9f_c86a_4682_0de5_6294e18ce284">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274433.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_11_cfe19149_161c_0302_dc1c_b1c6ea6869cf">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class D Shares/HEMDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183876Member"
      id="t_18_3098cc1e_e534_ea21_e7f3_66c25d1ede98">Janus Henderson Emerging Markets Fund (Class D Shares/HEMDX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183876Member"
      decimals="4"
      id="h_487_b8785be1_4b5c_43e0_8397_20dff1d9e578"
      unitRef="pure">0.1727</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183876Member"
      decimals="4"
      id="h_488_e104927e_421b_4670_86bb_82e964a6ba7a"
      unitRef="pure">0.0365</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183876Member"
      decimals="4"
      id="h_489_0710895f_f6ea_4bba_95ba_a0c7bfb79a58"
      unitRef="pure">0.0203</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_17_2a03a0fe_32d3_400a_c273_70b4ee4bd1fa">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_490_d6968a3b_f26b_433e_a986_e784809eeb42"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_491_b9fbf059_3f07_460f_b97b_29d5e552b233"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_492_4c57d25e_a065_47d6_a8b8_f85a6b81c940"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183876Member"
      id="t_12_3e1483aa_1807_7c7e_dc24_744125f67260">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_13_459e9c57_d97e_778d_016f_cd2f468d15af">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_14_527f4027_f1aa_7690_3874_595fd60f1b09">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_15_587b9867_1c85_dbdb_cca5_1a2c0be41bd7">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183876Member"
      decimals="INF"
      id="h_493_c9f5d7fa_933d_4f60_90bd_b3d20b0271c4"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183876Member"
      decimals="INF"
      id="h_494_b9e8dc29_c771_4a7a_8dd7_be1f657290ee"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183876Member"
      decimals="INF"
      id="h_495_b20047b0_c5aa_4e2d_b141_54d1e7cb8be0"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183876Member"
      decimals="4"
      id="h_496_532d180e_d0a8_433c_ac51_786160090e41"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_16_b54eff4a_dc5d_6784_92ea_a022acc8b9ce">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274443.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183876Member"
      id="t_21_a95ec326_e756_de55_e501_ae836e299bda">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_497_83646817_91f6_4d93_a193_eb93bc9e8e8a"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_498_5aa3b183_b49a_4183_bd12_07832dff7e77"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_499_c1eba207_c14b_48d5_9eae_3318fd26a67e"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_500_8b74ef2f_8cb7_45bc_a2bb_7a1885cff9b0"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_AIAGroupLtdMember"
      decimals="4"
      id="h_501_add7375d_d96b_48f2_93a7_c137dd4dbc94"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_CommonStockMember"
      decimals="4"
      id="h_502_1abe9891_89f3_42ee_a501_a14fc24469d2"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_PreferredStockMember"
      decimals="4"
      id="h_503_9bd8e5de_ef0a_4411_a322_0cebbfe6ef04"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_PrivatePlacementsMember"
      decimals="4"
      id="h_504_ed1e5694_387c_4bba_bcf4_edd244fe312d"
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    <oef:PctOfNav
      contextRef="TI20240930_C000183876Member_OtherInvestmentsMember"
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      id="h_505_e10ac7be_258c_453d_8db9_6f4be371c0e0"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183877Member"
      id="t_1_63c4b0fc_6b1f_8e91_57be_ecd3e6b88ffc">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183877Member"
      id="t_2_99712b21_a13e_e615_4960_29f3a833c480">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183877Member"
      id="t_3_808ea882_454e_61ac_9d78_81a37e613ed9">HEMIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_5_6103ca06_9d0c_b4f4_db19_e8cb7bf270c1">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183877Member"
      id="t_4_d8714c83_10b7_489f_9f9e_30d247858515">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_6_d14e461b_9efd_efed_8320_e9fbe9aa4a18">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183877Member"
      id="t_7_5434202f_5aa0_8831_ef6a_5bb4578cd396">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183877Member"
      id="t_8_8f3f1afb_5c3f_4f9c_cf6c_ef031a745801">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_9_46d8d2bd_1079_d070_8ee8_f33a4524a6b9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class I Shares/HEMIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;122&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183877Member"
      decimals="INF"
      id="h_506_089fe65c_0a8d_421e_8117_36650df75be6"
      unitRef="USD">122</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183877Member"
      decimals="4"
      id="h_507_972a297a_1923_4de3_bbe5_94158f1998af"
      unitRef="pure">0.0112</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_21_0d914876_29f9_0b98_1a9c_bc6290dfb323">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class I Shares returned 17.34%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_19_665d3b45_e76a_c054_ce4a_1bb43857fb2a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274472.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_10_40e4720a_5e53_72b3_50dd_e33c8ebd554c">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class I Shares/HEMIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183877Member"
      id="t_16_ee68d026_27f6_9380_b6c9_c09813900fbd">Janus Henderson Emerging Markets Fund (Class I Shares/HEMIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183877Member"
      decimals="4"
      id="h_508_bb1e7ff3_f280_4ce3_b12c_04a37b6d8a09"
      unitRef="pure">0.1734</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183877Member"
      decimals="4"
      id="h_509_a671a621_bca8_43e4_a733_38307669ac7a"
      unitRef="pure">0.0370</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183877Member"
      decimals="4"
      id="h_510_cf8fe9da_897e_451d_8d72_ca1fe93e3d5b"
      unitRef="pure">0.0217</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_17_e6fc7b46_3d46_f75e_97b3_2d8b8e5727b8">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_511_5dfcc8a8_9c23_4dd9_9675_5e7bce3e42eb"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_512_c9f9e422_d108_453f_98a4_39612a9e33a4"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_513_abbd4d69_3523_435d_9c07_1942c4f177eb"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183877Member"
      id="t_11_9a202b6f_c9f1_d1be_a7b3_4422f7b19bdb">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_12_2ea484db_8e52_d79d_ce8b_e0f0a9e86ea3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_13_b8c0c614_8a91_5334_ef4a_63be34067aa7">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_14_e747a7d6_8e46_51fe_85c8_c02ba2904fef">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183877Member"
      decimals="INF"
      id="h_514_f21a4b90_6c49_47f8_8196_9bf0a0dd5f5c"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183877Member"
      decimals="INF"
      id="h_515_152497b8_d70d_4804_bc6c_51181e6adbaf"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183877Member"
      decimals="INF"
      id="h_527_44fd44fd_5d83_26cc_892e_ead03b3b6bc3"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183877Member"
      decimals="4"
      id="h_517_e4570070_e36b_4b3d_b365_12ea17c494e9"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_15_81979486_0a3d_487d_2391_9e10a4d5a5de">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274482.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183877Member"
      id="t_20_5a04ba8f_6b4c_f1d8_f3b7_2e358eb33b23">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_518_09d1a00c_3219_419d_ad8a_c39aa4afd000"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_519_fe65a8dc_098e_44b3_97f3_fd7060dcaa0e"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_520_4166d570_cb87_4019_8578_2ca901328234"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_521_bc8a7066_fdc7_4222_ba9d_3cbd2d7d101c"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_AIAGroupLtdMember"
      decimals="4"
      id="h_522_1536779b_5c84_48ff_ad97_ee11f58802ed"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_CommonStockMember"
      decimals="4"
      id="h_523_c6c7881a_4942_47f2_9b7f_38f6e1358ac2"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_PreferredStockMember"
      decimals="4"
      id="h_524_42d9f459_af6e_4838_816a_6733f18fc4e9"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_PrivatePlacementsMember"
      decimals="4"
      id="h_525_f8ceca33_70f4_405e_ac07_68b0d1670247"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183877Member_OtherInvestmentsMember"
      decimals="4"
      id="h_526_f4615f71_1b61_450e_8e4c_91628064a8ee"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183878Member"
      id="t_1_7c94e59e_d1a2_331e_aa2f_e8ec1cc0816a">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183878Member"
      id="t_2_da3f0385_b437_3944_c2b0_3f3c8d847e32">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183878Member"
      id="t_3_f5f58ae3_c769_7af3_fdf3_d9d1f95e7701">HEMRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_6_1dcc4e55_90f6_bc4f_2ead_c22048a2ff61">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183878Member"
      id="t_7_f3b0c697_72e2_afde_dc45_bf0ddfd6b491">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_8_16f0bf1f_53a0_c4e3_7676_79f78f1cbfb3">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183878Member"
      id="t_4_2468949a_6231_0b65_0cc6_d7f547987b2e">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183878Member"
      id="t_5_0c282466_b6f9_e8ee_e4aa_0aa854b77f37">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_9_3c957e1e_3515_4c15_9ae1_5a93c926cfc1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class N Shares/HEMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;113&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183878Member"
      decimals="INF"
      id="h_527_e0f3a0e8_428a_4861_aef2_445e070e1957"
      unitRef="USD">113</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183878Member"
      decimals="4"
      id="h_528_98b2168a_d8fe_4c4d_b952_d16650c41044"
      unitRef="pure">0.0104</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_21_50d57c3f_3c9f_7b32_a898_df770c99a3a0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class N Shares returned 17.33%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_11_65f8d17b_3585_839b_ec5f_69fa05a469be">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274511.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_12_b06266b8_0848_7c0c_5cd6_62aba0bd5866">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class N Shares/HEMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183878Member"
      id="t_19_887fa003_0231_b5ae_55a1_d2ea2b7d5d26">Janus Henderson Emerging Markets Fund (Class N Shares/HEMRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183878Member"
      decimals="4"
      id="h_529_4e81e536_8872_4d8c_80a3_94b65c8c7c3d"
      unitRef="pure">0.1733</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183878Member"
      decimals="4"
      id="h_530_e1330e1c_ea30_4620_9709_f41c892c2bab"
      unitRef="pure">0.0376</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183878Member"
      decimals="4"
      id="h_531_a72f63bc_5ec2_4c6e_a0b7_ce2377d4f163"
      unitRef="pure">0.0218</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_20_c7106faf_2337_48fe_f8d2_95cb58a5b92a">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_532_4d198e94_648f_4ae5_9feb_fc9e6e9f6cfe"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_533_7c941fcf_ca25_472f_89bb_ea5929e33abf"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_534_cdb5f877_f5cd_4746_bcbf_14f2d0239c62"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183878Member"
      id="t_13_18309cc1_3ff3_3e9e_f285_e45ce459c23a">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_14_d50f85c3_7b78_653c_ef95_de2c604656db">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_15_dc0e4728_4b8e_7aa3_a079_13a0f805a8c7">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_16_14cf6206_8905_919c_6d0b_f109f5adfdc0">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183878Member"
      decimals="INF"
      id="h_535_1b919e54_5663_4342_bf51_46ed6c5b4334"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183878Member"
      decimals="INF"
      id="h_536_d2ac74d5_8be5_41d3_b992_c644937bd178"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183878Member"
      decimals="INF"
      id="h_537_ec99294d_c0d5_45ac_a5f6_00a191a6ef3e"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183878Member"
      decimals="4"
      id="h_538_eb67cd7e_2db9_4ed4_b761_936808efc0dd"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_17_3763b19e_bc3e_fb8b_7398_5fba5205282b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274521.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183878Member"
      id="t_18_4f0b2b60_c8a5_e99a_8db1_aacb77f1cb8a">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_539_22df1c71_7484_434a_9c30_0f4b55b90a99"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_540_2e48462e_ff27_4eef_aa86_79d46b8ee387"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_541_aad061b4_ccb1_4d7b_8bd4_086b876170f1"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_542_afb51edb_9c6e_41ea_99a2_5dbb52fef9cf"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_AIAGroupLtdMember"
      decimals="4"
      id="h_543_a8da17e7_5977_4a0b_b551_85d34aa6ffe7"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_CommonStockMember"
      decimals="4"
      id="h_544_ca9b79e4_6204_4945_a789_c86430181075"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_PreferredStockMember"
      decimals="4"
      id="h_545_e55fcee5_f5ae_4e87_9e3e_f986abf224bd"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_PrivatePlacementsMember"
      decimals="4"
      id="h_546_56967a5f_e990_4b37_8f66_eb9eb0e46011"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183878Member_OtherInvestmentsMember"
      decimals="4"
      id="h_547_d339c6cf_b431_4159_bcd7_e5d8567f8830"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183880Member"
      id="t_1_c0dbf626_a8f4_12d0_526b_be89a195896c">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183880Member"
      id="t_20_e44c0630_4e0d_880f_1693_ee8a68e38b0e">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183880Member"
      id="t_18_29664b43_22da_e10c_69f0_185dcbdecbe5">HEMSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_2_b3ba72f3_567e_a7cd_0955_4fc59cd2877b">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183880Member"
      id="t_4_f6d7291a_2fc8_e2e3_3527_3c5e75eacb7a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_3_05dc7806_1479_a320_3511_3a3563014238">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183880Member"
      id="t_5_264302ec_8883_b7c0_61cb_c797630e4370">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183880Member"
      id="t_6_ec015ca6_58f5_6076_9923_f88d2044ec25">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_7_bb883e11_7108_2cb5_a102_a06a8d44c723">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class S Shares/HEMSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;168&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      contextRef="FY2024_C000183880Member"
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      id="h_548_0b4e5ac8_1dea_47df_8c04_6e2809f05a8a"
      unitRef="USD">168</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183880Member"
      decimals="4"
      id="h_549_aa25d6a3_019d_4765_9e9f_c4a1d34d1d5a"
      unitRef="pure">0.0155</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_23_1743b7dc_e707_c04d_bd40_a66febf2887c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class S Shares returned 16.80%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274550.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class S Shares/HEMSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183880Member"
      id="t_15_6776e417_81fc_f9f5_ca6b_2947fbd90f5f">Janus Henderson Emerging Markets Fund (Class S Shares/HEMSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183880Member"
      decimals="4"
      id="h_550_e6e69ec8_5d94_452a_a0b8_3cd3d0af7ba0"
      unitRef="pure">0.1680</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183880Member"
      decimals="4"
      id="h_551_50261123_4226_4134_9fa3_d074b051af3a"
      unitRef="pure">0.0328</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183880Member"
      decimals="4"
      id="h_552_453a2474_4805_414d_841e_875e2de4fd66"
      unitRef="pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_16_94cb4c45_6815_e7b5_c3df_180eff0b5e19">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_553_415b2d3e_5be8_4a19_836e_9a2af8e5c550"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_554_cc05048a_2c61_42bc_baa6_ede0f1e54bd6"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_555_b487f702_7e58_4d71_87d1_3c5e1260f3e5"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183880Member"
      id="t_8_14d446ad_b3d2_dcf0_890f_b5caca771a6d">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_9_10c56055_a9ed_1172_f07f_5710d345a7a4">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_10_ba2ef55d_7c16_bdba_988c_d19ead56d06c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_12_faf78bcc_0095_d4d8_18a1_7609e292f46c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183880Member"
      decimals="INF"
      id="h_556_9b5fa5b6_4070_494a_8770_c63dfc6f3eae"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183880Member"
      decimals="INF"
      id="h_557_52d71b52_51a7_4295_bad3_92d3c479b3f3"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183880Member"
      decimals="INF"
      id="h_558_41274f1c_346c_4327_b232_b2cb3f55a51a"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183880Member"
      decimals="4"
      id="h_559_01f53b1b_40aa_4a5b_9b98_9759cadf8b39"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_13_935ee8c3_0215_b46e_b4f7_3d968a6c6840">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274560.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183880Member"
      id="t_14_3aed37df_a1de_0eb7_3a6a_0376d59cb366">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_560_3e9f0db0_fa3a_4c0d_96b4_691a1384e43b"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_561_fde380a4_b8f0_48e6_be8f_14bb2c2ddb90"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_562_c1aaa8ba_2fd8_4fe0_90ea_5daaf19a5746"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_563_e59993d3_8546_4c79_aba0_ef8cce49cf56"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_AIAGroupLtdMember"
      decimals="4"
      id="h_564_b80cfdfc_2894_419a_b0ab_c5067d018770"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_CommonStockMember"
      decimals="4"
      id="h_565_0881f504_abce_4892_856d_eb3a05b9a029"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_PreferredStockMember"
      decimals="4"
      id="h_566_d1b6eb24_5917_4206_adf9_c78ec444b292"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_PrivatePlacementsMember"
      decimals="4"
      id="h_567_6bf755ab_6281_4b3c_8357_4ab1754e78db"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183880Member_OtherInvestmentsMember"
      decimals="4"
      id="h_568_0f59e496_f08c_4219_9f0c_159d563c1111"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183881Member"
      id="t_1_f5cfd28a_b0cf_aa74_99d1_00b6bbb83b23">Janus Henderson Emerging Markets Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183881Member"
      id="t_2_8a27d0bb_4f52_0a2e_e1d5_f5da508c44c3">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183881Member"
      id="t_3_895bdff7_4348_45cb_5cab_bb3a25375674">HEMTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_4_4c8c5d79_1d02_eaa7_1c0d_8fa32754152b">This annual shareholder report contains important information about the Janus Henderson Emerging Markets Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183881Member"
      id="t_6_eb5263af_820f_df4d_3116_a2371997a00e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_5_b4a80c26_f88f_e915_8dff_7d85ad7d10b7">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183881Member"
      id="t_7_38e1b3af_4c2e_4c78_a080_523a6554455e">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183881Member"
      id="t_8_10ec851f_20d2_ac29_e1c6_d751ca8ea170">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_9_70fd3bc5_07ba_b5ba_8fda_8168b2ade139">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund&lt;br/&gt;(Class T Shares/HEMTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;139&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183881Member"
      decimals="INF"
      id="h_569_ef7a9858_7013_4207_b768_77f8cf435a14"
      unitRef="USD">139</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183881Member"
      decimals="4"
      id="h_570_96d5f1a7_0747_4514_9fce_6be1823df79f"
      unitRef="pure">0.0128</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_21_9efe5fe9_e339_2302_99dd_2e85bbee5418">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Emerging Markets Fund Class T Shares returned 17.05%. Its broad-based benchmark, the MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;, returned 26.05%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Several Fund holdings in India contributed to returns relative to the benchmark. Online travel agent MakeMyTrip, a top relative contributor, gained market share and strengthened profit margins as it capitalized on accelerating travel spending by higher-income Indian consumers. Bharti Airtel, another contributor, benefited from its strong competitive positioning as one of two major carriers in India&#x2019;s telecommunications market.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsung Electronics detracted from returns relative to the benchmark. The South Korea-based global electronics and semiconductor manufacturer faced competitive challenges and uncertainty around the near-term outlook for semiconductor sales. ZJLD Group was another detractor. Worries over the pace of consumer spending in China pressured the beverage company&#x2019;s shares despite its brand strength in the baijiu liquor market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_20_6033a695_029d_1d44_c49d_e616d5883779">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274589.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_10_1a07da56_b754_41df_c338_ea1a1f024412">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Emerging Markets Fund (Class T Shares/HEMTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Emerging Markets Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183881Member"
      id="t_17_5695caf6_0d9f_6b7b_753c_5942abef71b0">Janus Henderson Emerging Markets Fund (Class T Shares/HEMTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183881Member"
      decimals="4"
      id="h_571_a67ac5a6_a68b_45eb_8962_1e091972ae12"
      unitRef="pure">0.1705</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183881Member"
      decimals="4"
      id="h_572_331047a2_9df7_4ef0_97cd_c060e4689a84"
      unitRef="pure">0.0352</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183881Member"
      decimals="4"
      id="h_573_0126104c_a77a_4549_86cb_9f68a7e20708"
      unitRef="pure">0.0194</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      id="t_18_b3fd4ae7_a448_fe86_d23f_799ee3622e43">MSCI Emerging Markets IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_574_56524d6c_4fea_4b29_8e6b_8b326701e52f"
      unitRef="pure">0.2605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_575_26fd0dfc_af06_4275_adad_145abfeecfc8"
      unitRef="pure">0.0575</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEmergingMarketsIndexSMMember"
      decimals="4"
      id="h_576_eefed376_f9d2_4bba_a21a_7b69f645d52e"
      unitRef="pure">0.0402</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183881Member"
      id="t_11_eb1ae1a4_331c_467c_6c6d_e6c391a0bb19">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_12_396853b5_f59e_6f02_27ed_feb5c8b0ffb7">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_13_42573167_0cc5_1a19_14d6_dde5092fceff">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_14_a9ece484_71b1_52a6_3ffa_65f7605e9068">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;59&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183881Member"
      decimals="INF"
      id="h_577_1d380192_c7d6_4d68_8ca3_a2973a9bba9a"
      unitRef="USD">32000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183881Member"
      decimals="INF"
      id="h_578_477ee552_490e_4f94_a5fd_b980e03e500a"
      unitRef="Holding">59</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183881Member"
      decimals="INF"
      id="h_579_dfe7d33b_9153_4cdd_bfe0_4139ec8a038b"
      unitRef="USD">100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183881Member"
      decimals="4"
      id="h_580_9918be37_9630_4788_90aa_afb33333e631"
      unitRef="pure">0.64</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_15_de27a916_f30d_bb05_ab39_6812738293d6">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.6&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274599.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183881Member"
      id="t_16_729ce35c_717d_ada7_670a_9044c97af42f">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Samsung Electronics Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Tencent Holdings Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Bharti Airtel Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AIA Group Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_581_a2779e79_d961_4627_9dbc_cf133c722ada"
      unitRef="pure">0.099</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_SamsungElectronicsCoLtdMember"
      decimals="4"
      id="h_582_4178506d_c9f1_4612_9bd5_e29537d64e71"
      unitRef="pure">0.067</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_TencentHoldingsLtdMember"
      decimals="4"
      id="h_583_70f67719_c4a4_4661_a4a8_1fe31c6bb12c"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_BhartiAirtelLtdMember"
      decimals="4"
      id="h_584_96f15cc5_5683_4c4f_833d_580730e2467e"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_AIAGroupLtdMember"
      decimals="4"
      id="h_585_8bd97e9c_cae2_41bf_bcc9_4ce330105521"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_CommonStockMember"
      decimals="4"
      id="h_586_98e56e16_e985_4d84_804e_dffaf928e305"
      unitRef="pure">0.985</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_PreferredStockMember"
      decimals="4"
      id="h_587_392d20dc_2dde_4d6f_8838_dc7d20d336b2"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_PrivatePlacementsMember"
      decimals="4"
      id="h_588_1d1b961f_9749_4a25_a421_e1d5889a9aaa"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183881Member_OtherInvestmentsMember"
      decimals="4"
      id="h_589_96fdd1b9_9354_4af0_b636_0060df447fb6"
      unitRef="pure">-0.006</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077737Member"
      id="t_1_55ccc63b_d7e7_4fac_6892_9140a2a379b3">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077737Member"
      id="t_2_ed316500_912f_44a9_b01f_6ccf630c41c1">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077737Member"
      id="t_3_009a8fd6_f0eb_2f66_24eb_c6a17f79cf1d">JDMAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_4_d794feb9_d8f5_f174_652d_2a3673d79b9f">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077737Member"
      id="t_6_a8720fd6_a9eb_c92b_084a_153c217809f0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_5_ebb3d65e_b724_49cf_8d60_364183d4800c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077737Member"
      id="t_7_3921cc9a_f15e_05ca_a5cf_2bb671e9f67a">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077737Member"
      id="t_8_edeb2303_e26e_f873_e4cd_19bba292cd81">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_9_347250f5_3638_c83d_e011_eac22900c7c2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class A Shares/JDMAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;125&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077737Member"
      decimals="INF"
      id="h_590_bf3022c2_9cbe_45ba_8ee1_11821238b222"
      unitRef="USD">125</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077737Member"
      decimals="4"
      id="h_591_e0b15f1a_c0a6_42db_b34e_30b5c7d75b36"
      unitRef="pure">0.0111</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_23_4bf9c34d_6bef_5ea6_2b14_39fbfd0dd1f8">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class A Shares returned 25.74%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278294.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_12_f6347c11_f903_6d06_0aa3_1bf7841a5bc8">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class A Shares/JDMAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class A Shares/JDMAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.51&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077737Member_WithoutSalesLoadMember"
      id="t_19_06bf13cd_a696_b31a_5b36_c768fc3af636">Janus Henderson Enterprise Fund (Class A Shares/JDMAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077737Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_592_18cfb057_be56_4dae_bd41_8284cdd86226"
      unitRef="pure">0.2574</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077737Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_593_1e269656_e3a0_4aae_9eb3_f5e0787286c7"
      unitRef="pure">0.1095</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077737Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_594_14900740_7723_4a92_93b9_f12e6e416387"
      unitRef="pure">0.1269</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077737Member"
      id="t_20_76abfbfb_a021_236e_37ee_b3cae2347019">Janus Henderson Enterprise Fund (Class A Shares/JDMAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077737Member"
      decimals="4"
      id="h_595_bbc9f7cf_41bc_4a1d_8fd4_1a6d77bd94d7"
      unitRef="pure">0.1851</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077737Member"
      decimals="4"
      id="h_596_f62979fe_809a_48ea_ac35_7b1b224f73bc"
      unitRef="pure">0.0965</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077737Member"
      decimals="4"
      id="h_597_ab377099_3f40_4f3b_a292_65ed9a7d1869"
      unitRef="pure">0.1203</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_21_112e9005_e5e9_a8d9_904d_855ad25ff99c">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_598_8108446a_9335_41de_b74d_c0b9be6d6704"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_599_40ae78a8_bcb2_4850_99ee_c98f4ff9be89"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_600_edec770e_4042_4864_b515_58da4fe91fab"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_22_c6d66496_2c20_673a_ad88_df1a45977f70">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_601_d17ee9e0_c4b7_499b_8bb0_bffb9ee533ca"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_602_95e38e17_1a9e_43c6_9275_081c4152224d"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_603_253b0e75_5c46_4036_9513_00971c73d74d"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077737Member"
      id="t_13_fb057c3c_8358_d720_a164_8d87e9c77231">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_14_4c0a0241_c638_b06e_d760_636fa1159dc8">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_15_a0125f46_5d44_0be2_4282_9b8e38e09ceb">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_16_ffb9e68b_98f6_e87c_523d_b38a0d851811">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077737Member"
      decimals="INF"
      id="h_604_f5158495_4229_4158_85eb_e271f26e6ce1"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077737Member"
      decimals="INF"
      id="h_605_e6d5a1fe_f3c3_4b9d_af2d_2a54ee062099"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077737Member"
      decimals="INF"
      id="h_606_dfd527a6_faaa_445d_b6cf_da8a6773025b"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077737Member"
      decimals="4"
      id="h_607_2fdeaf72_9da8_4cd1_9226_39ca6803066f"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_17_7a65e56d_df6d_420f_35a3_756a5da765b8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278304.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077737Member"
      id="t_18_3643a6ca_9ee9_1ab7_624d_d29f0ba0f1f8">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_ConstellationSoftwareIncCanadaMember"
      decimals="4"
      id="h_608_8a8d5267_1694_47a8_91d9_4da643ffb2f6"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_GoDaddyIncMember"
      decimals="4"
      id="h_609_63bd6639_7a4a_45d9_a6db_365c0efef59b"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_610_10c0cf3e_bd1a_44d1_a0d6_75ceb3ce035e"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_TeleflexIncMember"
      decimals="4"
      id="h_611_f259bc93_054d_4356_99e7_1508ea2d4785"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_BostonScientificCorpMember"
      decimals="4"
      id="h_612_736ae08d_0775_4ca9_825f_a27694807c6f"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_CommonStockMember"
      decimals="4"
      id="h_613_d6d02923_689b_4694_86ec_300a4bc1144c"
      unitRef="pure">0.954</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_614_8654b65e_fc4b_42ae_9440_b43c2a754a80"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_615_32a77089_c362_4714_b5a8_0dd9cbfd80b6"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077737Member_OtherInvestmentsMember"
      decimals="4"
      id="h_616_9459374e_c99f_486a_a90d_eb22ace9e5a2"
      unitRef="pure">-0.004</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077738Member"
      id="t_1_6c553179_ed69_1c9f_a491_1de28ec190f3">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077738Member"
      id="t_2_8af92320_a4ec_d529_f1d4_9ac345de8287">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077738Member"
      id="t_3_06f18ad8_7411_9ecd_8d7f_205005ed3293">JGRCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_5_449ec5db_8b22_4de1_6de7_33774de67972">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077738Member"
      id="t_4_57a31b75_fbb2_fa89_efb4_408105cf6bfc">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_6_3abd972c_b688_c8cf_70d9_6f479e404be7">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077738Member"
      id="t_7_a3af6742_f143_3ff6_9dad_0caead00c643">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077738Member"
      id="t_8_151c3c38_811b_8bec_b633_5d3153cd41f9">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_9_a9d0c4b8_8f4e_31d7_a5ba_f7481c0418ce">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class C Shares/JGRCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;182&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077738Member"
      decimals="INF"
      id="h_617_e21ed8aa_f043_4103_ad6c_888170a5b039"
      unitRef="USD">182</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077738Member"
      decimals="4"
      id="h_618_6e59ba73_06cd_437f_911f_0262f996afab"
      unitRef="pure">0.0162</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_23_3e43feb7_3968_1554_3625_1d254837523a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class C Shares returned 25.12%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_11_8346ca1f_977b_b31c_036e_699ed8280cd7">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278333.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_12_2b0308bf_c46d_0a7f_c5db_9bf6d8529163">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class C Shares/JGRCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class C Shares/JGRCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.12&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077738Member_WithoutSalesLoadMember"
      id="t_19_a127006d_2f08_c585_1a41_3f894f214533">Janus Henderson Enterprise Fund (Class C Shares/JGRCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077738Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_619_fa4286f6_a9e2_4fd3_b57f_3493873a6a4d"
      unitRef="pure">0.2512</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077738Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_620_9445b2ec_d64f_469b_8fbd_9ddd213435d8"
      unitRef="pure">0.1037</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077738Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_621_099a214d_f033_4eb3_b303_8ffd0106f13e"
      unitRef="pure">0.1205</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077738Member"
      id="t_20_05c9f5a3_2ce9_62a5_d550_734d8326a12d">Janus Henderson Enterprise Fund (Class C Shares/JGRCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077738Member"
      decimals="4"
      id="h_622_17e2d92f_d539_47bd_bb28_a6e51c662d1a"
      unitRef="pure">0.2412</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077738Member"
      decimals="4"
      id="h_623_2eefaaf6_86f4_4531_93f2_48c54a587d00"
      unitRef="pure">0.1037</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077738Member"
      decimals="4"
      id="h_624_42bf7730_f32f_4fc1_aef3_2af09a32952b"
      unitRef="pure">0.1205</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_21_e547d442_3743_bd18_646d_eaad9ce5416d">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_625_1936c6bc_5bd3_4629_9147_d131fc61b7e6"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_626_c76c6501_8fe0_4508_8e1e_fe6203487449"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_627_867e2aba_aee9_468d_ba99_0a72e8c75ed5"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_22_c145d671_7022_5ca8_cf8e_ebccd1649478">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_628_d3cf2200_6a25_4a6b_9ffe_3e5c0f189ad7"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_629_170925d4_eba6_416c_bfde_473d179a4fac"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_630_f3c7ee16_ce78_4d66_9071_81df4bcb5851"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077738Member"
      id="t_13_991fa687_9fbf_c727_a482_405a56150f46">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_14_f4be0dbe_74ca_142d_f056_66dcb9b7cffb">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_15_7378573d_6030_6234_4b1a_ae17aa356893">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_16_4a23c32d_e9df_1cb3_0e87_df0712338b68">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077738Member"
      decimals="INF"
      id="h_631_0ca2adfc_febc_4821_b926_833506ea72a2"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077738Member"
      decimals="INF"
      id="h_632_a409776f_62e3_4cbe_ba8b_541c7b33f91b"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077738Member"
      decimals="INF"
      id="h_633_c7ad0255_4d66_4fee_ac4d_d00e30a503b1"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077738Member"
      decimals="4"
      id="h_634_fe93ad54_d87a_4aee_8c57_5e21aed3e0c0"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_17_2a7a5c8b_f3f3_f924_03f5_24ced30f317f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278343.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077738Member"
      id="t_18_d0cd0580_efba_3207_a8a9_7c5f5283add2">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077738Member_ConstellationSoftwareIncCanadaMember"
      decimals="4"
      id="h_635_d567da33_9b2f_45de_8185_3d053634aead"
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      contextRef="TI20240930_C000077738Member_GoDaddyIncMember"
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      id="h_636_2d356252_62cf_4c53_bee0_6ca3e0da1906"
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      decimals="4"
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      unitRef="pure">0.031</oef:PctOfNav>
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      unitRef="pure">0.029</oef:PctOfNav>
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      decimals="4"
      id="h_640_c9df9305_df11_4e94_9091_bfba034fc48a"
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      decimals="4"
      id="h_641_bdefbad9_d395_4e7b_8a8b_c89b5bbb87e4"
      unitRef="pure">0.047</oef:PctOfNav>
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      contextRef="TI20240930_C000077738Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_642_b99ea404_1872_409d_80ab_8fd140b70b51"
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      contextRef="TI20240930_C000077738Member_OtherInvestmentsMember"
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    <oef:FundName
      contextRef="FY2024_C000083535Member"
      id="t_1_dfd4119b_c698_d32e_73f2_8249773cf80a">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083535Member"
      id="t_2_dc344a59_ff9f_d819_b86b_8948b71c23c8">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083535Member"
      id="t_3_8d2fe881_df56_da4c_2344_3b6180315fad">JANEX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_5_b5b6dfbb_e945_ef91_a9ad_02e353f7be0d">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083535Member"
      id="t_4_0032793e_47e1_c792_c33c_bf2cbe043584">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000083535Member"
      id="t_6_918fb337_7cd2_4b7e_da6c_d5babc07bc0b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083535Member"
      id="t_7_7c2b0648_dc3a_d1f6_a233_2b1df6c6a1a2">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083535Member"
      id="t_8_51cf4608_8669_a79f_0a4e_17d7af89b859">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_9_23ae3f4e_6463_c256_386b_9af44bde736b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class D Shares/JANEX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;89&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083535Member"
      decimals="INF"
      id="h_644_4b2a7379_e626_43c8_b265_13f7fce56d35"
      unitRef="USD">89</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083535Member"
      decimals="4"
      id="h_645_5bc5d29c_5ccf_4ea6_b148_93b22313c9c6"
      unitRef="pure">0.0079</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_22_73870a93_7623_d1ec_ca59_c808ddb5be5e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class D Shares returned 26.15%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278372.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_21_7c4ea38e_9765_d095_0dfc_83a36d8aabb2">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class D Shares/JANEX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083535Member"
      id="t_18_aeda0c80_dc8a_5148_7ed3_59ff0cbb0a34">Janus Henderson Enterprise Fund (Class D Shares/JANEX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083535Member"
      decimals="4"
      id="h_646_eb961890_0aba_4f2d_8583_3a25d1aa2933"
      unitRef="pure">0.2615</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083535Member"
      decimals="4"
      id="h_647_31a203e1_c3ca_40d8_8092_7f11b7d8014e"
      unitRef="pure">0.1131</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000083535Member"
      decimals="4"
      id="h_648_ad29bb0a_42a5_4007_9ca7_2964521b176e"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_19_c5bb6625_d83f_ea1d_9323_e6e5fdcc806f">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_649_54fce6f5_a4bb_423c_81ca_d321a359b6cf"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_650_8814b115_4d13_4f82_8b8e_37ce06a53544"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_651_58f64bd3_4ff0_4426_83be_44038ed1b9f7"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_20_097637d2_d4b9_a2d2_e670_9c52a420ab99">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_652_00dfae35_ac33_4740_93ea_eb7e0e38a2ff"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_653_1cefb059_589a_407e_86f2_82729fc3fc0f"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_654_14b4e70c_6753_4d8b_9c53_c4edb950f852"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083535Member"
      id="t_12_381752cd_e4c7_edc1_92d7_aa931cdeaac9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_13_36aaf8e3_e28e_668e_e59a_b83beec8dd77">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_14_a746597c_b6af_4e82_fc3d_e5326fdc8217">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_15_f0ad7b2c_9f25_2aea_3343_897f2f883ae6">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083535Member"
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      unitRef="USD">22784000000</us-gaap:AssetsNet>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278382.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083535Member"
      id="t_16_58f163ac_8f3e_9959_2f16_d5c01bc532d1">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_ConstellationSoftwareIncCanadaMember"
      decimals="4"
      id="h_659_46e7c11f_11ab_4e05_a5e9_0ae8f858bbe3"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_GoDaddyIncMember"
      decimals="4"
      id="h_660_dd764bcf_a4eb_46d7_b0e8_636c4de08300"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_661_21c9b958_2aca_4152_8c54_c0ac9a44c227"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_TeleflexIncMember"
      decimals="4"
      id="h_662_09af17cb_ff5b_4874_9367_048a9be425d0"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_BostonScientificCorpMember"
      decimals="4"
      id="h_663_a9ce3536_bae0_4ab3_9cd5_d90e442c89d1"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_CommonStockMember"
      decimals="4"
      id="h_664_cb9d5ddd_5a1c_4ac9_8124_dcd84d0cc2c7"
      unitRef="pure">0.954</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_665_df09eb53_3e99_46b8_8200_e9e50b03237a"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_666_78985cb4_c94a_4a69_b0e5_9d80c1f0ba1f"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083535Member_OtherInvestmentsMember"
      decimals="4"
      id="h_667_2451b9d3_78ff_4fc2_8ef5_ced6a437cabe"
      unitRef="pure">-0.004</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077739Member"
      id="t_1_e656c5f4_51d7_b322_19fd_2304993cdce7">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077739Member"
      id="t_2_3ff8fa00_64f8_2c67_68c4_1ad2aeabf2ca">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077739Member"
      id="t_3_a2e139bd_25bf_1306_b6cf_be8be47c7f97">JMGRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_4_e8b83854_1ea2_326a_93cf_136c7f1f2bbc">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077739Member"
      id="t_5_9555ed03_ea34_1407_92ec_dd9cf21ed6f7">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_6_9284fcad_27f1_7c6e_2ce4_6cd6da416944">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077739Member"
      id="t_7_6eb195c5_4c1d_51d4_c432_a4eac4aaf969">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077739Member"
      id="t_8_04894687_a0d0_0b1a_9ac7_42931b1df442">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_9_bc7079fb_4f31_40f2_8082_6631accb9089">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class I Shares/JMGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;86&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077739Member"
      decimals="INF"
      id="h_668_07af8670_ad4f_4958_9b07_ea6ff5741d09"
      unitRef="USD">86</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077739Member"
      decimals="4"
      id="h_669_0de0101d_79cb_430e_9555_a4b02fe8e2f5"
      unitRef="pure">0.0076</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_22_fec4be76_d6c7_6286_a892_b5f03c827785">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class I Shares returned 26.18%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077739Member"
      id="t_11_8d945ff4_dd91_b233_a8e5_7e6cd2e75007">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278411.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      contextRef="FY2024_C000077739Member"
      id="t_12_6966dd05_9f09_5a94_f8d9_6783d9ffae22">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class I Shares/JMGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077739Member"
      id="t_17_db131e0b_959f_7b3d_9649_27e09989dd47">Janus Henderson Enterprise Fund (Class I Shares/JMGRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077739Member"
      decimals="4"
      id="h_670_3f3686dd_c2db_4659_8925_399bf526a56c"
      unitRef="pure">0.2618</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077739Member"
      decimals="4"
      id="h_671_ee53e51c_311d_4c9f_86d8_ac6a5c04416c"
      unitRef="pure">0.1135</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077739Member"
      decimals="4"
      id="h_672_a4eabcfc_9aa9_4aae_91bf_16e48f3840fc"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_18_c42d3923_c5dd_0a6f_a05e_564bac4ca1f4">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_673_7a409e8c_15bd_43cd_a51e_d1d29c0de5e4"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_674_bb77f154_9040_496e_974f_94425d459c01"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_675_46843d94_50de_4fd1_84bc_6f06d8c9017b"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_19_a0c45369_3fcd_91df_0dee_32a6c71a19f8">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_676_95f01359_bcc6_4e86_a6f9_56c675cffdbf"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_677_864a6996_4fad_4417_b5d0_7883d1401d42"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_678_91e3d84b_7bab_4809_b268_d7e1257b62f2"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077739Member"
      id="t_13_162d27ab_5079_7fe1_3ec3_a8bd678e8a0a">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_14_8d4b9ea1_4fc4_1b6b_387e_61cdf483b666">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_15_53a9b0d2_d111_e244_f7b0_6dfa89469116">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_16_31410fd1_04f4_2c9a_a3d7_4097f0ca6a24">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077739Member"
      decimals="INF"
      id="h_679_3561ba1b_efe9_4ac0_af98_10b04e8589c6"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077739Member"
      decimals="INF"
      id="h_680_6998cc4b_b9a0_45af_9fce_83b3aae3068c"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077739Member"
      decimals="INF"
      id="h_681_9dfd1633_86aa_4319_a6fb_4a94af7abc5b"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077739Member"
      decimals="4"
      id="h_682_d3c37c81_add2_430d_967e_1c507af9e6b4"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_20_a4a3644a_4d43_3d94_2a7e_f13757a4b49b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278421.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077739Member"
      id="t_21_77e016d8_55af_92b3_6cfc_a569e1a7a571">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
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      id="h_687_e2de6963_817b_49f0_9444_69865c411712"
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    <oef:FundName
      contextRef="FY2024_C000114883Member"
      id="t_1_c77c8036_aa03_e8cf_c3c5_da483ccbeaf2">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114883Member"
      id="t_2_74e46340_9575_47d9_5a8f_d015442f855a">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
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      id="t_3_49dc4660_e159_2971_4c77_bfc7cf7e2d12">JDMNX</dei:TradingSymbol>
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      contextRef="FY2024_C000114883Member"
      id="t_5_1d158dfa_f2bb_1bb4_5421_ce2ddc1ffbef">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114883Member"
      id="t_4_7f2c2013_a86f_6451_03ac_cc967343dfc1">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000114883Member"
      id="t_8_f71559e5_e6cf_6b0c_73a3_2068b47abd2b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114883Member"
      id="t_6_0961683e_6a07_bd22_286b_110873328713">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114883Member"
      id="t_7_ec5bbfe6_0d8f_ffe9_7849_3822c16f1602">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class N Shares/JDMNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      contextRef="FY2024_C000114883Member"
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      id="h_692_32f0766b_f71a_4dcb_a800_f03cd958cb15"
      unitRef="USD">75</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114883Member"
      decimals="4"
      id="h_693_6a38734d_b362_432d_a36b_fb8c933ea222"
      unitRef="pure">0.0066</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114883Member"
      id="t_22_f55d2414_2291_b756_17fa_5366c7499ee0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class N Shares returned 26.32%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278450.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114883Member"
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class N Shares/JDMNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2632</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_695_0ed615f5_215c_41b2_9797_6cd13305a945"
      unitRef="pure">0.1146</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1321</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
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      id="h_697_7cb0a3a0_7940_4b95_8834_2e4d282429ff"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_18_1c49f153_bdea_f1ef_a62f_8bc184154bbd">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_700_46f1e102_4b96_4ee7_bb34_0124401090ad"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_701_6d2b52ae_002b_4f85_87e0_92800ff28671"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_702_37c6de12_9f00_437a_834c_71e913a86f7a"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114883Member"
      id="t_14_41f39c3c_3eb1_779a_1de5_53bf888667c3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114883Member"
      id="t_15_73f9f7e0_c798_edd2_de5a_edf04524af07">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000114883Member"
      id="t_19_818c13cb_4baf_777d_153a_2f329406f2da">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114883Member"
      decimals="INF"
      id="h_703_07ff4afe_4574_4b7c_9453_efd632e6a32b"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114883Member"
      decimals="INF"
      id="h_704_766c0d0a_0552_4d8c_8186_169fddcb1297"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114883Member"
      decimals="INF"
      id="h_705_b6973b42_4ef4_44f7_8c7a_32e51b626eb1"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114883Member"
      decimals="4"
      id="h_706_d74efd91_a2d3_4dda_985b_e162a04cfbdc"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114883Member"
      id="t_20_5d4c6aaa_480b_2b25_719d_900ad075f856">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278460.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114883Member"
      id="t_21_b1ded103_ed99_c31f_ff71_50591ae90bee">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_ConstellationSoftwareIncCanadaMember"
      decimals="4"
      id="h_707_95429642_54c5_4268_a5e3_9ed2c12eb3e5"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_GoDaddyIncMember"
      decimals="4"
      id="h_708_efb5580d_6248_46a9_bafc_be7836418b3c"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_709_5659600e_abda_4337_8a49_a3a54a85fc51"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_TeleflexIncMember"
      decimals="4"
      id="h_710_dff0eb46_53bd_4eb3_bda5_08da9b433c3c"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_BostonScientificCorpMember"
      decimals="4"
      id="h_711_70284723_c91c_4e04_9730_6e551a3ed68e"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_CommonStockMember"
      decimals="4"
      id="h_712_cd6d24d5_1b1a_4e42_bc74_3e41af4b6ef6"
      unitRef="pure">0.954</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_713_003377ff_b520_4073_8cb6_acf399510949"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_714_dfa3062b_fd41_42ff_97a3_87dacd2ae653"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114883Member_OtherInvestmentsMember"
      decimals="4"
      id="h_715_68a2eafe_2d7c_48b3_901c_6a50ddf2f9d4"
      unitRef="pure">-0.004</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077740Member"
      id="t_1_105a0da5_fd01_dd8c_b4df_e3d7996a0177">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077740Member"
      id="t_21_5344070f_6aa2_c160_c3c1_f19ad544128b">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077740Member"
      id="t_22_2fc893a4_ce53_fb0e_68e6_a10bfc6fc086">JDMRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_3_61369611_5e1b_8718_8ef1_3842730444d0">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077740Member"
      id="t_4_524b3003_b8d6_30ae_9752_d07a26919db4">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_5_3042f417_ba19_9246_f9cd_9d83dfd1134b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077740Member"
      id="t_6_a310555d_1e8f_f0bc_10dd_ccf69690762b">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077740Member"
      id="t_7_f7e1de7a_8361_5e10_8188_5e08b0bbb284">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_8_ec5fc81a_a030_52c4_3e68_583775a8be60">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class R Shares/JDMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;158&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077740Member"
      decimals="INF"
      id="h_716_21553cd1_9e2a_43d8_bd5e_a0889c82429d"
      unitRef="USD">158</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077740Member"
      decimals="4"
      id="h_717_df3813f0_217a_4b42_804b_f3cea358f769"
      unitRef="pure">0.0140</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_23_e653e85d_6108_df02_4d87_65c04e09c5df">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class R Shares returned 25.38%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278489.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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      id="t_11_d5dfdc39_7bb9_1031_4187_119e8138c3fe">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class R Shares/JDMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077740Member"
      id="t_18_a6a9dbbb_2ff8_1409_2406_ff6ec71f9dfd">Janus Henderson Enterprise Fund (Class R Shares/JDMRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077740Member"
      decimals="4"
      id="h_718_caa3ca92_fc0a_4f49_bcd8_fbc93727ad04"
      unitRef="pure">0.2538</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077740Member"
      decimals="4"
      id="h_719_ac562c8f_2943_4035_ac6e_8f4b8ad3f9c7"
      unitRef="pure">0.1063</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077740Member"
      decimals="4"
      id="h_720_5ffc5624_7207_44fd_a0d7_9e6bd0e9b1f7"
      unitRef="pure">0.1237</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_19_23a3271c_9983_7828_0ebf_dca6ffc32516">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_721_54feb364_f0ed_4596_864a_3db953aa3e07"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_722_897072b0_539c_4005_9493_b8eb8979ea15"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_723_6c360b72_8ea9_4df2_b8c9_b48f19a9c8e2"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_20_a56ab8f6_599a_ed89_6f63_d216669dc7ff">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_724_c4a4da1a_d307_427b_b5ed_2bfea73ba66c"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_725_c68504dc_6b64_4ffc_98b8_b416e9f085fa"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_726_4965df91_ef07_4a76_9a8b_6c10e5fa93f8"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077740Member"
      id="t_12_7480ebd7_1f29_b20b_482b_7af25042618c">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_13_2f097e42_4b43_be4a_dbe6_f4169309da73">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_14_d68c15a4_41ac_7a93_973a_ef8269b0cbe1">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_15_c0fd77dd_197c_5105_7efe_9c97a7d1e165">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077740Member"
      decimals="INF"
      id="h_727_313d7d3b_7709_403a_ace6_1b1e1f5b9de0"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077740Member"
      decimals="INF"
      id="h_728_651247f1_3a5c_405e_9b55_21784f652804"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077740Member"
      decimals="INF"
      id="h_729_5d13674f_193c_437b_b9ff_5213d3034d18"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077740Member"
      decimals="4"
      id="h_730_65df76e3_a1e4_4c4f_9f04_e14795fe901d"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077740Member"
      id="t_16_09d16da1_10eb_6d25_9cc0_35f61e4bb348">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278499.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
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      contextRef="FY2024_C000077740Member"
      id="t_17_bd18a804_a687_730e_316f_e3f13cafa836">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:PctOfNav
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      id="h_731_9601d3d5_3eae_42f7_b2fb_dbb31f4831be"
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      id="h_732_f3ca6bf0_62fa_4964_849b_367e95d1f8d5"
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      contextRef="TI20240930_C000077740Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_733_47896eb1_6a3e_4e69_810f_75302c9761af"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077740Member_TeleflexIncMember"
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      id="h_734_de337c3f_e220_4c3d_bedb_6faf557011aa"
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      id="h_735_e1a6e002_309e_4c24_93b2_2ba2c95593ce"
      unitRef="pure">0.029</oef:PctOfNav>
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      decimals="4"
      id="h_736_6c06efe6_5b76_4277_9400_48626daf6b7e"
      unitRef="pure">0.954</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077740Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_737_5d611684_0610_48ca_aaf8_c57c8ea4e992"
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    <oef:PctOfNav
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      decimals="4"
      id="h_738_b1a099fa_d048_448d_98de_2750dbe9503b"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
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      decimals="4"
      id="h_739_04883458_38bc_4744_84de_32a07d5361ec"
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    <oef:FundName
      contextRef="FY2024_C000077741Member"
      id="t_1_783e50c7_3355_ad9c_61ca_eae924b5805c">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077741Member"
      id="t_2_1fad3d3a_94ca_05d5_b74e_73d5797f2f43">Class S Shares</oef:ClassName>
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      contextRef="FY2024_C000077741Member"
      id="t_4_e4dc4e1b_6cc9_2fd6_0a32_f8c9ee4cafc0">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
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    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_5_c90c6853_f984_c3ec_2f8b_3de3d38622e0">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
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    <oef:AddlInfoPhoneNumber
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      id="t_8_635f2e6a_31c6_54f0_f96d_48cfbc43f23d">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077741Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class S Shares/JGRTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;131&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077741Member"
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      id="h_740_7e0fe829_f910_44da_a4ac_cb6b39aa83e6"
      unitRef="USD">131</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077741Member"
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      id="h_741_580dd7f7_72a8_49c8_bb31_b358bec2ca19"
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_22_20ea2af6_fc5d_9319_a76c_94553b4d5cdb">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class S Shares returned 25.69%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278528.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_12_33e112f2_dfa0_f94b_2d58_d556408311db">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class S Shares/JGRTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_RussellMidcapGrowthIndexMember"
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      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_750_087c01ae_21a2_439a_a6fa_53b2e6de3a80"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077741Member"
      id="t_13_b9949123_6f84_70fe_8424_d3089ec7ea40">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_14_da656f17_3ee9_9ff8_4e50_938bb73b7b2e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_15_3612a188_f461_1678_164c_3b2df5d5df6c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_16_5e834b98_0e2f_cb60_a6c3_f0809d9f475d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077741Member"
      decimals="INF"
      id="h_751_2f5149b0_85e4_43b5_b76c_c860e593f046"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077741Member"
      decimals="INF"
      id="h_752_b15dc048_a514_4f34_9642_a34c57b096b5"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077741Member"
      decimals="INF"
      id="h_753_97a3b1af_fbb8_4f9d_b8d8_fa0720cf604a"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077741Member"
      decimals="4"
      id="h_754_34a4a6cb_52dd_4737_9779_0c6e55005cdd"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_17_b6c5653c_372f_752e_8dd7_cb45bd5ce251">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278538.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077741Member"
      id="t_18_c3a994d0_e9e1_a770_73df_78001f07f234">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_ConstellationSoftwareIncCanadaMember"
      decimals="4"
      id="h_755_35f21d16_7808_413d_9a8b_8eb45adb1eb1"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_GoDaddyIncMember"
      decimals="4"
      id="h_756_7070a576_6b53_4087_96b4_5f59f2b37767"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_757_097981b3_b08a_4e6c_9baf_f113f318e20f"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_TeleflexIncMember"
      decimals="4"
      id="h_758_acb59155_dbac_4575_86d2_246380ce79cc"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_BostonScientificCorpMember"
      decimals="4"
      id="h_759_d4030550_79ba_4b45_8ba6_8856b53bc09c"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_CommonStockMember"
      decimals="4"
      id="h_760_6e48e53b_29ff_49ed_a10b_a0ec5fc08543"
      unitRef="pure">0.954</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_761_031c053c_7d74_459e_ae50_6277a178359f"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_762_c36ea4c3_1b1f_454d_86af_41cb11f84d93"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077741Member_OtherInvestmentsMember"
      decimals="4"
      id="h_763_83cf2d6c_322a_4988_af2b_d7f158893eff"
      unitRef="pure">-0.004</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028952Member"
      id="t_1_9b882d2c_4b88_f85a_1eda_7fef310bc3aa">Janus Henderson Enterprise Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028952Member"
      id="t_2_4bda63bf_8165_6160_7408_52b0a3fe0736">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028952Member"
      id="t_3_86f141b5_88f9_f544_d0d3_4e1416e09e6c">JAENX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_4_5a25246d_fdf4_75db_1a05_c84ba8092b2f">This annual shareholder report contains important information about the Janus Henderson Enterprise Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028952Member"
      id="t_6_9feda568_351a_f52d_b123_2a24ad626f80">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_5_67089f88_d941_81bf_d823_299208d45b60">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028952Member"
      id="t_7_2f6f25d4_5333_aceb_789b_e142160c8ea5">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028952Member"
      id="t_8_643bfea0_2bb5_7a0e_7491_8951e02d61b0">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_9_808de6b8_12dd_748e_7bc2_514481e1d56a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund&lt;br/&gt;(Class T Shares/JAENX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;102&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_764_fb5e4700_cc6c_4aed_9417_345ea9414f74"
      unitRef="USD">102</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028952Member"
      decimals="4"
      id="h_765_89da5bc3_ab88_4b93_bb2b_340b8b3f9fd1"
      unitRef="pure">0.0090</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_22_329f61c8_1982_fb54_dc09_0ca21ca814b5">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Enterprise Fund Class T Shares returned 26.02%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 29.33%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;GoDaddy contributed to returns relative to the performance benchmark. The website domain registration company has augmented its earnings growth by cross-selling other higher-margin services such as website design and digital payments. Software company Constellation Software, another contributor, benefited from strong competitive positioning and pricing power in niche market segments.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns as compared to the performance benchmark were hindered by not owning several stocks that were strong contributors for the index but which we believed carried elevated risk. ON Semiconductor was a relative detractor among owned stocks, as demand for the company&#x2019;s chips slowed along with electric vehicle sales. Rentokil Initial, another relative detractor, faced business headwinds for its U.S. pest control business.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_278567.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Enterprise Fund (Class T Shares/JAENX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell Midcap&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028952Member"
      id="t_19_36c7fb13_8194_5741_c2c5_4b8fc2a2759d">Janus Henderson Enterprise Fund (Class T Shares/JAENX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_766_107f9ba9_ced1_4f03_9dce_9e524ce3e32f"
      unitRef="pure">0.2602</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028952Member"
      decimals="4"
      id="h_767_fabb51f2_2b86_4ea7_b547_52698ea29e02"
      unitRef="pure">0.1119</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028952Member"
      decimals="4"
      id="h_768_ba7f6dca_84a3_4c13_82cd_542926bcf8f7"
      unitRef="pure">0.1293</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_20_d7d6995b_116d_640f_9096_9ff0c21fb0d4">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_769_17123dc8_f112_483c_a982_b9881b5df8b2"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_770_d7e64fee_6280_42d2_b357_ee69083810ad"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_771_26b89583_621d_41b7_8838_35de7c813cfa"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      id="t_21_e11d5c61_6d22_e471_9203_630e35c585cc">Russell Midcap&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_772_da2860c2_45eb_4772_be2d_37708047b2e1"
      unitRef="pure">0.2933</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_773_e43936ad_dcc4_40a4_b521_b3b0f57eec7e"
      unitRef="pure">0.1148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_RussellMidcapGrowthIndexMember"
      decimals="4"
      id="h_774_630411bd_aab6_413e_a121_72333069c5d2"
      unitRef="pure">0.1130</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028952Member"
      id="t_13_90d762d2_a2d7_21cf_12e0_dc73daa22d9f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_14_50b9fd84_3b6c_4ec9_a4f7_8e4c24decb78">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_15_4f893a93_0b17_b1e7_19dc_a430eb07ef79">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_16_ebeb4ad8_721b_20f2_9538_6daffcaac4a4">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,784M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;128.5M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028952Member"
      decimals="INF"
      id="h_775_0813440e_3ecb_48ae_afe8_da6e8d0e6757"
      unitRef="USD">22784000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028952Member"
      decimals="INF"
      id="h_776_f21656bf_6a17_417f_9f1c_bdd52accb2a6"
      unitRef="Holding">80</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028952Member"
      decimals="INF"
      id="h_777_320d4aac_ece0_4f99_a85a_ac7dce3e168f"
      unitRef="USD">128500000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028952Member"
      decimals="4"
      id="h_778_2bddc695_09e7_4e87_accb_a0e758e9968e"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_17_7714c406_cf55_5824_1d55_e8f34f6e3595">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.4&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_278577.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028952Member"
      id="t_18_fc37c56e_1398_5594_dfd4_a81ce3501f76">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Constellation Software Inc/Canada&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;GoDaddy Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teleflex Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Boston Scientific Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_ConstellationSoftwareIncCanadaMember"
      decimals="4"
      id="h_779_ddf1d746_982a_4076_bb3c_b3abb9eae001"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_GoDaddyIncMember"
      decimals="4"
      id="h_780_0fb90751_358d_4f41_bcc0_44ca86446d6e"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_781_18b8277b_307b_4b18_a351_e12d638bff98"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_TeleflexIncMember"
      decimals="4"
      id="h_782_5c53999e_f8ac_4aa4_b3e4_41299945a833"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_BostonScientificCorpMember"
      decimals="4"
      id="h_783_d21641ea_57fd_48b9_a7e6_fb23b34b3826"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_CommonStockMember"
      decimals="4"
      id="h_784_93e96ed8_242f_4fd1_a1a3_6c7c64fd8a1f"
      unitRef="pure">0.954</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_785_b76874c3_6274_457e_82bd_26fd231eadd8"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_786_54782d61_93d6_46dd_a0e6_e2a5c5b3dac5"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028952Member_OtherInvestmentsMember"
      decimals="4"
      id="h_787_71e53364_4c6d_415a_a39a_1cfd6c82855a"
      unitRef="pure">-0.004</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183903Member"
      id="t_1_d4c270e2_d602_7050_b2d0_bdccea2ec72a">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183903Member"
      id="t_2_c0074cef_0ee5_9b6e_7fa9_00d19e6ffa12">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183903Member"
      id="t_3_a512a354_b775_e38e_562f_04263c11e12e">HFEAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_5_58d36e4e_c629_945b_2995_dff745e6b45b">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183903Member"
      id="t_4_7185418d_5efc_a9e4_1133_47af21a4fd8e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_8_668f0f1b_4ef2_ce23_42a0_5f05db93c857">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183903Member"
      id="t_6_be14576b_ee95_46b3_9093_9f1b45fd60f4">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183903Member"
      id="t_7_53b25636_83c5_832f_e6a6_73df5dcf06ab">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_9_cc905274_0678_bfb3_cbd3_ff585c575766">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class A Shares/HFEAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;147&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183903Member"
      decimals="INF"
      id="h_788_0b81d191_48c2_402e_b2a1_7f23696fd1df"
      unitRef="USD">147</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183903Member"
      decimals="4"
      id="h_789_8ea41668_ca0a_4676_a5ac_bb5474af0ae9"
      unitRef="pure">0.0129</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_22_32c7059a_233f_574e_ec91_234426b611d1">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class A Shares returned 27.55%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000183903Member"
      id="t_11_6e58d8bd_043a_fb8e_32a3_c20fdcfa27da">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274628.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_12_3eb2d4cd_a558_f95f_9318_e5c3a48ef7fd">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class A Shares/HFEAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class A Shares/HFEAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183903Member_WithoutSalesLoadMember"
      id="t_16_cbb087f2_bf98_6e75_ce13_86d267de0dc0">Janus Henderson European Focus Fund (Class A Shares/HFEAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183903Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_790_9bd639a1_b236_4890_9b08_4a2c4fc43a8d"
      unitRef="pure">0.2755</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183903Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_791_87ed3dda_b7a3_44b9_8bd8_d33337a1f2ce"
      unitRef="pure">0.1417</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183903Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_792_55acc474_be7b_4f58_a5c7_0a25671040a6"
      unitRef="pure">0.0552</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183903Member"
      id="t_17_2a027eca_c600_b76a_2606_0b15ef6c5056">Janus Henderson European Focus Fund (Class A Shares/HFEAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183903Member"
      decimals="4"
      id="h_793_d59c155f_a2de_4a75_9986_2ee1f19f7ebd"
      unitRef="pure">0.2022</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183903Member"
      decimals="4"
      id="h_794_aa1604ca_1dd8_4b26_b819_3c5b42ad9113"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183903Member"
      decimals="4"
      id="h_795_bdb81697_9bf5_49c4_a72e_b6d8ea74ec6c"
      unitRef="pure">0.0489</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_21_afcf0aba_0855_c5fe_6f77_ec10ba2ffc5d">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_796_3cd14ef7_8620_4451_9f52_9f7fd65ee8e7"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_797_5849d7b3_ca11_4a57_bd25_c4abba995497"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_798_ac0901a1_8a37_49ae_80e0_68059fb8daba"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183903Member"
      id="t_13_21ce6f95_ae22_8616_8f36_09e1be92bce9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_14_966323e3_4b75_375a_2f8d_04d56c53a657">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_15_bedf5681_dc7e_0cbd_c495_01b9065fdf16">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_18_2aa36d2d_420f_0b30_54bd_1bba384a419c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183903Member"
      decimals="INF"
      id="h_799_a8ea3614_0083_43e0_a8e6_c9737712fcf8"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183903Member"
      decimals="INF"
      id="h_800_57063928_240c_41df_8ad3_2c29fc84aec3"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183903Member"
      decimals="INF"
      id="h_801_8da14918_8ac1_42b6_9912_51c0a3a73a4d"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183903Member"
      decimals="4"
      id="h_802_8dae0972_c047_4df9_bfd5_816cf055db75"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_19_a57fd75a_d21c_eccc_483f_3506f361525f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274638.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183903Member"
      id="t_20_e7d4b3b8_0660_88b2_7d2a_a34dd90332ff">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_803_1f4ac3e5_445d_443e_8a59_a03c14a56711"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_NovartisAGMember"
      decimals="4"
      id="h_804_22238d6f_cdb5_4d16_84cb_1b1bcc03bce2"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_805_842ca541_0573_4e50_9780_42bfad89e4fd"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_806_d0d2100d_bbdb_4792_8e41_73ead51f803a"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_807_b5b44a8e_6723_4529_8999_524a6eaba894"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_CommonStockMember"
      decimals="4"
      id="h_808_9ca372cb_66e6_4fcf_b7cb_2d8f46f31165"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_809_0e22317b_e907_43f9_bf36_18fbf54d283c"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183903Member_OtherInvestmentsMember"
      decimals="4"
      id="h_810_b912a4e4_113e_41cb_8bed_1f70049a402c"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183904Member"
      id="t_1_10fddf28_b185_e4cb_c870_5753ffa38e12">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183904Member"
      id="t_2_a6f2b4bb_2514_bbbe_6999_d549151af3b3">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183904Member"
      id="t_3_c030d06e_09bc_d032_131d_80f583884d97">HFECX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_5_7fa18853_8d7f_2b77_d9e0_e76fff08c63c">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183904Member"
      id="t_4_62ed9c63_8a52_69c1_8b8b_0c64a4756ee8">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_6_b9ef0249_cf2e_99ac_d2c1_f53d79e675b8">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183904Member"
      id="t_7_ae92d42c_e4a2_18f3_2e20_dcedc6c27097">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183904Member"
      id="t_8_7ee7acca_b258_524b_9906_2281a5f6f503">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_9_62dfc9f5_db95_e7e5_dcfb_3f47c149f13e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class C Shares/HFECX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;229&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;2.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">229</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183904Member"
      decimals="4"
      id="h_812_db5c2a43_8b1f_4414_9969_3a1f061425f8"
      unitRef="pure">0.0202</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_26_93180d70_9a0f_7de0_49c4_a9da6a79d78c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class C Shares returned 26.61%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274667.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;&lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_12_efdb8f1a_8edc_a541_573b_3cd49d04eee6">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class C Shares/HFECX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class C Shares/HFECX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.61&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="t_24_c13bd397_b60d_f1e7_10da_d30d7b671d9f">Janus Henderson European Focus Fund (Class C Shares/HFECX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_813_c50adda4_a22c_4732_acd2_c8041fb80a03"
      unitRef="pure">0.2661</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_814_a25b3891_80c5_4226_a3b7_ace667652d68"
      unitRef="pure">0.1331</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_815_810e9c32_a102_4e80_83c0_36a97501d03c"
      unitRef="pure">0.0471</oef:AvgAnnlRtrPct>
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      id="t_20_172353ec_f6b8_dac3_38ab_66e6ddd7dcf9">Janus Henderson European Focus Fund (Class C Shares/HFECX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_816_fda4d1ee_1b99_4ac9_922d_76ce59cd39c7"
      unitRef="pure">0.2561</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_817_05f067a9_d411_467d_b086_84b981f48ce4"
      unitRef="pure">0.1331</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_818_a143c39d_ad5b_4770_b462_a6955bf9399a"
      unitRef="pure">0.0471</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_21_092dbcba_f316_5fb6_3425_291051839058">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_819_d568a7d5_e599_480c_9f24_17362e899c0d"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_820_968a981c_1054_4735_aef7_216333a4ce87"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_821_d9a4fc02_b7e8_45c9_8a2c_f0b08b13900c"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183904Member"
      id="t_13_dd616ad8_5873_da63_1952_beaec3178a76">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_14_e53f0683_0094_b088_13ea_4e40a0bd4287">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_15_24169949_27fa_3cdf_de27_494e4e646bd0">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183904Member"
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183904Member"
      decimals="INF"
      id="h_822_32876370_914c_4107_ba78_1ac2f2cfd454"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183904Member"
      decimals="INF"
      id="h_823_0c19f033_e263_436f_ad4b_f0b9d77b2b32"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_824_0910cce8_019d_4136_a69f_ade566690c6c"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183904Member"
      decimals="4"
      id="h_825_2c6819be_e9b1_45d9_b867_816cedfef330"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
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      id="t_22_9522a3e6_3c49_c21b_0d6d_37180130f31b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274677.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183904Member"
      id="t_23_5034201a_ecef_763b_0d87_3bed095cd452">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_826_d8989bc8_be3f_4265_8701_72fc8ce71cac"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_NovartisAGMember"
      decimals="4"
      id="h_827_ed147a1a_0809_4387_8c3e_f795a398e4e8"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_828_77cff8c9_854a_4d04_8861_c22ffb868ec5"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_829_16f39244_7009_4abc_b4a2_643583cde49e"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_830_d194f894_22a1_4451_b9a1_b77e277f7cc4"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_CommonStockMember"
      decimals="4"
      id="h_831_fd3a93a5_4f1d_46b4_9c1f_0a55ff73a81b"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_832_02229f7f_8237_4329_9a6e_26015192a86c"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183904Member_OtherInvestmentsMember"
      decimals="4"
      id="h_833_fa81248c_d197_42ee_8b2f_58d45855ada4"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183905Member"
      id="t_1_039050ff_a56d_6198_5e88_c086172c451d">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183905Member"
      id="t_2_3167a2f6_46bb_e3ac_c0fe_dc939c400e95">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183905Member"
      id="t_3_9d510220_dcd8_2fab_aa4a_de8f948be65c">HFEDX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_5_3a71011e_39ed_e52f_0909_fa740dacbcc8">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183905Member"
      id="t_4_a5bc4725_bc41_5b4f_a942_6a7a23c0cc8b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_6_c0eee524_4a0a_c7fd_e399_f69d28612608">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183905Member"
      id="t_7_ffe23083_55c0_868b_d538_dbf51276057f">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183905Member"
      id="t_8_3aadba62_5769_a750_ea58_c3d218245622">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_9_e4651541_7212_07b7_6a8d_546d2c201d92">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class D Shares/HFEDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;125&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183905Member"
      decimals="INF"
      id="h_834_a267cef9_5d52_4bd4_b125_310ee1daec86"
      unitRef="USD">125</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183905Member"
      decimals="4"
      id="h_835_b29ea4a5_4dff_4c58_b2de_25eea1613fa3"
      unitRef="pure">0.0110</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_21_a31aed6a_d501_67c8_f398_824cdadb3a8b">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class D Shares returned 27.82%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_11_f5c9ecd3_9a0a_fffa_eca4_f8d2534d0b42">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274706.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_12_2312cf82_86bd_5ec4_1d0c_e836b4e95c86">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class D Shares/HFEDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183905Member"
      id="t_19_547b02d4_abb9_25da_81b4_8fb51adcb118">Janus Henderson European Focus Fund (Class D Shares/HFEDX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183905Member"
      decimals="4"
      id="h_836_a6ec7653_3261_4b36_8009_7433e1314acf"
      unitRef="pure">0.2782</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183905Member"
      decimals="4"
      id="h_837_ffea0c76_65f6_43d2_b397_ce27b77da368"
      unitRef="pure">0.1439</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183905Member"
      decimals="4"
      id="h_838_c4c2f49c_53a7_4a08_bfd3_3be1a81a485b"
      unitRef="pure">0.0566</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_20_faecf495_c883_ae26_426c_13bb96c0c661">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_839_fc7e12a8_1057_457e_adea_aa5f3a2969f2"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_840_cb095138_0cff_45d9_b732_aec4e7526ab7"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_841_03b9fd33_7f6e_4687_8383_3e3d0bee5d53"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183905Member"
      id="t_13_dad7a9db_fb8d_5a85_6e57_07a954d1e9cf">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_14_ba60544a_8a13_ad40_13c3_6c72d5618ca3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_15_cb241387_02e1_16e7_f258_15e0f402f344">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_16_e3d8b9b0_87ed_fab2_6f72_8d4bf840b388">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183905Member"
      decimals="INF"
      id="h_842_eaafca61_4e6f_4b62_bcb3_cc17435d9d50"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183905Member"
      decimals="INF"
      id="h_843_de96f920_7bb1_456d_bb2d_5a89c7a5f8ae"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183905Member"
      decimals="INF"
      id="h_844_df2b45ef_6748_433b_97d3_75df27f83559"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183905Member"
      decimals="4"
      id="h_845_31c2c93e_57a0_4707_967a_de6b42f548e1"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_17_9568a97b_5adb_41b1_b5b5_bc1be3b53cac">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274716.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183905Member"
      id="t_18_c7e2a3a1_9854_7401_e6a6_1ea831c0e0c1">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_846_de14e440_2682_4645_9f0f_38fec1258b40"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_NovartisAGMember"
      decimals="4"
      id="h_847_15ec26f5_6043_4788_a6bd_aaf24e55eb9a"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_848_c3af0f71_f512_4013_963f_e0a92ae92b7b"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_849_ba636929_82be_4f11_a4fc_07ba899680af"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_850_a781bf0b_0bd6_460b_a6c9_9d2819b86001"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_CommonStockMember"
      decimals="4"
      id="h_851_fde03996_42ba_44ca_9948_31d13d706193"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_852_9517b80a_adc0_471b_aaae_e7a3f5c0bb0d"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183905Member_OtherInvestmentsMember"
      decimals="4"
      id="h_853_b52c2e5a_d0a5_482d_ae5b_4cf5cbbafee5"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183906Member"
      id="t_1_69658c94_c4bc_8813_fd9e_ec49dcedeadf">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183906Member"
      id="t_2_5ed98f2f_fcdf_4614_b9f7_4969780c8143">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183906Member"
      id="t_3_e23551c0_f18b_a4fd_b4ff_ee6a1c6f521f">HFEIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_5_a5f82dc8_494f_9540_b3ed_ffbd1e1e65e4">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183906Member"
      id="t_4_8806499e_8056_c5c1_f30c_e8b9507d40d0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_6_352e92a6_4bec_a7e6_8dd7_55b4aca52506">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183906Member"
      id="t_7_fbd09b1b_49cf_8fca_a09b_b312120744d8">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183906Member"
      id="t_8_ebc09aee_84ef_06f7_0cdc_6b9ee5fde730">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_9_fb0f7046_3876_b212_5e7b_1ec910770761">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class I Shares/HFEIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;120&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_854_c547a058_c78b_44f0_bd2f_416a7d4aebd2"
      unitRef="USD">120</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183906Member"
      decimals="4"
      id="h_855_e79fa55d_7433_465f_9860_2be3effced57"
      unitRef="pure">0.0105</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_21_443dc747_69fe_c676_96c6_b32e6ce3e8f0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class I Shares returned 27.85%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274745.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_12_7eef5313_17c2_3446_f187_6d2ee7db93c8">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class I Shares/HFEIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183906Member"
      id="t_19_74243c20_b6ef_55d6_14a2_734cdb9528f2">Janus Henderson European Focus Fund (Class I Shares/HFEIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183906Member"
      decimals="4"
      id="h_856_8a1f0293_f285_4f5e_8e48_323022bfaa47"
      unitRef="pure">0.2785</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183906Member"
      decimals="4"
      id="h_857_d58448dc_eeda_45be_80cd_41ef3e8eb9b9"
      unitRef="pure">0.1446</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183906Member"
      decimals="4"
      id="h_858_29e7cc5b_c685_4bc4_a4d6_438770673810"
      unitRef="pure">0.0579</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_20_ccd2a9b7_754d_175d_34dc_dae1cb4df4b4">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_859_41136dfa_1979_4a8e_ab19_cdee2ceba0bc"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_860_30026a6b_be42_445e_a842_1f953dfdbbc8"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_861_83c365bf_5e3a_4db4_8129_f7ee1d9a02bb"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183906Member"
      id="t_13_2b2eefcc_ab4d_1fcf_c962_e0529a0dfb2a">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_14_56180dc3_32c9_9d8b_2aa7_c43129daef81">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_15_537507d5_63e4_c602_9102_e1514365840d">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_16_930cf8a9_7b94_7c91_b13b_94dd0d7668d7">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183906Member"
      decimals="INF"
      id="h_862_54ed237a_49ca_44a7_a592_927f941d3e20"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183906Member"
      decimals="INF"
      id="h_863_8ea9a7db_f213_43ed_9129_b5328a5d6179"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183906Member"
      decimals="INF"
      id="h_864_33b03aaf_0d3a_4794_a29b_83044cec9cac"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183906Member"
      decimals="4"
      id="h_865_fd44fd83_7a00_46b6_a37b_c8a95613048e"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_17_c1499482_41cb_5288_7d17_e42c9ce211be">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274755.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183906Member"
      id="t_18_d3a07cf9_c90d_ea49_a051_be8f28ffd47f">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_866_78c82cf4_25bf_457e_a456_ecf818b38171"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_NovartisAGMember"
      decimals="4"
      id="h_867_70239702_a743_46fe_97ee_0d505e4633b6"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_868_c79c30dd_59e5_4fc8_a7a5_8327dbd01b0f"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_869_b5636988_7a05_4f82_b890_69da38d87e2e"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_870_6606b939_9c54_45d8_8803_3dd381d86699"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_CommonStockMember"
      decimals="4"
      id="h_871_cdffa606_822c_4950_bc60_94f7e36b2839"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_872_c9acdab4_907e_4147_8089_67dc22e2fea1"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183906Member_OtherInvestmentsMember"
      decimals="4"
      id="h_873_535a1dbc_fdcd_494a_a066_f85f88f3bd4b"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183907Member"
      id="t_1_5faa6f40_9004_b580_c2bd_13fcb5b55c85">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183907Member"
      id="t_2_1c525f16_cd05_0a22_4d33_4b77d6cf9310">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183907Member"
      id="t_3_87bfe41b_8217_5367_2145_4a577c9b1478">HFERX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_4_9e4040d3_c52e_8c9a_de0a_fd9958e6b3a6">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183907Member"
      id="t_6_aaeb175d_f060_6e20_decb_76ea0f8f72aa">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_5_43ec5c67_4ea6_f3b3_ab40_1335fcdad3a8">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183907Member"
      id="t_7_59c24ef6_9d27_b47f_4cc2_17255124b7f4">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183907Member"
      id="t_8_b8cf87d1_42e5_c189_ef39_3fd75f896755">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_9_673c8966_d8de_526f_4665_43c6917bf388">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class N Shares/HFERX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;109&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183907Member"
      decimals="INF"
      id="h_874_c45d864f_06fa_4af5_b0bc_c682886f80dc"
      unitRef="USD">109</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183907Member"
      decimals="4"
      id="h_875_aef53334_5b64_4058_96bd_0b2c9f7ea1f6"
      unitRef="pure">0.0096</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_22_352657dd_f7f0_dabf_93e8_ff76f78adc9e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class N Shares returned 27.93%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_21_6f416ee7_3ca0_cf95_6086_cddfb4d472dd">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274784.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_12_8d88f47b_98b6_165c_a291_27d6254771b2">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class N Shares/HFERX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183907Member"
      id="t_19_3662c74e_3df0_ffdb_bdc6_d3915008226f">Janus Henderson European Focus Fund (Class N Shares/HFERX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183907Member"
      decimals="4"
      id="h_876_16809133_7040_418f_8514_cb3b85caec58"
      unitRef="pure">0.2793</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183907Member"
      decimals="4"
      id="h_877_d209e4a6_c6a1_4d7a_9eab_ed22779409b6"
      unitRef="pure">0.1454</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183907Member"
      decimals="4"
      id="h_878_30fb9011_ff3e_4513_b858_7028435143a9"
      unitRef="pure">0.0580</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_20_ad5a887f_dd99_e130_57f0_9977829bd163">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_879_6b9afc26_0de9_4bac_a62c_d90250315fcf"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_880_ae479b2d_b866_4ab2_bdc7_202460fb4447"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_881_a30ff589_41f6_4b3c_899c_2fccaf0e7ffe"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183907Member"
      id="t_13_1d15d67e_8b71_30ae_1523_bd9b25f63e18">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_14_fe4c99bf_1d8e_b817_2080_b44ffbf7eea0">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_15_20b8d495_c6c9_25fd_0014_34f95d1908b4">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_16_6ccfde9d_8c84_b114_3ccb_d0037eea9356">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183907Member"
      decimals="INF"
      id="h_882_e0e59516_de87_40d7_9b9a_cd0044a508ce"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183907Member"
      decimals="INF"
      id="h_883_644f3b7e_4fa4_465f_af1e_b13d3fbdd9d4"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183907Member"
      decimals="INF"
      id="h_884_d0cf6884_20d9_45bc_82a7_77ac655d49fe"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183907Member"
      decimals="4"
      id="h_885_f0e329f0_6426_45cb_990e_9471552332d4"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_17_c71a63bc_e552_d7c6_e918_85b29c465fa2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274794.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183907Member"
      id="t_18_a16f49dc_4e3c_9ed1_de83_4b6d0cb80a58">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_886_2e3617f2_e058_45d4_964d_1e95af88b155"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_NovartisAGMember"
      decimals="4"
      id="h_887_787da2e4_75f7_4fce_8800_bd1a47fabae0"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_888_b376332e_d5bc_4017_9702_98b43127af05"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_889_73af3017_ee19_481b_9bf6_f1bdb97fcfb7"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_890_c2895524_abe8_4f95_90b8_1fdd822d0438"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_CommonStockMember"
      decimals="4"
      id="h_891_0411ed5e_959f_4977_af76_ac4b88a77b28"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_892_1be5e56a_a8d2_4154_b7dc_5557f2d3c772"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183907Member_OtherInvestmentsMember"
      decimals="4"
      id="h_893_dcae506a_9734_4023_a0de_142a51d57b12"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183909Member"
      id="t_1_010b0ff4_5395_c601_826d_ec627ba29527">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183909Member"
      id="t_2_14cc9fb4_e7fc_4006_ffd4_d7aa0a443e45">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183909Member"
      id="t_3_88bfa9d9_9d2b_57a0_2ca9_253d0ce286ca">HFESX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_4_51cc0d10_6f12_977b_008f_a436dcce1b34">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183909Member"
      id="t_6_e2fea86d_0187_5db0_4e89_26e2d1feb479">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_5_26ab4ad6_3b2e_15da_420a_80314c24ef20">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183909Member"
      id="t_7_4726fffd_7a0b_b615_c292_96a3f28587e9">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183909Member"
      id="t_8_537d03a8_878f_43bc_b87d_e2e70fe67c93">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_9_c239faa7_1ab2_c6e5_9f9c_2bf35462b21e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class S Shares/HFESX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;159&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183909Member"
      decimals="INF"
      id="h_894_224a21f8_171f_46ad_a2a7_dbc36bed1fa4"
      unitRef="USD">159</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183909Member"
      decimals="4"
      id="h_895_43a27078_3ca8_4491_9c0d_a583eefff5e5"
      unitRef="pure">0.0140</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_22_44ccbb57_81fe_b111_52c2_05dea121fbb1">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class S Shares returned 27.42%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183909Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274823.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_12_5d9b87e2_f903_41c3_bf63_9c5de37b3243">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class S Shares/HFESX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.51&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183909Member"
      id="t_19_535a11c5_4dbb_a433_1743_88243c3d0429">Janus Henderson European Focus Fund (Class S Shares/HFESX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183909Member"
      decimals="4"
      id="h_896_efb86571_48d0_4aab_a2a2_48206772fe86"
      unitRef="pure">0.2742</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183909Member"
      decimals="4"
      id="h_897_6dcf2580_575d_45e0_b645_ff0ba2a3deb5"
      unitRef="pure">0.1423</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183909Member"
      decimals="4"
      id="h_898_d2371f25_2cc3_4b88_969c_643f19552396"
      unitRef="pure">0.0551</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_20_c655e74d_a73a_1e9a_67cb_acf668c0096e">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_899_39d91796_ad03_4ac5_a535_fbebf2bceb5e"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_900_f0617e96_f73c_43df_a6ec_7d34d27ca8ac"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_901_08974430_7a99_40b4_a19b_18f1e24eb110"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183909Member"
      id="t_13_044732d6_d313_9792_76b0_5aeee0a98ffb">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_14_1932fc38_6c02_6253_5cfb_e1b1c42cdf92">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_15_14c427d1_5128_ba25_0c71_3b0c3dc9bbeb">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_16_2df1e70e_5c32_3f02_1d85_d390a5f0eee3">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183909Member"
      decimals="INF"
      id="h_902_d36b93b3_dc99_4c6d_b635_769cd73fc54a"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183909Member"
      decimals="INF"
      id="h_903_d8d26a13_0616_488f_bcfd_0a417e89624e"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183909Member"
      decimals="INF"
      id="h_904_e6922e42_5eb2_489b_9a8e_5f7ef4e043d2"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183909Member"
      decimals="4"
      id="h_905_0e970d9f_f7a9_49e2_8ebf_ac5a01275a8e"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_17_482fc799_1d58_5c08_eb9c_3464a8fd818a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274833.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183909Member"
      id="t_18_8e200f28_5a66_b921_8c22_857b015b7e6e">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_906_2cf7f97a_02bb_43cb_801d_e3bf5c579851"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_NovartisAGMember"
      decimals="4"
      id="h_907_546d4e41_e8b6_462e_8ad3_a13e8ffc71d0"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_908_cb89c440_0ad2_4bc5_a8f0_6d3285494a2e"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_909_1816ab2a_9493_4a66_985c_d0a3832d8a57"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_910_981506fd_97a7_41be_938e_acacd7a49e41"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_CommonStockMember"
      decimals="4"
      id="h_911_ba04c493_24a9_4a5d_b124_e59ab7aa1bc6"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_912_161efc0f_1fa6_42f0_a631_808b30eb0ce1"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183909Member_OtherInvestmentsMember"
      decimals="4"
      id="h_913_0dc71cf0_52c9_4e5a_8fea_f1d6de6b82b5"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183910Member"
      id="t_1_e40359d0_e56c_f0f0_9efb_121d409c5072">Janus Henderson European Focus Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183910Member"
      id="t_18_02350fd7_c31f_8500_bcef_e186b5f5fe32">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183910Member"
      id="t_19_51025949_a9ed_9272_6b95_75f3089e49c8">HFETX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_2_21b165a0_8e62_33f3_a6f9_69e398215492">This annual shareholder report contains important information about the Janus Henderson European Focus Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183910Member"
      id="t_4_6e8336d7_d3ac_f55d_110d_e53cb849b838">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_3_33959cfb_c7fc_091c_0e7a_636a955356cc">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183910Member"
      id="t_5_6a6942d5_0698_9d58_e172_4accce4a7c9a">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183910Member"
      id="t_6_200c86c0_99ff_489e_d5ed_588ae308dd60">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_7_9b0bd5a7_ee1f_b7c6_444e_2a971ee59aae">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund&lt;br/&gt;(Class T Shares/HFETX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;138&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183910Member"
      decimals="INF"
      id="h_914_796a704f_1336_4318_89f0_e76709a7cbc3"
      unitRef="USD">138</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183910Member"
      decimals="4"
      id="h_915_65a31309_e023_40dc_b436_1be2b4832692"
      unitRef="pure">0.0121</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_22_fec803e7_b661_02bd_5af3_2eecb2a15b98">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson European Focus Fund Class T Shares returned 27.66%. Its broad-based benchmark, the MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.23%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our holdings in BE Semiconductor, ASML, and ASM International (all semiconductor stocks) benefited returns relative to the benchmark. On the back of a&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;troughing semiconductor cycle in early 2023 and further boosted by the artificial intelligence investment wave, semiconductor stocks performed strongly over the first nine months of the period. This strong performance triggered profit-taking in the last three months. However, we believe the prospects of our semiconductor holdings have not changed.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our underweight position in Sanofi (a French pharmaceutical company) detracted from relative performance. The company announced a lower profit outlook and a spinout of its consumer care unit in October 2023. However, it recovered strongly over the rest of the period. Universal Music Group, the Dutch music company, detracted due to unexpectedly slowing subscription growth in July. Anglo American, the mining company, also detracted as Chinese macroeconomic negativity led to weakness in mining stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_21_052da3c5_c693_1bc3_d6a8_db6ebb5fe405">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274862.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_10_12572a5e_7a03_1a97_5210_94d3ece7e5a5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson European Focus Fund (Class T Shares/HFETX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI Europe Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183910Member"
      id="t_16_414748a5_59ae_4a51_affd_9254795028a3">Janus Henderson European Focus Fund (Class T Shares/HFETX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183910Member"
      decimals="4"
      id="h_916_0b32f90b_9cdb_496a_9b60_a0094dff9247"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183910Member"
      decimals="4"
      id="h_917_406c2aab_78ff_4135_9e8e_2a22968a14fb"
      unitRef="pure">0.1427</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183910Member"
      decimals="4"
      id="h_918_4bf8f5c8_fa7b_4590_a9f9_c8bbdd5fc9a5"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      id="t_17_714593a5_4cc6_6451_8958_d1d69b49ca1b">MSCI Europe IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_919_e501c6dd_3603_4aa6_9562_0fb9043f3b5f"
      unitRef="pure">0.2523</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_920_a896bc1e_dcf2_4ffa_b863_b51fe9a807b1"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIEuropeIndexSMMember"
      decimals="4"
      id="h_921_0244528a_3307_4283_977a_7794500411be"
      unitRef="pure">0.0559</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183910Member"
      id="t_11_ad2a4213_c876_a3d4_b9fe_d830b97b3bfe">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_12_1e0681c9_9197_bdbb_e88f_3b4c70aaa121">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_13_f20fee0c_06a0_680e_cdf5_0bafefb1dca9">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_14_6aa8f0e2_b1ec_c95a_e6f9_876f8a86ab61">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;504M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;43&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4.1M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;168&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183910Member"
      decimals="INF"
      id="h_922_88c9e1e1_fde3_47b9_96d8_437018653a3b"
      unitRef="USD">504000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183910Member"
      decimals="INF"
      id="h_923_80047380_73f8_45f6_ac89_4e222a9102b2"
      unitRef="Holding">43</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183910Member"
      decimals="INF"
      id="h_924_9a803ac4_a903_4e1b_a32f_ed13bc3b372f"
      unitRef="USD">4100000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183910Member"
      decimals="4"
      id="h_925_ec77c7a1_a4c3_4cb7_b435_fb117dab0b86"
      unitRef="pure">1.68</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_15_263ee6a1_91f2_5eee_1279_c24a569a8cf0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274872.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183910Member"
      id="t_20_86744d93_91d4_e04c_f2d2_337134f0e902">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novartis AG&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;LVMH Moet Hennessy Louis Vuitton SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;TotalEnergies SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_926_0e2203f5_8e5f_448d_9cea_1fc95da81be6"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_NovartisAGMember"
      decimals="4"
      id="h_927_50b81a98_75d8_4bf6_b4b3_72989edca6cc"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_LVMHMoetHennessyLouisVuittonSEMember"
      decimals="4"
      id="h_928_ad64d5a8_54ff_423f_bcfa_0c8beb67d7e7"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_929_d3d0cf1f_ec2b_417e_9139_324656b779a8"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_TotalEnergiesSEMember"
      decimals="4"
      id="h_930_8becf38a_9c56_4658_ab6f_5c5c8eb985fd"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_CommonStockMember"
      decimals="4"
      id="h_931_60abc9e3_5968_4663_8439_a820de8a964b"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_932_a68d6e8c_7007_42d5_a978_609231424e28"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183910Member_OtherInvestmentsMember"
      decimals="4"
      id="h_933_2325e6aa_7dd1_4f20_ada8_44fcfc466708"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077618Member"
      id="t_1_7d790d21_d9d0_b2c7_2849_7b78b8e441bc">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077618Member"
      id="t_2_04697b61_4c5b_ae0b_2328_6d065b096399">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077618Member"
      id="t_3_cada0008_3cb9_97f3_1fe8_2cd0d588b06d">JDCAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_5_772e332f_5428_7de8_70ff_35b8933a3968">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077618Member"
      id="t_4_5de75c08_7f4a_9057_a7bd_8a80760c2d35">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_6_19e47fe9_50bd_9532_a408_f567dcf4aeee">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077618Member"
      id="t_7_02c1d291_fb3a_a456_6bcb_4f98b8abc831">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077618Member"
      id="t_8_eb0eedde_3236_f4ec_0ca0_43e800c81d2a">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_9_48532150_efba_0b49_1ae0_4de15c00da29">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class A Shares/JDCAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;102&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077618Member"
      decimals="INF"
      id="h_934_85061fd5_802d_426e_9497_745ccc1e4f12"
      unitRef="USD">102</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077618Member"
      decimals="4"
      id="h_935_60d42555_49c4_4c7e_bd4a_fc940769668b"
      unitRef="pure">0.0084</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_24_8edce09a_93a6_9a43_5b54_cd0e1ad7f3d7">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class A Shares returned 42.41%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_11_76a38f49_ef4c_9f98_6298_609ca3a9e89e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275876.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_12_6caa51f6_3e0e_e0bb_0ab3_60446c12ecf9">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class A Shares/JDCAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class A Shares/JDCAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;34.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4241</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.3422</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1499</oef:AvgAnnlRtrPct>
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      id="h_941_e2591b10_c633_428f_911e_419561fab1e5"
      unitRef="pure">0.1498</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      id="h_942_a740de01_b06b_45ad_a0a3_fff153fa55ce"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      id="h_943_dd3cd288_ff6f_4665_93a9_eaf40a81bc59"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
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      id="h_944_0e03d32c_4f89_4f5c_92ae_14ef143f71aa"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
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      id="h_945_ef632f4e_7830_4679_b669_c4ca5ef73cda"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_946_52b71a1e_1a80_49fd_90ab_5e9f163c0585"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
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      id="h_947_ef63f219_3e76_4c5d_a6b4_8a5bd44a59af"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_23_104646be_2702_a6d9_a418_6780446c208f">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_948_5478e716_f94b_4126_8da0_f49dc9372bb9"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_949_e1f5255e_8b16_42f4_b12e_7c7c479be490"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_950_d2150e64_8a6c_4f8b_9b9e_8539a9934ec5"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000077618Member"
      id="t_13_0cbfea77_fc94_27b2_5b0e_6ed9d8b37b9a">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_14_89ba9c83_6cd6_1092_8dc7_56312c14695e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_15_396378c9_17ef_245a_7fab_ca10e885086e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_16_e41c1f41_ebc6_2469_e1fe_f30e1298f996">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077618Member"
      decimals="INF"
      id="h_951_b0d4c74e_9e58_40e7_8d66_f40601d45154"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077618Member"
      decimals="INF"
      id="h_952_3c23923b_d184_4dc1_b030_33275b940ccd"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077618Member"
      decimals="INF"
      id="h_953_57b537dd_e5cc_4949_af46_e757bc5ee420"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077618Member"
      decimals="4"
      id="h_963_3ac46605_8140_5133_cc0c_f9f29a142095"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_17_fe420f79_7e67_3f6e_c1ca_80055124fc29">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275886.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077618Member"
      id="t_18_ccf3adb0_4078_5d25_2bdd_a6138acac674">

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;
&lt;/div&gt;



&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;

</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_MicrosoftCorpMember"
      decimals="4"
      id="h_955_f2060caa_6565_43ff_839b_eb9e349cffeb"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_NVIDIACorpMember"
      decimals="4"
      id="h_956_7cc5913a_441e_4bfd_a380_9d810f75b704"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_AmazonComIncMember"
      decimals="4"
      id="h_957_eb1fd822_364a_4568_a3b7_99c5b967d355"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_AppleIncMember"
      decimals="4"
      id="h_958_fff79a98_cc73_4926_8ac8_6b9436a6f4e6"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_959_9989b40c_7883_49f0_b314_c0ffc33d5140"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_CommonStockMember"
      decimals="4"
      id="h_960_4b327988_b9fb_49c4_a1e8_6cfdfea69451"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_961_9bb334e9_2702_41e0_8f12_1c2e328dc4a7"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077618Member_OtherInvestmentsMember"
      decimals="4"
      id="h_962_148910f4_f5c1_402c_b341_cebbbbe467b1"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077619Member"
      id="t_1_de3bc46b_4b7f_7df9_1cec_e02d1c016547">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077619Member"
      id="t_2_59d1c861_324a_8d71_1434_4ae752eb8b73">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077619Member"
      id="t_3_5b168a5f_443f_59a0_9613_48db1317d5a0">JACCX</dei:TradingSymbol>
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      contextRef="FY2024_C000077619Member"
      id="t_5_a42f44c8_a2e7_8031_8e60_11d324a69326">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077619Member"
      id="t_4_e0eee52d_d9a5_fe13_94b0_ff67005c13fd">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_6_1302275c_5e39_03f7_e879_67b45194a393">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077619Member"
      id="t_7_a90d6508_3f2c_da2e_ed8b_c13aee7f3f32">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077619Member"
      id="t_8_2433ca4c_092c_9e60_2a0c_edcb6bb2c311">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077619Member"
      id="t_9_fad51823_6fea_8dc7_e71c_a8af96ec696d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class C Shares/JACCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;183&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077619Member"
      decimals="INF"
      id="h_992_b7aee51c_7404_f05a_2ab7_cdf032c8161c"
      unitRef="USD">183</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077619Member"
      decimals="4"
      id="h_964_65326e76_6bf2_4b14_80f1_b92783779e48"
      unitRef="pure">0.0152</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_24_a8f48665_d18f_f8bf_768b_7b79bf441972">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class C Shares returned 41.44%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077619Member"
      id="t_11_9703f449_1210_1500_5d0e_7955fafd9050">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275915.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_12_6c91e529_e7b4_74f2_1b7b_e0fbbbf2e9a1">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class C Shares/JACCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;41.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class C Shares/JACCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;40.44&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077619Member_WithoutSalesLoadMember"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077619Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_965_1358b742_30c4_4c2b_b638_66e8a6e679d1"
      unitRef="pure">0.4144</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077619Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_966_9c47dda3_ae8a_4d07_93ec_2629e46e58cb"
      unitRef="pure">0.1558</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_967_3f1001b8_3751_4801_ab9e_a83d268aef3e"
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      id="t_20_b5fccc90_327d_1e4a_b488_1141c6f1d961">Janus Henderson Forty Fund (Class C Shares/JACCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_968_c2edf055_a5bb_4679_a7bc_6aa5a2012777"
      unitRef="pure">0.4044</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077619Member"
      decimals="4"
      id="h_969_8f2cb2eb_ba64_4b5a_946e_6f85bbe5bfd1"
      unitRef="pure">0.1558</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077619Member"
      decimals="4"
      id="h_970_704dd21c_7d93_48b5_827b_dfdb2ce5d188"
      unitRef="pure">0.1494</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell1000IndexMember"
      id="t_21_b310c498_f76d_b56d_1df8_67e3237573ea">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_971_f81ec62f_dd7c_48b1_9671_9624d01bdbf9"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_Russell1000IndexMember"
      decimals="4"
      id="h_972_b4fb7fc3_fa9e_4d96_9973_bfa49b40bb24"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_973_cf016bd7_e033_4cfc_8db7_034a67139e8f"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_22_e6679263_f778_d8c8_a97e_11105e506d54">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_974_d4d948db_2540_4b3e_8109_dce7630d4d9e"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_975_f8e6da39_d114_4516_8a28_c16f8667a58f"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_976_645ed9d5_0ccf_43cc_8567_91cab1fb48b7"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_23_c90a3ae8_c680_3ac6_ae25_38b0404a1515">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_977_6168e0c0_aff8_400b_9405_5d29e0d63a0b"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_978_4f27ff75_a75b_4a31_8a8f_3d972b838892"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_979_b0b0fae3_20ce_4968_bf9f_f2814c847750"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077619Member"
      id="t_13_e2e5946b_cd7f_0c03_a87f_1d7e3820c4e2">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_14_da612273_175f_ac2d_c5ef_30c893c5ede4">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_15_c3d3c588_d18c_f9e7_bc9b_eae5a1ce19dc">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_16_8aef1fa9_468f_9be9_ca41_433175ed698e">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077619Member"
      decimals="INF"
      id="h_980_cb6830bc_737e_418e_bd60_85190c952904"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077619Member"
      decimals="INF"
      id="h_981_95819a52_75ce_4591_9217_00a6fdb08e60"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077619Member"
      decimals="INF"
      id="h_982_ce541d87_d910_40c7_aef5_68ea7f80e404"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077619Member"
      decimals="4"
      id="h_983_302f51a5_2c5c_473d_985f_8f056bf4ebe2"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_17_c9fec11c_5cd1_6cc1_2d64_c4d5f89b435c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;
&lt;/div&gt;


&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;


&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275925.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077619Member"
      id="t_18_9d19bcbf_8c46_d46b_b41c_3859b53d7a03">

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;
&lt;/div&gt;


&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_MicrosoftCorpMember"
      decimals="4"
      id="h_984_27215dcb_67c0_4ca4_a4ec_3f08bd99e286"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_NVIDIACorpMember"
      decimals="4"
      id="h_985_c7fa7351_9049_412d_809c_8d948fc76ef9"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_AmazonComIncMember"
      decimals="4"
      id="h_986_6c3bca70_7518_4ecb_9dfd_c6350ca3710f"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_AppleIncMember"
      decimals="4"
      id="h_987_01bebe7d_138d_4ab2_a575_cf117db29996"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_988_8dc9ade1_cce8_4405_a93b_998d0f57109e"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_CommonStockMember"
      decimals="4"
      id="h_989_ee28e7d6_a6c7_4c8d_9ed1_58e5fc486a63"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_990_767ef6c6_9ead_4fad_9b37_2931425fdcd7"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077619Member_OtherInvestmentsMember"
      decimals="4"
      id="h_991_f33d2ae4_253b_4531_86c9_f3c15be54b42"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000177054Member"
      id="t_1_21bf0601_9fd6_9d0c_2fb3_a0193d8b67ff">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000177054Member"
      id="t_2_62fc3560_a8de_724f_69f1_0d8a76f16481">Class D Shares</oef:ClassName>
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      id="t_3_cb754395_130b_a8f9_23ae_49079c792e92">JFRDX</dei:TradingSymbol>
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      contextRef="FY2024_C000177054Member"
      id="t_5_2681df33_4fd2_84f0_4dc9_fc57242627b2">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000177054Member"
      id="t_4_e0fc0499_f1f0_eb5f_98fe_a3dadc210d8b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_6_7cd8dc66_8412_77bc_6c96_969a9de2c9f7">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000177054Member"
      id="t_7_e3721161_13eb_59e2_9542_a2e2b2ce1a2c">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000177054Member"
      id="t_8_c9c8e0ac_f6d6_c55b_71a2_5e1d9084885d">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_9_13415c2a_f520_2c33_ba19_2e59f9232cf5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class D Shares/JFRDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;76&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000177054Member"
      decimals="INF"
      id="h_992_1d6fa92f_5a88_4639_a0f2_3bb4bc75df08"
      unitRef="USD">76</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000177054Member"
      decimals="4"
      id="h_993_e04d1919_f083_42b8_baa5_770189708f38"
      unitRef="pure">0.0063</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_23_4f9716f6_6b91_ef90_5cf1_9c6275e32d6e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class D Shares returned 42.68%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275954.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_12_00fef357_1d60_0791_ab87_bd95e5249105">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class D Shares/JFRDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4268</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      contextRef="FY2024_Russell1000IndexMember"
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      contextRef="FiveY2024_Russell1000IndexMember"
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      id="h_998_a9a4ffe7_f1ae_4637_b353_609307e6c5a5"
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    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_999_ad409903_5569_4950_a93c_f0a04142acc1"
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      contextRef="FY2024_Russell1000GrowthIndexMember"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1000_19c933df_7706_476a_84ff_2b28cf4e099b"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1001_48874cec_cd18_4b19_9e3a_abc78c8336dd"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1002_6380442c_156e_4823_a84a_845fec7edce6"
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      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_22_09e625d4_0a5c_d03a_2246_74e5deb30f21">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1003_99d2c18f_db73_4b1c_beab_3f6ac15f7175"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1004_1ef9005d_9fbf_4137_ac91_7a44797fa662"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1005_6a316c71_c6dc_4d73_aa77_4563b857d9ab"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000177054Member"
      id="t_13_edbd1d4d_f575_953c_7c37_36e6f07db65a">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_14_88b10bf2_247d_7c26_0fe2_c916ba139b6a">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_15_576e7749_ecf2_da33_19d8_06162cb041fa">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000177054Member"
      id="t_16_b5f85776_bc87_2e8b_710c_15383dc4e73f">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_1006_667a5bb0_ad1a_4dab_be74_7104127cf325"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_1007_027f9895_e17a_4b6a_b4e6_ff2a21ae452b"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000177054Member"
      decimals="INF"
      id="h_1008_ec62528e_fbfb_40ef_90ac_b96058372061"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000177054Member"
      decimals="4"
      id="h_1009_ae53fa8f_bada_4f84_a2f9_3dd49332ceeb"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_17_081d27e3_57ac_a973_3c34_99512551c267">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;
&lt;/div&gt;


&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;


&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 10pt;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;
&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275964.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000177054Member"
      id="t_18_b77cfba6_dd6d_7457_9360_423b39eb4326">

&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;
&lt;/div&gt;


&lt;div style="padding-right: 10pt; padding-left: 0px;"&gt;
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
&lt;/div&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1010_d46bbbf8_6efd_4183_a36b_3453b9270598"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_NVIDIACorpMember"
      decimals="4"
      id="h_1011_2f4351aa_38f8_416c_86b3_545d390cc574"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_AmazonComIncMember"
      decimals="4"
      id="h_1012_96be1020_c4f0_4724_a90d_1f80fd477c2e"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_AppleIncMember"
      decimals="4"
      id="h_1013_89669b56_1a6f_4213_af08_8d7cfc9ad20b"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_1014_91f8defa_2f83_497b_a3a3_52a0563c042f"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_CommonStockMember"
      decimals="4"
      id="h_1015_c807a9a8_6d3d_4c42_a7e5_ee1c9cbca7fc"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1016_5a7d2364_8c60_4647_98da_8c2007ef956e"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177054Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1017_3163f478_bf1c_4331_a13b_7e8e55a12d8e"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077620Member"
      id="t_1_74f07233_726d_3674_6ead_23996d6dc645">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077620Member"
      id="t_2_88d67062_fa50_aa22_bc9c_ad092a123531">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077620Member"
      id="t_3_faac39f3_fa2a_f2e2_e0f8_e149a977088d">JCAPX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_4_da3c1c55_57ac_05a8_5741_4b5553bfd650">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077620Member"
      id="t_5_e6375481_5ff8_16f7_7cb5_68501974299e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_6_f3c356a3_611e_0662_77e0_7a2a2233a5fd">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077620Member"
      id="t_7_0448ea3b_0a08_266c_0677_53dd4400dc95">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077620Member"
      id="t_8_8bc2031b_3a7f_9f2b_876c_a148db58f627">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_9_d43e8f65_a217_f89d_89d9_d2bc984057f9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class I Shares/JCAPX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;72&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077620Member"
      decimals="INF"
      id="h_1018_cd2a6315_777a_4305_aef0_9a5ef84c5db6"
      unitRef="USD">72</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077620Member"
      decimals="4"
      id="h_1019_09feed18_18cf_491a_8545_ac1eaf89b039"
      unitRef="pure">0.0059</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_23_fcb6e863_551a_ed27_22e5_e4d73aa0e00c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class I Shares returned 42.76%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_11_99091eae_b8a1_eaaa_717d_808ed0811610">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275993.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_12_68d9618d_590e_4105_aaac_90d5406620a1">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class I Shares/JCAPX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4276</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1666</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1599</oef:AvgAnnlRtrPct>
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      id="h_1023_1df15e94_98de_4881_87ae_086d1102561b"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      id="h_1024_ad86e288_4296_4f58_8070_855bbb246d14"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
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      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_1025_a883b13c_d12f_4e62_9243_666a32d9a347"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_21_698681dd_0913_3331_b488_1c0a6c667072">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1026_9699e2e9_9bcc_4895_bea9_1e0b33eedcb9"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1027_a112d793_f53e_4fb8_b593_695a38d78725"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1028_9f2df53d_f01b_4bc2_a772_a7b39673b3a0"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_22_436e655e_429e_3961_25e7_b7c4c36e7c68">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1029_ca6df189_3d83_4d43_8559_49ef39245381"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1030_ec0c3f63_5112_4ed5_88ea_ef28e455b678"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1031_554aafa9_839a_4c32_8421_0fbb0e123670"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000077620Member"
      id="t_13_774da8b3_dab0_e91d_a9a2_5b15af070a69">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_14_62ed1bd3_c9a4_c722_3c24_e329f57e8e49">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_15_ef75980b_5f2f_08f7_8a8a_4cb6dd645b2c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_16_1e458e12_6859_86e0_55c5_59c49912a434">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077620Member"
      decimals="INF"
      id="h_1032_65ac1f11_67f7_4976_8d5f_8d96f1e55c74"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077620Member"
      decimals="INF"
      id="h_1033_ea234dc7_32b4_42c7_b2cc_56e9ed4ad4d3"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077620Member"
      decimals="INF"
      id="h_1034_a96c3d8b_30bd_4c23_a560_9c2618bd5508"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077620Member"
      decimals="4"
      id="h_1035_09d71eec_b803_47d2_9a6b_31b8076e4938"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_17_76db89ac_87b6_bc3c_7195_84925b7d6843">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276003.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077620Member"
      id="t_18_9cbfe947_52e6_da9a_79ab_0d4769d98ec6">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="t_1_79fe1067_9522_e417_3fb4_4199dabd7c2b">Janus Henderson Forty Fund</oef:FundName>
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      contextRef="FY2024_C000114888Member"
      id="t_4_f551c0cc_2033_0f7c_d303_7456182153df">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
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      id="t_6_8b18d7ae_b26e_66ac_1c4c_2f6cac5cb1e5">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class N Shares/JFRNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;63&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="t_23_4f654cb3_5013_c1ab_a719_b7e670b7b522">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class N Shares returned 42.86%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276032.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class N Shares/JFRNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_1056_de288d42_b1c9_44cc_adb5_53db33696914"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1057_d562455c_4560_4809_965d_8814baf4665b"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114888Member"
      id="t_13_084dce5c_82b1_eca0_cb08_f711d8a55bb2">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114888Member"
      id="t_14_cbf5f04c_4cb2_7671_0592_4176e76137b3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114888Member"
      id="t_15_4ed5638f_9e50_e0e5_ace0_9b8a667bdefa">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114888Member"
      id="t_16_e3213111_0a4c_8d51_699e_d9851b420c88">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114888Member"
      decimals="INF"
      id="h_1058_073b93b5_eaed_47ed_a1a5_716b8f5d2794"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114888Member"
      decimals="INF"
      id="h_1059_63f24068_fb9c_44bc_93d6_4f584046d239"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114888Member"
      decimals="INF"
      id="h_1060_e8c4d45d_b493_46a3_ab84_fe6951b66501"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114888Member"
      decimals="4"
      id="h_1061_2747bd7c_46d6_4289_b15c_8420d44492e9"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114888Member"
      id="t_17_05afceee_f618_94f4_de9c_2fa48fbe9213">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276042.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114888Member"
      id="t_18_586c0c38_d555_6a06_7959_7b90c3a07390">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1062_82568fe3_ee48_4f7c_bd2b_3354cccb3d48"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_NVIDIACorpMember"
      decimals="4"
      id="h_1063_e44b1b6f_ffb2_4304_b248_c6fb413919bd"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_AmazonComIncMember"
      decimals="4"
      id="h_1064_1b2678f8_64e4_408f_b1fc_8d527d5bf7b7"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_AppleIncMember"
      decimals="4"
      id="h_1065_4e0062a4_0d53_407b_a29f_2fab2f8c9eda"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_1066_dd4428c4_305b_4ebe_886a_5547e09d9ee4"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_CommonStockMember"
      decimals="4"
      id="h_1067_65c3a3ff_7143_4296_9697_70c0fc6d39d2"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1068_15e7f933_186e_4546_867d_6c8bf30bb9a3"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114888Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1069_849da68a_4b2d_486e_bfcf_a22bf899aa59"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077621Member"
      id="t_1_6635c402_354d_737e_48b1_46447b107d24">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077621Member"
      id="t_2_bc99ed70_1972_7763_6984_2d5bf625babf">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077621Member"
      id="t_3_2e55d999_d936_1a28_0fbb_be21be70f0d5">JDCRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_4_41482d0b_18a0_1d35_b97e_29f67da5efd8">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077621Member"
      id="t_5_675965e5_40e1_760f_b2b6_34e31424763a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_6_d0568990_dc1b_a55d_ee75_ce15c487f41b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077621Member"
      id="t_7_3e55eb2b_20a0_6654_1e06_8cfc71651314">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077621Member"
      id="t_8_ece91b89_16c0_28d0_6fb1_bd2ef8529984">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_9_6c93fac3_b40d_7303_28fb_9d68e1a53266">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class R Shares/JDCRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;152&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077621Member"
      decimals="INF"
      id="h_1070_a446a4bb_6189_40d6_a8ba_6b54c72b443f"
      unitRef="USD">152</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077621Member"
      decimals="4"
      id="h_1071_0e45ce15_70ad_43fd_82ab_da5bb876855a"
      unitRef="pure">0.0126</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_23_c07cf195_23cd_a754_33e4_6ec177fc3415">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class R Shares returned 41.79%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276071.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class R Shares/JDCRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;41.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      id="h_1072_d870847f_9168_4ef1_9c52_c05c26d7cb0a"
      unitRef="pure">0.4179</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077621Member"
      decimals="4"
      id="h_1073_5073b6f3_0dcc_42c8_81f7_e6cc6c11d25c"
      unitRef="pure">0.1588</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_1074_52cb83f3_7601_4e94_b65c_d7b70c42ce02"
      unitRef="pure">0.1522</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell1000IndexMember"
      id="t_20_d468434b_fae4_aa5e_5f67_d3dec364b803">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1075_d7fdd716_e2e4_46ab_8d7b_5016b5a02729"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000IndexMember"
      decimals="4"
      id="h_1076_70c22c7f_d9be_455f_97a6_25a6bcf78301"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_1077_37396e7f_bdd9_4d52_9b45_c5b56e17d2d1"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_21_2d747bf9_9a10_ff91_5c4c_cb9da34ad9dc">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1078_8b013bc9_3207_4ddb_b524_1f31276ab4bd"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1079_55d19506_aedc_4678_8a26_776cdc168f16"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1080_51d79db5_7be0_43e6_bea3_3d5208c9b671"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_22_d9dd5428_2383_843f_c8bc_504f60451004">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1081_f297227a_6394_48c2_a5d2_2c9412fcde4a"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1082_c800a6a7_b285_4c9d_b13b_164588474e90"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1083_ab29a7ef_9c63_4aac_9601_436da007d29b"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077621Member"
      id="t_13_c36b132c_5c6a_32b0_d3a8_6f009a84fe6c">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_14_015d6cab_7804_ebef_a815_000c9969b5ce">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_15_d04418b8_2ad6_8add_3d14_dfedb89113b2">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000077621Member"
      id="t_16_e66dd162_2255_4996_9a8e_3651edb7e6e7">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077621Member"
      decimals="INF"
      id="h_1084_880ea7f0_1d62_49b7_b34a_7141b749f4d0"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077621Member"
      decimals="INF"
      id="h_1085_e5865af8_3fdc_4241_94ce_dde351b6cd38"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077621Member"
      decimals="INF"
      id="h_1086_453c312c_f497_4531_81ac_271d63e5f639"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077621Member"
      decimals="4"
      id="h_1087_c931721e_5ffe_4554_b6fb_2e6374a4577e"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_17_01e6cee1_9f85_bd44_8295_f1843d1ec499">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276081.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077621Member"
      id="t_18_7cd5cac1_39e8_8c21_1ea6_30ddf0b5fba5">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1088_6725159c_7750_4590_9724_bdb00d7b210a"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_NVIDIACorpMember"
      decimals="4"
      id="h_1089_d8de723e_f6ef_4e3a_8dc7_f819e730cd25"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_AmazonComIncMember"
      decimals="4"
      id="h_1090_a90ea23f_c764_4935_9989_c7eeb9cc6fee"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_AppleIncMember"
      decimals="4"
      id="h_1091_4b149765_f8a2_4215_94c9_72bd1b9340d9"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_1092_3375547a_cae7_40bc_b1bd_9eb39ef62fef"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_CommonStockMember"
      decimals="4"
      id="h_1093_97837dde_ac20_4480_81a8_bf0b47f7f813"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1094_32a8c828_dc5f_4d93_bda2_fb635620b020"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077621Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1095_9c5f2e3a_dfdf_497f_a188_5f5e12b4e2eb"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077622Member"
      id="t_1_de94cd42_d885_124c_34d5_7c548e52986a">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077622Member"
      id="t_2_eee0e115_4fcf_0b36_c5fa_dbf7324eb44d">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077622Member"
      id="t_3_1cf43ab8_a913_6f71_01af_2a40a8878763">JARTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_5_e44feb03_d459_1674_af4a_2527015aeade">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077622Member"
      id="t_4_0eae8062_4ecd_b920_6376_b665e0aab972">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_6_9d370ae6_2a34_dddd_e297_3fe6300d84a5">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077622Member"
      id="t_7_2f9254f8_078a_4992_a8fc_7ab544c20f0a">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077622Member"
      id="t_8_e7f21cc3_5f9b_413e_1906_2b0ca8d9c3bd">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_9_c9bb1e8a_7072_f4f0_832b_3655800f8c88">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class S Shares/JARTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;121&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077622Member"
      decimals="INF"
      id="h_1096_59a24b0f_6bb9_4cad_bd0e_7fe4df3bcb7b"
      unitRef="USD">121</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077622Member"
      decimals="4"
      id="h_1097_d116a5bb_5f7e_4207_93ce_d29e5b822e35"
      unitRef="pure">0.0100</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_23_5ba8e553_0f5c_113c_9396_815fb3835342">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class S Shares returned 42.18%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_11_012f845b_789e_a70b_2e29_9acf6d81b33c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276110.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_12_a94fd420_2e4d_f9b5_c1df_3bca7aab8a13">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class S Shares/JARTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.4218</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell1000GrowthIndexMember"
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    <oef:AvgAnnlRtrPct
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      id="h_1104_408fb8d6_53f0_4246_944a_f2bdbefce7bc"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1105_d94bbbc7_2b96_45eb_bf12_abfabe8e905e"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
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      id="h_1106_11e3bf17_1fbc_473e_88a7_bf5cbc196bad"
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      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_22_9aeb03ca_12ff_e167_0ebb_4ff5aaf5060b">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1107_04620f2e_b994_431c_a1f8_9ade2e30c978"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1108_82b55b4f_85f3_42c5_ba71_86f40cc8d73e"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1109_de72f7a2_9d95_46a0_a455_0313ab6bf4f7"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000077622Member"
      id="t_13_878a3285_c98d_6a04_47c7_23b016ca5590">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_14_3a4d940c_e0dd_ea28_41cf_96952f5afdd3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_15_14bfd009_69eb_581a_d8d0_0334e1775823">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_16_2a3013cc_b1fe_c71c_e783_0cba495bfce3">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077622Member"
      decimals="INF"
      id="h_1110_412181ff_5200_43ef_b4d6_ccd86e76e578"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077622Member"
      decimals="INF"
      id="h_1111_1a0b852d_30b0_42b5_b84f_efdb6486ca4f"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077622Member"
      decimals="INF"
      id="h_1112_5175849f_56d6_4e37_ad33_2545cf172605"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077622Member"
      decimals="4"
      id="h_1113_59138bd0_2ec6_420e_8a4e_716f440070af"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_17_bb1b0aca_cd84_e941_91ac_87475431cbcb">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276120.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077622Member"
      id="t_18_d33dd84f_572b_9a93_9211_ac3f598ebee2">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1114_be51300b_d6b1_47d1_ab0e_ea2628d8bb32"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_NVIDIACorpMember"
      decimals="4"
      id="h_1115_7d78893f_7276_4a9e_aa25_0977c58ac87b"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_AmazonComIncMember"
      decimals="4"
      id="h_1116_a9fe1722_deaf_44a2_b1d3_47fa2a5366e7"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_AppleIncMember"
      decimals="4"
      id="h_1117_5b5f9859_7099_40c3_a188_8d2eb856fd12"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_1118_1bd733c8_640d_4d66_a19a_fc4f3d83e523"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_CommonStockMember"
      decimals="4"
      id="h_1119_19e78080_a95d_47a8_9314_156e8af76a05"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1120_0b0c4b19_3e34_4eb5_90c7_97e71f93b69a"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077622Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1121_f5816153_ac8f_4517_bd9f_97dcc1ffe1a9"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077623Member"
      id="t_1_3474f381_4014_7bbb_f7a8_1e0ef56c75e6">Janus Henderson Forty Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077623Member"
      id="t_2_250112f1_169b_1021_3e8a_f2e26cc6d1f8">Class T Shares</oef:ClassName>
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      contextRef="FY2024_C000077623Member"
      id="t_5_6dd6273f_4b43_2992_1afb_9e1e3f9d000f">This annual shareholder report contains important information about the Janus Henderson Forty Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077623Member"
      id="t_4_26151e04_634d_e42a_5b70_a27736fadf3a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_6_bc3b9a64_2182_7750_1795_dc96fc7301cf">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077623Member"
      id="t_7_7a70304f_0dfe_ddda_6a23_db5e4028d287">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077623Member"
      id="t_8_bee3be80_b4fb_050f_557a_a1c9b9f494c6">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_9_dc391c00_38e6_f522_4ea7_78dc1cfa931a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund&lt;br/&gt;(Class T Shares/JACTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;90&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077623Member"
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      id="h_1122_8a3746c9_730f_4fb3_989f_f4e296b6407b"
      unitRef="USD">90</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077623Member"
      decimals="4"
      id="h_1123_bd2422dc_f5d7_475e_9759_ede05a03b372"
      unitRef="pure">0.0074</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_23_5adad211_3d4f_5bd3_ff17_540b8d6bb790">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Forty Fund Class T Shares returned 42.52%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Howmet Aerospace was a top contributor to returns relative to the performance benchmark. This manufacturer of precision aircraft components delivered several quarters of strong profits growth that surpassed expectations. Enterprise software company Oracle also contributed, supported by growing demand for artificial intelligence and its strong market positioning in cloud infrastructure.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Real estate analytics company CoStar Group was a notable detractor from returns relative to the performance benchmark. Higher interest rates pressured CoStar&#x2019;s core commercial real estate business through the first half of the 2024. Agricultural equipment maker Deere &amp;amp; Company, another detractor, faced uncertainties around farm fundamentals and elevated interest rates in key markets such as Brazil.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276149.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_12_cf20a15d_dcbe_66c8_5c9d_8e23d30abc52">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Forty Fund (Class T Shares/JACTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.47&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4252</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_1125_95cabbfc_fa16_4938_987e_b524485bab97"
      unitRef="pure">0.1647</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1126_8697ba18_dd99_484f_9a6d_5db3f88861af"
      unitRef="pure">0.1581</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell1000IndexMember"
      id="t_20_2a8e27c0_d574_6719_6a26_2bc3083552b9">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_1127_583db798_deff_405b_8dfd_4801ba4909b4"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000IndexMember"
      decimals="4"
      id="h_1128_cea6331d_c364_42e8_b9df_92096fcbee41"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_1129_7ff8797d_be78_4b7c_a907_aa09aa31d44a"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_21_7e9663f1_8b53_0606_edd1_be8ffea21450">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1130_b174b8dc_bf8a_4b1c_81c0_10360361c03a"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1131_ceadabb3_3276_4a55_b9bf_6e26d1af4829"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_1132_bf67979a_f38c_4541_acf4_a498ef5f5090"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      id="t_22_3653ab59_f2a3_2ba8_2127_2b6d6f0f0bcb">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1133_e8a64f6e_149b_41fa_a5ac_278964e86079"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1134_c0d0dd6d_aa8a_4edb_84f1_aabb01338427"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000025893IndexMember"
      decimals="4"
      id="h_1135_03661233_9564_4a75_83ec_9fc9f42ce2bc"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077623Member"
      id="t_13_d510fc62_582a_1caa_e13f_b6d2c77653a8">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_14_be8d5f03_cfb6_da78_1664_ba6dc8aaf832">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_15_a3a91cd3_4418_eba4_1627_d0b67c60300b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_16_a85efe15_2eae_7161_38ff_1ddb388716b8">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22,096M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;40&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077623Member"
      decimals="INF"
      id="h_1136_b925e801_9072_4ac0_94ac_dcd052a650b1"
      unitRef="USD">22096000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077623Member"
      decimals="INF"
      id="h_1137_34939ab4_513a_4be8_abe0_5d800f3f66a6"
      unitRef="Holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077623Member"
      decimals="INF"
      id="h_1138_4a57a54d_9d60_4031_bd6c_d40616bf7766"
      unitRef="USD">98000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077623Member"
      decimals="4"
      id="h_1139_d5c80b79_8c64_460e_a173_5c26fef755de"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_17_39e14c64_2063_6a2a_e64f_87156983021f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276159.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077623Member"
      id="t_18_554c3e60_1472_c46a_8566_c2b144b14abd">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1140_78fc9a73_d44c_416a_a0d1_4f2a77aa71c0"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_NVIDIACorpMember"
      decimals="4"
      id="h_1141_90674a69_01b6_43f2_a0cf_4856bc50109b"
      unitRef="pure">0.080</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_AmazonComIncMember"
      decimals="4"
      id="h_1142_4f1852fe_11a3_4e32_ba16_aa980819dd9b"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_AppleIncMember"
      decimals="4"
      id="h_1143_d65ccbb1_646e_4527_ad6d_739d0965b8e7"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_1144_648415c9_3923_497f_9a25_16b492199171"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_CommonStockMember"
      decimals="4"
      id="h_1145_167f1e2f_6248_4e6d_ada0_0c0dd22f465c"
      unitRef="pure">0.991</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1146_68c86efe_465e_42cb_9c87_4fb0f71adac1"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077623Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1147_cf64c495_9f4a_44fb_9adb_117a7d39b6f7"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183893Member"
      id="t_1_64e587f4_4548_88dc_8e74_3c09894549f9">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183893Member"
      id="t_2_dab8f925_edd3_4866_cc77_c3824cd6fb6c">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183893Member"
      id="t_3_bf590264_7602_b271_f510_5a247a882743">HFQAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_5_1f5d9767_aff4_44b7_2048_9c29abbf8c3b">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183893Member"
      id="t_4_ed6cfb52_2686_7720_ff4e_92be41a2a08d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_6_5f516035_66bc_a038_1f95_36c207ab5bf2">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183893Member"
      id="t_7_e4f4896c_48b0_a3f9_3915_5b4fcb29e5f0">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183893Member"
      id="t_8_2d10a463_a397_5893_1dfc_1f0a58d932af">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_9_884e9036_3e03_13ea_25c8_05f20df28f3e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class A Shares/HFQAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;127&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183893Member"
      decimals="INF"
      id="h_1148_c3fcc0cb_6951_4945_8722_b791ba9d13c1"
      unitRef="USD">127</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183893Member"
      decimals="4"
      id="h_1149_1b1848ee_f8e7_42fc_94fa_7bec2a9610b7"
      unitRef="pure">0.0115</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_23_2eb89f1f_44f4_710b_c687_b0884d621c2c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class A Shares returned 21.09%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_11_d91e453f_3242_961e_b1fd_2e1d3b0743a1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274901.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_12_57c47855_93e5_514e_473c_670242b7a52e">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class A Shares/HFQAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class A Shares/HFQAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183893Member_WithoutSalesLoadMember"
      id="t_19_6b3d1f44_8206_fc40_53af_f11c49ef1bd8">Janus Henderson Global Equity Income Fund (Class A Shares/HFQAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_1150_8610face_271e_452d_8bda_9ca4d45815a6"
      unitRef="pure">0.2109</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1151_2aad0880_49ec_4073_be68_826999c2e78d"
      unitRef="pure">0.0742</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183893Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1152_9cae4042_55ea_44b9_a822_cdfd10483fa8"
      unitRef="pure">0.0510</oef:AvgAnnlRtrPct>
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      id="t_20_45d12f70_46c9_5625_3fc6_5055d10e19ac">Janus Henderson Global Equity Income Fund (Class A Shares/HFQAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1153_1af6038d_524b_46f3_95ed_077843eef1a3"
      unitRef="pure">0.1410</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183893Member"
      decimals="4"
      id="h_1154_6a5a33c0_6b10_44b7_9010_47ce3ae57ef5"
      unitRef="pure">0.0616</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183893Member"
      decimals="4"
      id="h_1155_83494744_e9c3_4621_8962_81645aba42b2"
      unitRef="pure">0.0448</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_21_b95da5e6_df02_3526_ff66_b3519027b631">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1156_a86139e9_6bd2_4af5_b56a_498928ed336e"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1157_26175fd1_5738_44e0_a1d9_9136e46dd804"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1158_52456c0a_ade7_4724_b296_228f6c2556f1"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_22_3c23cdd5_990d_9c86_bd30_9d223e85707a">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1159_14d9cc8a_c0b7_4975_9ca5_ab777e131992"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1160_9fb43d4e_40cc_42b0_929c_222258f700db"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1161_e13a3301_04e6_4e6f_8eeb_90cbca9ddbce"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000183893Member"
      id="t_13_0d64d3d4_7e6d_2b45_34b9_08946cc96e81">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_14_2eefaca6_f545_2a53_c8d6_00f71152921a">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_15_e6c7831c_a5be_4aba_0c63_3158cde57520">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_16_0732474a_d9bc_610a_6e04_46641d677076">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183893Member"
      decimals="INF"
      id="h_1162_ea9f3bc6_a56f_435e_b57d_32f3c8148d8b"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183893Member"
      decimals="INF"
      id="h_1163_20ba210c_a028_4c48_8610_bc3fe75fa92a"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183893Member"
      decimals="INF"
      id="h_1164_31e7b4e0_a111_4278_abbd_f859f92ce5fa"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183893Member"
      decimals="4"
      id="h_1165_fcf70a93_8e78_40d3_9d68_ff330231eaf8"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_17_2ee9897e_c9c6_9f5d_8c29_84addbc168e1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274911.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183893Member"
      id="t_18_a947c46e_f38e_47af_b99b_04298a25b88e">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1166_4e6a9045_95a3_4c7d_8bed_c8b8a929261d"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1167_d61e1e75_f162_46dd_ae8c_6ac53ec19444"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_UnileverPLCMember"
      decimals="4"
      id="h_1168_7dd871b2_5839_4999_94fa_a3d91a74dc46"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_PernodRicardSAMember"
      decimals="4"
      id="h_1169_f82a446a_4ea7_4350_9ebc_807264e7ea89"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_RioTintoPLCMember"
      decimals="4"
      id="h_1170_9bb1a514_49f5_4815_b966_33224c51a2d0"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_CommonStockMember"
      decimals="4"
      id="h_1171_770ede88_3bf5_44a5_8e57_033169972f06"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1172_0190ec90_7d64_44fb_bda9_45108882fa77"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_PreferredStockMember"
      decimals="4"
      id="h_1173_bb5959fe_2c5a_4cf5_806d_303e38d09143"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183893Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1174_4914c742_4bf7_4d72_b9c9_7b19da059dcf"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183894Member"
      id="t_1_939cd76b_a6ee_a6dd_ece3_e790606cb0be">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183894Member"
      id="t_2_3b5ce914_9d82_9226_0150_93d6edef0501">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183894Member"
      id="t_3_78c84f68_e910_eb02_0857_765ac503fa9e">HFQCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_4_a74be19a_f505_19f9_d3c3_33cfb519149b">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183894Member"
      id="t_8_13f0e0fa_a325_8566_e830_84ca7adaa8b0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_5_59bdd59c_3b07_506e_6213_4ee54fcf9b77">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183894Member"
      id="t_6_b140b6b1_706c_3756_4b76_10904b890a30">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183894Member"
      id="t_7_41334d6e_8a9a_3fe2_322b_60b262d95815">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_9_af3559bd_73f2_f150_8ca7_19820e7af3c2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class C Shares/HFQCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;191&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183894Member"
      decimals="INF"
      id="h_1175_4cd376b9_807f_447a_9024_1ae1638bde6f"
      unitRef="USD">191</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183894Member"
      decimals="4"
      id="h_1176_52014a1c_63c6_4f20_be52_91450c7dda4e"
      unitRef="pure">0.0173</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_23_64f2814f_0e45_8b50_dedd_8603796a5872">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class C Shares returned 20.29%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_22_d3f7b6bf_3097_9ee2_fe8d_c857392be510">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274940.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_10_80444177_13fc_d2df_ac17_82183a17673c">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class C Shares/HFQCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class C Shares/HFQCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.29&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183894Member_WithoutSalesLoadMember"
      id="t_17_77624920_9dc2_c08a_9359_8b69208bc1bd">Janus Henderson Global Equity Income Fund (Class C Shares/HFQCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183894Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1177_eac2c83f_7627_448f_a8da_d45c04749b07"
      unitRef="pure">0.2029</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183894Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1178_1cd073a8_4854_466e_8ba8_75e997cf76b9"
      unitRef="pure">0.0669</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183894Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1179_5a58ae7f_6dc9_4924_8320_73d634bf18bc"
      unitRef="pure">0.0438</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183894Member"
      id="t_18_4ef149fc_7c88_a59a_abd5_58adf9f1688f">Janus Henderson Global Equity Income Fund (Class C Shares/HFQCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183894Member"
      decimals="4"
      id="h_1180_76465eba_ce64_4ab9_b26e_c2b515d8cbe9"
      unitRef="pure">0.1929</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183894Member"
      decimals="4"
      id="h_1181_bd3b58b7_babf_4a08_9b0c_8ce3c7d8d65f"
      unitRef="pure">0.0669</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183894Member"
      decimals="4"
      id="h_1182_e8469ff9_fb5a_4e36_aa2b_863b91deec86"
      unitRef="pure">0.0438</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_19_22b7ece8_0a84_a24e_b74c_113f41b5930f">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1183_fbca989e_81de_4e49_8175_5a8d13b7f1f4"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1184_ab317eaa_375d_485e_ba91_04b6b8dceee9"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1185_3b9f3c4d_189a_40ca_8384_12d7757efff7"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_20_d197fd27_4682_235e_45ae_dcfed80ae3cb">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1186_71fe1aef_17bf_42ad_a00f_84a324579547"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1187_7459ecc7_15ae_44da_b396_be253561715b"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1188_163c113a_5715_44c7_be77_539477b8254d"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183894Member"
      id="t_11_6d73fc73_9580_c44d_7815_3e9dff359e89">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_12_f1d2fd9a_5bd6_474d_75f3_6593c82d7491">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_13_955bbefb_7aab_8440_7572_f58be130a1f8">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_14_ad27b04d_f9d4_0b93_5157_bf0f350cb907">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183894Member"
      decimals="INF"
      id="h_1189_59ef4546_c9cd_4f09_abcb_233577419e58"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183894Member"
      decimals="INF"
      id="h_1190_56791552_2fd2_4a35_b64c_1dbf52c6b10c"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183894Member"
      decimals="INF"
      id="h_1191_b4682b33_c1a0_479f_8964_6dc75f8be524"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183894Member"
      decimals="4"
      id="h_1192_6aaf2861_d477_4f61_a1f3_a3c0a07c1400"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_15_cdc8ee03_2f89_f914_849d_0d6e47596c29">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274950.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183894Member"
      id="t_16_24aab8d0_6a70_2cf8_88ee_cf248967c87c">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1193_8e520076_4b82_45d3_9c03_c851b88e2287"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1194_af1bcff2_a31d_430a_9509_cb2767154303"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_UnileverPLCMember"
      decimals="4"
      id="h_1195_4ed1797f_e226_40ee_8b4e_ace4f30fcf7e"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_PernodRicardSAMember"
      decimals="4"
      id="h_1196_04399a1a_809c_4527_9a46_e950c21ea946"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_RioTintoPLCMember"
      decimals="4"
      id="h_1197_36a40e6b_db4c_4827_b0a4_981c48b1d83f"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_CommonStockMember"
      decimals="4"
      id="h_1198_d174b50c_0d90_42a6_80b2_1f986cb35184"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1199_26221303_f2f6_4075_8b4b_f55d949b0313"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_PreferredStockMember"
      decimals="4"
      id="h_1200_e1fb99d5_291a_4ae7_bec8_ee720353eeb0"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183894Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1201_8c8acbb0_b6af_45d3_9300_2ceafe26c2f2"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183895Member"
      id="t_1_89ecd57b_a636_057b_516f_c0a7d341c6e8">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183895Member"
      id="t_2_9404cf58_3b4b_dabd_a138_92feaae79edb">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183895Member"
      id="t_3_a0664cb7_6945_95c6_f6d6_dfdf670c3aa3">HFQDX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_4_5f3c27a9_868f_516a_018c_2e1450805b11">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183895Member"
      id="t_5_4cc51598_812b_cb64_b583_c0126db2a2dc">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_6_1c080952_f64a_3d39_6cdf_940bbb02a59d">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183895Member"
      id="t_7_3d44d487_7cf7_4a2b_551d_774def3a34e4">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183895Member"
      id="t_8_203991b7_ca83_9ee1_b21c_31fdc9883671">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183895Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class D Shares/HFQDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;96&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183895Member"
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      id="h_1202_270ccb34_08a6_4267_b027_36e6b5444263"
      unitRef="USD">96</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183895Member"
      decimals="4"
      id="h_1203_4716901e_0a87_4a07_aacb_e06537a8697f"
      unitRef="pure">0.0087</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_22_cab1934e_d7de_7425_bc93_abf5ff519400">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class D Shares returned 21.48%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274979.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_12_934ac721_aeff_3785_d456_8c6283b5d538">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class D Shares/HFQDX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183895Member"
      id="t_19_3961130e_16c3_1d3c_d87f_5d48156a0d67">Janus Henderson Global Equity Income Fund (Class D Shares/HFQDX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183895Member"
      decimals="4"
      id="h_1204_8830c47b_a3f7_41f4_a739_d82371cd11dd"
      unitRef="pure">0.2148</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183895Member"
      decimals="4"
      id="h_1205_500ccd3c_a579_48fc_9c6a_9cf269025841"
      unitRef="pure">0.0766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183895Member"
      decimals="4"
      id="h_1206_1904aa77_b711_436d_9c9a_5206267852cf"
      unitRef="pure">0.0527</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_20_f74c4d9c_c971_e1ef_e6bb_0b45207f6dd4">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1207_65536eb6_9edb_4deb_9e41_f091ca5dc11c"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1208_5dde83f6_9443_4046_8739_e11dee9e973f"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1209_6066d68a_c1ad_45f3_8672_51b23c16c46e"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_21_35d635e9_943c_eb3f_3ba8_b4ee11b15146">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1210_371fef29_ce34_4792_b4c9_ad92c67442f6"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1211_6d5a2401_9388_4344_bc68_dea8589201ed"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1212_acc80184_48f0_40a1_87ee_ed1ceb288d71"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183895Member"
      id="t_13_a3250d7f_054c_9bd6_ea29_18d5c1d8de18">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_14_0b0ed265_1346_8418_ff41_c35c13134020">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_15_436dc1c9_c231_81c1_01b5_ae2637d17bdf">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_16_d2e88cd0_7449_b76e_8236_a723a5b9f9ef">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183895Member"
      decimals="INF"
      id="h_1213_921be017_b91d_4693_8fe8_59ece5dc5231"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183895Member"
      decimals="INF"
      id="h_1214_6a7abdda_15bd_4728_94b8_72b36fb66f67"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183895Member"
      decimals="INF"
      id="h_1215_27463bf2_bc0b_4d33_a750_f34b1c070927"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183895Member"
      decimals="4"
      id="h_1216_25f394e5_0a30_4a73_9885_ee110f7fcd86"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_17_240dee96_14e6_6b12_4aaf_3dda04f3e7b5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274989.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183895Member"
      id="t_18_d9eb2762_24de_e6dc_d9d2_efa0621ca6fc">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1217_7bdd541e_d1a2_4786_b851_4d84fee18042"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1218_1cd5ea14_bd05_49db_b296_db09ce6b134f"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_UnileverPLCMember"
      decimals="4"
      id="h_1219_1672e512_e8c9_425f_92c9_658ac8ca1999"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_PernodRicardSAMember"
      decimals="4"
      id="h_1220_69c15cf3_7b71_4c9d_9f9a_4af56e94997d"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_RioTintoPLCMember"
      decimals="4"
      id="h_1221_f5f0b4d8_402a_403d_9e7b_d3bd1ccb6b25"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_CommonStockMember"
      decimals="4"
      id="h_1222_cd668ed1_b399_4060_b2a9_be88b8ef38ba"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1223_1c3bcc54_3b40_4900_ad49_06795369f467"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_PreferredStockMember"
      decimals="4"
      id="h_1224_c9d97dd6_7c85_469f_882b_5a4fc4135a5c"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183895Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1225_13a024ab_0cbf_4f44_9626_79800717918f"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183896Member"
      id="t_1_74159d1d_0185_d14a_91db_51f6b0b055e8">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183896Member"
      id="t_20_6f3a619f_441f_e981_6cfd_e04d2da4f3d7">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183896Member"
      id="t_21_20c8647b_d195_58b5_3c31_5e586913972a">HFQIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_2_abee1549_d8c1_edfd_1006_5176c629d301">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183896Member"
      id="t_6_f5c5804d_6a61_aa41_0ec4_6f8fd958e51f">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_3_3506292e_17fd_c335_32e1_a0f005580b4e">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183896Member"
      id="t_4_c9394dc6_9379_9f67_f3cb_00411a412898">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183896Member"
      id="t_5_927cee14_66fe_547b_209f_ff972e0f1678">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_7_d163fe5b_c1ca_b62d_21e5_961df660aaf0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class I Shares/HFQIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;87&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183896Member"
      decimals="INF"
      id="h_1226_aee98da2_d893_48b2_aff7_24f4fdb04c98"
      unitRef="USD">87</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183896Member"
      decimals="4"
      id="h_1227_b2fda19d_81bb_499b_933c_cf0459cc89f1"
      unitRef="pure">0.0079</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_22_3ed972b6_e710_1d40_f807_1469ca8a8209">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class I Shares returned 21.39%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_9_75f7e487_633b_7ecd_1f29_f768f919b561">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275018.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_10_28d20e67_65c6_5a52_eff8_7281822c777d">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class I Shares/HFQIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183896Member"
      id="t_17_c95f4f2e_922d_dd4f_cd66_3d5a433c6915">Janus Henderson Global Equity Income Fund (Class I Shares/HFQIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183896Member"
      decimals="4"
      id="h_1228_a91edf1c_4cbe_406d_b21b_77a46ac291b5"
      unitRef="pure">0.2139</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183896Member"
      decimals="4"
      id="h_1229_2c05a64d_eac3_426a_ac6d_175612a7b750"
      unitRef="pure">0.0774</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183896Member"
      decimals="4"
      id="h_1230_c3ba8eee_85a4_4630_ac94_6ed2a21c7eb9"
      unitRef="pure">0.0542</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_18_55893241_8a4b_a9bf_b367_a3f4cc044c56">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1231_02ee2074_c1b3_4e2d_8812_b75401db9c16"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1232_44aa1ec8_decb_4fe0_876a_a03338182ec7"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1233_5e641112_f937_4401_8093_e2711a5a3357"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_19_264298e4_2dea_fcca_2d1c_8b787860c621">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1234_ee0507c6_fb06_4cfb_98d1_302e14ae9cdc"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1235_857c16b2_ba87_43e1_9bde_678d38707434"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1236_189b3ab4_99fd_460e_95bc_c25ca7b25245"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183896Member"
      id="t_11_ecc24137_4573_d78b_8766_fad5a337f243">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_12_efb06b1f_b458_21f3_b930_0a665df1c716">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_13_30b781b9_e1a0_d61f_f21b_dda5f1038339">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_14_1fce632a_1473_22da_6e03_b81dcab2b93f">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183896Member"
      decimals="INF"
      id="h_1237_8f9c8ec1_65d9_44ee_8d9c_2b055b010a1b"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183896Member"
      decimals="INF"
      id="h_1238_474c5089_5d8f_4222_bd75_d151c3ad95c7"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183896Member"
      decimals="INF"
      id="h_1239_5cc947c7_d164_4d25_95c6_a08093379056"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183896Member"
      decimals="4"
      id="h_1240_2af77144_c6c5_46cf_b479_a18c91eedbd4"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_15_fabab2e4_7d81_2a7d_3f41_b178c124b8f7">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275028.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183896Member"
      id="t_16_3afc4634_c777_154a_093c_30396b4b71b1">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1241_54084f41_0452_462f_9921_9969f0bdf9ba"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1242_f207cd6d_98ff_42e8_9ca4_72f4d0827fd7"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_UnileverPLCMember"
      decimals="4"
      id="h_1243_09eb1dac_1eb0_4927_99bc_85200d790c23"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_PernodRicardSAMember"
      decimals="4"
      id="h_1244_a6af1d16_4b06_43bb_a656_3ec50b88d37f"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_RioTintoPLCMember"
      decimals="4"
      id="h_1245_e1ad1248_e623_47c2_bd3a_83915db87e8e"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_CommonStockMember"
      decimals="4"
      id="h_1246_29d1666a_8169_4928_b9c0_bebd71af5ab6"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1247_8ec3cedc_106e_46fb_ac08_2f2dfdfa1ff2"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_PreferredStockMember"
      decimals="4"
      id="h_1248_1f9abd13_930a_4f6a_b546_89f0afc48713"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183896Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1249_d258ea8a_5857_4326_bb9e_c2ae87dd109a"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183897Member"
      id="t_1_b2eab0a5_2615_0db3_ad8a_dec641005a3b">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183897Member"
      id="t_2_abde6631_ab7a_b9c1_0712_5f25e010908e">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183897Member"
      id="t_3_202fd509_c57c_65f5_3040_f4792ed1be2e">HFQRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_5_d309f05c_0f60_e285_4c72_8c14cfe805b0">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183897Member"
      id="t_4_4b947723_fe73_d7dc_033f_b66e7ea3d21c">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_6_f9632d9b_c37f_a050_8db8_ddbdf272598c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183897Member"
      id="t_7_bbc4122c_dcdf_6a17_8346_6334d1221234">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183897Member"
      id="t_8_59a815a1_fdda_1ea4_c022_ac5b092be590">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_9_101758f2_a69f_8640_21ea_3eeb5e1ecfde">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class N Shares/HFQRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;78&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183897Member"
      decimals="INF"
      id="h_1250_671dc025_0417_4d9e_bb25_9a6baaa9347a"
      unitRef="USD">78</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183897Member"
      decimals="4"
      id="h_1251_69e91db1_dc79_4923_8ae3_ff9048f7e29c"
      unitRef="pure">0.0070</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_22_a16c5eee_e9b2_c3fd_fc7c_59315f8b8c32">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class N Shares returned 21.50%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275057.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_12_98c14ba1_55ce_db84_c73f_85a4f986e1ca">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class N Shares/HFQRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183897Member"
      id="t_19_9d2bed35_8bf1_8b81_bfe2_abec61907ae3">Janus Henderson Global Equity Income Fund (Class N Shares/HFQRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183897Member"
      decimals="4"
      id="h_1252_bcb05a7b_8b59_4d90_9a02_05aeb15cce5b"
      unitRef="pure">0.2150</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183897Member"
      decimals="4"
      id="h_1253_35ea7356_c065_4a5a_b94e_a77193abddfd"
      unitRef="pure">0.0782</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183897Member"
      decimals="4"
      id="h_1254_15131aeb_f52e_44da_a8fd_751dd38130ea"
      unitRef="pure">0.0546</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_20_589a4462_9f6e_a386_2faf_68568117ce78">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1255_d83d56d7_6103_4ba4_8ed8_edf7366331d3"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1256_72660041_5639_486f_9b67_014e9a0d9d0c"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1257_93023210_e2c3_4fb5_a71f_ee645d1fca41"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_21_63706903_132c_f921_555a_bfe47eccc918">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1258_1f674cd0_5a39_405f_a798_f068457def23"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1259_952812d3_03dc_49f8_81e7_0c932dabedb7"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1260_ea428169_023a_4315_b861_8ec212a931db"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183897Member"
      id="t_13_d2e3f35e_e8c9_e4b4_a320_17c2ae366140">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_14_80e787a2_dcca_f3ce_2bf7_1c52f2ecf7dc">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_15_f1646acb_7442_f351_8629_ebb80df1c58a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_16_8f4d665e_1f5e_f353_db51_7c6e5af95365">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183897Member"
      decimals="INF"
      id="h_1261_01b6ad7b_0a03_4ae3_bbb7_fad4fe1417cd"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183897Member"
      decimals="INF"
      id="h_1262_f0ae6d5e_dbe0_4295_aa84_6e57092966f6"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183897Member"
      decimals="INF"
      id="h_1263_4f245aad_7250_4469_87ef_c94146cb705e"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183897Member"
      decimals="4"
      id="h_1264_c1c4eecf_9f06_4cbe_b05e_805250d768bc"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_17_b65b4543_30fa_9cd3_3326_405ae13c5f67">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275067.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183897Member"
      id="t_18_972ae53e_e7b3_16c9_43d7_21909d898bfa">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1265_f46c96e5_e291_4679_836c_be200e5b508d"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1266_925c1828_bfbb_4b9a_82c4_e921b384cd00"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_UnileverPLCMember"
      decimals="4"
      id="h_1267_b2fbbf00_cf56_4898_96ab_aa8d4dcc8793"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_PernodRicardSAMember"
      decimals="4"
      id="h_1268_df93cd38_2b45_4470_bdf1_e69566bf0c1d"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_RioTintoPLCMember"
      decimals="4"
      id="h_1269_bd3c9765_3360_4bc0_87b2_bed906d0c256"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_CommonStockMember"
      decimals="4"
      id="h_1270_684fec73_1c02_46c2_8aa9_f2ed7107df26"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1271_0fb50f29_c3d4_44c5_a28f_0a6867cb2bdb"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_PreferredStockMember"
      decimals="4"
      id="h_1272_985ad789_742c_4c31_9217_a1bfbed16fa6"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183897Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1273_34666236_c751_4811_be3a_7c6bfac193c5"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183899Member"
      id="t_1_89e08a38_9631_bcdb_237e_2980f1c3955f">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183899Member"
      id="t_2_8da51d35_6289_c634_22a6_4f286acbdcd2">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183899Member"
      id="t_3_3a4d3055_9f7f_fe66_8a6f_10676e56a54c">HFQSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_5_42a01283_1973_6a84_6a08_9276f5487155">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183899Member"
      id="t_4_6aefa760_e12f_67b9_ca20_7b50caa8712a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_6_658f3a22_a508_888a_7e7b_8edc1b235906">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183899Member"
      id="t_7_4d1f7cf9_8175_0be1_c11e_9348d057d0b3">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183899Member"
      id="t_8_8a1cd188_f164_ab93_4b66_65e2bfd0c895">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_9_59efc91a_6eaa_8404_674b_20abf7dedcba">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class S Shares/HFQSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;133&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183899Member"
      decimals="INF"
      id="h_1274_4cf7530f_f53e_4d60_a19c_06741462d7f0"
      unitRef="USD">133</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183899Member"
      decimals="4"
      id="h_1275_dbd4136c_5157_432a_9004_5c73fedbe672"
      unitRef="pure">0.0120</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_22_33bbc543_820d_bf74_a95a_81dfb429721a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class S Shares returned 20.89%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_11_a3b2f191_a6fd_5193_d298_6128e98a4aa9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275096.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_12_8281533d_9c88_4f19_3e25_b932366e3dcb">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class S Shares/HFQSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183899Member"
      id="t_19_1a2ac634_8282_f386_6125_9b61615fcaca">Janus Henderson Global Equity Income Fund (Class S Shares/HFQSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183899Member"
      decimals="4"
      id="h_1276_2a5b1081_443d_4ed8_a55c_9bd4fae01b03"
      unitRef="pure">0.2089</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183899Member"
      decimals="4"
      id="h_1277_39658dc8_3187_4b47_9114_7176a217886d"
      unitRef="pure">0.0725</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183899Member"
      decimals="4"
      id="h_1278_dac99ffd_728a_4926_a9b2_cd4dc5554ac7"
      unitRef="pure">0.0496</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_20_ffb15272_9234_b67f_7bde_70144bcd9458">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1279_e120a2e9_3f18_4ec9_92fd_5736efa70784"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1280_d15a247f_b1b1_4f5a_83e1_134096b050b1"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1281_b3e8fc13_5dcb_409c_886d_cec500a42ce2"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_21_13e95ca8_c1c5_31b2_764d_8ca915d51bc2">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1282_ead25fbf_2d4c_4d39_a3aa_cfea4653c955"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1283_d4db3d29_32d9_4471_b7ea_abcd01960dcd"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1284_78f02561_6f1f_48dc_a7c9_e743586ccef3"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183899Member"
      id="t_13_6e1c932f_0f54_ee75_c953_c336fead66e6">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_14_34a255e1_c995_ffe6_42a4_7b1a5d106a43">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_15_ecde101b_61bc_a546_f68a_a94381d431f8">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_16_ae83a3e7_3b9c_ca8a_81df_8f2190e0bb57">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183899Member"
      decimals="INF"
      id="h_1285_897cc9a0_4c21_4290_90c7_2fd4a78ced65"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183899Member"
      decimals="INF"
      id="h_1286_ed2e342e_5e98_4b0d_8eb4_f3992e5c820f"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183899Member"
      decimals="INF"
      id="h_1287_20396d21_7767_4369_bfb4_0c16d3cd6249"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183899Member"
      decimals="4"
      id="h_1288_de11faf7_4543_4817_875e_35f9b0f65ed4"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_17_1a872275_996d_b1a0_50d6_c67bc6988d58">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275106.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183899Member"
      id="t_18_f79e3396_6616_6904_42da_78e92e583110">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1289_f8144d3f_217a_416b_b264_209a77245b34"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1290_8c0d005c_a4f7_4017_8711_aee00b8c8d57"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_UnileverPLCMember"
      decimals="4"
      id="h_1291_c5628de1_566e_472c_9fa8_9ca2a463cddf"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_PernodRicardSAMember"
      decimals="4"
      id="h_1292_a75e8804_99fe_4ea3_87ae_d208790dac70"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_RioTintoPLCMember"
      decimals="4"
      id="h_1293_a5d299bb_bd65_45fd_9a81_bb8f9c7ad282"
      unitRef="pure">0.027</oef:PctOfNav>
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      contextRef="TI20240930_C000183899Member_CommonStockMember"
      decimals="4"
      id="h_1294_65049154_835a_47d0_897f_11cbccf76c24"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1295_9a21a32a_3e36_4ba0_a749_6c6a0f53f342"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_PreferredStockMember"
      decimals="4"
      id="h_1296_91c70a9d_719e_4128_a47d_12d2c450edf3"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183899Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1297_2f8657bc_9956_4c99_925d_81df97d47ab8"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000183900Member"
      id="t_1_ae75aaa2_02ca_5ef0_5b77_aaf0db76f72f">Janus Henderson Global Equity Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000183900Member"
      id="t_2_c73757a4_e593_cbf5_9ad1_73111bbc1869">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000183900Member"
      id="t_3_22ef2022_b05c_a902_af07_4a657ad8ac49">HFQTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_4_f9a6b6cc_feec_efa6_d0c8_52ba8031cd71">This annual shareholder report contains important information about the Janus Henderson Global Equity Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000183900Member"
      id="t_5_75c337db_00aa_fa05_4959_43ceba9e1bbe">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_6_a8992e9d_0212_dff9_fa58_4b648a6b161e">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000183900Member"
      id="t_7_020daa38_4e73_8a35_87b6_0eb29ab311c0">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000183900Member"
      id="t_8_d9f779a5_aae8_364b_d37e_255b6a017906">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_9_66fcbc40_48cd_d5db_e176_5f54f31dd700">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund&lt;br/&gt;(Class T Shares/HFQTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;103&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000183900Member"
      decimals="INF"
      id="h_1298_4cd53674_e644_4689_bf60_08d63278e587"
      unitRef="USD">103</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000183900Member"
      decimals="4"
      id="h_1299_d976b6f8_becd_47a0_b4bf_7fcb1597da33"
      unitRef="pure">0.0093</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_22_ccebc582_0a15_0594_cfea_e7787abea722">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Equity Income Fund Class T Shares returned 21.21%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the 85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index, returned 24.84%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;U.S. semiconductor manufacturer Qualcomm and electronics companies Taiwan Semiconductor and Hon Hai were key contributors relative to the broad-based benchmark, as enthusiasm for artificial intelligence-related stocks continued until near period end. UK bank NatWest and UK food retailer Tesco also contributed to results. NatWest benefited from the higher interest rate environment and its exposure to a strengthening UK economy, while Tesco saw stronger sales as inflation fell, making grocery spend a smaller part of household expenses.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Energy companies BP and Equinor detracted, as volatility around oil prices caused by escalating tensions in the Middle East and a weakening demand outlook hurt their share price. Korean technology company Samsung Electronics also hindered results as lower-than-expected demand for memory chips weighed on the share price. Daimler Trucks was another relative detractor as it experienced a slowing of orders within Europe and difficult performance in China due to the macroeconomic weakness of the region.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000183900Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275135.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_12_c55d76e8_e193_d3e8_04e8_2df9f83eb34e">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Equity Income Fund (Class T Shares/HFQTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000183900Member"
      id="t_19_066fad1b_ae95_5436_ce71_7d42d8418c7a">Janus Henderson Global Equity Income Fund (Class T Shares/HFQTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000183900Member"
      decimals="4"
      id="h_1300_6f015cbf_6607_427e_a2c0_7a499b1bd6e9"
      unitRef="pure">0.2121</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000183900Member"
      decimals="4"
      id="h_1301_52b6454f_8fde_45c9_9a08_ceb16315d113"
      unitRef="pure">0.0758</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000183900Member"
      decimals="4"
      id="h_1302_e98ce563_1c0c_4bad_aaf9_923b354e5b05"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_20_973ae4fa_db06_8611_1c6b_5bf7709b99d2">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1303_775e59ba_38f6_46c4_9220_cb023375edce"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1304_66dd6efb_603c_4072_8aad_9d2983e7d374"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1305_94a5b3fe_fa0d_43d3_8291_d6a84f940f00"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      id="t_21_fab24f0d_d48c_8272_5434_a79e21cb9e12">85% MSCI ACWI ex-US High Div Yld / 15% MSCI USA High Div Yld Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1306_c8126f10_e971_47a2_a73d_7ce6917de257"
      unitRef="pure">0.2484</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1307_79743aea_e6ba_4477_ab11_f41d32558471"
      unitRef="pure">0.0810</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_EightyFiveMSCIACWIExUSHighDivYld15MSCIUSAHighDivYldIndexMember"
      decimals="4"
      id="h_1308_63200d31_c8d8_42b8_97a7_747b918b36ec"
      unitRef="pure">0.0541</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000183900Member"
      id="t_13_9ae9d62f_79a1_7d75_497a_4dcfa16161de">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_14_79b066b8_4aef_c465_5b85_354ade869346">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_15_c4203cbb_7600_7fb0_1c24_165e9a38168e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_16_dda97d19_9e02_1a17_6354_00e70a7b9bbb">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,869M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;71&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;37.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;155&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000183900Member"
      decimals="INF"
      id="h_1309_67ef5eb7_1bda_4110_bd7b_3c99ce5809ef"
      unitRef="USD">5869000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000183900Member"
      decimals="INF"
      id="h_1310_38831caa_ac1c_4e07_ba85_68cb114c82fb"
      unitRef="Holding">71</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000183900Member"
      decimals="INF"
      id="h_1311_c5da6cf3_3361_4bdb_9675_912c061a080f"
      unitRef="USD">37400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000183900Member"
      decimals="4"
      id="h_1312_03f8b0ce_5e30_4e64_ad48_803ea1167e59"
      unitRef="pure">1.55</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_17_6a613bc5_f0c2_0167_9e58_931f2f01e2a6">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;93.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;3.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275145.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000183900Member"
      id="t_18_4de7704f_5ee3_0859_5cbf_2e69ec67de78">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;British American Tobacco PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Verizon Communications Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Unilever PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Pernod Ricard SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Rio Tinto PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_BritishAmericanTobaccoPLCMember"
      decimals="4"
      id="h_1313_c1e283b5_0041_4c2e_b332_6666b70ca573"
      unitRef="pure">0.039</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_VerizonCommunicationsIncMember"
      decimals="4"
      id="h_1314_d9441ced_877c_49eb_8f5a_13861d72df16"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_UnileverPLCMember"
      decimals="4"
      id="h_1315_a6b3c9a0_58e9_4faa_b559_72f340b5eee0"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_PernodRicardSAMember"
      decimals="4"
      id="h_1316_bef8e568_3173_4317_ac90_e3ab1cb22344"
      unitRef="pure">0.030</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_RioTintoPLCMember"
      decimals="4"
      id="h_1317_7e5ea271_0674_4b20_ac38_31c8c75979a5"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_CommonStockMember"
      decimals="4"
      id="h_1318_67e02b8b_c82c_4049_b6e0_9e6e8e5d2028"
      unitRef="pure">0.935</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1319_97762cc7_7932_4e21_bf95_d6227775c4d8"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_PreferredStockMember"
      decimals="4"
      id="h_1320_5b314aab_f789_4332_9836_050e5d6c53c7"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000183900Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1321_5df8ae21_8589_4788_a6d9_cdd0119ff664"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077752Member"
      id="t_1_70ba2f7d_eb5d_ffff_aecc_eedc32cf3a78">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077752Member"
      id="t_2_8c0255fa_e122_884f_7d04_9696d8d8bdb6">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077752Member"
      id="t_3_0b96d687_76d5_3195_790d_7ae7dd928319">JFNAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_4_42cd47b4_1ce5_7870_db41_96fbba3e3360">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077752Member"
      id="t_5_d8d3238f_d623_695a_53c3_5a6336430151">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_6_2a1e3b21_553f_d037_7f1d_7ecd41aae23f">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077752Member"
      id="t_7_6daad58f_a74b_d1b0_fed7_b38212866084">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077752Member"
      id="t_8_88868a21_1c50_68a8_6081_ab2b1e2e0d7c">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_9_08e7e47e_660d_a46f_e620_4e038fd8813e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class A Shares/JFNAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077752Member"
      decimals="INF"
      id="h_1322_3c6c595b_281c_4310_89a3_62e79e0c67e3"
      unitRef="USD">111</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077752Member"
      decimals="4"
      id="h_1323_6c47f035_6388_43e7_b613_1de2ad25cef0"
      unitRef="pure">0.0098</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_24_6922052c_d288_fd8c_457e_43a84dcd859a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class A Shares returned 26.28%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276812.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class A Shares/JFNAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class A Shares/JFNAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="t_19_85dfccbd_2941_a195_9407_3b1f8a1a7b2f">Janus Henderson Global Life Sciences Fund (Class A Shares/JFNAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1324_e7602828_7db4_4db6_b04e_2e6fa9dcb8e1"
      unitRef="pure">0.2628</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077752Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1325_c3b83138_2d15_4d92_bc8f_5106941dabf1"
      unitRef="pure">0.1402</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_1326_2712d95e_3d19_455b_ab5f_3f71ca3cf7e1"
      unitRef="pure">0.1080</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
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      id="t_20_44cecd1e_c80a_7e42_1036_938502baf91a">Janus Henderson Global Life Sciences Fund (Class A Shares/JFNAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_1327_eecc9073_e4fb_474e_8a5a_1a99b7780816"
      unitRef="pure">0.1902</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1328_ada79e1d_12b6_4d31_90f1_1e06bef6880b"
      unitRef="pure">0.1268</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1329_a8fa394e_821f_49f6_8c4b_dd7c1ea2a351"
      unitRef="pure">0.1014</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_21_f49afbae_c5f9_7f56_5974_c54de9154008">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1330_f89e49ff_33fe_434c_8fd5_f057f5874b60"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1331_96df472b_4ed6_4e08_933b_f809063eeb69"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1332_1a5a1293_b6b1_47ad_9386_b57fe0e4cfbf"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      id="t_22_9f064de8_a97e_8dd8_3270_d7509019ba45">MSCI World Health Care IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1333_188d06da_62f6_4bbd_874b_9a86c16af317"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1334_174f6fea_124c_4cb8_94b4_8a61022edd03"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1335_f02eaf03_d13c_44af_8afa_5e723812389d"
      unitRef="pure">0.0896</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      id="t_23_0b73ab83_ecc0_79bf_5862_2b6ee0987e49">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1336_0c7c7099_3f3b_407f_b5e3_59614adf4dcb"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1337_fe61768d_ad48_46f6_a2c5_f2bb06ebc8db"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1338_12c455ea_f1c5_46d7_8203_1e36d5691598"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077752Member"
      id="t_13_ccc018a0_fd9e_f618_1860_98ca5a9f6ce5">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_14_47010558_85a6_3ce9_3f64_5af9ca5dab87">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_15_27855bc0_933f_79f4_d7c8_b752e7dd17fd">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_16_7da4399a_231d_2e8b_46d5_abb5914c7a1c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077752Member"
      decimals="INF"
      id="h_1339_56941379_00a4_4c65_9d1c_72653c4f08a6"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077752Member"
      decimals="INF"
      id="h_1340_a7e0ed20_fa50_4815_8a86_762fb58236bd"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077752Member"
      decimals="INF"
      id="h_1341_7ce2dfda_812f_486f_a231_e3c165b2ef33"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077752Member"
      decimals="4"
      id="h_1342_f087aece_8ca3_4ece_b611_894d9d8d27a4"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_17_e799eb32_ffc7_6d4c_45ba_b06c39b6091e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276822.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077752Member"
      id="t_18_6a7fc86b_7c3f_e7e3_6fb0_ee0f6e498382">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_EliLillyAndCoMember"
      decimals="4"
      id="h_1343_df191244_0fbe_4c82_9b34_c3e3caccb83b"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1344_00840a59_57b8_4abf_8c3b_e2af1b24f04f"
      unitRef="pure">0.068</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_1345_72796924_1e85_483e_bc8f_ec3d0b213ff3"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_AstraZenecaPLCMember"
      decimals="4"
      id="h_1346_0d1fd84d_d1b9_4489_b84c_8f09d467c167"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_AbbVieIncMember"
      decimals="4"
      id="h_1347_68f75509_e9c1_42f0_8c8a_de55c987217d"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_CommonStockMember"
      decimals="4"
      id="h_1348_ab13b394_cb5d_489a_995d_ab91aa557381"
      unitRef="pure">0.984</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1349_4842a5c2_5597_4920_be46_f168394786e1"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1350_864f2a78_d6b8_47ce_b079_75d06ca318c0"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_PrivateInvestmentInPublicEquityPIPESMember"
      decimals="4"
      id="h_1351_2f057989_24c6_4e1d_acdc_47f5ff2a53b6"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1352_3a9f247c_f1d7_44b2_be04_bc806b1d5ead"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_ConvertibleCorporateBondsMember"
      decimals="4"
      id="h_1354_adeaadce_8366_47c3_aff8_1c00a6cb0c95"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_WarrantsMember"
      decimals="4"
      id="h_1354_449955ba_3b32_4893_866d_70945d39a605"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_RightsMember"
      decimals="4"
      id="h_1355_b30f7ec4_a186_4684_b93b_0c25f997d3b8"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077752Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1356_07b9f216_6763_4598_85dd_90bbb2f8b074"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077753Member"
      id="t_1_8211213f_dfa8_29a5_0697_21ce18f6606f">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077753Member"
      id="t_2_4200f7fa_3c15_1ca6_e7b4_5f3a20ef16ba">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077753Member"
      id="t_3_9056de43_21d5_e4ac_a029_e33d5ba4c33a">JFNCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_5_8d7007f2_35a4_47c9_74d8_5e03de6ed3f4">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077753Member"
      id="t_4_093eb006_24fb_4a10_0e95_c34dcd22831a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_6_deb2ccc6_87d9_933a_54f3_b86683637cca">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077753Member"
      id="t_7_17601205_0626_1a99_60c3_1c36de929c15">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077753Member"
      id="t_8_333c17bd_ce77_9765_62e2_e4eef1baeec7">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_9_91673067_f620_ec48_8b76_bfa5d5eee972">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class C Shares/JFNCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;196&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077753Member"
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      id="h_1357_4ab927b5_2216_4444_b130_04e085b7cff8"
      unitRef="USD">196</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077753Member"
      decimals="4"
      id="h_1358_87739a52_d3e0_4794_9161_10faa2a72000"
      unitRef="pure">0.0174</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_27_aecf77cc_e979_d4ca_c289_ce682da52fcb">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class C Shares returned 25.34%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276851.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_12_55a2330c_9ed2_857f_54e7_f526eb720061">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class C Shares/JFNCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class C Shares/JFNCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.34&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_1393_cbd0d19b_7ca1_1d3a_5bbd_1042869bda97"
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    <oef:AvgAnnlRtrPct
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      id="h_1368_0ed834b8_2747_47d7_bb6e_2f0ee33236f1"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_1369_2e4023f6_969b_4a72_95a6_8d1d9fee9515"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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    <oef:LineGraphAndTableMeasureName
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      id="t_23_22157979_5159_bff0_2eff_615078c2869d">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1371_4154232e_b0b6_4d66_8e3a_646e01b60751"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1372_393cfa2d_c004_4f15_b9c1_fde1fb7e6295"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      id="t_13_da31b302_6c80_2eac_5b54_55d58e37ff0c">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_14_459a0429_8f14_1c93_09d7_af58b779914e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_15_883f9a0f_75ac_4686_d494_ba47234d6a27">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_16_532e81fa_953b_bdf4_5ec4_ebdc1e4bb696">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077753Member"
      decimals="INF"
      id="h_1374_f65c7ad7_017f_452c_9cdd_97a4f6f892f2"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077753Member"
      decimals="INF"
      id="h_1375_78d88497_36b7_4eb1_91df_bb5782269ece"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_1376_83926ee7_cfb5_4ab0_8b30_5cac9ed6f530"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077753Member"
      decimals="4"
      id="h_1377_79a7f53b_dcc6_486a_9110_3aabb5c34a45"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_24_dd794ab2_8dcb_4f9d_27aa_586b984ee02b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276861.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077753Member"
      id="t_25_a9a8f481_e3bb_4b25_d380_5cf7b15ce6af">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_EliLillyAndCoMember"
      decimals="4"
      id="h_1378_22cbbf0a_7932_4d41_9423_33c3c6fbc1e8"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1379_ef328f1d_06ba_4507_9782_f8f4fc59f4ea"
      unitRef="pure">0.068</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_1380_251e9e5f_ce03_49ef_b0c5_afcb714923df"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_AstraZenecaPLCMember"
      decimals="4"
      id="h_1381_613c06ca_ebfc_42fc_9643_c3471d8c1915"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_AbbVieIncMember"
      decimals="4"
      id="h_1382_3cb7edf9_2bf7_4ea0_9bab_93c42499bd92"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_CommonStockMember"
      decimals="4"
      id="h_1383_e4f77df4_03f1_4242_8b0e_e02bd7dd1b0a"
      unitRef="pure">0.984</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1384_b9b925cc_21ad_41eb_b82c_19857520c194"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1385_1093be1d_6642_4172_a329_357336f0dc39"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_PrivateInvestmentInPublicEquityPIPESMember"
      decimals="4"
      id="h_1386_401b0cfc_7580_4ee5_aec3_18c6af35322e"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1387_537bb2e0_8ca6_4dba_b299_a420f0ad1b23"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_ConvertibleCorporateBondsMember"
      decimals="4"
      id="h_1389_efe9d793_0a9b_4a46_9bb5_c16caa179937"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_WarrantsMember"
      decimals="4"
      id="h_1389_723da296_fafe_4dfa_aead_0f124b492927"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_RightsMember"
      decimals="4"
      id="h_1390_d2b5669c_594e_4f8c_aa19_1decc8cfd354"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077753Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1391_5ba6f1c2_55e4_4a1c_a89b_ce440c80775d"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000083538Member"
      id="t_1_def46df9_90d6_965e_c301_47c15c1438b9">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083538Member"
      id="t_4_9efbdfbe_5c8c_a6e9_5973_ea7193caa33a">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083538Member"
      id="t_5_da06209f_d1ff_e9ce_a1b3_dea9f98363b7">JNGLX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_3_4bab81d5_7672_e018_9ac3_655d4c70d74d">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083538Member"
      id="t_2_b36a1869_d684_afa4_5693_d31d04cbf5de">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_6_d6c9a778_e602_21c4_02a5_cac835878d01">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083538Member"
      id="t_7_70e22f74_e965_adfa_a60b_4c3c6269ad72">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083538Member"
      id="t_8_ff3464a3_1b78_0e98_81d0_0787f532937e">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_9_acfd551f_a810_67b1_afff_296a03d994fc">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class D Shares/JNGLX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;91&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083538Member"
      decimals="INF"
      id="h_1392_51d9f03c_4420_40cf_8307_a30e3998b8ab"
      unitRef="USD">91</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083538Member"
      decimals="4"
      id="h_1393_e20b086b_68e4_481d_8443_dab2bc1e83f3"
      unitRef="pure">0.0080</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_24_136e1f24_5372_d29d_455e_61f329fb24f8">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class D Shares returned 26.52%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276890.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_12_6d23baba_af6c_3f8e_3e2a_3baa68902a90">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class D Shares/JNGLX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083538Member"
      id="t_19_7138317c_f5cc_d2d4_8512_950e6ee5adff">Janus Henderson Global Life Sciences Fund (Class D Shares/JNGLX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083538Member"
      decimals="4"
      id="h_1394_54fd623a_c39a_4709_a7d7_f9b25adc70b7"
      unitRef="pure">0.2652</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083538Member"
      decimals="4"
      id="h_1395_bea5dc6d_ef0a_475e_973c_f2d4e8ba8ec6"
      unitRef="pure">0.1422</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1396_c8534722_8fe5_497b_af8c_3fa837b990db"
      unitRef="pure">0.1100</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_23_0e637978_c8f2_cb46_eeb6_863bdabc46ec">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1424_f18dccb4_596d_c385_0074_b0e93bd35a15"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1425_3c8d3d88_a871_b206_9e3a_1ca00b13a6c5"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1426_6f1186ac_29dd_bf3b_e21f_36c0e839509b"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      id="t_21_f7001f50_15c4_9b7d_591b_91f7130ec901">MSCI World Health Care IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1400_6f6edb6d_fdef_45d3_b0f4_468e60fd7521"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1401_05233963_b13b_430d_9b65_90cf531f6235"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1402_df9996c3_380f_43ad_ba0f_10ea75922c95"
      unitRef="pure">0.0896</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      id="t_22_1515366f_7a02_bd98_18eb_25e2485493ea">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1403_0081f79f_e1ba_4ce0_b253_369771ec48ff"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1404_517130a2_a305_4cce_8130_878e6ed2fd95"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1405_4341afab_44f7_4a62_a370_960fde678a2b"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083538Member"
      id="t_13_d22f95f4_b46b_f0fe_083a_5710d25bbf5b">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_14_9d6521e5_94bf_d82c_fde9_df172a7d1f8e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_15_2b040a14_b710_6452_dde3_493e38c74175">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_16_e6b25ac4_ba5a_0df7_74f2_c2f8afb0ef6b">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083538Member"
      decimals="INF"
      id="h_1406_cd630dda_baeb_4dab_807a_c2dcf0af03cf"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083538Member"
      decimals="INF"
      id="h_1407_ac3b2e07_d066_4492_b695_77fd5bdb89bf"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083538Member"
      decimals="INF"
      id="h_1408_49497ce9_be69_4a34_abed_ff329a20026b"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083538Member"
      decimals="4"
      id="h_1409_8a06806c_02a5_4249_95ed_dfa9e9874be5"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_17_114f156d_043d_e28d_ea60_56d429a66475">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276900.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083538Member"
      id="t_18_f17945f0_7482_e967_04b6_d86b15f297cf">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      id="h_1410_cfa0c59c_e8c5_4a5c_a71e_0aab257bb0ec"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1411_c9d00a2b_331e_4da1_8ab5_41cd12c01e7f"
      unitRef="pure">0.068</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_1412_c671ea48_8db1_47cd_9306_416f473d9e2d"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_AstraZenecaPLCMember"
      decimals="4"
      id="h_1413_436b2b9e_959d_4e87_b58c_f0315b09424b"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_AbbVieIncMember"
      decimals="4"
      id="h_1414_6f4776ae_c3d4_4a8b_969a_9d5d390013d0"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_CommonStockMember"
      decimals="4"
      id="h_1415_5adda4a2_1a11_4854_b9d5_2bd863846a99"
      unitRef="pure">0.984</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1416_91846617_2a66_4e5b_ba94_670a8f0aab12"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1417_e4ba65f3_7dbf_4b26_aa18_13de665d20d7"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_PrivateInvestmentInPublicEquityPIPESMember"
      decimals="4"
      id="h_1418_1b5b3696_fe70_4195_9e5d_5867d5b13f93"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1419_59100b6c_19eb_4641_b6ce_8a94c05f523b"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_ConvertibleCorporateBondsMember"
      decimals="4"
      id="h_1421_1e1660ab_a4d0_430d_a1b8_163ba09988ba"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_WarrantsMember"
      decimals="4"
      id="h_1421_46ab6d8c_c958_49f3_978e_9d29dc1b2afb"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_RightsMember"
      decimals="4"
      id="h_1422_698bcae1_800f_44db_97b2_946540f3ab6f"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083538Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1423_bcad3345_9674_4b21_8321_02ff8babf3d5"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077754Member"
      id="t_1_b2919cb7_703b_5e5a_f904_fc88272ea65e">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077754Member"
      id="t_2_bb3c3113_49f3_64c7_c5e6_f4db63f1cc70">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077754Member"
      id="t_3_8bd4f4d1_4399_bb5b_d88d_573149a9cacf">JFNIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_4_90fd6ce0_b570_ae60_19fd_60f02075d40b">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077754Member"
      id="t_20_451c540a_84ec_c6d7_7606_b3afc37df17b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_5_4ad889be_42d4_0927_dd61_2a06ef199e37">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077754Member"
      id="t_21_ec3caa1e_04e8_c0eb_f024_5482d8664676">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077754Member"
      id="t_22_6e458a37_c4db_16c5_377c_b5635223f280">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_6_fe18b841_ce87_556b_d6bb_5328ea55880b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class I Shares/JFNIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;87&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077754Member"
      decimals="INF"
      id="h_1424_96bb63fc_227a_45df_91f2_f553e41cb1db"
      unitRef="USD">87</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077754Member"
      decimals="4"
      id="h_1425_df8a6633_3a61_48ef_98da_a86af9ef4246"
      unitRef="pure">0.0077</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_24_44ac7df7_4175_a3f9_0695_2e2e18520e33">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class I Shares returned 26.56%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_8_407f57b4_4f7e_40e3_365f_7bbc6951da7a">
&lt;div style="break-inside: avoid;"&gt;
&lt;div style="margin-bottom: 10pt;"&gt;
&lt;div style="break-inside: avoid;"&gt;
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276929.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
&lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_9_962e84f5_3474_36ec_eeab_7a2505c13c75">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class I Shares/JFNIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077754Member"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077754Member"
      decimals="4"
      id="h_1426_d94e6188_e529_4570_986e_d2dbecf623ec"
      unitRef="pure">0.2656</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077754Member"
      decimals="4"
      id="h_1427_4deee98b_91f9_43c0_8688_e010507b2c99"
      unitRef="pure">0.1427</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077754Member"
      decimals="4"
      id="h_1428_7766e60c_ba95_4306_ae67_dfff5a0c3348"
      unitRef="pure">0.1105</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_23_6d632d39_a3ca_14b8_5389_d3339ad334e5">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1456_2ab74539_82d6_ad42_e794_36d21a7c6cf2"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1457_293c8756_9e8d_67ac_439f_4e551408b31b"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1458_f69db098_a5c7_9264_dd50_391fd84ec528"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      id="t_18_bb824a70_4aff_713d_999f_35840af719ec">MSCI World Health Care IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1432_361b52b6_de05_41b0_b4f7_8a7018679cfd"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1433_ed257e51_77dd_49d0_95c4_adc113571606"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1434_00b771a8_ba3d_4121_9b70_9780d6534d1b"
      unitRef="pure">0.0896</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      id="t_19_11cdeb36_ce28_a6a0_66ce_2943e7ef3f47">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1435_93328fb9_0bb0_4d1c_b412_75fc534a52f4"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1436_e92ae705_14ff_4150_9a40_61c055778ef0"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1437_00a8bbef_cfa8_41b3_9a1a_610c4e4a248f"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077754Member"
      id="t_10_0015abed_59b6_ac64_ba38_adc6cb494bd7">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_11_6c7eaa95_5529_c4bd_f6db_d966c28cdff2">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_12_1cd6c7f3_b9f6_b80f_154d_7815b3ce5ef2">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_13_647098fa_436a_1662_c06e_fc0ed7c58732">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077754Member"
      decimals="INF"
      id="h_1438_ba2bcf59_234f_4015_8dbb_6f4b21ceb475"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077754Member"
      decimals="INF"
      id="h_1439_b0348b89_9c6c_4bf4_9605_598b51e7906e"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077754Member"
      decimals="INF"
      id="h_1440_fd543e2f_3e8b_4b2a_a0ee_5d5e267f54b3"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077754Member"
      decimals="4"
      id="h_1441_61d22cdf_a5d5_4abc_963b_62cc3a1a5a86"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_14_6f06dd9a_0c83_ca8f_658d_fdb3265345c3">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276939.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077754Member"
      id="t_15_d7c47009_1539_5537_1f82_fb718fc7e799">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      id="h_1442_8a320487_537c_4ffe_837b_26273d914d1c"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1443_eeca1080_02b7_4b9b_89cd_f6737ac0b330"
      unitRef="pure">0.068</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_1444_8e7e2e30_f30c_4f03_953f_cf2544e924e8"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_AstraZenecaPLCMember"
      decimals="4"
      id="h_1445_d78855da_8596_4b06_9979_bb2fe4e16cad"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_AbbVieIncMember"
      decimals="4"
      id="h_1446_441cd8bc_e220_44a2_8165_78a374388207"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_CommonStockMember"
      decimals="4"
      id="h_1447_ff1aee5d_f8e4_4849_bcec_4762bfa8dcb0"
      unitRef="pure">0.984</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1448_34f21901_4bd6_4af8_b422_b30f249451b4"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1449_cacfba00_b8e4_48e7_aefd_b7863c5e4e5b"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_PrivateInvestmentInPublicEquityPIPESMember"
      decimals="4"
      id="h_1450_be723f5f_fb55_49b1_b424_8f28b5b59054"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1451_3c133389_c480_4707_bf2f_a62981ed9828"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_ConvertibleCorporateBondsMember"
      decimals="4"
      id="h_1453_b76bfa13_27dc_4255_aa35_0e3fe5754e6e"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_WarrantsMember"
      decimals="4"
      id="h_1453_1ea53b2b_7b82_4850_84f1_1e24cd340d7f"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_RightsMember"
      decimals="4"
      id="h_1454_048fe6a0_3c07_446b_a37a_ff754b73ae24"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077754Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1455_179cab1b_eda3_41a0_ac57_b380df5318e8"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000198286Member"
      id="t_1_67793023_9c22_e6cf_0ba2_25dab6f8a9bb">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000198286Member"
      id="t_2_9585306e_3e7e_a469_1a39_cd887f11618a">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000198286Member"
      id="t_3_1ef3508a_8f38_f7db_3125_e6116fb13c65">JFNNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_4_cb61e2b4_898b_e934_e681_b7b98f37de7f">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000198286Member"
      id="t_5_8619bf22_70c3_580c_de68_8a3894fd3f13">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_6_5a7fa8e1_38e8_59e0_f413_15186fb016d1">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000198286Member"
      id="t_7_bebd100b_0733_6bb9_2e43_1fe890e8ab20">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000198286Member"
      id="t_8_b569fd1b_3d3d_9542_c382_4661de8f222d">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_9_1deeb85d_6669_eead_7fac_14eda7c7d0e0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class N Shares/JFNNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;77&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000198286Member"
      decimals="INF"
      id="h_1456_3b863be2_8ad5_4c56_8c62_fe406730b19d"
      unitRef="USD">77</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000198286Member"
      decimals="4"
      id="h_1457_5b6b1171_ef7f_4b19_a8b6_5a014d772116"
      unitRef="pure">0.0068</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_24_42f43566_7a47_8367_76f0_13870ee38351">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class N Shares returned 26.69%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_11_ddee8611_a250_e46a_35c4_189eeaa735b5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276968.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_12_c1f8ab45_32ce_d8d2_4005_b5ab8e9dec69">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class N Shares/JFNNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000198286Member"
      id="t_13_076087bd_47d8_d146_0ee1_1caa5eb934df">Janus Henderson Global Life Sciences Fund (Class N Shares/JFNNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000198286Member"
      decimals="4"
      id="h_1458_a0668c46_507c_4aac_b80e_1716bb42d373"
      unitRef="pure">0.2669</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000198286Member"
      decimals="4"
      id="h_1459_9c92a476_dd78_4223_b8c0_a230fc5b6d2e"
      unitRef="pure">0.1437</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000198286Member"
      decimals="4"
      id="h_1460_0ecf1805_04bd_4363_a473_a528bdcee80c"
      unitRef="pure">0.1106</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_14_7f38682c_e06b_b28a_36de_0efc569c36f1">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1461_dd11989d_a602_47e4_a0a0_020aa05ba2cd"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1462_24539242_43b5_4717_95c1_664d2b183d02"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1463_8597defa_299f_4baa_9362_0aef1f8b42d0"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      id="t_15_0c2451f3_5bd5_01e8_6216_f1c40543bc55">MSCI World Health Care IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1464_bffe0738_c014_4cef_a9c2_f712b6686c94"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1465_3445c568_7a19_47b4_8dff_05e65b084864"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1466_b890fd76_7277_484c_b453_17b96e05fe4a"
      unitRef="pure">0.0896</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      id="t_16_5eb4615a_17c7_a5c7_cc3f_6cc5be986bb4">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1467_2bd6bc0b_a50e_45c2_9b9b_969deadc5da1"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1468_99e735fb_0509_4604_93b4_aca44b19a37a"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1469_e366abe2_2a1a_4f76_aa85_a3294ce8ad25"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000198286Member"
      id="t_23_59d3a14b_7cae_dc9c_2151_2f30a98d84fd">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_18_5d3b34d7_9d0e_ba0f_8919_402ece9305c3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_19_c51ec1d8_481b_385b_2860_eb5dd9ba2523">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_20_776990bc_1dbc_6afd_7c44_443087160fff">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000198286Member"
      decimals="INF"
      id="h_1470_63da59eb_2ed3_4a40_adf9_7ce405ceabce"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000198286Member"
      decimals="INF"
      id="h_1471_935d7f6f_20c4_493c_95c8_06f45a4b1ef0"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000198286Member"
      decimals="INF"
      id="h_1472_3969632f_b241_48e8_aa91_b346d1681ab8"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000198286Member"
      decimals="4"
      id="h_1473_546261f9_d48a_4296_b181_622e8ac15f5f"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_21_85c624bf_e662_6fbd_7a6f_ea95946cded8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276978.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000198286Member"
      id="t_22_2250826d_a4e7_a57f_ae8d_04241b14803d">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_EliLillyAndCoMember"
      decimals="4"
      id="h_1474_d14a35c9_0138_45dc_b80c_4d98fd9ff0c4"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1475_d088900e_f6b0_40c1_8a36_13745939ff56"
      unitRef="pure">0.068</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_1476_762fff1c_463e_4f08_bf1d_0df4f25ad07c"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_AstraZenecaPLCMember"
      decimals="4"
      id="h_1477_d98ab5ad_88f0_4f77_91fe_ccea97aa1cd9"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_AbbVieIncMember"
      decimals="4"
      id="h_1478_8a13f66c_bf76_4c24_91c5_01682220cb6d"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_CommonStockMember"
      decimals="4"
      id="h_1479_6ea24198_d7fe_4de6_ae83_617acce756ee"
      unitRef="pure">0.984</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1480_29cdf10a_48dc_4af1_a213_a05accc43c59"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1481_d086f0e9_1809_42d7_a7d6_9507ed608a2c"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_PrivateInvestmentInPublicEquityPIPESMember"
      decimals="4"
      id="h_1482_56bf5068_927e_43bb_80ca_b3d7b42b30e0"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1483_8a827bf7_d6ec_4d13_92e0_18e298bdb750"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_ConvertibleCorporateBondsMember"
      decimals="4"
      id="h_1485_3827aada_b6aa_463f_b28c_7093b4312750"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_WarrantsMember"
      decimals="4"
      id="h_1485_ef8f7661_4998_46fe_b1cf_cbca61836bc6"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_RightsMember"
      decimals="4"
      id="h_1486_822eb152_25db_481f_b3e2_2cfe700ce698"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198286Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1487_85806011_7753_48c7_a1ac_cc8e25d8e947"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077755Member"
      id="t_1_76a4264a_08ef_a557_afc0_aa2ae1ffb3fc">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077755Member"
      id="t_2_5c2c3ace_6c03_2ee3_f922_a002e50f7167">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077755Member"
      id="t_3_3901074c_e926_80fc_2157_76532af93f32">JFNSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_4_19c40df7_8c03_11dd_1c42_c43fb55926f5">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077755Member"
      id="t_5_5457fd94_68fb_3a99_26a9_4a9cbf09e904">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_6_c3f05e64_b4d0_ef70_23f3_59803203b314">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077755Member"
      id="t_7_0ed0e18c_fdae_8ce6_adfa_2a3c503d5fe9">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077755Member"
      id="t_8_f869743a_2428_2bc9_0a45_410d42065fb1">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_9_ee9c7d9d_fec4_2378_2210_6e462695a4fb">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class S Shares/JFNSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;133&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077755Member"
      decimals="INF"
      id="h_1488_561cf35c_6d97_4359_8092_d7685d82ba2c"
      unitRef="USD">133</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077755Member"
      decimals="4"
      id="h_1489_d976715a_9d16_45bc_a4e2_7a2a49a17eae"
      unitRef="pure">0.0118</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_24_ba0d9d56_b757_967a_943c_ce5f5d7105d0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class S Shares returned 26.04%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_11_9a901199_bc57_6033_718b_d2085ab3859a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277007.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_12_06c3e8d9_6913_e5b2_67d1_8692c4042b26">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class S Shares/JFNSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077755Member"
      id="t_13_6cb0e471_d33f_90fd_c960_28245a71e0f1">Janus Henderson Global Life Sciences Fund (Class S Shares/JFNSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077755Member"
      decimals="4"
      id="h_1490_c4f1a518_3467_42a5_8ebc_ee162d436170"
      unitRef="pure">0.2604</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077755Member"
      decimals="4"
      id="h_1491_15a6fead_2fcd_4b0d_9f02_ab5b7e17dcca"
      unitRef="pure">0.1380</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077755Member"
      decimals="4"
      id="h_1492_31e176e2_a024_4638_ba54_ace5afbfe298"
      unitRef="pure">0.1060</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_14_73abbaaa_a3b2_0d8d_f5e8_da01b157d3da">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1493_e1d5b916_7c83_48d0_a2fd_d71ccd7fc147"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1494_7310871f_891a_4cb3_a8a1_048d7ec77874"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1495_2e8b5fcb_cfeb_4464_9398_b6bbc1b0bd07"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      id="t_15_13ce9c5d_e5ad_9a15_5431_b743d4360dbd">MSCI World Health Care IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1496_5f1ecd32_a7a1_4280_b94e_a088340a7e98"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1497_a527d653_4fe4_4443_ba6e_fda47259b185"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1498_a0902002_479d_4b30_9cda_44df8e64d9d4"
      unitRef="pure">0.0896</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      id="t_16_2743de39_d3df_94f9_10be_a46bfa88e1c6">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1499_3288d00e_f472_45a1_afc5_7b93a61adc9f"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1500_4302221f_a092_4cda_a4f8_2671d788a24e"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1501_728e6703_c53e_4ce8_9503_fc2d989fbe99"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077755Member"
      id="t_23_a710dd3e_8d8d_1f02_c6ff_9fc09009f6e6">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_18_03e49a68_3871_6b3f_2b3e_7c762a49a4f3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_19_485a8d9d_a379_e89c_1836_3b92a8b434e5">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_20_c5e3e337_82e7_3883_8342_2277fd9282cf">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077755Member"
      decimals="INF"
      id="h_1502_b2763c62_c549_47b7_8c7d_460b2a00e5cd"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077755Member"
      decimals="INF"
      id="h_1503_182d350f_7bba_4b25_8f73_c026ec369591"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077755Member"
      decimals="INF"
      id="h_1504_9a64ce27_22b3_4d29_ad98_13d00dacd5d8"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077755Member"
      decimals="4"
      id="h_1505_5b7ddc85_1451_443f_9e72_1621d4ff0e7d"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_21_a3ad9c30_c6f1_4182_954e_515247907a49">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277017.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077755Member"
      id="t_22_ce546102_f4ba_9bcd_f28d_a9208a414905">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077755Member_EliLillyAndCoMember"
      decimals="4"
      id="h_1506_e2ab04f0_9917_4810_80d6_34407eadf4ed"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077755Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1507_c4572a65_a3e3_4426_ae55_1c97d543cad7"
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    <oef:FundName
      contextRef="FY2024_C000028956Member"
      id="t_1_a01c9860_6079_4bad_495f_bf9406919a4a">Janus Henderson Global Life Sciences Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028956Member"
      id="t_2_c196934d_a73f_c294_928d_8aca11d6fd6d">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028956Member"
      id="t_3_9ebb2d26_8a4b_a91e_e026_af7349574110">JAGLX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_4_2971be1b_cfb2_6a98_68fb_33277344e2fc">This annual shareholder report contains important information about the Janus Henderson Global Life Sciences Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028956Member"
      id="t_5_c084d468_858b_9056_23bf_7cba0258c6e8">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_6_3e29086f_244e_b1cb_6b0c_3e91ff905644">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028956Member"
      id="t_7_62c1f58d_c425_78a0_df74_5658ef7b68b7">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028956Member"
      id="t_8_64c701d4_7f17_40dd_a216_a490c7744b22">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_9_7f4a2b45_43e1_7f2f_11dd_2b455c169088">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund&lt;br/&gt;(Class T Shares/JAGLX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;103&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028956Member"
      decimals="INF"
      id="h_1520_bb28ac45_311a_4fc3_8753_cf134c598641"
      unitRef="USD">103</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028956Member"
      decimals="4"
      id="h_1521_61ae43c9_0faf_4b47_b804_77849885e42a"
      unitRef="pure">0.0091</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_23_9bda6314_9474_8b91_18bf_8bdf0b72ab5a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Life Sciences Fund Class T Shares returned 26.38%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;, returned 20.84%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vaxcyte was a key contributor relative to the performance benchmark, aided by positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease. ImmunoGen, another relative contributor, has sought to develop antibody-drug conjugates to improve cancer treatment. The company was acquired for a premium by pharmaceutical company AbbVie, benefiting the share price performance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;89bio and Akero Therapeutics detracted relative to the performance benchmark. Both companies are seeking to develop treatments for liver disease, and both faced uncertainty around clinical trials that pressured their share performance. We felt these concerns were unwarranted and held onto the stocks.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_11_99b48262_dc09_608b_5205_5f9ae549df5b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277046.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_12_36b94e42_b740_0c0f_e3f5_b1d5ca50fc49">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Life Sciences Fund (Class T Shares/JAGLX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Health Care Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028956Member"
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      unitRef="pure">0.2638</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1523_41cfb5a6_098b_4ee8_b04d_5b26e8b53338"
      unitRef="pure">0.1410</oef:AvgAnnlRtrPct>
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      contextRef="TenY2024_C000028956Member"
      decimals="4"
      id="h_1524_509da476_ca9d_4e85_bb95_ca34432248d3"
      unitRef="pure">0.1089</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_14_c4741d69_3eb3_d317_3e60_242f53e8c776">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
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      contextRef="FY2024_MSCIWorldIndexSMMember"
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      id="h_1525_961d6816_8bc9_492d_a8be_9068e8a45b84"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1526_26ce6a9e_bd76_4921_b43b_74a01a6e2140"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1527_5e351752_677f_4f34_b30c_deeaef783634"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      id="t_15_27010ce3_4c14_7d5b_0976_270c09ad995b">MSCI World Health Care IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1528_263dece0_59e0_419c_a906_c691f35513de"
      unitRef="pure">0.2084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1529_3175236a_e9ff_4a5b_bf72_5bb3ea8e65cb"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldHealthCareIndexSMMember"
      decimals="4"
      id="h_1530_fa702a7f_4cd6_4a42_85cd_2e545e8d6018"
      unitRef="pure">0.0896</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      id="t_16_69a8db3e_ddb0_a2aa_84c1_751af955060f">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1531_d8da9613_dabc_45b5_9bed_497b4dba2c15"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1532_40648f7a_5176_4b73_9e73_0209ce6387cc"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010494IndexMember"
      decimals="4"
      id="h_1533_a5fb0a6e_b4ea_4c04_a3b1_c3f754d532ec"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028956Member"
      id="t_17_773aeed9_de9d_73ba_8009_eb7bd66c873d">Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_18_2596c875_e586_7d54_8772_26659578c34f">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_19_ecbd0705_2b88_9989_a101_4b0eb3c9d4f4">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_20_f1c57125_9f31_5782_11a7_e9f1c01efbbd">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5,732M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;113&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028956Member"
      decimals="INF"
      id="h_1534_7083a6d5_997d_4bc8_bbaa_dca36da3d4b9"
      unitRef="USD">5732000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028956Member"
      decimals="INF"
      id="h_1535_651cd581_c4a1_4dc6_9d05_9c627c980589"
      unitRef="Holding">113</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028956Member"
      decimals="INF"
      id="h_1536_fc482ef7_e12b_418d_ae68_a701ae8bcb5c"
      unitRef="USD">32800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028956Member"
      decimals="4"
      id="h_1537_928ee7ee_d095_4461_b8ff_b9a972583872"
      unitRef="pure">0.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_21_54982b53_675f_d91b_4827_e801c41b462b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Investment in Public Equity (PIPES)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Convertible Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277056.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028956Member"
      id="t_22_9955f36f_a3d8_3998_39cc_039fbe80d9d5">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Eli Lilly &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;8.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Novo Nordisk A/S - Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AstraZeneca PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_EliLillyAndCoMember"
      decimals="4"
      id="h_1538_186e06e6_831f_4713_a3e8_e563cf3c3ef0"
      unitRef="pure">0.084</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_1539_4107ed27_79c2_491a_96ae_741b0cd1db0b"
      unitRef="pure">0.068</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_NovoNordiskASClassBMember"
      decimals="4"
      id="h_1540_e7b74397_0437_4226_8016_c582d40eb777"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_AstraZenecaPLCMember"
      decimals="4"
      id="h_1541_be54e3ce_ca02_48d3_8b74_40d5cd084627"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_AbbVieIncMember"
      decimals="4"
      id="h_1542_9a729f00_fe9a_4a5d_adbd_b237afa9b85d"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_CommonStockMember"
      decimals="4"
      id="h_1543_c42cabe5_050c_4445_a32a_0a93c15f39df"
      unitRef="pure">0.984</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1544_1487ed09_1a42_4245_8b00_0a5c3045d0d0"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1545_f896d882_3742_44eb_8a34_46a0f6ac260b"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_PrivateInvestmentInPublicEquityPIPESMember"
      decimals="4"
      id="h_1546_e151316b_6ef8_4bb5_ae9e_c63d703a88df"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1547_a236a85b_f5bc_4cc7_b32c_499e61a7f8f3"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_ConvertibleCorporateBondsMember"
      decimals="4"
      id="h_1549_301c99ec_9923_4da0_8536_747f091e832f"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_WarrantsMember"
      decimals="4"
      id="h_1549_eb709414_2434_48f4_afa2_6dfeb7cbfcd1"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_RightsMember"
      decimals="4"
      id="h_1550_f7bae6c2_8a2d_4a9d_a232_bf1faca40963"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028956Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1551_85cd2d29_74f9_4340_8c1b_db50391bc89d"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077597Member"
      id="t_1_3ffd887f_0d50_2808_3a26_e95a32ff2f6b">Janus Henderson Global Real Estate Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077597Member"
      id="t_2_a673ccb8_f72a_c244_b7cc_2667a7355215">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077597Member"
      id="t_3_f7832ee7_143e_adac_ba51_e14b6c405ecd">JERAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_5_ec526e4a_3364_9198_3f9d_f582d8e0f1f1">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077597Member"
      id="t_4_985f038a_d784_f605_de30_fa8c6a9edbf0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_6_cfedc714_d3e7_ad75_6a3c_e5be054f6492">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077597Member"
      id="t_7_0034faaf_c8bb_9263_6a2e_6f4c52c96dea">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
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      id="t_8_966a4f28_c83e_9d29_5626_ea2851f02c71">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      id="t_9_44b79af5_7a7e_7b8c_bf7b_9429fb8d3f36">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_10_0a828a6e_6a33_58ac_5d16_1bf58a8a5676">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class A Shares/JERAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;112&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">112</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_1553_39351d19_9b70_4d2c_b5cb_41829ae2c665"
      unitRef="pure">0.0099</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_28_22378979_0ac8_72c7_1410_6db3860a7600">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class A Shares returned 25.87%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273185.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_13_fd0e53d8_003f_8b9d_e473_0142ddcf3b52">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class A Shares/JERAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class A Shares/JERAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="h_1555_e7e49cf6_2c57_49a7_b1ac_aa899260dfc4"
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    <oef:AvgAnnlRtrPct
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      id="h_1556_13aaef54_6950_4de3_9736_4c88bc363b9d"
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      id="h_1557_16d8c127_ddf8_4349_be76_b3fcc2fbac45"
      unitRef="pure">0.1860</oef:AvgAnnlRtrPct>
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      id="h_1558_6db0f234_6b82_447a_be82_5a5db7a0d5a6"
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      id="h_1559_d446d009_1937_4d22_84c1_db246262ecfa"
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    <oef:AvgAnnlRtrPct
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      id="h_1560_fd4b9f0c_beae_49ca_a7a0_5e64a069419b"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1561_d5560b24_fd63_4599_9216_04171ff59f9e"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_1562_29f100f2_ff54_4dc1_8cb3_9fb325f31ed6"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
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      id="h_1583_887dc1ef_9f67_86a6_2f4e_2fb7822f2a29"
      unitRef="pure">0.2906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1584_2f56a257_c83a_768c_5c04_580605aed05f"
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    <oef:AvgAnnlRtrPct
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      id="h_1585_30dd060f_5205_e200_ef80_0387917c73da"
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    <oef:AvgAnnlRtrPct
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      id="h_1566_54ea9987_9aca_400b_a735_fb7e88086886"
      unitRef="pure">0.2780</oef:AvgAnnlRtrPct>
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      id="h_1567_f062010f_1417_4994_a72d_de953904b6ca"
      unitRef="pure">0.0084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalNetIndexMember"
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      id="h_1568_ea805d8d_6d40_4e75_8346_21869ed94c78"
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    <oef:PerformancePastDoesNotIndicateFuture
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      id="t_16_43e79f51_5454_49b7_6ff6_1ad4d930e0b7">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_17_11ce2263_c004_5866_be4c_fb615da3a212">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000077597Member"
      id="t_18_8130ad27_2dac_e241_e01e_8b569011c51b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077597Member"
      decimals="INF"
      id="h_1569_8ff51c02_3c2c_4228_ab25_d6622680d920"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077597Member"
      decimals="INF"
      id="h_1570_5ab5ba67_56c3_4ebc_afaf_6e27fa6cbb11"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077597Member"
      decimals="INF"
      id="h_1571_f38dbb2e_1029_4b6c_8c6b_f94a0dcc0400"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077597Member"
      decimals="4"
      id="h_1572_24bb8a5a_b044_418d_b8b2_840f6809c1c6"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_20_ae9503e6_8d7c_a750_110c_917f815711df">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273195.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_21_98142bf9_e165_2b1a_e1ae_e2851206d61b">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_EquinixIncMember"
      decimals="4"
      id="h_1573_872330b7_bcd9_4aff_a401_3235ee8b9eff"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1574_90a6374d_6d66_46ee_8ec5_4724bd82e42b"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_PublicStorageMember"
      decimals="4"
      id="h_1575_81cb8552_a169_4206_afd7_8dcfac80cb5c"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_WelltowerIncMember"
      decimals="4"
      id="h_1576_3ed37a26_75ce_46fa_a0c4_7001309b7993"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_PrologisIncMember"
      decimals="4"
      id="h_1577_7cc04e27_e180_4d25_b20e_02190244f4e4"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_CommonStockMember"
      decimals="4"
      id="h_1578_24f43a3e_bf34_42e9_8e33_f08b426bb1ea"
      unitRef="pure">0.995</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1579_df8f2d45_d316_485e_aafd_afeace3b6038"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1580_accde802_aebe_4449_bc66_0af0664a312e"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_RightsMember"
      decimals="4"
      id="h_1581_d94bef78_d2c3_47fb_9f1c_c622ac43aba7"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077597Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1582_ca71da97_02df_4fc7_954b_9781ff2367fe"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_22_540550af_36a9_0d5c_f706_164c680fec5a">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077597Member"
      id="t_24_4e219ab2_768d_0917_15ef_256f3d9b4696">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077598Member"
      id="t_1_5480d292_59e0_27c4_b31d_5d4bb26d923e">Janus Henderson Global Real Estate Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077598Member"
      id="t_2_2443232c_92cd_2a46_52e6_776ee0837a0e">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077598Member"
      id="t_3_8e196572_b84a_0720_77f9_409c5ab62f18">JERCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_5_ac26432e_e8fe_b3df_8f18_2bc020599091">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077598Member"
      id="t_4_b0ede9d0_55bc_901d_b7f8_d26ee1aec4fd">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_6_3195a41d_bdec_da6e_6002_d040f61dc9d4">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077598Member"
      id="t_7_49ed40cb_1f3d_c2b4_5e2f_b73031e7ee1b">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077598Member"
      id="t_8_0dd4b1da_b7a8_2563_297e_51a6cacface8">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_9_788da747_017d_c009_3a29_3af426502ddd">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_10_43e8c78e_b8f8_58da_9f8d_cb64b6bc6c3b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class C Shares/JERCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;201&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_28_8fb90cce_5f9c_c9a9_7a39_e036b8889da3">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class C Shares returned 24.87%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273224.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class C Shares/JERCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;24.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class C Shares/JERCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.87&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_18_6020caa8_7736_9579_78c8_28305cc121ee">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      id="t_19_ec8e815e_433a_f818_e004_bf501394643c"> The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077598Member"
      decimals="INF"
      id="h_1600_83c1d9f5_df46_43ab_a29b_b1ae76718392"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077598Member"
      decimals="INF"
      id="h_1601_7fa52110_6324_4e6a_8235_c8f6437a4b79"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077598Member"
      decimals="INF"
      id="h_1602_d8056860_f929_4485_b04c_c061100f26cb"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077598Member"
      decimals="4"
      id="h_1603_00ae2b64_afba_437a_8cf0_e3841311ad9f"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_21_841ad08d_51eb_93fe_d09a_8b554fbd6fac">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273234.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_22_485c8a48_bfde_935d_ebb0_934a743bd1be">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_EquinixIncMember"
      decimals="4"
      id="h_1604_535e314c_6f68_42cb_826d_69bb85478057"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1605_3751de4c_cd15_4678_ba64_a7f4615f5034"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_PublicStorageMember"
      decimals="4"
      id="h_1606_ff15c251_6592_497c_ae24_d733b5b3e415"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_WelltowerIncMember"
      decimals="4"
      id="h_1607_ba0ee70f_c48c_421d_aa1e_4d69ad3e9f1f"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_PrologisIncMember"
      decimals="4"
      id="h_1608_3ff825b3_628a_4b2a_bec6_f8f8a99ad6b3"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_CommonStockMember"
      decimals="4"
      id="h_1609_91280e52_12c8_4b96_9fa2_899a99f53f53"
      unitRef="pure">0.995</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1610_b68a2769_58d8_400b_a94c_6a412332e5f4"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1611_178dc432_af58_4509_afcb_cb9cd9a6dd3e"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_RightsMember"
      decimals="4"
      id="h_1612_c91521a7_9f0b_4bc8_83d3_9c48d13f5da4"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077598Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1613_35c34fc8_1750_4d3d_a07c_ed19717b04e9"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_24_7ce8ae3d_bb43_e4cf_cc44_0008ba9ba1d7">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077598Member"
      id="t_26_e0452094_433d_24f0_25b4_413601edf810">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000083540Member"
      id="t_1_1c5af829_e084_75ae_9341_073bc9d340d8">Janus Henderson Global Real Estate Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083540Member"
      id="t_2_dda8717b_405a_3a0e_6470_040b208973b2">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083540Member"
      id="t_3_81ccda5e_23e5_379d_842f_05d388124b3d">JNGSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_5_9b951d84_f1a0_3f5c_2e3e_c76b972900a6">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083540Member"
      id="t_4_87bfedc1_c2fd_af5c_fd58_87b473c417c0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_6_c6d660e6_6755_68f4_4fa7_e674e416880a">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083540Member"
      id="t_7_53bed7ca_2546_d90d_0519_052a26a7316e">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083540Member"
      id="t_8_c2cdf129_0ec9_425a_ef60_62dc87773104">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_9_25bb9ac9_f34e_113b_6d68_9f1c80f62f42">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_10_40df3a99_6c7d_50ca_54a4_a981b84ae8ca">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class D Shares/JNGSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;90&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">90</oef:ExpensesPaidAmt>
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      id="h_1615_11e338ab_22d0_4267_b95b_62f28f753eb3"
      unitRef="pure">0.0080</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_30_2156c44d_565e_4f80_7a59_47824a6476a5">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class D Shares returned 26.15%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273263.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class D Shares/JNGSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2615</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_1617_d6927ba3_e4c8_4125_b0e3_ebeca9aff013"
      unitRef="pure">0.0303</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_1618_ba866160_940c_475b_a6c2_7fe437c6d49a"
      unitRef="pure">0.0581</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_25_76634f95_fdec_8bd4_f975_64bdbf9e7921">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1619_d07c9c1f_6e0e_44d0_be20_d1e151e35288"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1620_bf7f7d12_1906_48c6_b8b7_321e2bbbab87"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1621_6933c828_50a0_4b9f_bc0f_ec38f2d2d544"
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      contextRef="FY2024_FTSEEPRANareitGlobalIndexMember"
      id="t_29_e14fe810_668a_2102_0553_f3070118b45c">FTSE EPRA Nareit Global Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1642_a4417b9a_2cdb_25f3_77c1_0fff82e6e21b"
      unitRef="pure">0.2906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1643_7e191a29_94e2_a691_5db2_69e1b0f5a995"
      unitRef="pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1644_6077334c_ec0a_3c50_96ed_aa231a398d0f"
      unitRef="pure">0.0467</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_FTSEEPRANareitGlobalNetIndexMember"
      id="t_26_bb5b31b7_e46f_7e44_6a28_fe7cbbe3cbd3">FTSE EPRA Nareit Global Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1625_9d9b5224_67c3_4393_8817_40921de244ab"
      unitRef="pure">0.2780</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1626_25c7222f_4b45_4296_a0bd_5c9964f0be92"
      unitRef="pure">0.0084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1627_f279d8ef_d39f_4b21_be75_a61e6154b0cc"
      unitRef="pure">0.0376</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000083540Member"
      id="t_14_7096ecd2_6954_afe5_c50f_b905815a58c1">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_15_bb2a1cf0_b1e0_05f9_b0e5_e6a22f02ce15">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_16_49a151a0_335e_ee10_dd5e_e9cbcddaeeaa">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000083540Member"
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_1628_854f49c2_03e4_442b_a88e_6c2514a99583"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083540Member"
      decimals="INF"
      id="h_1629_afbf5bd6_77bb_4e95_a6f0_8fcc91352cc7"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083540Member"
      decimals="INF"
      id="h_1630_e6296684_375e_4873_b414_9e32460d1707"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083540Member"
      decimals="4"
      id="h_1631_d1c635bc_40fd_4ce5_9090_b2ffe566da36"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_18_45f5f542_d7fb_d773_7bb9_2856be0d2c08">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273273.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_19_6e8a6de2_8c97_fcca_ebfc_ce4641342f87">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_EquinixIncMember"
      decimals="4"
      id="h_1632_c1df0e7d_e27a_4979_b156_a018bb47840a"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1633_ffd79902_86f0_4339_b1d7_69e6b6781272"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_PublicStorageMember"
      decimals="4"
      id="h_1634_01f7b17a_f70c_4eb9_bbe2_3bbc0caf4758"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_WelltowerIncMember"
      decimals="4"
      id="h_1635_6f9b09cd_de37_4b70_b2fc_ece34fdcc15d"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_PrologisIncMember"
      decimals="4"
      id="h_1636_e8cd2081_e7e8_4b5e_bb47_84e2dc148818"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_CommonStockMember"
      decimals="4"
      id="h_1637_e944d645_b772_45c5_8fa9_4df049cd8a20"
      unitRef="pure">0.995</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1638_a80f3236_aa03_4a8a_bbbd_b691b3ae218d"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1639_bd3f0f96_9865_4ff4_ab33_d0190908e07e"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_RightsMember"
      decimals="4"
      id="h_1640_ac3b6475_3395_4a00_94c2_e4e476123a5a"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083540Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1641_8df8cee9_8a6b_497d_ad6f_45742741808d"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_27_790e2035_b152_a449_3f1a_77ba18af03cb">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000083540Member"
      id="t_28_e892925d_c0da_6eb6_475b_cca00cf4bf1c">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077599Member"
      id="t_1_0f501009_d451_2aa7_f075_c6d27dab9f7b">Janus Henderson Global Real Estate Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077599Member"
      id="t_3_5d583bcd_472c_0c51_b1f4_b1c4121f155e">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077599Member"
      id="t_4_3aca52e8_b7a3_109e_30ea_433ffb36e8e9">JERIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_5_e63a0664_2bd7_f06c_2853_a274fdf3c4f8">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077599Member"
      id="t_2_2006ea40_d2bf_0721_e3f4_a72dab82d88a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_8_05e4d11b_0310_d103_5b49_d40ff5ddfd99">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077599Member"
      id="t_6_9a6651d5_d693_8d56_d00c_4f0503945be7">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077599Member"
      id="t_7_1e9689c5_104a_cced_5964_6572bab5dbdf">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_9_bdc66640_1bfc_2dc8_0860_10ac4403c7a3">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_10_b83c78e1_b3c5_1a5b_6fde_8d6128c0fac4">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class I Shares/JERIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077599Member"
      decimals="INF"
      id="h_1642_984b6c93_c52b_4a96_8aba_01e7562a1266"
      unitRef="USD">83</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077599Member"
      decimals="4"
      id="h_1643_135eeb31_3b9b_4661_8b17_76465bd506b1"
      unitRef="pure">0.0073</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_27_4a6a2518_2427_770c_ad17_9372411d3670">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class I Shares returned 26.17%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_12_5b6c0478_35a3_a511_ed02_62b26f27ba74">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273302.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_13_2a095fab_2157_60ed_46a5_8ed1443019d5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class I Shares/JERIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077599Member"
      id="t_20_43bfc2c4_ff6d_96c3_883b_5ceb04c75510">Janus Henderson Global Real Estate Fund (Class I Shares/JERIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077599Member"
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      id="h_1644_adf47e47_8d22_4c54_87a0_48b1cf966885"
      unitRef="pure">0.2617</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1645_dff77d1d_0811_41e3_9927_cf1b17fdc81d"
      unitRef="pure">0.0308</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077599Member"
      decimals="4"
      id="h_1646_ac374e0a_d98c_49c9_b2ae_b2a4151c4118"
      unitRef="pure">0.0589</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_25_d0c69ecd_2460_4b4d_65de_f5f0f05d1dde">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1647_33d6ff0e_aad1_4371_8778_507d8fcda31b"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1648_1f138241_c648_452c_8e22_fff6602e63b2"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1649_4b81af26_ff30_42bc_8cb8_754c29311a7e"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_FTSEEPRANareitGlobalIndexMember"
      id="t_26_661098a3_b20e_2b33_1305_92257eb31791">FTSE EPRA Nareit Global Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1670_c4e74dad_5bf9_f258_b25e_cedbdd8d5597"
      unitRef="pure">0.2906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1671_d3ef35f8_6201_965f_a151_984fb198b47c"
      unitRef="pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1672_f453d978_2383_9fae_aaca_a88ebbfdaeb9"
      unitRef="pure">0.0467</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_FTSEEPRANareitGlobalNetIndexMember"
      id="t_24_22698167_0c35_1605_20cf_4f41aa8574b0">FTSE EPRA Nareit Global Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1653_cb8c6bd9_eb58_4b32_a974_d592e1359fca"
      unitRef="pure">0.2780</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1654_7c60bed4_cb71_42c5_b454_a81e721a68d2"
      unitRef="pure">0.0084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1655_88630f31_73b5_452b_bc6e_73dea54294f3"
      unitRef="pure">0.0376</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077599Member"
      id="t_14_a0a34522_2528_0889_d028_cbf3efa3ab07">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_15_6f747dc9_e017_d9db_f5c5_da570752c016">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_19_4041c285_d98f_e2fc_c11f_eac035dbb149">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_16_fb14f4b2_fc6e_e831_c08c_1f8c63a1ada6">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077599Member"
      decimals="INF"
      id="h_1656_480d2ea0_10ca_41be_998d_c6fd768cdc7f"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077599Member"
      decimals="INF"
      id="h_1657_bef67e59_b261_4559_9c51_b206f50ce6e4"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077599Member"
      decimals="INF"
      id="h_1658_257f0587_c89a_4601_8f32_90397340bf18"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077599Member"
      decimals="4"
      id="h_1659_34154e40_8c22_454e_91e0_b7f35345b2d3"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_17_590dccc4_82ff_6657_491c_de12131e03d2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273312.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_18_dfb6e19e_e7ed_b604_49c7_8b4a009172f6">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_EquinixIncMember"
      decimals="4"
      id="h_1660_56e14957_c897_449b_87c8_9190bf1852b6"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1661_0beab6e0_59cd_4008_a88a_fd24cb028e23"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_PublicStorageMember"
      decimals="4"
      id="h_1662_3c1e40a0_6be9_4487_8a37_37b492492d03"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_WelltowerIncMember"
      decimals="4"
      id="h_1663_3d5ed2eb_41a2_444a_8e3a_f7735727b296"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_PrologisIncMember"
      decimals="4"
      id="h_1664_9750bf2f_92e8_4e81_86b2_eb602251160d"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_CommonStockMember"
      decimals="4"
      id="h_1665_b0a3c985_4836_4466_b547_2ad1f4058494"
      unitRef="pure">0.995</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1666_e1292820_bcde_40f3_aa01_c30b0dfb8a45"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1667_c89b0a1d_f2ba_4ccc_b977_0cecd548c3e4"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_RightsMember"
      decimals="4"
      id="h_1668_93e79ff6_c0bc_4cef_8a1a_d8da7b7b5ba6"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077599Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1669_859ac86b_8897_4397_90ee_42800caf7379"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_21_f06cbe90_2a38_74e8_9ce5_2f0258f69e85">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077599Member"
      id="t_22_f8e6ac02_6fcc_734b_b070_9be73f940415">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000198287Member"
      id="t_1_a7ecba76_4ef1_e322_334d_82970c9477a4">Janus Henderson Global Real Estate Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000198287Member"
      id="t_2_327a6268_9d31_7d93_70e4_19dd6622a1fa">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000198287Member"
      id="t_3_84ed5f56_88d2_da59_e33f_91ef372b9ab0">JERNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_5_958be43e_ad92_6429_ed26_a7979409d7eb">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000198287Member"
      id="t_4_4c74a300_5226_87c1_19ec_2bb21f69131a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_8_2166d077_8c53_7eb2_407f_6953eb7e1725">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000198287Member"
      id="t_7_edce9303_243a_13f9_29eb_e3277579c38b">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000198287Member"
      id="t_6_ded793cb_421e_1732_a17d_bd56f6150d1f">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_9_4880f545_8cba_e8cb_49f5_e9c6ee4735eb">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_10_56eff9e9_e260_25ee_690f_d1c3fb84852e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class N Shares/JERNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;70&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000198287Member"
      decimals="INF"
      id="h_1670_bf67d495_9949_4267_b44e_4fcc46bbb053"
      unitRef="USD">70</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000198287Member"
      decimals="4"
      id="h_1671_44defd18_fb1a_43b6_a336_87985996ee26"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_27_83a317d9_9edb_b27e_8a0d_f68e9e9a866c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class N Shares returned 26.30%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_12_fa627b66_d02a_14d3_373d_4e0f6f556129">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273341.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_13_85813e1b_97c1_b25c_86fc_fd0cf2d22977">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class N Shares/JERNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000198287Member"
      id="t_23_67d54449_6626_7e42_1e96_26dd13479b47">Janus Henderson Global Real Estate Fund (Class N Shares/JERNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000198287Member"
      decimals="4"
      id="h_1672_6e5760f7_1ef6_48f3_9656_eac947589260"
      unitRef="pure">0.2630</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000198287Member"
      decimals="4"
      id="h_1673_a234bc50_8715_40db_bfd0_ba71a429dd8f"
      unitRef="pure">0.0318</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000198287Member"
      decimals="4"
      id="h_1674_a5050ec8_391c_4dd1_b043_886948942b45"
      unitRef="pure">0.0596</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_25_efc28400_c057_793d_23af_3baac9d978b6">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1675_33beed88_9b1c_45b1_b1cb_af9a25437cad"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1676_b638ff4e_3f3a_45af_8125_b60889a5d65f"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1677_67061273_a7b2_45f0_bbc9_0d1a803b82b4"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_FTSEEPRANareitGlobalIndexMember"
      id="t_26_c52b02ce_44b0_92f5_0fdb_4e150c0af655">FTSE EPRA Nareit Global Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1699_bb9496ca_9cc5_099f_90df_8f862acdfe8a"
      unitRef="pure">0.2906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1700_389fbfc0_c3a9_bd7f_7775_ff0a004d90ed"
      unitRef="pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1701_956e7817_9f58_d516_9f05_ab154fb61883"
      unitRef="pure">0.0467</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_FTSEEPRANareitGlobalNetIndexMember"
      id="t_24_a83752b0_a20b_2604_2ef4_2f6d9b580f34">FTSE EPRA Nareit Global Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1681_8e9e0a2f_7ac6_488b_b66c_b04bbfe8697b"
      unitRef="pure">0.2780</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1682_2f0a4089_a2d1_4e4a_9430_8d062af0bd8d"
      unitRef="pure">0.0084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1683_a2b00206_5dc8_464b_bc51_8acf1269f0a9"
      unitRef="pure">0.0376</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000198287Member"
      id="t_14_f885b938_82eb_ea08_143a_e3de5ab7772e">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_15_4f07bf02_049a_11aa_2418_5988be2d67d0">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_16_81f2ccb1_39f0_0eeb_1c11_9dc9bd05b1a9">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_17_d2726bea_c9be_9589_878a_46b4b2242b43">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000198287Member"
      decimals="INF"
      id="h_1684_4c7ccc1c_6475_439e_a10d_02df8f1533be"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000198287Member"
      decimals="INF"
      id="h_1685_969903aa_803c_4f00_8008_06c1c3da82af"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000198287Member"
      decimals="INF"
      id="h_1686_3a41ec41_1d70_4861_a7cd_4e24fafc40ea"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000198287Member"
      decimals="4"
      id="h_1698_e0dab8e7_dd89_5056_517a_4e35adf82157"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_18_4a8a6172_5b33_3586_d8cd_e54a21fea919">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273351.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000198287Member"
      id="t_19_b8d51776_3198_9796_70fe_3ab78145b637">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000198287Member_EquinixIncMember"
      decimals="4"
      id="h_1688_338030b5_7be0_4871_958f_54eb28853c80"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198287Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1689_abc9e03f_abb9_402d_807a_b5ce1f583e84"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000198287Member_PublicStorageMember"
      decimals="4"
      id="h_1690_287faf79_c5a2_4d7f_ac85_9d59f71d0359"
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      decimals="4"
      id="h_1691_1f6d1970_17d8_4b39_91da_a1bc229722cc"
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      id="h_1693_26b52430_0c8f_4cec_930e_e9049b6d92ef"
      unitRef="pure">0.995</oef:PctOfNav>
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      contextRef="TI20240930_C000198287Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1694_b944e36d_c5c6_4dba_9591_9af21eed71ee"
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      id="h_1696_8e517191_f1fc_40c3_ae6b_411b1c31dc22"
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      contextRef="FY2024_C000198287Member"
      id="t_20_e1ae69be_7ed0_8ba0_ce39_b52bd82b234c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
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      contextRef="FY2024_C000198287Member"
      id="t_21_d9b44fc6_2e61_dcaf_adcd_31ee05168e55">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077600Member"
      id="t_1_7ca7ff20_4748_ce4d_7002_55d383ce4d94">Janus Henderson Global Real Estate Fund</oef:FundName>
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      contextRef="FY2024_C000077600Member"
      id="t_2_574899c8_aeaa_e385_0886_d883e2ca354c">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077600Member"
      id="t_3_1fc718dd_5dd1_a1b7_a56d_27274a93bc72">JERSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_5_ed05bfcb_1001_962f_fd2d_ed8234a8c0eb">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077600Member"
      id="t_4_cc13c5bf_45c1_8623_ebd5_34c39cbcad00">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_8_163e61d8_23d0_3289_64b9_5db75922818b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077600Member"
      id="t_7_7955f84d_6246_f168_1e04_cef1bde738ee">janushenderson.com/info</oef:AddlInfoWebsite>
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      id="t_6_1cea7dab_dc46_8323_d410_b165e5c0263f">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
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      id="t_10_4b4c4890_e185_99eb_cecb_48819c293204">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class S Shares/JERSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;131&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_1699_f7fbc804_16a4_45b9_a0b1_7f63521ec8d1"
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_27_524b3dad_2c1b_ee93_43cf_a44e179c7d36">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class S Shares returned 25.67%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273380.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_13_3319aa60_2e17_89ae_f2f0_dac3c81174c0">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class S Shares/JERSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      decimals="4"
      id="h_1711_7122635e_7871_4906_9a85_6f4fc1bd3768"
      unitRef="pure">0.0376</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077600Member"
      id="t_14_b966cc28_3e1c_a4a0_028c_179fe02199f9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_15_41a8b6df_57ce_6718_4f59_37464b9d6916">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_16_0a0ad7d5_ad14_d0de_bbe7_ea8bd8d829cb">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_17_a068193e_644c_420e_8c10_6fcc07927d78">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077600Member"
      decimals="INF"
      id="h_1712_19c48452_c5ad_489b_98e1_9e1bcefd4891"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077600Member"
      decimals="INF"
      id="h_1713_96d88f7d_e78f_4a1d_8e30_07e4fc310473"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077600Member"
      decimals="INF"
      id="h_1714_585b72b4_4ee0_4147_80d2_4148e79960ca"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077600Member"
      decimals="4"
      id="h_1715_c88a9ecc_2d3e_4752_84a1_609a940ec27c"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_18_af9567e5_b1de_f800_c842_f35e504b9fb0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273390.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_19_11c4573a_bf56_93f7_084b_0963bf894ea0">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_EquinixIncMember"
      decimals="4"
      id="h_1716_d7e0d4fa_1ae5_4970_87f3_7a7325c5e1a6"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1717_205cd203_6bfd_4c19_8808_ffac5c4a4aa8"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_PublicStorageMember"
      decimals="4"
      id="h_1718_ddd7cfd1_6359_4267_8ce3_36e4da718b39"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_WelltowerIncMember"
      decimals="4"
      id="h_1719_b2ed6037_e9b6_4ab0_8435_546a0a9e6836"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_PrologisIncMember"
      decimals="4"
      id="h_1720_3aa884f1_cf80_4684_bffc_d58306740ba9"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_CommonStockMember"
      decimals="4"
      id="h_1721_507217ae_2c13_40da_abe6_1794351e2fd7"
      unitRef="pure">0.995</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1722_247ee545_1d23_4f3e_8cb0_bcd555c9cc0f"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1723_b2ff7bf8_2aee_4b9f_b59a_cf4ce10adfe2"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_RightsMember"
      decimals="4"
      id="h_1724_553366ea_3819_40b0_ac97_847bed224d90"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077600Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1725_01679869_5424_4c3d_aefc_7234f5b49621"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_20_a1a5c5a7_73e5_21e7_a0a3_74a57871e8f5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077600Member"
      id="t_21_c804424b_60cb_ff80_6e22_d3de9269528a">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077601Member"
      id="t_1_1a09cb6f_ab3d_33ac_9f92_63574782725a">Janus Henderson Global Real Estate Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077601Member"
      id="t_2_84ab1a0f_07ae_7e4f_8487_27de6a88c08b">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077601Member"
      id="t_3_db14ce1a_1ddd_315f_c22e_c1c20ec2475f">JERTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_4_33c9b2a4_bb4a_e720_bb11_c3c2c5d87f11">This annual shareholder report contains important information about the Janus Henderson Global Real Estate Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077601Member"
      id="t_6_60b76ace_493e_9101_dc37_764067526813">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_5_418ec132_b3ad_79fb_de6a_73a059043521">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077601Member"
      id="t_7_90daf2aa_f66b_bc24_828e_840a993259a2">janushenderson.com/info</oef:AddlInfoWebsite>
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      contextRef="FY2024_C000077601Member"
      id="t_8_636591f8_1439_ab16_1b54_bb5be98ce16d">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077601Member"
      id="t_18_87bee383_4d4f_a1b2_c347_b192c96bb0db">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_9_7b6de76b_f789_0fbd_d61a_428db3db0bfd">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund&lt;br/&gt;(Class T Shares/JERTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;98&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">98</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_1727_3245d7b7_08e1_4081_8ea5_60f24a18943d"
      unitRef="pure">0.0087</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_28_4cc04158_3eb2_9f0a_15cd_9b42c355467c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Real Estate Fund Class T Shares returned 26.12%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its performance benchmark, the FTSE EPRA Nareit Global Index, returned 29.06%. Its additional benchmark, the FTSE EPRA Nareit Global Net Index, returned 27.80%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Australian logistics-focused company Goodman was the leading contributor relative to the performance benchmark. CBRE was another key contributor, due to posting strong results over the period and an improved outlook for office leasing and real estate transactions. A position in U.S. net lease owner Spirit Realty Capital also contributed relative to the performance&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;benchmark after the company&#x2019;s share price rose following the merger between Spirt and larger peer Realty Income early in the review period.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;China Resources was the leading detractor from returns relative to the performance benchmark. Cold storage owner/operator Americold Realty Trust also detracted after it was affected by negative sentiment around the potential demand implications from new weight-loss drugs. Mexican industrial property company Vesta contributed negatively. Its share price fell following the surprise results of the Mexican election in June, when the Morena party won a supermajority in both houses, heightening fears of undemocratic constitutional changes.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273419.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_11_b19ac507_6971_b8eb_5fa0_79c4f4e5948a">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Real Estate Fund (Class T Shares/JERTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;2.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;FTSE EPRA Nareit Global Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      id="h_1729_0e0cb69d_5ac9_4a2e_bf63_3920a8a62a87"
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    <oef:AvgAnnlRtrPct
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      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_23_cb3a6ed1_376f_f0fe_8bd7_b9ce55cd1643">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1731_803965f9_051b_4f33_bf12_ef7b982aae85"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1732_67f9eb71_13f3_4e17_88b1_93f5facfe416"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1733_07067f1c_2e45_4488_b5c9_65b8e5ad16a8"
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      contextRef="FY2024_FTSEEPRANareitGlobalIndexMember"
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1754_8413c32c_e003_85a9_69dc_3b2755091151"
      unitRef="pure">0.2906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1755_aa71e180_7b63_b856_9733_a71bed3ed14e"
      unitRef="pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalIndexMember"
      decimals="4"
      id="h_1756_7e026d27_76a9_321a_28e6_374429cf6a0e"
      unitRef="pure">0.0467</oef:AvgAnnlRtrPct>
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      id="t_20_cc62e81b_ced1_600d_e747_b553d86aa9e5">FTSE EPRA Nareit Global Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1737_08995644_5a50_4b27_92cb_841a1287cd81"
      unitRef="pure">0.2780</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1738_fb8c4364_8c18_4617_a548_c052d7f07466"
      unitRef="pure">0.0084</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_FTSEEPRANareitGlobalNetIndexMember"
      decimals="4"
      id="h_1739_f57a24d1_7827_4028_a423_a4dead5f9745"
      unitRef="pure">0.0376</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077601Member"
      id="t_21_cde9b71a_3658_296e_db6c_d14e6ace6915">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_16_74b97695_9bac_2f58_1685_e033691f934b">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_15_ea4b8615_3055_0d81_b21a_80146d6a2bbf">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
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      id="t_12_4530a875_9bc1_7409_7314_707532d3e8dc">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;425M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;64&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_1740_3f702be6_21b2_492e_b799_2ff07392631d"
      unitRef="USD">425000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_1741_f1e35ab7_b3e3_42ce_bc7a_4ccf00a74246"
      unitRef="Holding">64</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_1742_4c2ea5a4_b497_4448_a3d8_370df7746240"
      unitRef="USD">2200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077601Member"
      decimals="4"
      id="h_1743_222642ae_b8fe_449d_a4dd_db12e5f34584"
      unitRef="pure">0.87</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_13_953d8893_5195_5159_e5dc_e36fce663694">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Rights&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273429.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_22_d8354f1b_93b2_d647_6a09_4dc783d543f8">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Equinix Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Realty Income Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Public Storage&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Welltower Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Prologis Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_EquinixIncMember"
      decimals="4"
      id="h_1744_25c914f0_05f6_41a5_8c10_1fec626b2ce9"
      unitRef="pure">0.062</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_RealtyIncomeCorpMember"
      decimals="4"
      id="h_1745_3eca3cb5_d3ec_4e07_aa57_6a8cef8ac499"
      unitRef="pure">0.051</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_PublicStorageMember"
      decimals="4"
      id="h_1746_f0413a83_7961_4d91_bcc5_41e97a8b1f67"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_WelltowerIncMember"
      decimals="4"
      id="h_1747_676e32df_59a4_4104_b056_61dc7c308a78"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_PrologisIncMember"
      decimals="4"
      id="h_1748_f035cfb3_1c9e_42f9_bf67_09e355db0dc5"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_CommonStockMember"
      decimals="4"
      id="h_1749_b903caf9_5e02_4605_a4b2_dcae8cdc141c"
      unitRef="pure">0.995</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1750_f6702830_2dce_4018_bd26_6e29503874ab"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1751_ff248e01_7aab_454a_a7f9_adf54a3ac568"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_RightsMember"
      decimals="4"
      id="h_1752_6341a849_625d_4772_88c4_2d622b81ad41"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077601Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1753_91f74905_88b8_4c53_a540_3ce2c97fa49d"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_14_e67e4327_52aa_d077_cbf7_49462a3844ce">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077601Member"
      id="t_26_a45d9f9a_39fa_4b7d_2f66_3fb6751f05bd">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the FTSE EPRA/NAREIT Global Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077732Member"
      id="t_1_5f653dfc_b208_4927_3540_e1d11b96ad30">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077732Member"
      id="t_2_9fb0aa0c_8493_10e9_8fec_2fc257c53d99">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077732Member"
      id="t_3_b108d003_bf5c_55fe_5b68_165032ef4a8c">JDWAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_4_f8bf124d_d65e_d98e_b4f9_ef8104057bdd">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077732Member"
      id="t_6_9015d0c3_f6e5_797e_011b_acd6a41c2f39">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_5_2f693a71_f9f9_a55e_8d85_ef9bc938fbc8">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077732Member"
      id="t_7_efc84f36_95a9_5457_3824_338bc6f0862c">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077732Member"
      id="t_8_5ddca44e_b8b2_4b50_070e_a47e59428bf7">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_9_6266fb4b_d121_0b6b_242a_362891c5e613">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class A Shares/JDWAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;115&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077732Member"
      decimals="INF"
      id="h_1754_fb446aaf_130b_460b_b63f_b38c55df0bd2"
      unitRef="USD">115</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077732Member"
      decimals="4"
      id="h_1755_d79dde09_6f73_4143_843d_ec6d90533730"
      unitRef="pure">0.0097</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_23_5d25e423_9c70_4d4b_878b_b1b163832b4d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class A Shares returned 36.90%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276500.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class A Shares/JDWAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class A Shares/JDWAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;29.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1756_6b5edaa2_7d55_4b37_b30f_25e272d744e0"
      unitRef="pure">0.3690</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077732Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1757_271eb572_9401_458b_b122_5f31631da2ad"
      unitRef="pure">0.1379</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_1758_5ff1be0f_1919_47dc_bddd_9643397c0f47"
      unitRef="pure">0.1040</oef:AvgAnnlRtrPct>
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      id="t_20_341f9ebe_008a_f897_f0a5_7d0afe3aa674">Janus Henderson Global Research Fund (Class A Shares/JDWAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_1759_83062419_cc23_45c3_93e6_e2d50be4c6b1"
      unitRef="pure">0.2902</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1760_263170f3_e0bc_4dd5_a125_b5864405d457"
      unitRef="pure">0.1245</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1761_df457136_0e02_46b2_8c8d_73fde8c981f3"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_21_e6374fd7_ec94_1781_bfec_235ac0a41237">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1762_0863366d_eb5c_4f49_bbc8_2ee66306c1ef"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1763_0400a8cf_b85e_4ca4_8317_ae226729f1cc"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1764_ada85ea0_28c4_4a45_9eb9_fa7720b3bc96"
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      contextRef="FY2024_MSCIAllCountryWorldC000077732IndexSMMember"
      id="t_22_4021a0fc_3686_a1f5_a483_9f2fcd74219e">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldC000077732IndexSMMember"
      decimals="4"
      id="h_1765_9e8e3dbb_b860_4566_9f08_8a8fecf3b724"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldC000077732IndexSMMember"
      decimals="4"
      id="h_1766_fad4fc0b_4bc0_4428_adc6_b4134720e196"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldC000077732IndexSMMember"
      decimals="4"
      id="h_1767_e665ff7d_4c3d_4779_8e3c_977fac81c9f8"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
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      id="t_13_d835cc51_610f_541c_694b_da659d28b16f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_14_380320d4_a4f5_2be9_b529_05c53ed133ee">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_15_c36278bd_5700_5f36_716a_da21151cd5e3">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000077732Member"
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077732Member"
      decimals="INF"
      id="h_1768_3fca3203_935d_480a_95f1_2268f6a6a889"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077732Member"
      decimals="INF"
      id="h_1769_edc5560f_3f16_4849_b23b_014769dd25e2"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077732Member"
      decimals="INF"
      id="h_1770_206973dc_da12_4faf_a435_1d7706287a44"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077732Member"
      decimals="4"
      id="h_1771_40c82852_8cf5_459f_adf8_dce4ccfca345"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_17_5f3b905e_831c_172d_a87f_5e5e2351fac2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276510.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077732Member"
      id="t_18_f8728306_2269_0ff5_1d0e_5cd37cc4f648">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_NVIDIACorpMember"
      decimals="4"
      id="h_1772_cd5ea902_f082_4c8a_888e_a798cd41cf04"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1773_3ccad23a_c83f_4141_897f_cd6db28a9d0d"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_1774_ab93d148_dc4e_450c_828c_9fe9b99bd5b4"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_AppleIncMember"
      decimals="4"
      id="h_1775_21f04428_f9aa_4c81_a408_5d39f61aa347"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_AmazonComIncMember"
      decimals="4"
      id="h_1776_50b385ae_fc68_4845_8c89_42a10c227605"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_CommonStockMember"
      decimals="4"
      id="h_1777_9a0df8ff_3f7a_4907_9361_0ac99a901c5b"
      unitRef="pure">0.982</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_PreferredStockMember"
      decimals="4"
      id="h_1778_38c1a821_d0f1_4eab_98fd_a8d9c2ceeaec"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1779_248fb652_a5f7_4432_ba85_93eba0b46718"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1780_a9de91f6_5616_4e43_bda0_d546256c1916"
      unitRef="pure">0.005</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1781_dc2164f5_f735_4275_a3c1_a540875e21f2"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077732Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1782_f43bd279_fa3b_493a_b258_c4dab4392051"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077733Member"
      id="t_1_7648ae73_125c_da94_1fa8_e371a8f32e34">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077733Member"
      id="t_2_6e8bf43e_7731_bfcd_bd5a_24073697b239">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077733Member"
      id="t_3_1fb23da0_372e_7a85_2593_7ce6556945d3">JWWCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_24_a823e9bf_a75d_b7d7_3f97_823ad89fde40">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077733Member"
      id="t_6_2251c906_1586_7bec_5d03_835854f89b1d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_5_28dca673_f56c_1de7_95c1_25eacbdad1c6">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077733Member"
      id="t_7_28caae71_b2ce_1a37_716c_c2b242e9252c">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077733Member"
      id="t_8_7708e72a_267c_f2e4_8c07_eaf669e68ddb">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_9_894adb02_d5e6_2633_dc19_c2da7544e5df">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class C Shares/JWWCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;207&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077733Member"
      decimals="INF"
      id="h_1783_eeabab77_516f_4ebb_b4c9_fae719201888"
      unitRef="USD">207</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077733Member"
      decimals="4"
      id="h_1784_5236695d_655b_4e4e_b97d_30e9b05cca20"
      unitRef="pure">0.0176</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_25_3974d65b_c8ce_c05c_f44d_3fc0992cd5bf">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class C Shares returned 35.79%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_11_2634263a_6160_4ffe_b56e_e72d2f5a5ae9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276539.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_23_ba6dc7a4_8209_186f_175c_229adcb3b88e">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class C Shares/JWWCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class C Shares/JWWCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;34.79&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077733Member_WithoutSalesLoadMember"
      id="t_19_3308dec4_a58e_4af7_ccfd_c09a113ced55">Janus Henderson Global Research Fund (Class C Shares/JWWCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077733Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1785_3f0851ea_7aee_4868_8030_9049059b0cd9"
      unitRef="pure">0.3579</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077733Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1786_f369dbce_165e_4252_a414_3fdaface1445"
      unitRef="pure">0.1299</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077733Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1787_3b6117ae_4dd7_4225_bff1_262bddff19cc"
      unitRef="pure">0.0964</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077733Member"
      id="t_20_bb95297b_9aec_feeb_86d5_6c11a1480db2">Janus Henderson Global Research Fund (Class C Shares/JWWCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077733Member"
      decimals="4"
      id="h_1788_140aef13_8fd4_4a49_8769_a27264d03903"
      unitRef="pure">0.3479</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077733Member"
      decimals="4"
      id="h_1789_9e1adf73_3920_4fb2_8999_aac1fdf13b2f"
      unitRef="pure">0.1299</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077733Member"
      decimals="4"
      id="h_1790_00b8a065_3604_4e59_86ea_53a2d0b87cef"
      unitRef="pure">0.0964</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_21_9d1a1a18_b502_a005_26e2_16971719a391">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1791_5baaaafb_2b70_409e_af83_3423b5eb6a01"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1792_4b812960_bc3e_4a71_8daa_2c2c596fd726"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1793_666898fc_361a_4b0f_9f59_b0fb82c85c7d"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldC000077733IndexSMMember"
      id="t_22_defc1f7d_693e_7c3f_96fd_225c595e7325">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldC000077733IndexSMMember"
      decimals="4"
      id="h_1794_c0b56a5c_804d_48d6_a892_2f792032e2c3"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldC000077733IndexSMMember"
      decimals="4"
      id="h_1795_e55b8e01_0476_4d44_8af5_8a63d0da51fa"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldC000077733IndexSMMember"
      decimals="4"
      id="h_1796_1d4a6ad5_22e9_400c_a3b3_14c78535a7a3"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077733Member"
      id="t_13_dfeb2301_73f6_c8df_0869_2c77dd114f95">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_14_8dfae10f_e02b_f512_d5b1_900562047b4e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_15_adf80fe8_b834_a759_5819_a52afe23d8c7">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_16_4fe795fe_6abd_56e0_d839_752331becd55">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077733Member"
      decimals="INF"
      id="h_1797_e506c04f_95ba_4a0f_80b2_3b1f42e9a49b"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077733Member"
      decimals="INF"
      id="h_1798_5f5a9dd4_b89f_47f3_9b12_5a077f647e07"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077733Member"
      decimals="INF"
      id="h_1799_130ef11f_7dc5_43eb_8bae_69a0050b4f39"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077733Member"
      decimals="4"
      id="h_1800_325c8797_83f3_4489_988e_3294d203df6e"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_17_c2761c77_44a0_6f6c_3a0a_d3ba57c0c46b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276549.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077733Member"
      id="t_18_3e5bd066_02c7_b0cf_efd5_f1b142a41164">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:ClassName
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      id="t_2_10346ea8_c2bd_a730_27de_acfe7b468746">Class D Shares</oef:ClassName>
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      contextRef="FY2024_C000083534Member"
      id="t_4_bc29c763_6abc_95bc_041e_336a093f9ce7">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2024_C000083534Member"
      id="t_6_9dadbf63_bb32_175d_90b4_98399380cbca">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
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      id="t_7_a7b6ffb3_4154_b8aa_cbe2_0502c2d9dafa">janushenderson.com/reports</oef:AddlInfoWebsite>
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      contextRef="FY2024_C000083534Member"
      id="t_8_f393cf17_8f50_582f_a0c5_73d070a2f54a">1-800-525-3713</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class D Shares/JANWX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;89&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_1812_52022e73_defb_4a41_a909_a98c9196cd2f"
      unitRef="USD">89</oef:ExpensesPaidAmt>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class D Shares returned 37.18%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276578.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      id="t_12_eaf42610_f34c_5941_6417_174b32b931d8">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class D Shares/JANWX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;37.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083534Member"
      id="t_17_4a0edf9b_935e_85c2_0c5a_997bd24b8ad6">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000083534Member"
      id="t_18_843675df_9c3c_1f9f_e3a1_00a9c906b75a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083534Member"
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083534Member"
      decimals="INF"
      id="h_1823_b67311a1_ea7d_4fbf_ab7b_6c5b4154c534"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083534Member"
      decimals="INF"
      id="h_1824_79a4c95d_d6de_4da7_ba9f_b9e479fd7433"
      unitRef="Holding">115</oef:HoldingsCount>
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      contextRef="FY2024_C000083534Member"
      decimals="INF"
      id="h_1825_8eae8726_667f_42d1_aefc_444a0b504e1b"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083534Member"
      decimals="4"
      id="h_1826_b4e7bab0_8314_4186_8df0_bb00d6ce170a"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276588.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083534Member"
      id="t_21_44023402_6548_bb9e_2920_95b6d97334a3">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      id="h_1829_12262f99_5900_4e1c_ad21_c67e63a7197b"
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    <oef:PctOfNav
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      decimals="4"
      id="h_1830_22cb947c_a95d_4a98_8450_1e81ce13850d"
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    <oef:PctOfNav
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      id="h_1831_91c2675f_0f87_4cda_abfa_c62c8650bf46"
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    <oef:PctOfNav
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      decimals="4"
      id="h_1832_fbb2cfee_a944_4ca7_928a_cfc8a5ffb3d5"
      unitRef="pure">0.982</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083534Member_PreferredStockMember"
      decimals="4"
      id="h_1833_3e9c6f75_3878_4f7e_bc92_382f8275a110"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083534Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1834_3d9cec27_6513_4a46_8b19_66b8e5d9d284"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083534Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1835_19809b08_2b92_49c6_9b8c_d6d4058abe15"
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    <oef:PctOfNav
      contextRef="TI20240930_C000083534Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1836_c47a5269_c338_4946_baf2_8d32ad21e47c"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083534Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1837_cdbd606f_c4ed_4fe7_83dc_13d6a56d6222"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077734Member"
      id="t_1_27dafdfe_0c4e_4546_89cd_a353e2ebe61c">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_14d11acf_44fe_34e8_dc00_ea54a6056662">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
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    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_4_b5f0c186_e7c1_12e5_3a9b_c718a93c7ba8">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077734Member"
      id="t_5_a6ffcb50_d709_ac63_8608_52455169aad3">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_6_ca2de86e_2160_2311_1ec4_68e2a994f0bf">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077734Member"
      id="t_7_b1a59597_f757_c4ce_be3b_7e6f66272e54">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077734Member"
      id="t_8_096a858c_a0bc_4269_fe53_8be1bc21a94b">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077734Member"
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&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
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      contextRef="FY2024_C000077734Member"
      id="t_10_769fb3e1_34bf_4289_2606_166cab1fe6f9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class I Shares/JWWFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_1838_eb7f016b_fbdc_49df_aa45_59ca30413a42"
      unitRef="USD">83</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077734Member"
      decimals="4"
      id="h_1839_49776794_7a3c_424f_bde2_93e2f98a4004"
      unitRef="pure">0.0070</oef:ExpenseRatioPct>
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      contextRef="FY2024_C000077734Member"
      id="t_26_e9b52b4c_17a5_63d1_f9e4_5d5f25d0123f">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class I Shares returned 37.25%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276617.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class I Shares/JWWFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;37.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077734Member"
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    <oef:AvgAnnlRtrPct
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      id="h_1840_2218d6f2_c910_4a51_8846_7c28cd5b9a46"
      unitRef="pure">0.3725</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1841_b84fb7e2_8c10_4574_a7d7_f6b3333bd889"
      unitRef="pure">0.1418</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077734Member"
      decimals="4"
      id="h_1842_836f0661_e975_4e09_8b56_51a4df2ee2ed"
      unitRef="pure">0.1079</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_15_28095794_ebb3_6fcd_d2e1_76f7b7dc99b3">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1843_dc334240_f41a_4157_b6ee_51d23d3de262"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1844_3dee72ed_6312_4cca_981f_de7b315ffc4f"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1845_fbe4d60e_ac11_4f22_af79_7ef9349f53df"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldC000077734IndexSMMember"
      id="t_16_9c389e3a_a88a_1184_7179_68699f7527c0">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldC000077734IndexSMMember"
      decimals="4"
      id="h_1846_9bdf4de4_9d82_4b61_aff8_4d21c354b6ce"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldC000077734IndexSMMember"
      decimals="4"
      id="h_1847_f7482a77_0084_4d08_8fe2_536d6d1b533b"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldC000077734IndexSMMember"
      decimals="4"
      id="h_1848_02ae3c04_bdf0_4cfc_a66c_389cf848b7c9"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
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      id="t_17_f70948e3_6245_b57c_1d33_9ad78f8989dd">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_18_f0cf565b_14c0_ec8a_e95f_5de6e6b231ae">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_19_6ad3044d_4bd9_8089_fdad_12aa79e0cd96">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_20_95c255e0_9b82_79d8_b760_35e73e39b7d1">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077734Member"
      decimals="INF"
      id="h_1849_09fc50e6_7665_4668_842e_887a1cbf838f"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077734Member"
      decimals="INF"
      id="h_1850_5d09b169_7bcb_471d_8382_388e012bb79e"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077734Member"
      decimals="INF"
      id="h_1851_07465beb_7067_4733_a084_b9cd50557f2e"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077734Member"
      decimals="4"
      id="h_1852_357b33c7_8487_4bca_b0ad_9062a4b141ba"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_21_a47ec3d3_2802_fb2e_ebeb_ef5fcfdf547f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276627.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_22_7412c4db_5998_50e7_2d95_25869b94df5a">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_NVIDIACorpMember"
      decimals="4"
      id="h_1853_cf76af04_c1f5_40e7_b8d2_a219bf56c647"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1854_24735499_69d5_4ebf_8105_39d0afd2a36e"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_1855_5a9fc387_a109_4a36_8f86_bef89af03e5a"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_AppleIncMember"
      decimals="4"
      id="h_1856_26fc06b9_118a_4d09_af14_1e7b4d65a1af"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_AmazonComIncMember"
      decimals="4"
      id="h_1857_f18e105d_6374_4338_a23b_7c3dcfe8c0b9"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_CommonStockMember"
      decimals="4"
      id="h_1858_5d05f5bf_c654_4871_9bdc_e375349c5c60"
      unitRef="pure">0.982</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_PreferredStockMember"
      decimals="4"
      id="h_1859_78eab280_461c_4bfe_b932_b747452ca534"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1860_9bd03873_f17b_4dd7_a280_6aada69f39d1"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1861_75f32382_059f_475f_944d_c5a0670c1efa"
      unitRef="pure">0.005</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1862_c57641ca_a3c4_470f_afb6_a1f18a4c6c7c"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077734Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1863_82a68ae6_6e77_4062_8519_e4363468a688"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_23_ca59a8ef_4c69_d4bd_f548_30c02dd4936a">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077734Member"
      id="t_25_c5b1f757_7f45_3a45_ab8f_421db665809a">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000114882Member"
      id="t_1_38b07b34_983f_0eb3_387c_f475e55db214">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114882Member"
      id="t_2_8a66b1af_ee8a_80ba_8efd_6dedd963227b">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114882Member"
      id="t_3_3f82230f_bf6c_eed5_0949_c8136a21e4f1">JDWNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_4_9cd487e9_1543_c6f6_81ca_e64801e819d6">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114882Member"
      id="t_5_525a4425_4a7f_bc4c_d24a_108ef5eb37fe">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_6_3440e2ae_47f9_460b_446b_4888022a97f0">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114882Member"
      id="t_7_7ce82735_9693_c677_480d_c57c41e47f2d">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114882Member"
      id="t_8_1cf265a9_3e90_7775_91dd_6fa48bce74bd">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_9_c362b67e_fd23_e035_ba3b_7335f472948b">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_10_086699d6_13d6_e243_98b9_ae9b2c1284c1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class N Shares/JDWNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;74&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114882Member"
      decimals="INF"
      id="h_1864_66a19ac1_daef_4cf8_a120_987a89164d13"
      unitRef="USD">74</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114882Member"
      decimals="4"
      id="h_1865_67be49a8_28d1_40f2_98b7_afd915890e51"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_26_21e94aff_9cf4_4cc2_24ca_7d112a76bad8">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class N Shares returned 37.36%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_12_6ffe5710_ab1e_2efa_7c4b_db71f48a4a9f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276656.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_13_bdd961a6_6136_ff61_b2a6_665a7ecd01c5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class N Shares/JDWNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;37.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000114882Member"
      id="t_14_d4919993_8c25_3d14_4763_5100d5ba6c32">Janus Henderson Global Research Fund (Class N Shares/JDWNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000114882Member"
      decimals="4"
      id="h_1866_31c0f092_3ec5_480d_a78d_504710ef3159"
      unitRef="pure">0.3736</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000114882Member"
      decimals="4"
      id="h_1867_7f442ebe_b0d3_43cf_99ea_a832520a78a6"
      unitRef="pure">0.1425</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000114882Member"
      decimals="4"
      id="h_1868_ffd802b1_de5a_4ffd_97e9_33ae7f0f6fc8"
      unitRef="pure">0.1078</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_15_1536d8ea_946c_79c7_7734_185d318c733b">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1869_7ff11fb9_ba87_434c_b5aa_5b05a80f39c2"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1870_16dbddeb_5191_4fab_acb9_e4b35adb0b2e"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1871_1511ccf6_ae7f_480b_88de_0051eedc599f"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldC000114882IndexSMMember"
      id="t_16_a958759d_c49e_5697_33c6_c93376530685">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldC000114882IndexSMMember"
      decimals="4"
      id="h_1872_0fba39d8_2814_4129_a11b_6d9e86bf2a6e"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldC000114882IndexSMMember"
      decimals="4"
      id="h_1873_f1abc0c4_010e_4f74_9773_ffa4bf53c8cc"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldC000114882IndexSMMember"
      decimals="4"
      id="h_1874_b1f192fc_85f8_4281_aeab_b61cef1328b3"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114882Member"
      id="t_17_c62d4aec_9d9d_05e8_d286_f437641bc7de">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_18_0d365aae_1bd9_15f4_c7a4_4187ba781a3d">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_19_6c93a759_5c53_c9f2_8068_e2a2bc80c231">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_20_1d840b4a_7a9a_7820_c41b_9e267adef619">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114882Member"
      decimals="INF"
      id="h_1875_29c52eb7_3275_4c6c_8740_3735dc571eb2"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114882Member"
      decimals="INF"
      id="h_1876_b2746984_1022_4a21_a98a_5bf178ab12e5"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114882Member"
      decimals="INF"
      id="h_1877_edb15ac4_f314_4b2a_b8d9_725a7a49ddc2"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114882Member"
      decimals="4"
      id="h_1878_b61035f7_b6d3_4ac1_b153_11a6d6c229ff"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_21_e74481a6_dda3_bf2f_bea7_100cfd9bc0da">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276666.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114882Member"
      id="t_22_53ad1511_821e_b673_1ecc_184ff3db2bea">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      contextRef="FY2024_C000114882Member"
      id="t_23_82575f57_6d85_6635_8280_77739f09745c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;.&lt;/div&gt;

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&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;.&lt;/div&gt;
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      id="t_1_467b0800_4b27_7440_8f5c_3d9aaadbab6a">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
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      id="t_16_f563d792_59fb_ef26_d5f6_9ce61e3a12ac">Class R Shares</oef:ClassName>
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      contextRef="FY2024_C000077735Member"
      id="t_17_7b7f8390_8cda_322b_3b8b_f426283c99e2">JDWRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_3_07d205f4_6e6e_a4ea_413e_4f1b7520cc06">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077735Member"
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      contextRef="FY2024_C000077735Member"
      id="t_4_841636f3_b8e5_152d_e21c_dbe065e8816c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
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      id="t_6_73e97cd9_d8b1_a21c_f7df_310e0984f382">janushenderson.com/info</oef:AddlInfoWebsite>
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      id="t_5_8db07147_bb2f_5a2a_4638_48d7d73c1bb3">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class R Shares/JDWRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;165&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_1890_40bdc60e_dffc_4f4b_9ec7_0007b6e92fb0"
      unitRef="USD">165</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_1891_1c32fa92_558d_4ebe_a0d4_66de1ace32c8"
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class R Shares returned 36.28%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276695.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_10_82e36664_1e75_03bf_dbdb_5a09444c981a">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class R Shares/JDWRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_1893_a31471c7_80be_4d95_9aa1_e8c70b000f6e"
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1899_731f0ced_2194_444e_9455_39027ffa356e"
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    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077735Member"
      id="t_11_cb848f8e_e9db_dbe2_43af_cb834c8763d8">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_12_5ce6bbfa_ef78_666f_34ae_6832c2290abf">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_13_d3b381ca_a1a2_9297_6da7_c103e549e585">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_14_eb4aa3ae_58e8_f83f_0267_000620f54640">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077735Member"
      decimals="INF"
      id="h_1901_64a25ef5_96c1_4c4b_a205_55ae12d1cd53"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077735Member"
      decimals="INF"
      id="h_1902_8e328ac0_d2e6_4378_bd0b_13f7f0d27c2e"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077735Member"
      decimals="INF"
      id="h_1903_aac34953_7616_415c_9688_c6d2c5cb303d"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077735Member"
      decimals="4"
      id="h_1904_070274a6_3c1b_4cb6_a0aa_19b516ff70b5"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_15_0ec11e73_f385_e114_82d6_dfc5842abc66">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276705.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077735Member"
      id="t_18_5be18bc9_83a3_469d_b11f_b25f7be889aa">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_1905_13795634_544b_4ff3_ae97_b4f23a4a1879"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1906_ce05905a_a46c_4ae0_bd26_59bfd55961a3"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_AlphabetIncClassCMember"
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      id="h_1907_fc85ee71_1495_4d78_a56b_77de104dad82"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_AppleIncMember"
      decimals="4"
      id="h_1908_84feb64a_3d16_4a49_b76e_7ad1bd19e39c"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_AmazonComIncMember"
      decimals="4"
      id="h_1909_e5cf1392_dcbb_4d0d_9c58_8224adb30a43"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_CommonStockMember"
      decimals="4"
      id="h_1910_adc6bc69_9c8f_4bc0_ba84_3d108f68fab9"
      unitRef="pure">0.982</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_PreferredStockMember"
      decimals="4"
      id="h_1911_f053377b_0de2_463c_b502_0f9aad432ef6"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1912_1ddb2ec9_164f_46c7_a2ee_6c898e3723bd"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1913_b1d030dd_04b3_4b1b_b13f_c61650c69a5b"
      unitRef="pure">0.005</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1914_65bc42da_e236_465a_9675_f8673496f802"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077735Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1915_dd4d1d61_4a9d_4ec1_af60_836671e205ff"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077736Member"
      id="t_1_a3cbe97f_ff01_e888_46bb_f9da081b828e">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
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      id="t_16_166b3937_7234_cc0e_5f07_faa9449c438b">Class S Shares</oef:ClassName>
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    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_3_1288fc99_0399_feaa_1578_464bcb0c8dec">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077736Member"
      id="t_2_35d862a2_3ac1_ffce_8ac2_24f319d987c2">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_4_ac6d57d8_a471_d290_d794_4b934a044d03">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077736Member"
      id="t_6_187a080e_44f8_b510_2794_8701cc052836">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077736Member"
      id="t_5_772ca06d_69be_4223_96f0_a3d97ce45985">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077736Member"
      id="t_7_e048fc54_a93a_5d2f_b78d_0ebec6112330">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class S Shares/JWGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;134&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      contextRef="FY2024_C000077736Member"
      decimals="INF"
      id="h_1916_ffbad5b5_4f24_4279_8a39_3e3941999888"
      unitRef="USD">134</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077736Member"
      decimals="4"
      id="h_1917_577ba5bd_c67e_441a_b592_f1972b4e7c30"
      unitRef="pure">0.0113</oef:ExpenseRatioPct>
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      contextRef="FY2024_C000077736Member"
      id="t_22_56c49da5_3052_e532_fa05_90b59404f1da">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class S Shares returned 36.65%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276734.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_10_3f37e014_f25a_ffdd_c2b3_4e0e6ce30ea5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class S Shares/JWGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077736Member"
      id="t_18_c538b3ae_3b95_5766_2078_02d50b3ae0e8">Janus Henderson Global Research Fund (Class S Shares/JWGRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_1918_d0a5b6f5_2e7a_46b5_9565_901a8ceaa3f0"
      unitRef="pure">0.3665</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077736Member"
      decimals="4"
      id="h_1919_87dcbf39_bde6_4222_b876_eabc24be343d"
      unitRef="pure">0.1368</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077736Member"
      decimals="4"
      id="h_1920_fca28a92_0120_4b35_9c56_4f26b97a15d0"
      unitRef="pure">0.1031</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_19_db9b612d_8946_17b6_760a_1a76a51eb251">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1921_d5ca0088_9f45_42ba_ac3c_e68975e1f95a"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1922_a6018ef3_6f08_47dc_9c1e_74af0db38d11"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1923_57aceccd_86bd_482d_87d7_4f275cd0cf52"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldC000077736IndexSMMember"
      id="t_20_ebf3ecc8_78ab_de41_5f23_14a96545cc99">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldC000077736IndexSMMember"
      decimals="4"
      id="h_1924_f02f66ff_35ac_41a1_bb87_c4d27c31b8d0"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldC000077736IndexSMMember"
      decimals="4"
      id="h_1925_ae64a5be_3cbe_4b1b_8395_4e75870335db"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldC000077736IndexSMMember"
      decimals="4"
      id="h_1926_92f6a718_870c_42da_ba7e_a90058239dee"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077736Member"
      id="t_11_c854259a_cf22_5720_6ce5_1515236f5792">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_12_1646d330_53d0_b7cb_2eb2_cd03aa74c533">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_13_46d907c8_545e_a6a8_95ad_fce7787224d4">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_14_24a05204_c7eb_be3e_3a5e_e4dc666d040d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077736Member"
      decimals="INF"
      id="h_1927_21f19d35_5c46_47e8_8d2d_8de2c1646b74"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077736Member"
      decimals="INF"
      id="h_1928_2fd49d38_8025_4e8e_b63e_b31682e8f6f4"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077736Member"
      decimals="INF"
      id="h_1929_6491b97c_4db6_4e64_8142_ddc876d60cd5"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077736Member"
      decimals="4"
      id="h_1930_8ba91cff_9d3f_4475_8127_9169cabe92d5"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_15_2ee281ec_ad3f_30b8_c2bd_0b9fa151cbc5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276744.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077736Member"
      id="t_21_4278f259_b661_49b8_2b76_b94a0ae1c921">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_NVIDIACorpMember"
      decimals="4"
      id="h_1931_3078e23c_87e3_463a_9511_9e31c540981e"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1932_d165ee94_ec49_474e_b9d2_ef91b0b40cc7"
      unitRef="pure">0.054</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_AlphabetIncClassCMember"
      decimals="4"
      id="h_1933_a2483f70_528d_4d86_9fc9_62438cd10c49"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_AppleIncMember"
      decimals="4"
      id="h_1934_b426ae5a_a8db_463c_b61c_53290a70d0b7"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_AmazonComIncMember"
      decimals="4"
      id="h_1935_78aa5e2b_20bd_4ed6_b83a_70641fb5fbad"
      unitRef="pure">0.029</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_CommonStockMember"
      decimals="4"
      id="h_1936_7e09bcf9_4234_4996_bedb_c6d7c6dae3d2"
      unitRef="pure">0.982</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_PreferredStockMember"
      decimals="4"
      id="h_1937_e59260fb_97f5_4cb2_bbda_3388b38cec4b"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1938_1d2dfc2b_b399_479c_b088_60597f6e3593"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_1939_a2acef4f_c818_4f82_bd36_0fe0912d6dcb"
      unitRef="pure">0.005</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1940_438736a5_0a6b_4b94_8a66_763ab5453e54"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077736Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1941_f95f3931_229d_4f48_9cbd_7a43050ad432"
      unitRef="pure">-0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028951Member"
      id="t_1_58ede39e_c749_b22e_ab38_c6418bb60d4e">Janus Henderson Global Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028951Member"
      id="t_2_dd0a541e_15e7_19dc_f524_71fa855e5cde">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028951Member"
      id="t_3_44302765_251d_255a_7e9d_2df717a3de4a">JAWWX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_5_b9217721_149e_ed4e_b203_65deddcc6307">This annual shareholder report contains important information about the Janus Henderson Global Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028951Member"
      id="t_4_5a454b91_40e9_b386_8d3c_0afef37d5aae">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_6_d3498b9f_6506_b0f2_4834_42147941c764">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028951Member"
      id="t_8_e18cf33d_81bb_adeb_7052_49e9af2aeb21">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028951Member"
      id="t_7_7c010f8e_d182_6671_482d_136770a89399">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_9_637a527b_ab7d_e54b_edc2_01ed43072257">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund&lt;br/&gt;(Class T Shares/JAWWX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;102&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028951Member"
      decimals="INF"
      id="h_1942_79707602_48e2_4a46_b60a_ee7f4d64ef1c"
      unitRef="USD">102</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028951Member"
      decimals="4"
      id="h_1943_40b85497_7147_48ef_afd2_f6b57bc5651f"
      unitRef="pure">0.0086</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_22_74ce1281_68c3_9a9d_f700_4aa8cb43a7ae">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Research Fund Class T Shares returned 37.04%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%. Its additional benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed relative to the broad-based benchmark. The U.S. independent power producer delivered strong profits growth and guidance supported by increased energy usage to power artificial intelligence (AI). NVIDIA, another contributor, reported robust earnings supported by strong demand for its data center graphics processor units used in generative AI.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Weaker consumer spending trends in China pressured revenue growth and share price performance for Germany-based multinational automaker Porsche and France-based global spirits company Pernod Ricard. Both stocks were notable detractors from returns compared to the broad-based benchmark.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_11_b29e96ae_d4ae_d1b7_750d_504c5a1328c0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276773.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_12_bd72447d_7e84_dc4b_f1e2_671d6850f885">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Research Fund (Class T Shares/JAWWX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;37.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028951Member"
      id="t_18_a793ba0c_1f37_e6e5_d6c0_4a89b38536eb">Janus Henderson Global Research Fund (Class T Shares/JAWWX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028951Member"
      decimals="4"
      id="h_1944_ed229953_7238_4045_8ff7_2adb9608fbb2"
      unitRef="pure">0.3704</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028951Member"
      decimals="4"
      id="h_1945_7d97eabb_4540_41f1_9113_196b7400d501"
      unitRef="pure">0.1399</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028951Member"
      decimals="4"
      id="h_1946_f39f9976_1110_4dd2_a5c7_43867a843da1"
      unitRef="pure">0.1060</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_19_537668df_e299_5dfa_858a_876547e3530c">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1947_d30ccd3b_6929_429c_b131_8f5147286f23"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1948_f49b86c7_4f38_4ec6_b622_9168c784115b"
      unitRef="pure">0.1304</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_1949_81bb7c91_d6da_4587_84af_27df6498a7a9"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldC000028951IndexSMMember"
      id="t_20_e62ab8e1_6e5a_c462_4fea_12ed08a5dcf5">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldC000028951IndexSMMember"
      decimals="4"
      id="h_1950_988eea56_c6e9_4bdd_bcc0_e9ff6638eb50"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldC000028951IndexSMMember"
      decimals="4"
      id="h_1951_94ce1d63_7cec_459a_8c5e_51aa88496505"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldC000028951IndexSMMember"
      decimals="4"
      id="h_1952_2c1fe86c_8d16_4446_9ad4_a8ba8fcd0781"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028951Member"
      id="t_13_43f0d92d_a102_2385_abbc_eeb685d27cd4">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_14_f3c44b81_8a48_139d_bf47_4872118263bf">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_17_aab0be98_fab6_29cc_a1a4_7143b536c344">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_15_66d27e39_e187_d7cd_1201_6b37d5b86000">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,870M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;115&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20.4M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028951Member"
      decimals="INF"
      id="h_1953_d42830a3_cdd4_4de0_91c4_b499de5acdd7"
      unitRef="USD">3870000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028951Member"
      decimals="INF"
      id="h_1954_0f7f3758_0862_41da_9e10_8419c3217d41"
      unitRef="Holding">115</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028951Member"
      decimals="INF"
      id="h_1955_d6d0882a_4823_4061_91fe_43f54172674a"
      unitRef="USD">20400000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028951Member"
      decimals="4"
      id="h_1956_c184a3ab_1c7c_4af8_b967_99d0f86cb91f"
      unitRef="pure">0.28</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_16_0a588515_a6ad_79a6_96df_8dd24f71fd55">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(0.3&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276783.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028951Member"
      id="t_21_c63e1f59_63bc_b1fe_8d6d_de55c245c3ec">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Alphabet Inc - Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.9&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
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    <oef:FundName
      contextRef="FY2024_C000077678Member"
      id="t_1_3580cdcf_3d06_78ad_b4d4_672d2c88f24d">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077678Member"
      id="t_2_5c4b3e36_3255_927c_61dd_3af737dd4f72">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
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      id="t_3_5c189fd3_64b3_4199_b314_86d52955f676">JORAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_5_4179ac99_cc70_4884_7c01_88ced1482d73">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
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      id="t_4_60fb0cd3_ca10_cc72_d86d_c4dfe63c9584">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_6_4cf3828a_248e_2409_6422_351a0fa191a1">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
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      id="t_7_c9a2a4c2_4011_afda_c472_fdc1298b03fc">janushenderson.com/info</oef:AddlInfoWebsite>
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      id="t_8_613c6e09_b5f1_c83a_bff4_7cc7c3e973c6">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class A Shares/JORAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;119&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_1968_c91d4d8b_e61e_4aa1_a1b2_6b8821a64ce8"
      unitRef="USD">119</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_1969_bc8c5a8a_dd13_4090_81af_35475af57f2a"
      unitRef="pure">0.0102</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_22_a11a0e8c_55de_cf87_6a60_3541cec1cd5d">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class A Shares returned 32.99%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277670.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_10_897bb1a0_aad2_fed6_07a8_adcd5909c735">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class A Shares/JORAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class A Shares/JORAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077678Member_WithoutSalesLoadMember"
      id="t_13_bd8fc2e5_24a9_b1fb_05d1_6fcdbdb182b5">Janus Henderson Global Select Fund (Class A Shares/JORAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_1970_151955e1_772f_4913_b83c_c8c6e6c43dcb"
      unitRef="pure">0.3299</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1971_3e6a24fa_7192_4657_be91_729dfe0daf25"
      unitRef="pure">0.1337</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077678Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1972_fbf6413c_51ce_4e46_8445_bb69ea0a4698"
      unitRef="pure">0.0981</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
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      id="t_14_32acdf15_a6e3_3ac0_87a3_86dc180a406d">Janus Henderson Global Select Fund (Class A Shares/JORAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2537</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      id="h_1975_785e6cec_e916_47ae_bca2_61c9474c4e44"
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      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1976_63a2df3e_37e1_448d_a974_e3ed32d5109d"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_1977_03e90728_86f2_4a53_bfbd_292999f38503"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_1978_1314dc80_8765_48ab_b915_219249d96918"
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    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077678Member"
      id="t_16_73e1c153_eb12_1a9c_924f_4c64dcd57af9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_17_f12e8fd5_0f9d_5a60_0422_8ab12c1276a5">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_18_9112e6df_b232_4c28_1668_24b8911a162c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_19_a302dc9a_a880_121f_93e8_9414c93de316">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077678Member"
      decimals="INF"
      id="h_1979_7819b00f_4b74_48f1_a1a3_b88abdcf567b"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077678Member"
      decimals="INF"
      id="h_1980_fc54646f_a975_488c_90b9_f0d639c1ba3d"
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      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077678Member"
      decimals="4"
      id="h_1982_6a231709_83fe_4e50_9476_2ea724c03291"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="FY2024_C000077678Member"
      id="t_20_eaba6461_bdb3_61c3_a1a1_a63dd914b205">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277680.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077678Member"
      id="t_21_6f55f5e7_3911_835d_0bdb_b691b9b9fce7">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_1983_eb269b9a_fcae_4142_a2ee_7fe60a155635"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_MicrosoftCorpMember"
      decimals="4"
      id="h_1984_5e617e7a_efd8_4337_818d_9f7cb265f44d"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_VistraCorpMember"
      decimals="4"
      id="h_1985_0bfc8f65_e066_4d8f_85fe_271b267de3a9"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_1986_93f8e200_2b46_4cec_9615_4cb2bd7fe9db"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_1987_ff8332be_b4ba_419d_be2f_1f80c2fd2055"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_CommonStockMember"
      decimals="4"
      id="h_1988_c0a90198_da9d_4abb_808e_73e3910f92c1"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_1989_e1f3f6e2_374a_4d46_9558_9c4a4085e4e2"
      unitRef="pure">0.020</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_PreferredStockMember"
      decimals="4"
      id="h_1990_bcffde47_c4bb_4cda_a241_ebc3977e6824"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_PrivatePlacementsMember"
      decimals="4"
      id="h_1991_1efa9689_ef5e_4211_b489_0294a7cf5a4a"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077678Member_OtherInvestmentsMember"
      decimals="4"
      id="h_1992_1524c0c1_1ccd_41c9_bbea_c0ee24b177a1"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077679Member"
      id="t_1_12c7b49c_9ee3_be87_1002_f9017ac8ce43">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077679Member"
      id="t_2_1f9d27dd_528e_024e_f184_13a4702ad335">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077679Member"
      id="t_3_0e70f734_f33d_4034_2d89_18b27946b131">JORCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_5_55c05e04_6cc0_c1b9_99b3_416030c30c97">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077679Member"
      id="t_4_b479cf99_a7a0_542c_efba_be6dd32905d6">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_6_7543ce09_a795_7a1c_2335_b56e95e12475">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077679Member"
      id="t_7_7278dba1_e682_9156_6ec6_f97b3825296b">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077679Member"
      id="t_8_b6707cc7_afc7_0a5a_ee83_9216bce5d788">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_9_d4a16905_eca3_0a09_aad3_956526d98211">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class C Shares/JORCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;202&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077679Member"
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      id="h_1993_4c68688d_019d_4554_96ad_2dcbd8a4d4c1"
      unitRef="USD">202</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077679Member"
      decimals="4"
      id="h_1994_2b6e8ec4_6674_42bf_ba53_61e5ba19c3b4"
      unitRef="pure">0.0174</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_22_07e6f308_2d4a_f8a8_fbc4_8a53ce591d79">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class C Shares returned 31.98%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277709.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_12_25bc6bd2_c3e5_13f2_8f1a_847fd8e536c5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class C Shares/JORCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class C Shares/JORCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;30.98&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="t_13_e0c156e3_bd4d_e13a_2f29_d7ae2a7506d2">Janus Henderson Global Select Fund (Class C Shares/JORCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_1995_fe38e67e_e72e_4c6f_96fc_a087e05baa7b"
      unitRef="pure">0.3198</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077679Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1996_e0437283_432f_4f05_8820_182c94252c40"
      unitRef="pure">0.1241</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077679Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_1997_930fd7c4_c2c9_4b6c_9d8b_87b109b101db"
      unitRef="pure">0.0891</oef:AvgAnnlRtrPct>
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      id="t_14_3ed76d61_49bd_c511_3b61_9d7a3595bf6e">Janus Henderson Global Select Fund (Class C Shares/JORCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_1998_acb95ea9_6d83_4371_a063_22992ce86736"
      unitRef="pure">0.3098</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077679Member"
      decimals="4"
      id="h_1999_f428560a_4295_4690_a286_46d7715a4e74"
      unitRef="pure">0.1241</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077679Member"
      decimals="4"
      id="h_2000_03920f4a_545f_4db9_91cd_b953357e5dc4"
      unitRef="pure">0.0891</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_15_04571813_2c9f_a683_02a0_3fd5526ec36d">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2001_151c350f_9398_45a4_a96f_2b4932ff5107"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2002_dfde44ad_fa90_40ba_a2e9_a5969d1b99e8"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2003_c346440a_0e94_4886_aadd_c93f4d3af841"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077679Member"
      id="t_16_a5df1fca_66b2_efcd_f0bd_5f315a0a99e0">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_17_8b32a7ed_a18b_8bb5_b318_98b8170d8d47">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_18_f379f7be_43bc_aa17_3f02_98e7e89a552b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_19_f178ffc6_de01_30ed_9861_ef13a94f5358">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077679Member"
      decimals="INF"
      id="h_2004_3198392f_1888_417d_90a0_c97734e88035"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077679Member"
      decimals="INF"
      id="h_2005_af5be303_5060_4c79_8b41_836aecdfe245"
      unitRef="Holding">57</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077679Member"
      decimals="INF"
      id="h_2006_4c9ef8d5_5752_4392_934c_82a3e525c79c"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077679Member"
      decimals="4"
      id="h_2007_3c4014a9_639b_4534_aeea_fcbd3b450b01"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_20_06e187a7_b049_b244_a09e_eb6993bcc883">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277719.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077679Member"
      id="t_21_6cef88e7_b979_b984_9004_5d01538eb1cd">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_2008_f0ef28b8_1cc4_401d_b5f9_8509e26702d6"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2009_783fb151_0bbb_4168_bb2a_438ec9c8c862"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_VistraCorpMember"
      decimals="4"
      id="h_2010_6d1ca659_e4f4_4b78_82db_4b061dd15c20"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2011_19e40aa5_ac30_45a4_85bc_909c65824c24"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2012_d8be32ea_c300_44e8_9221_27d355c90afb"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_CommonStockMember"
      decimals="4"
      id="h_2013_e1ce6064_8566_46ec_bb16_5a4c76dc2a05"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2014_76013338_e04b_4bfa_a5d2_b8c9da7d19ce"
      unitRef="pure">0.020</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_PreferredStockMember"
      decimals="4"
      id="h_2015_59a5e688_77dc_405d_9dc6_824329c6e718"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2016_8bc583c2_c820_484c_ab2c_0d3cf74d0215"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077679Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2017_8c20350f_761f_40a2_95ab_0e3ea9b2bc2c"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000083520Member"
      id="t_1_fc5fb9f9_3e67_e3a6_ef95_c08340ba9702">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083520Member"
      id="t_2_0f8dcfdf_c897_0828_a092_7eff96c4fbb0">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083520Member"
      id="t_3_caf9490e_ea7d_2ae6_f5f5_71db74727ce6">JANRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_5_c8f2f9f1_6a43_836f_322f_de0fbcd24486">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083520Member"
      id="t_4_715c43d3_56da_4d73_e1ee_bba2dc0a0edd">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_6_e79bd205_e84a_9cd4_45b5_c83a3474a4fa">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083520Member"
      id="t_7_cba829c6_3c98_83cf_d0e2_6ac58c003571">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083520Member"
      id="t_8_39143b69_325f_7fd5_5287_ff84c96ab92e">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_9_85a22b30_25aa_ca3b_d902_7f53ed6ed478">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class D Shares/JANRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;96&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083520Member"
      decimals="INF"
      id="h_2018_4156a3bf_d1f0_4fd8_b02d_6ad7bb453141"
      unitRef="USD">96</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083520Member"
      decimals="4"
      id="h_2019_e406e195_44b0_4c48_86ad_e18f95b28e73"
      unitRef="pure">0.0082</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_21_2c78fd76_0a36_739b_10a5_e20a8e3cfded">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class D Shares returned 33.23%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_11_8b44dbde_35fc_c16e_03d0_8922197542c0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277748.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_12_0cc3018b_f266_9dd9_da1f_ba44b443f338">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class D Shares/JANRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083520Member"
      id="t_13_e41926d8_c4b9_477d_f1a6_0992a23e2438">Janus Henderson Global Select Fund (Class D Shares/JANRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083520Member"
      decimals="4"
      id="h_2020_a00ecbc7_4f35_4e37_a564_1e6dc926ced4"
      unitRef="pure">0.3323</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083520Member"
      decimals="4"
      id="h_2021_dce1b46a_0485_46d8_abd4_4b6f0120262e"
      unitRef="pure">0.1360</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000083520Member"
      decimals="4"
      id="h_2022_679a459e_e34d_4684_ac20_c401e1a968ad"
      unitRef="pure">0.1003</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_14_05629d4b_6be1_99f6_d46f_383e05671d07">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2023_3630dde0_de54_44ba_aced_d1840051945b"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2024_c9a672c4_dca4_4af0_8c5f_909295232916"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2025_39afc135_8292_4f3b_bb66_2e7aaf7eb05f"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083520Member"
      id="t_15_179314d3_a8c9_db17_621e_3a020fdff837">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_16_5bca5423_5bbe_15eb_5404_b2869b803b87">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_17_f3e59ee8_5aa8_b838_3290_c2afba8d343e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_18_177e7498_c24a_d8f3_703e_60452a89faa9">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083520Member"
      decimals="INF"
      id="h_2026_36735e2a_7e2a_413f_80cf_a63b09f5ee1d"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083520Member"
      decimals="INF"
      id="h_2027_d5f8d07b_5b4e_41c0_82a8_db53fe418baa"
      unitRef="Holding">57</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083520Member"
      decimals="INF"
      id="h_2028_8891fd12_dc12_4985_a6ea_149caa71bb88"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083520Member"
      decimals="4"
      id="h_2029_88fa40fa_6066_4186_877d_516d710903f4"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_19_af3f3ed8_96a7_b763_3275_2fb5540301f8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277758.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083520Member"
      id="t_20_45794362_6ca9_7a04_9648_1b4f4c5f1b96">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2030_6d3c1d95_17f7_4bfd_b81a_f4941772197d"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2031_1ba170b9_a488_4792_bdb2_ee1a76a3bf93"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_VistraCorpMember"
      decimals="4"
      id="h_2032_4fc61849_a280_44be_8f63_db5f2c9a1504"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2033_4eac479f_8a6a_40b2_946d_8db351be80bf"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2034_0cc3259e_24d3_434b_85d5_5512b3de4b59"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_CommonStockMember"
      decimals="4"
      id="h_2035_79f7e39b_86fb_4a55_be42_eb01661cf3c1"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2036_617cb093_5859_426a_b1f6_3e44eabdb7b9"
      unitRef="pure">0.020</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_PreferredStockMember"
      decimals="4"
      id="h_2037_15aa3e43_2a38_4c4d_84ee_7662c2e2c569"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2038_8e167cf2_b431_4731_8334_f8c4000144a4"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083520Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2039_c9c2e453_0d04_4e89_b466_392e52ad5718"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077680Member"
      id="t_1_57142509_03c5_6167_8b6f_1082d40747f0">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077680Member"
      id="t_2_3319781a_7045_d3b3_a54a_ebc2c9edd0e2">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077680Member"
      id="t_3_c05193d2_85a1_32cc_c5c2_33c86d3fac84">JORFX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_4_bb9a682d_00a5_c106_166d_a09d913494b4">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077680Member"
      id="t_5_c16a3875_0533_4060_d09c_c64627638e59">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_6_f55868b5_c04d_182e_3b17_8f286bd66b79">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077680Member"
      id="t_7_4f99e683_0a9e_97b7_7020_23f7f091872c">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077680Member"
      id="t_8_2edcdd95_493d_3324_e1f4_87f5c01375f8">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_9_ea1d7c4f_c5c0_557c_5e14_9ef0216ac721">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class I Shares/JORFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077680Member"
      decimals="INF"
      id="h_2040_9df6e072_36a9_40a3_b618_63d4f83330c8"
      unitRef="USD">93</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077680Member"
      decimals="4"
      id="h_2041_6c2038c9_0358_4c77_bda3_be9cbcb57c86"
      unitRef="pure">0.0080</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_21_7b2d521a_5538_6ffe_c6d8_ee7e9a162eeb">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class I Shares returned 33.20%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077680Member"
      id="t_11_3f2d61b8_29d2_bbcc_4b26_c98eaf590403">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277787.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_12_a0a5d427_5682_12f0_fd28_03901d44e6dc">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class I Shares/JORFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077680Member"
      id="t_13_74932583_bcc5_bdf9_293a_ace7bb8bd596">Janus Henderson Global Select Fund (Class I Shares/JORFX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077680Member"
      decimals="4"
      id="h_2042_1df1c87a_5f59_420e_b732_646a99b019bb"
      unitRef="pure">0.3320</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077680Member"
      decimals="4"
      id="h_2043_8d22a1f9_bb27_4f02_aec2_1afdbf8155be"
      unitRef="pure">0.1363</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077680Member"
      decimals="4"
      id="h_2044_0994bb44_c4c0_4f27_bba0_38d30f5a86be"
      unitRef="pure">0.1011</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_14_418769b3_a735_1c3f_5e9a_74dacec9d2a0">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2045_ba885372_ff5c_4c2d_9b8c_536e7871b28e"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2046_47f8d372_20ee_4724_b90b_07472a968e3f"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2047_82e2819f_134d_49c7_a8ca_250ef5614a3b"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077680Member"
      id="t_15_98aba046_ed76_a3a9_f579_542fa59a86d3">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_16_7c4aedba_6ba4_0466_ecf5_eae650609146">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_17_9aa1cf8f_c402_5279_e671_68174ba97f63">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_18_5b892938_7d94_72b2_f682_6fd527e0a18c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077680Member"
      decimals="INF"
      id="h_2048_c3e0a3e1_0a59_4cee_86fd_34b5b2377467"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077680Member"
      decimals="INF"
      id="h_2049_c442eea7_c6a9_44b3_a4fe_f15f82696578"
      unitRef="Holding">57</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077680Member"
      decimals="INF"
      id="h_2050_bad2a8a4_35f4_497f_b329_998edc0562c5"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077680Member"
      decimals="4"
      id="h_2051_f1d345b5_5d1f_4fe1_9f87_4d2501fd248c"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077680Member"
      id="t_19_105e7ddd_da94_4aea_ec58_5b2a6008aac4">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277797.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_2052_fb5c83b7_2d81_4017_be0f_ad348f7f89bc"
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      id="h_2053_3a234cf1_a55c_4c13_b24b_35dd9a304308"
      unitRef="pure">0.050</oef:PctOfNav>
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      contextRef="TI20240930_C000077680Member_VistraCorpMember"
      decimals="4"
      id="h_2054_fc79b72d_dddf_4691_90b8_cc0d397f71c4"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077680Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2055_4feef6c6_a984_4be0_88e7_426aa78c2344"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077680Member_TeckResourcesLtdMember"
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      id="h_2056_076cc71c_ce97_4574_a627_cc221a2325ec"
      unitRef="pure">0.035</oef:PctOfNav>
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      contextRef="TI20240930_C000077680Member_CommonStockMember"
      decimals="4"
      id="h_2057_c42e2a13_71c0_4e73_bfb6_39bb85d75006"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077680Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2058_d3616279_da99_433e_92b3_4a25e8d80017"
      unitRef="pure">0.020</oef:PctOfNav>
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      contextRef="TI20240930_C000077680Member_PreferredStockMember"
      decimals="4"
      id="h_2059_4842b58a_f085_48e3_9ec6_9a50be046e22"
      unitRef="pure">0.008</oef:PctOfNav>
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      contextRef="TI20240930_C000077680Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2060_fa2afa0a_8c29_4e3e_b251_efb1650e7625"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077680Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2061_0bc92291_e8dc_49b0_81f6_55df6255ea50"
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    <oef:FundName
      contextRef="FY2024_C000114874Member"
      id="t_1_7612c494_7bc4_ef03_89a0_5f612b841d23">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114874Member"
      id="t_2_4f6ce72a_9d12_1ed0_a62b_86843a56b365">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
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      id="t_3_99455a37_b1e3_7014_7ab4_ee12e3d9f788">JSLNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114874Member"
      id="t_4_d8fbee42_bfb3_946a_9097_be44930510a0">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114874Member"
      id="t_5_d3a80c3f_b072_5591_3ce0_0d37d5d24580">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114874Member"
      id="t_6_11e26510_94ba_7ec5_5608_67cf0f502711">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114874Member"
      id="t_7_6183bdd5_2079_540d_cd69_ae9531c6f676">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114874Member"
      id="t_8_4d1999ad_5a8b_1aea_dd09_82831908380a">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class N Shares/JSLNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;79&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114874Member"
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      id="h_2062_97f88700_e7f1_45ac_93f8_918b46d50d3a"
      unitRef="USD">79</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114874Member"
      decimals="4"
      id="h_2063_4c348286_234a_4d78_997a_931681ad01bf"
      unitRef="pure">0.0068</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114874Member"
      id="t_22_13de64d1_d1eb_c83b_afb2_2d3b212b7885">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class N Shares returned 33.39%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277826.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114874Member"
      id="t_12_b2d32eb5_9f6b_8c9d_977b_f030f734e0e6">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class N Shares/JSLNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      contextRef="FY2024_C000114874Member"
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2064_93c6a633_24f1_4593_81a3_aec8d87791ab"
      unitRef="pure">0.3339</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000114874Member"
      decimals="4"
      id="h_2065_fb453196_cef6_4d33_904f_9c16182930c6"
      unitRef="pure">0.1376</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2066_ca90b990_f198_4061_9182_656f8b74cd1e"
      unitRef="pure">0.1013</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_14_1974a88f_503a_9ac9_6795_be22986e6ee8">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2067_a123530e_0206_45a5_a3ca_4a748b08b0e1"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2068_a0fd02ab_f5f7_4624_bc0d_09ee3bd1d15f"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2069_6c577dd9_a4b8_47b6_bbba_6e2e6cc0b8bc"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114874Member"
      id="t_15_56331d92_d4a3_5da5_1b54_afe912d9d100">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114874Member"
      id="t_16_f373d9e0_3af4_30e4_7fd9_b787af220ae7">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114874Member"
      id="t_17_94fa1b56_1ba2_a831_c09d_9ed433a48282">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000114874Member"
      id="t_18_341c2c2b_a141_14ae_93bb_e2146ca691ef">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_2070_ebccaa2e_027a_407c_af32_e17b298a0f9c"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
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      id="h_2071_04d35943_0f45_48e9_bd3c_2d19fcb2d87d"
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      id="h_2072_3a1d1f1c_4185_4574_a8ce_51eff851e6af"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
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      decimals="4"
      id="h_2073_17692a30_a4eb_4294_9a3b_0d9b3cb4fcf2"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="FY2024_C000114874Member"
      id="t_19_723ee2b9_e0a7_4842_3e83_94d9c1180c91">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277836.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114874Member"
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2074_3dedf8cc_0963_4545_b8b8_2202ea2ae20f"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2075_e8bb7586_f5df_48e7_8eb8_06177f0a21fa"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_VistraCorpMember"
      decimals="4"
      id="h_2076_3a8b8a98_14d0_4b3d_9794_7060fd16a9fa"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2077_eb5437ab_0ec0_482a_8fad_068699b1c980"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2078_6170b60f_d5fa_485a_af3c_14a8b5a92efa"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_CommonStockMember"
      decimals="4"
      id="h_2079_8f92eee2_3793_4182_9264_4356dfa6741f"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2080_4ab1181c_8d02_43ab_a65b_5bf00da2ee02"
      unitRef="pure">0.020</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_PreferredStockMember"
      decimals="4"
      id="h_2081_50931071_e0a4_4e31_b016_2428150b8898"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2082_7ae022f7_4858_4ff3_b1c4_7a421a4a280c"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114874Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2083_5c39c848_1590_4962_8503_ada87c25d887"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077681Member"
      id="t_1_1230766b_1ea6_a158_6e13_5484eed941a0">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077681Member"
      id="t_2_659cb3a0_f129_bc61_be25_49a8dd21727b">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077681Member"
      id="t_3_b60ba6bc_e385_8846_f900_ee3ca993ec25">JORRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_4_f4a807cb_f59d_3422_b681_4a7fd6a81870">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077681Member"
      id="t_6_777373cd_3a11_e881_51f3_42f66fecab5f">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_5_ea04d214_fdcb_1fee_6002_a6ba1dd05e22">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077681Member"
      id="t_7_39cd2c45_b63f_feca_7306_c789271a67d0">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077681Member"
      id="t_8_d668b7c0_6a7b_224e_39f3_611f480b411a">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_9_edd1bfda_d455_3ddf_237c_07a0354e539d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class R Shares/JORRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;181&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077681Member"
      decimals="INF"
      id="h_2084_115ee54d_eb87_43ec_b514_7b846137abc4"
      unitRef="USD">181</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077681Member"
      decimals="4"
      id="h_2085_21f84d02_b236_4cae_8015_8c2d477b4d00"
      unitRef="pure">0.0156</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_23_28f3b2d9_91ec_9488_23c5_9aee92e1f239">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class R Shares returned 32.22%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077681Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277865.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_12_130604d8_6041_ae23_f37e_143c0e2aef1a">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class R Shares/JORRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077681Member"
      id="t_19_f4b6b168_48ec_1758_328e_c4cfe9eb298f">Janus Henderson Global Select Fund (Class R Shares/JORRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077681Member"
      decimals="4"
      id="h_2086_18eb3646_cdb0_4a61_be0a_0bcab2c9a8d8"
      unitRef="pure">0.3222</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077681Member"
      decimals="4"
      id="h_2087_617ed328_fa3e_4830_8db6_98826af2a23e"
      unitRef="pure">0.1272</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077681Member"
      decimals="4"
      id="h_2088_400a8028_d82a_4f27_845d_d4499a58451a"
      unitRef="pure">0.0925</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_20_d7a6be4c_1d9d_ede8_f6cf_995a27ac46ea">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2089_808d4ba0_0f17_47f6_80d2_2a53c2ef9eb3"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2090_453b1306_5ea9_46b0_914b_e9de3ca64c92"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2091_c1696113_7237_4d1f_b05b_89bf1c2a3b52"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077681Member"
      id="t_13_a3677b1b_f98d_c187_5353_77339d64f1a4">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_14_74cb2fbf_bdee_0574_e642_c1bc7e0f6720">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_15_3bbaaedd_2ba4_3933_e319_4a208c60eaf9">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_16_6a0d46ab_527f_6fc5_7263_7627a09cd0ba">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077681Member"
      decimals="INF"
      id="h_2092_d5c505fd_e1c8_4779_bea1_2d2038a0ac05"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077681Member"
      decimals="INF"
      id="h_2093_3e4723b7_8303_4e54_8a39_abfc43d7e5e9"
      unitRef="Holding">57</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077681Member"
      decimals="INF"
      id="h_2094_5b689a71_6298_45bd_8566_a637bddf61f2"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077681Member"
      decimals="4"
      id="h_2095_ce18e53f_bd95_4100_a020_169efb53316c"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077681Member"
      id="t_21_ff206e80_2c0f_3d73_cd31_4f2b524be389">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277875.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:PctOfNav
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      id="h_2096_fd48be0c_4ca4_4539_93e7_e3b722a50b93"
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      id="h_2097_e19ca9a1_17c2_40c0_b653_a3c07110d043"
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      contextRef="TI20240930_C000077681Member_VistraCorpMember"
      decimals="4"
      id="h_2098_b5aa4075_c46a_4e9e_9863_29dfde261c3d"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077681Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2099_27a59990_518c_46bb_8acc_34a779553127"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077681Member_TeckResourcesLtdMember"
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      id="h_2100_29adee65_6547_468d_90b6_78bbdd80c9cf"
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      decimals="4"
      id="h_2101_4034d35d_6e65_41b9_ab50_281551170b7c"
      unitRef="pure">0.969</oef:PctOfNav>
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      decimals="4"
      id="h_2102_d8ef8757_ab13_429f_b379_2021ffe5829f"
      unitRef="pure">0.020</oef:PctOfNav>
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      contextRef="TI20240930_C000077681Member_PreferredStockMember"
      decimals="4"
      id="h_2103_5270eeeb_21dc_4fbe_91f2_b660062897cc"
      unitRef="pure">0.008</oef:PctOfNav>
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      contextRef="TI20240930_C000077681Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2104_a2bfc4f8_5640_44d9_9584_aadb9330a951"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077681Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2105_7cb3672e_4a06_4ae3_a15f_4eadc47ffcf3"
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    <oef:FundName
      contextRef="FY2024_C000077682Member"
      id="t_1_d8d748b1_35ad_50fe_9693_621574766338">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077682Member"
      id="t_2_3a2d8a11_8923_5385_2237_5ee5a7042cad">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077682Member"
      id="t_3_3f81bcf4_609f_9d63_a95a_1af8078b7f9d">JORIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_4_fb8b3913_5d22_962a_e331_07a03a65d012">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077682Member"
      id="t_6_3349df11_fdfe_49f4_27f6_269364f45ab6">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_5_4270a213_313e_0933_ed9d_53876b4651ee">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077682Member"
      id="t_7_14cdb5bb_d0ee_80d2_8353_b0555d2e6f96">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077682Member"
      id="t_8_3fcf42e0_74b3_8c4f_4df3_ceac19508f85">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077682Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class S Shares/JORIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;150&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077682Member"
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      id="h_2106_13cd0689_f467_4310_9c22_64a5b01170a3"
      unitRef="USD">150</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077682Member"
      decimals="4"
      id="h_2107_7d1bd03f_5e9a_491e_a283_7a0082f7f8fc"
      unitRef="pure">0.0129</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_21_4afbb441_b598_c0dc_d5ea_3eb634d395b0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class S Shares returned 32.56%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277904.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_12_6b47cdbf_08ff_5a82_6938_696432b71aa8">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class S Shares/JORIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077682Member"
      id="t_19_c953e711_11e6_bb40_9a13_45672605fb2b">Janus Henderson Global Select Fund (Class S Shares/JORIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077682Member"
      decimals="4"
      id="h_2108_bffe4487_ee99_45ee_8761_b6d0a847b386"
      unitRef="pure">0.3256</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077682Member"
      decimals="4"
      id="h_2109_eb1bd49c_48fe_47fa_abbf_2df8a1bbf4e3"
      unitRef="pure">0.1301</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077682Member"
      decimals="4"
      id="h_2110_3b02b492_24f4_48c5_bd0a_487425f1d693"
      unitRef="pure">0.0954</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_20_cb5ec011_4b5f_1ed3_c6e7_c4522cfe67dd">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2111_4e6405de_9ff2_443b_9898_7b0997e15edb"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2112_be9fda54_8303_4e7c_a9ab_7ce742c97523"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2113_35ce89e0_7222_45e4_a2dd_e9d1bff6451f"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077682Member"
      id="t_13_8dd86fed_1d43_600b_a457_56052cd1fa34">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_14_61c2bc88_8c79_b2c5_72a3_1ceeaf9b269b">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_15_32a1186b_ddb5_21b1_4531_4f9555c756ee">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000077682Member"
      id="t_16_8f18b258_23fd_1af0_a703_83711d5b0327">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077682Member"
      decimals="INF"
      id="h_2114_ef60ebd5_2460_44b7_9d41_19c8c32b3def"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077682Member"
      decimals="INF"
      id="h_2115_4b7be5a5_09cc_442c_9d95_a03e966ffe7e"
      unitRef="Holding">57</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077682Member"
      decimals="INF"
      id="h_2116_1cbc4a4b_15b9_43d2_9ebe_5717d62d8562"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077682Member"
      decimals="4"
      id="h_2117_d42d06e1_de3b_4833_b676_1a6485c0f375"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_17_e3f88dad_edf3_d380_5552_9b9235f7363c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277914.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077682Member"
      id="t_18_8427c842_3fd8_caa8_de19_519c6f763d66">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2118_801412ff_8a17_44b7_a8c6_9d62cee9ef80"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2119_ca3f8041_7c40_4182_a0c1_33d676d69fce"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_VistraCorpMember"
      decimals="4"
      id="h_2120_ab91ce50_e495_42fe_8b1f_d2ead6978978"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2121_bbb86a7b_d926_4ddf_9209_c64f6d5ba4d0"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2122_a3f8c713_c553_4988_94ed_df6146251b10"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_CommonStockMember"
      decimals="4"
      id="h_2123_713eb382_97e4_4f29_9cfd_8109f8a7c29d"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2124_d3afebfd_661e_46bd_a606_e9b18a077f13"
      unitRef="pure">0.020</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_PreferredStockMember"
      decimals="4"
      id="h_2125_4599fa39_07cc_4d4d_a399_738f8ff450f7"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2126_338d094f_95e6_4e1d_98c4_8b7519581475"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077682Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2127_89d8729f_a2c2_4b74_a7fc_346adf5776c9"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028933Member"
      id="t_1_a748bc50_3448_1039_a5c0_b905ae197960">Janus Henderson Global Select Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028933Member"
      id="t_2_5934cee2_0d63_fe9b_d1c7_8cd3aed18d06">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028933Member"
      id="t_3_ed63ee1d_687d_8338_2f8d_db5bc32b5157">JORNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_5_3a701dfd_6e77_e615_7d2f_f4211b7f293d">This annual shareholder report contains important information about the Janus Henderson Global Select Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028933Member"
      id="t_4_802984ef_67eb_21ff_9de4_5ce6b47dde38">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_6_d9c8e7d9_eca8_0cc9_d8bc_323e01e426fc">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028933Member"
      id="t_7_073bdeed_7d80_426c_f5b7_85d913d9d0a6">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028933Member"
      id="t_8_0981494c_afa8_876b_409e_001c8726fb61">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_9_3bad50cf_c404_07e6_3c23_c73f900bb2e6">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund&lt;br/&gt;(Class T Shares/JORNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;106&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028933Member"
      decimals="INF"
      id="h_2128_9249f58c_1c60_408c_b692_e472ee143647"
      unitRef="USD">106</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028933Member"
      decimals="4"
      id="h_2129_304d91b1_219f_4294_8002_849c2d19d9d5"
      unitRef="pure">0.0091</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_21_cdd9305d_dc82_6d90_6e6d_9fe313327409">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Select Fund Class T Shares returned 33.06%. Its broad-based benchmark, the MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 31.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Vistra Energy contributed to relative results. The U.S. independent power producer delivered strong profits growth and guidance, supported by increased energy usage to power artificial intelligence (AI). Taiwan Semiconductor Manufacturing Company, another contributor, delivered strong revenue growth, fueled in part by its fabrication of advance components used in AI.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted on a relative basis. The Hong Kong-listed multinational luggage company reported lower-than-expected revenue growth and reduced guidance that partly reflected weaker travel spending in China. UK-based online sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the US sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000028933Member"
      id="t_11_e18deb0e_caf5_aa04_f377_58548bcfd55a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277943.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_12_81767ade_0ea4_7444_8431_fdcb3da3e2a1">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Select Fund (Class T Shares/JORNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;31.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028933Member"
      id="t_13_fe56e5f6_f98c_d42d_6786_4247a0cca1b3">Janus Henderson Global Select Fund (Class T Shares/JORNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028933Member"
      decimals="4"
      id="h_2130_4cca3a6d_b4f5_402f_be2b_8cf30f4272b1"
      unitRef="pure">0.3306</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028933Member"
      decimals="4"
      id="h_2131_fe085bd6_04e1_4a42_b7af_971e030f717d"
      unitRef="pure">0.1349</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028933Member"
      decimals="4"
      id="h_2132_3d3b2fb1_41ba_4ba2_83d3_41e3c6290a94"
      unitRef="pure">0.0995</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      id="t_14_f958c5ba_33e2_f493_7fd3_a8d90fd35871">MSCI All Country World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2133_476c39e7_688f_4fa9_adbb_5baa39456e04"
      unitRef="pure">0.3176</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2134_79964a92_64c8_438f_a1b7_2feec63920fb"
      unitRef="pure">0.1219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldIndexSMMember"
      decimals="4"
      id="h_2135_3b713c84_532b_478e_8030_ff3bd74dfb95"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028933Member"
      id="t_15_577744c2_68ab_755b_62be_e0e1bf530815">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_16_9004c9cf_1f9b_fc8f_b2d3_f832264340a8">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_17_d6319c81_5fec_2b0b_8cc4_79b1c997a04c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_18_f31f3284_4b00_1443_7aa8_0335d0cca8b8">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,923M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;57&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;17.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028933Member"
      decimals="INF"
      id="h_2136_5276ac48_e572_465e_9c3d_f3812968d307"
      unitRef="USD">2923000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028933Member"
      decimals="INF"
      id="h_2137_65f0d5da_99ce_4bc2_8786_91c04dfb258f"
      unitRef="Holding">57</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028933Member"
      decimals="INF"
      id="h_2138_1a0f739a_cd83_4d94_8267_f1ca7c3a3e8d"
      unitRef="USD">17000000.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028933Member"
      decimals="4"
      id="h_2139_ea441c75_76ef_4126_bbd6_3ccf99e77dab"
      unitRef="pure">0.36</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_19_27939089_961a_506e_4ea0_068e58147a18">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;96.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277953.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028933Member"
      id="t_20_ddef3034_bb46_f044_1548_fad45d842506">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vistra Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_2140_a4111403_defa_4f82_9195_87f348d1d0b6"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2141_a43cd56e_5603_4e23_be4a_58d32ef61ab4"
      unitRef="pure">0.050</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_VistraCorpMember"
      decimals="4"
      id="h_2142_fdb6a990_b87a_4d4d_b486_7552a139dda3"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2143_a356bd90_10bc_43e2_ac03_40696d8e95bd"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2144_68673379_7754_4c6f_9f7c_5ada0116f2a8"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_CommonStockMember"
      decimals="4"
      id="h_2145_405b061f_2570_4c77_aa3b_1ea2368ba381"
      unitRef="pure">0.969</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2146_dde2afe7_94c0_408b_ae2f_f12e5d4f997e"
      unitRef="pure">0.020</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_PreferredStockMember"
      decimals="4"
      id="h_2147_79d0b89f_5f18_4c9e_913d_7f7fec3f4d65"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2148_c7b7e226_7223_4bdc_94c5_fddd990a7abe"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028933Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2149_38c87ce2_3aee_4b67_aa16_5344cb11b09f"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219909Member"
      id="t_1_b75bd270_3bd9_3d50_2fc2_95d39a65abeb">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219909Member"
      id="t_2_440e133e_3ef4_64b9_7760_8b72e2057f55">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219909Member"
      id="t_3_a6e52f77_a50d_0a88_6b5e_10569b599428">JEASX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_5_c4730efc_2c77_bbd1_aaeb_92cbd2790a95">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219909Member"
      id="t_4_ba3ab906_40c3_8b12_37c8_c5f355d97af0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_6_3a3fae86_64c0_db27_3377_de71ac98727e">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219909Member"
      id="t_7_5e46d494_ddff_3167_4f88_93e164cc9de7">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219909Member"
      id="t_8_417a6c92_b90d_caac_3ef1_a979237d1580">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_9_2e3f5792_b73a_92fb_dc0e_6a8eeeb63943">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class A Shares/JEASX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;143&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219909Member"
      decimals="INF"
      id="h_2150_20f2673d_1823_44c3_9586_fa1a1c4b6769"
      unitRef="USD">143</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219909Member"
      decimals="4"
      id="h_2151_0394a014_4d87_4d0a_b908_48adf429b4cb"
      unitRef="pure">0.0123</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_22_41ab9467_3273_571a_7913_86ee65994670">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class A Shares returned 33.14%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_11_b4564e9e_ddd7_071a_61ef_0ae3e1419a95">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275174.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_12_b8489bb9_bc6d_b2b9_e507_c45167c8c9bb">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class A Shares/JEASX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class A Shares/JEASX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.53&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219909Member_WithoutSalesLoadMember"
      id="t_13_5f6ba824_b120_2485_9eb9_e24a1fd176b3">Janus Henderson Global Sustainable Equity Fund (Class A Shares/JEASX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219909Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2152_1ce6bd4d_760e_4df3_89ba_79946a519a81"
      unitRef="pure">0.3314</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219909Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2153_056e8208_ec9c_4288_800b_e4ac5c8335c7"
      unitRef="pure">0.1246</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219909Member"
      id="t_14_74f0057b_b783_3d37_2381_ad256732fb7f">Janus Henderson Global Sustainable Equity Fund (Class A Shares/JEASX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219909Member"
      decimals="4"
      id="h_2154_419a7423_70f5_493f_8961_832eb72ce2ac"
      unitRef="pure">0.2553</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219909Member"
      decimals="4"
      id="h_2155_3d9f4ae8_66a3_4c4c_93a1_7499377951a8"
      unitRef="pure">0.1090</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_15_16132103_474f_fe02_558d_5c10ad2e7063">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2156_18064f30_400f_4f38_9725_60c15b18027a"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2157_d7822551_b5de_487a_bf22_e9d8757a444b"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219909Member"
      id="t_16_aa5436c5_7d71_a59c_0155_75c0d3e084cd">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_17_53255c0d_a261_9fa7_2b1c_488b8495b270">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_18_2e5203da_6ee7_35a8_9cfc_dd61763e444c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_19_237d9c24_e258_4959_7596_84fa18f0fd64">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219909Member"
      decimals="INF"
      id="h_2158_0d2e2989_7e2f_4949_9cae_442f91459fe5"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219909Member"
      decimals="INF"
      id="h_2159_1c336f7b_57ff_49bb_ae43_361805937ccc"
      unitRef="Holding">55</oef:HoldingsCount>
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      contextRef="FY2024_C000219909Member"
      decimals="INF"
      id="h_2160_c512c69b_d08c_4f33_a5ef_2891194f7304"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219909Member"
      decimals="4"
      id="h_2161_cc1d8b53_881b_4ecf_8906_31ad0fce5936"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_20_63066380_ba37_5ed3_665a_9ec815a11087">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275184.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219909Member"
      id="t_21_e54af7e6_d3b7_ee5f_c7b2_323a1312a1f2">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2162_58ac5676_5383_4190_b9cd_5e44a60f4119"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_NVIDIACorpMember"
      decimals="4"
      id="h_2163_11ebf5aa_db2a_49e5_8b34_9c74cd9f9342"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2164_94c6dedd_2b17_46f2_b448_a3456fd85727"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_WabtecCorpMember"
      decimals="4"
      id="h_2165_61f7afca_0b9f_4708_964e_e3ca5428a83c"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2166_e4d0c660_7d50_462a_bb66_bcb3b4d8f80f"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_CommonStockMember"
      decimals="4"
      id="h_2167_6e004852_f64f_48a3_bd79_0521c41b5140"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2168_eef308ae_e66c_494c_901b_6ada05b3a1fc"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219909Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2169_88195f6b_5675_444e_9d89_8c5df42940d5"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219911Member"
      id="t_1_2465295b_0e5e_c707_0828_e31dae3485f7">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219911Member"
      id="t_2_2613fb05_4041_2855_6c8d_c42e017e30b5">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219911Member"
      id="t_3_50d6daf2_7ad3_7425_4cdf_a6a104bd4266">JECTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_5_8c7aebfa_cb3c_89a0_05af_1f258242c3e3">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219911Member"
      id="t_4_99b8bbf3_960e_b4b0_0d54_5f9367f393df">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_6_e59b792a_9cb1_4154_cc42_7bd34dd92edc">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219911Member"
      id="t_7_9dc719a3_3726_5e4f_0ac8_ef35bc5c44f9">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219911Member"
      id="t_8_fffdde5e_879f_2d82_01dd_7589bef2822f">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_9_5437f4de_1f4b_6733_388b_b2cb0f288c5e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class C Shares/JECTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;153&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219911Member"
      decimals="INF"
      id="h_2170_2db91c93_57ac_41fe_88ca_533104f498e1"
      unitRef="USD">153</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219911Member"
      decimals="4"
      id="h_2171_e147932d_90e2_4c1b_bd83_ab4120e2b5bf"
      unitRef="pure">0.0131</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_22_8e02ac54_7c9e_6fc2_36ec_acf885f351fd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class C Shares returned 33.03%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_11_1ab5ee6f_306b_e7b0_24c3_8b6458d2a456">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275213.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_12_ae85478d_635e_9e5d_2ee4_547ec0735932">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class C Shares/JECTX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class C Shares/JECTX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.03&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219911Member_WithoutSalesLoadMember"
      id="t_19_a3c54992_d86e_4a90_0968_4d5179449bd1">Janus Henderson Global Sustainable Equity Fund (Class C Shares/JECTX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219911Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2172_b18b638f_e2c4_4d75_826b_961d595d9e2c"
      unitRef="pure">0.3303</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219911Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2173_5003229d_8ff9_4b20_84ee_3c95c0d51041"
      unitRef="pure">0.1246</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219911Member"
      id="t_20_5755e4ae_7e37_3221_e7fa_ab30511a8e6b">Janus Henderson Global Sustainable Equity Fund (Class C Shares/JECTX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219911Member"
      decimals="4"
      id="h_2174_7cff7abd_ed52_4da1_880e_1f53f54de499"
      unitRef="pure">0.3203</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219911Member"
      decimals="4"
      id="h_2175_79db502c_1335_41f3_a539_9e2225afb5f0"
      unitRef="pure">0.1246</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_21_bf31a4a6_4867_5cb8_13c7_465f97ee48b0">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2191_6b213b2d_9599_16dd_d732_b93a18c64cea"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2192_0dbd2123_c6cc_5cf8_05a3_6ad0d1d34cbf"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219911Member"
      id="t_13_1f270061_8ae4_7bb9_d8f4_ab10153a6396">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_14_7a541e30_4134_5533_4e44_e57be2aad157">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_15_7bbec67f_2cce_df8c_cd38_4c14298b5a27">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_16_8dc688d3_62e8_2a93_5cac_d8b41314fd01">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219911Member"
      decimals="INF"
      id="h_2178_4a4a6ed5_3241_4b4f_8195_d65b2a886fdb"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219911Member"
      decimals="INF"
      id="h_2179_3a23fb49_7b7c_4e87_a6b4_b96239914947"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000219911Member"
      decimals="INF"
      id="h_2180_051f1da0_1e5d_4079_9476_bab2b64eb205"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219911Member"
      decimals="4"
      id="h_2181_ade332c9_3554_45e2_b2fe_48ef178a3ea5"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_17_ff0f6ab8_6251_24d8_8a43_9531e831a92d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page; height: 67px;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 14px;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 14px;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 13px;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 13px;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 13px;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 13px;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 13px;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 13px;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 14px;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 14px;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275223.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219911Member"
      id="t_18_dff610ec_d6f3_76de_ce16_819c7ae1d061">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page; height: 67px;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 14px;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 14px;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 13px;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 13px;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 13px;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 13px;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 13px;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 13px;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt; height: 14px;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Roboto; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt; height: 14px;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2182_d7ac6150_4a6a_41df_82e2_bbfaa8f5d0a0"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_NVIDIACorpMember"
      decimals="4"
      id="h_2183_6497639f_8ba6_44c4_a461_e548fd4104f1"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2190_491ae57d_ccbe_3cf0_4fd9_3e72cb0e508b"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_WabtecCorpMember"
      decimals="4"
      id="h_2185_088f6def_81a4_4ba1_be57_8eb723f617fb"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2186_f170241f_2c52_4f00_93bc_671c6a8c02fd"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_CommonStockMember"
      decimals="4"
      id="h_2187_3d16ee07_f4ff_4540_bc2a_6a6d98be1e7a"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2188_c51d0ae0_763a_489f_93c1_c8ca3f6e6f6b"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219911Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2189_9a5181de_9aed_46a6_8daf_aa0f080819e2"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219910Member"
      id="t_1_c1e1ab71_04df_cfc9_796b_a20358f4bf0a">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219910Member"
      id="t_2_8fb61500_c120_47f7_ae9c_9e5f806b3be2">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219910Member"
      id="t_3_8f73ec5d_f82b_b0f9_a618_5ef44f0003d9">JEDTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_5_fd3b3522_a4e1_b92a_d653_738bdb45a767">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219910Member"
      id="t_4_3593d6fc_ed3b_7201_a525_9818d175368b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_6_99a49ff8_6927_3617_02d0_9d880fb3dd82">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219910Member"
      id="t_7_c342e22a_820e_a1fd_0573_ba692f786d66">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219910Member"
      id="t_8_3d5bd9f3_af91_7f96_4383_561d72bd9233">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_9_00f208ce_3a4c_c60b_35bb_c6f1dc36a5cd">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class D Shares/JEDTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;117&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219910Member"
      decimals="INF"
      id="h_2190_e2b1d48f_2848_4a69_a2c0_829328b4070e"
      unitRef="USD">117</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219910Member"
      decimals="4"
      id="h_2191_4be9fa64_60ba_4e2b_b067_9005e4e5dd9e"
      unitRef="pure">0.0100</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_21_e9f08934_a0c6_0fe7_4e17_4a1ea8b317d6">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class D Shares returned 33.39%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_11_322ceeb2_df75_482f_2e7a_0f4999850268">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275252.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_12_d257c517_e417_52fe_8eba_bf08c1618f8f">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class D Shares/JEDTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219910Member"
      id="t_13_9b0907f8_48a8_590c_1533_8ed2cc0c9d61">Janus Henderson Global Sustainable Equity Fund (Class D Shares/JEDTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219910Member"
      decimals="4"
      id="h_2192_ea5e18f0_c0e9_433a_a0c8_d8caacfdb2d6"
      unitRef="pure">0.3339</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219910Member"
      decimals="4"
      id="h_2193_5137580a_398a_469c_bce8_17740b0152ff"
      unitRef="pure">0.1258</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_14_3b470e6c_c675_8ec6_d8ea_070b77e22212">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2194_24e5209f_d6f4_4806_aa0a_f73cbace799a"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2195_d9b31a6f_bd76_4d08_9622_2c270e8ac745"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219910Member"
      id="t_15_15b393be_e7ff_7017_1aeb_c223d3eafa6c">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_16_6812a37c_2833_7d4a_2ce2_4dc2993ba42a">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_17_4e2fb5c8_3031_72b7_e5da_a5380ab16c99">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_18_7adf6ea6_1c60_b050_a025_bcb7db5359d5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219910Member"
      decimals="INF"
      id="h_2196_cac93a6e_72e2_4e10_996b_bbe764e485a0"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219910Member"
      decimals="INF"
      id="h_2197_86caffbb_881c_4197_af72_a2dc5309b44a"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000219910Member"
      decimals="INF"
      id="h_2198_fea75efb_b0e0_41e0_8565_eb27633a9185"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219910Member"
      decimals="4"
      id="h_2199_56ef0dbf_0e60_4f6a_a7ae_4263515cf76e"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_19_80c5a82e_df51_acb9_41c2_e42e45552e44">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275262.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219910Member"
      id="t_20_6a07948f_c54a_8709_5b62_139762b9f4ea">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2200_ea9374eb_82eb_4e84_a0f3_716f2c7d346d"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_NVIDIACorpMember"
      decimals="4"
      id="h_2201_1a166da0_960d_4c98_9920_ac468f4c7bb3"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2202_6ac2e74c_261b_4f3b_81ae_63ffaafb7d84"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_WabtecCorpMember"
      decimals="4"
      id="h_2203_2e8c34aa_47b0_4c7b_86fe_9a01d52436fb"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2204_1f608334_faf3_4231_b07f_7e0c7ea3e69c"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_CommonStockMember"
      decimals="4"
      id="h_2205_213e2f5e_19d7_4463_86e5_ab38e2428827"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2206_18762a1d_4414_496f_bb51_80062b653f56"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219910Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2207_62b14f80_a793_4688_95a3_f6b14a5222e4"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219912Member"
      id="t_1_d3e3a49a_0351_36f3_8ac0_efb1e02b4519">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219912Member"
      id="t_2_8fbeff53_24c0_94b7_4a1b_a329551b68fa">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219912Member"
      id="t_3_d5b44384_52d7_6e89_74c4_033b3006ecf6">JEUIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_5_6b7ac98a_cf4b_7058_b937_c979d1978dec">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219912Member"
      id="t_4_d27a9e6e_5630_3cd7_6aac_0a5826b90d06">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_8_d50736d0_4cf7_ee16_d629_13398f0ffd40">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219912Member"
      id="t_7_deecf868_8934_c4a9_827d_5a05c542cc88">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219912Member"
      id="t_6_9c6a33a4_ffc4_a9a1_3e88_0f503a4b2c06">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_9_677c8e1e_674f_bdeb_cc02_acb747526a29">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class I Shares/JEUIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;118&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219912Member"
      decimals="INF"
      id="h_2208_a9ad7700_74a7_4b80_8c47_ba55ca618b2f"
      unitRef="USD">118</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219912Member"
      decimals="4"
      id="h_2209_6f515bc3_3a37_40f2_8ac2_afa30b1a9037"
      unitRef="pure">0.0101</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_21_32ec45e4_4431_6174_277b_cf1b2f56097c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class I Shares returned 33.42%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000219912Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275291.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_12_6aebe139_f1e1_54c4_a1e8_d226d6b29885">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class I Shares/JEUIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219912Member"
      id="t_19_64cda275_f0cb_4e58_d508_cd373e2e1d73">Janus Henderson Global Sustainable Equity Fund (Class I Shares/JEUIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219912Member"
      decimals="4"
      id="h_2210_17ba1da5_4afb_43da_8396_320370032302"
      unitRef="pure">0.3342</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219912Member"
      decimals="4"
      id="h_2211_4bbd7a00_cf46_4f01_8b70_3a76935911f7"
      unitRef="pure">0.1263</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_20_f5db5995_3b5e_83f0_375b_984a46988d9d">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2212_ab8ac23e_4f3b_481d_8e5d_6c9e905f3596"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2213_5d02e283_8119_48ff_ba29_03b935d6c72b"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219912Member"
      id="t_13_b68d52bb_477e_63fa_bd9e_6d4c71ff9d01">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_14_ef6fbe0c_c7a2_3aea_2b15_e34f31661506">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_15_746a94df_f64d_06b0_4e4d_8bbccfe3ab36">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_16_70e4e546_21e2_c92c_35c5_93f2c2e1eed2">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219912Member"
      decimals="INF"
      id="h_2214_8db42da9_656c_4471_bebc_3de3a73f161b"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219912Member"
      decimals="INF"
      id="h_2215_206b8f28_004d_4278_8f0e_9fe6cfa3ca14"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000219912Member"
      decimals="INF"
      id="h_2216_5b7f05d7_5065_48cb_9a67_542aa1380e27"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219912Member"
      decimals="4"
      id="h_2217_bd5089a3_b9d5_4e81_a27a_af388e91a894"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_17_52372ce3_f7c0_a83f_fef3_d5f6ff9358a7">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275301.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219912Member"
      id="t_18_7f1b341a_925a_4624_c008_1eec2b95e335">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2218_55270adb_4d34_4eff_8b7e_258a9c544a51"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_NVIDIACorpMember"
      decimals="4"
      id="h_2219_b99c9f99_6f1c_4f99_b1af_b319fe0eb41f"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2220_f66a1aaa_ed07_4406_a19d_177a7915de49"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_WabtecCorpMember"
      decimals="4"
      id="h_2221_6da2f6ee_a895_4ab2_8de4_89310003ee3e"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2222_b2d6cf8c_6fdd_43cd_9366_10bfe6134a29"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_CommonStockMember"
      decimals="4"
      id="h_2223_b0e26d4f_6adb_404f_8deb_30201d292b67"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2224_1e314ba5_740f_4a89_9f4c_416bdd5a98a0"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219912Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2225_8aceedf8_3922_4051_8ab1_9c8a06e1ed04"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219908Member"
      id="t_1_58bff851_1435_9e3d_9161_83023f83c4bd">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219908Member"
      id="t_2_8cf11323_fcf6_8ad9_5675_b681b51699bd">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219908Member"
      id="t_3_91a27d80_f3b4_d73e_e971_54f180283c9c">JETNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_5_ea4315f7_b728_20cd_a994_63497eaf8d1f">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219908Member"
      id="t_4_2b04fa3a_c5e6_fee5_1120_9ee44d591779">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_8_b8373236_851f_3205_c1c8_a4505710971e">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219908Member"
      id="t_6_28606fab_545f_8ed0_82f9_583bf5d14ba0">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219908Member"
      id="t_7_466f07b4_d3e9_2f75_2785_1ca5d72487c3">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_9_8bc82af4_402b_ef05_2ade_3c3d66f7d521">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class N Shares/JETNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;102&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219908Member"
      decimals="INF"
      id="h_2226_1bd75345_c51f_4276_82e8_e1809505349e"
      unitRef="USD">102</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219908Member"
      decimals="4"
      id="h_2227_5a280ca1_2014_4a01_83dd_1ed87377cc5e"
      unitRef="pure">0.0087</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_21_89c2476b_aded_6341_4b33_92fcd206adfd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class N Shares returned 33.62%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275330.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_12_ce542d39_8260_0452_d3d9_4c8630b91939">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class N Shares/JETNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219908Member"
      id="t_19_4ef9f8c7_fb2f_be71_752a_906e271e8612">Janus Henderson Global Sustainable Equity Fund (Class N Shares/JETNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219908Member"
      decimals="4"
      id="h_2228_6de44d35_921c_48a6_80c6_b39ab2e594d6"
      unitRef="pure">0.3362</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219908Member"
      decimals="4"
      id="h_2229_5ae17350_1dce_4b17_98b8_a21c774abd86"
      unitRef="pure">0.1275</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_20_e5e5cae5_c386_078a_077c_73b26931f0dc">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2230_81db9e4d_684b_4a38_8b71_2772eadfd6af"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2231_f47cc438_5df8_44e0_87f4_14432358f43c"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219908Member"
      id="t_13_8cb80e2f_acba_e7c2_3a6f_b5675662617e">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_14_63e5e336_ae17_45c6_78c1_2b9e8d9d43cd">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_15_6e5b8cbe_5530_e07c_1d4b_2f840f40ba7d">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_16_70ab984a_1017_759b_6602_e4c65012f7ab">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219908Member"
      decimals="INF"
      id="h_2232_ebc1d6e2_21b7_4bf4_9786_75ab82740411"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219908Member"
      decimals="INF"
      id="h_2233_210b2f43_4aa2_4822_92f3_9398585e5e44"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000219908Member"
      decimals="INF"
      id="h_2234_93758e2f_9d61_4a88_b2ca_1d8b2c157772"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219908Member"
      decimals="4"
      id="h_2235_57b818ca_4dfc_4f64_b087_e04ceefc79d7"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_17_a292c5e4_b254_7dc6_caa9_46aba66b6389">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275340.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219908Member"
      id="t_18_c0444589_9729_4e01_cc94_8c4ee5d8913d">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2236_fb7b6204_9bbf_457e_93d2_96adb7783cd3"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_NVIDIACorpMember"
      decimals="4"
      id="h_2237_54eb4d07_483d_498c_a95a_f3de41799db5"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2238_ec0e6c29_a816_4d74_9d19_33f8becf26e7"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_WabtecCorpMember"
      decimals="4"
      id="h_2239_731eec18_f3ed_4182_939d_0bb648b3925e"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2240_fafead61_531d_4482_acaf_3379e3d3ce10"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_CommonStockMember"
      decimals="4"
      id="h_2241_35f3bdf5_1dc6_4a80_ad5f_3b8b1668a988"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2242_4e722491_0bd3_411e_8212_d3a67336bdb5"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219908Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2243_e3b1d90f_64fb_4355_bd7f_e40193f922a9"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000225293Member"
      id="t_1_f2cbaf66_1fed_41c2_f109_84f08dae8869">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000225293Member"
      id="t_3_e4717b01_2736_af7e_96fd_860bceefb4bf">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000225293Member"
      id="t_2_3e838353_ecba_9087_20eb_9a56f15d85ae">JEGRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_4_96d2ce73_d97e_15d9_3e2f_efaf129d02e5">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000225293Member"
      id="t_5_183e75dd_88f4_b026_d9d2_274b938b681e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_6_f92582fb_fcec_75be_1956_4ace73df76ae">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000225293Member"
      id="t_7_cb0b8125_a7fb_0fc6_a0b3_cf1e479b2890">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000225293Member"
      id="t_8_de51e3a6_a355_aa5d_b6c0_075ec5edced0">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_9_381c9584_b8ca_1dea_ac86_7affed80f599">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class R Shares/JEGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;126&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000225293Member"
      decimals="INF"
      id="h_2244_64311c0f_245f_45ba_a205_3399daa6c0dc"
      unitRef="USD">126</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000225293Member"
      decimals="4"
      id="h_2245_d20d2780_e457_43b6_85a3_555c2a88ac77"
      unitRef="pure">0.0108</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_22_303a34d5_579b_d1de_3206_b4ff7c092ce6">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class R Shares returned 33.31%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_11_46fb305a_01fc_4389_70aa_9e263cc70bdc">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275369.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_12_45d858c6_dca7_f387_e2ec_189e5aa64f71">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class R Shares/JEGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000225293Member"
      id="t_13_f4316337_fbb7_36c2_dbac_d024545cf64a">Janus Henderson Global Sustainable Equity Fund (Class R Shares/JEGRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000225293Member"
      decimals="4"
      id="h_2246_5a56e673_ae25_42d8_8b25_47c018197e4e"
      unitRef="pure">0.3331</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000225293Member"
      decimals="4"
      id="h_2247_3a955f7c_f741_4377_8d26_3d95849fa525"
      unitRef="pure">0.1250</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_14_1956fa98_96a9_01f1_f2ab_e374c76e6c38">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2248_ccc5b55e_79d8_4d31_a623_3d9dce001481"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2249_f9dac6bd_3d0b_4f07_8972_a18cfc65b417"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000225293Member"
      id="t_21_b3287121_f586_b9de_221d_5fd599faafde">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_16_41632551_cf91_187e_4189_286280279fd7">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_17_502d456c_a1f1_2104_ba13_7cd3adb82172">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_18_7ed532e1_b4d0_eae0_3209_4506742dd9a2">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000225293Member"
      decimals="INF"
      id="h_2250_ca5b7634_aaae_461f_9922_3b1bfa0fd1ba"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000225293Member"
      decimals="INF"
      id="h_2251_783ea2cc_5b28_48f0_b16e_415fb0060904"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000225293Member"
      decimals="INF"
      id="h_2252_44935863_d338_4f18_a656_840052223b2c"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000225293Member"
      decimals="4"
      id="h_2253_9db3acb3_0fe8_45b4_a635_c758635eab03"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_19_bfe74c44_f698_de83_c895_d912ede89027">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275379.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000225293Member"
      id="t_20_dbd65cfb_d338_829c_29ab_7b1524e7aa11">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2254_ee7212fa_48b8_4b9e_aac2_4eec52042d3a"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_NVIDIACorpMember"
      decimals="4"
      id="h_2255_d1749c03_1d4b_43b9_a195_a56ea4263d77"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2256_9acd14be_a1ec_4366_b618_8beadc17fa15"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_WabtecCorpMember"
      decimals="4"
      id="h_2257_c0352ada_207d_4efe_81a9_6b594173e465"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2258_6a27e51e_51c5_4878_af73_1489c536b6ef"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_CommonStockMember"
      decimals="4"
      id="h_2259_8238ba99_89e9_4f51_b389_801f78b5ba3e"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2260_501c13db_5fb4_4315_9b20_51b36b562b3c"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000225293Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2261_8bf9e1b1_538c_4c8d_ab33_df205440226f"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219906Member"
      id="t_1_b0b37d6c_a9df_df49_44f6_bc319cd72d21">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219906Member"
      id="t_2_28b76f8b_d1b0_f034_64af_582297afc3ac">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219906Member"
      id="t_3_5a0051a8_0f57_e8ed_350e_5aeefa0e2158">JESSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_4_0124113b_2501_6f83_42ba_716806e732c3">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219906Member"
      id="t_5_36249986_08ca_8f38_f21e_896cc6f785c7">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_6_2a7cd200_0002_7a95_0122_7ff48c89e899">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219906Member"
      id="t_7_8f191da2_313c_528d_21c7_572b6075635d">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219906Member"
      id="t_8_e8d1b031_6316_cc7e_8aa3_ce2471a3bf86">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_9_f85097c5_4285_3bf2_0f8e_980664472102">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class S Shares/JESSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;117&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219906Member"
      decimals="INF"
      id="h_2262_4c7d01e5_90e7_4d0e_8aa9_a7bae640412b"
      unitRef="USD">117</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219906Member"
      decimals="4"
      id="h_2263_b3b6c0af_a861_4c88_8a7f_28ae305545fc"
      unitRef="pure">0.0100</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_21_bbc4c672_1bea_6fff_ee02_2bd22fb9dc84">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class S Shares returned 33.49%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_11_74b9bcbb_4701_987a_6b22_4cd30eeba982">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275408.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_12_b99c7370_d210_a6ad_5a68_98c0d8e681b9">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class S Shares/JESSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219906Member"
      id="t_13_bb0618da_c2ec_393a_28ac_2eb04edc05e7">Janus Henderson Global Sustainable Equity Fund (Class S Shares/JESSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219906Member"
      decimals="4"
      id="h_2264_a61d7955_5d11_40c5_b7b6_68ef754251e3"
      unitRef="pure">0.3349</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219906Member"
      decimals="4"
      id="h_2265_ee11ffc3_82d4_4f70_9667_749b7189663b"
      unitRef="pure">0.1257</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_14_84eb4af9_2e01_4c76_1c4e_f8cd03674625">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2266_78af88a8_02a6_4ebd_be80_79ea526e3885"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2267_44505bff_1bf9_45b3_b45f_9ee8e157e55f"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219906Member"
      id="t_15_aca197a0_49af_fc05_6fc3_b4268d08f604">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_16_e07ebd4e_51f3_54be_2d8b_91e22c33b8ea">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_17_79288251_ad74_0f21_0ce5_21ba236ef568">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_18_2d3d4a36_ae2a_c32f_fad6_c63858504e4d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219906Member"
      decimals="INF"
      id="h_2268_fec48ee6_9a5e_4231_91f3_19963041340b"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219906Member"
      decimals="INF"
      id="h_2269_9fd2c802_81da_4e1c_a345_39a5dfbbec57"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000219906Member"
      decimals="INF"
      id="h_2270_882da66a_9177_468d_8a5a_2fa3f6463899"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219906Member"
      decimals="4"
      id="h_2271_625dfc78_34a4_4ee2_9e72_5a0ce8acec55"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_19_45a184e2_1ca2_5066_e095_02012f2497b5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275418.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219906Member"
      id="t_20_3f7e6ffe_474c_87e0_747b_37bb9a5d73c0">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2272_e090ca50_ab1f_490d_bcef_95c726cb7f8d"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_NVIDIACorpMember"
      decimals="4"
      id="h_2273_fb47a44d_ed0d_43fd_9f20_da44bfebe534"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_SchneiderElectricSEMember"
      decimals="4"
      id="h_2274_e21f0fd2_31de_43b2_a05f_02e2e84b0077"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_WabtecCorpMember"
      decimals="4"
      id="h_2275_8aec9a1e_5d31_43b8_8e3a_2559b45cdb8f"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2276_4c45b3de_8045_4f48_adc1_c12e604d5e7a"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_CommonStockMember"
      decimals="4"
      id="h_2277_9b14b91f_1706_4262_a6d1_d9c4099be004"
      unitRef="pure">0.990</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2278_1f5b1870_d065_44d7_97c7_6c1b8081a507"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219906Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2279_f5fce218_a5f1_413e_afe0_b7abbde5b68e"
      unitRef="pure">-0.005</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000219907Member"
      id="t_1_4c2766b0_4405_9336_163f_fb0dfa246b2b">Janus Henderson Global Sustainable Equity Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000219907Member"
      id="t_2_3d9237ae_23c0_a1ec_5555_dfeb2b7e073b">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000219907Member"
      id="t_3_64f34719_d19b_4d51_8e30_18a16911b30a">JETTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_5_5e5a9fc1_fe1c_9025_59a5_068fee069e9e">This annual shareholder report contains important information about the Janus Henderson Global Sustainable Equity Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000219907Member"
      id="t_4_0f145cec_2ed0_de8b_682e_208bb48ebcf3">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_6_6058fb71_2f52_7809_311c_5dc21d736d16">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000219907Member"
      id="t_7_a0e3764c_2540_e339_0e8f_16fcceca2601">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000219907Member"
      id="t_8_18dff496_a869_20f0_c46e_f1dadb767b1c">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_9_be0c2a20_1071_538d_6139_a1d9cd191c80">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund&lt;br/&gt;(Class T Shares/JETTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;129&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000219907Member"
      decimals="INF"
      id="h_2280_4f509d8a_ea16_453f_ad06_b67805f4c8c7"
      unitRef="USD">129</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000219907Member"
      decimals="4"
      id="h_2281_ea67fc7c_35f3_4a59_ac91_678e59ae2aa0"
      unitRef="pure">0.0111</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_21_bc14985a_2da3_74e7_99f2_f89e6d1bf432">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Sustainable Equity Fund Class T Shares returned 33.30%. Its broad-based benchmark, the MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;, returned 32.43%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Sector allocation contributed to relative performance. A structural underweight in the energy sector and an overweight in the information technology sector were especially positive. Individual stock contributors included semiconductor firm NVIDIA and rail equipment and systems provider Wabtec. NVIDIA posted strong results, and we see the company as well placed to benefit from earnings upgrades. Wabtec also enjoyed strong results and raised its full-year guidance.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stock selection within the healthcare sector detracted relative to the benchmark, due in part to a position in Humana. The healthcare insurer reported increasing hospital utilization trends, which led to concerns about lower margins in the future. Additionally, there was speculation Humana would face a downgrade in its star ratings, which are assigned and published by the Centers for Medicare and Medicaid Services.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;June 25, 2020, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275447.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_12_7547779f_842a_d0ca_4005_c96bb5921173">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Sustainable Equity Fund (Class T Shares/JETTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;33.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI World Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;32.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000219907Member"
      id="t_18_240e3920_7706_228b_0bf3_d574b228cd7e">Janus Henderson Global Sustainable Equity Fund (Class T Shares/JETTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000219907Member"
      decimals="4"
      id="h_2282_56963643_3c29_4eed_8c83_eec013946833"
      unitRef="pure">0.3330</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_C000219907Member"
      decimals="4"
      id="h_2283_a3e012a1_7b6d_4e2c_8ff4_5c5f8c4ab4af"
      unitRef="pure">0.1248</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIWorldIndexSMMember"
      id="t_19_269b634b_4ca7_6515_ab99_2ce140ea1464">MSCI World IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2284_fab456da_6b1b_4030_8806_3adada75e280"
      unitRef="pure">0.3243</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20200625_20240930_MSCIWorldIndexSMMember"
      decimals="4"
      id="h_2285_6f3f23ec_5b8d_4324_a76d_8395bb6f90ac"
      unitRef="pure">0.1495</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000219907Member"
      id="t_13_85c8ab90_78e6_3804_ab69_233f41e087a9">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_14_84487122_6b6d_ef67_3653_9cd14409e7b0">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_15_efa39fb7_908f_3724_1019_9c2ac8f9ec27">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_16_d3809ffe_57e1_1f0f_11e6_6cbcba2ab01d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;36M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;55&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000219907Member"
      decimals="INF"
      id="h_2286_bf8197e8_eeab_4134_842d_f59489e58219"
      unitRef="USD">36000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000219907Member"
      decimals="INF"
      id="h_2287_06578531_a1b4_4389_8767_4aff73d0a20a"
      unitRef="Holding">55</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000219907Member"
      decimals="INF"
      id="h_2288_f8d9d11f_9d5b_4f9e_8fbb_933f366c64e2"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000219907Member"
      decimals="4"
      id="h_2289_a5b2b14d_cfe8_420f_b336_b43ab21dfe27"
      unitRef="pure">0.25</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_17_a1e01111_b711_0cc8_7c18_b78af94379f6">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.5&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275457.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000219907Member"
      id="t_20_4806898e_6d57_075e_cb5a_4d61975c13e1">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Schneider Electric SE&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Wabtec Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Progressive Corp/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_2290_97a5d54b_f55b_458f_b298_c6dfee94c0e6"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219907Member_NVIDIACorpMember"
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      id="h_2291_8435f844_60b9_4391_82ac_bae6c561ec3b"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000219907Member_SchneiderElectricSEMember"
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      id="h_2292_9fc878d6_2ca1_4fee_986b_364a5046c437"
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      id="h_2293_b7d3893e_9a3e_4a32_b8f8_894f6613e494"
      unitRef="pure">0.033</oef:PctOfNav>
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      contextRef="TI20240930_C000219907Member_ProgressiveCorpTheMember"
      decimals="4"
      id="h_2294_ec99755d_a9cd_49a1_b0e6_6c6123a20df2"
      unitRef="pure">0.032</oef:PctOfNav>
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      id="h_2295_1a44e7cd_0c8a_4003_b530_81bcbda710fb"
      unitRef="pure">0.990</oef:PctOfNav>
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      id="h_2296_9db58ebc_7b19_40d2_b734_08608d6ef2b0"
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      id="h_2297_314baab2_8987_456b_82dc_c243159caf40"
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    <oef:FundName
      contextRef="FY2024_C000077655Member"
      id="t_1_f17c1628_aa7b_a7bf_9da3_d03c22bad767">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077655Member"
      id="t_2_bbc1df09_dfd1_0526_0cf8_16dd7a11e7bc">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077655Member"
      id="t_3_72a251c5_2372_a662_82d4_0b33e13713ae">JATAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_5_5667518b_ccca_9951_a67d_fc5015768a9f">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077655Member"
      id="t_4_dd6eab5d_546f_cf5b_eba4_fd3b3a0e8992">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000077655Member"
      id="t_6_fbea5bf7_e6d4_f104_dd1e_f2bc74bcb132">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
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      id="t_8_570a2047_d8b4_75ae_a52f_b7d1e2a185e2">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
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      id="t_7_9dc865aa_0319_a7fd_4e9e_d0675cfb7080">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class A Shares/JATAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;122&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_2298_6274e60d_2be1_459f_8213_0dce37043e51"
      unitRef="USD">122</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077655Member"
      decimals="4"
      id="h_2299_85c466f5_6fc7_4a70_ab32_7a14ba48d344"
      unitRef="pure">0.0098</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_23_f0813859_edda_722f_d232_07a19377a232">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class A Shares returned 48.83%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277085.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_12_cd88f86d_8ead_6610_d3ec_abf9ba4fef8e">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class A Shares/JATAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class A Shares/JATAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;40.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="h_2300_e7a0632f_0272_4bfc_8199_d8e018a1a783"
      unitRef="pure">0.4883</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_2301_95c9c83a_114d_4e3f_bb63_619bb8f968e8"
      unitRef="pure">0.1977</oef:AvgAnnlRtrPct>
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      id="h_2302_36a53b90_564a_4955_95d8_470a1c229a4a"
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    <oef:AvgAnnlRtrPct
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      id="h_2303_78606a48_f126_4402_9422_f54d01f944ff"
      unitRef="pure">0.4028</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2304_57f1a794_f27b_45a1_ba84_aa3de3d475e1"
      unitRef="pure">0.1836</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_2305_4aa8ba0a_89fe_406b_84f1_b78314da938b"
      unitRef="pure">0.1846</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2306_e0d8dc3a_2607_4e4e_a6af_e90573610ec0"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2307_423fa1c6_2a36_4e99_9430_1ae0a3fe82f3"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2308_d82f4dff_c17f_4644_8f75_7bfc98b630a5"
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    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      id="t_21_116a852c_3356_f3df_2aef_52aa9b607bce">MSCI All Country World Information Technology IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2309_634e8e7d_7c4d_40ab_b9e1_641aa7b20349"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2310_3517ce86_d50d_4192_9d3d_c248e8d3d32e"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2311_df21d81e_1a35_4bc3_a967_432524cf1531"
      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077655Member"
      id="t_13_55200b04_b6ec_2241_23e3_fd603c446679">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_14_24ef1c4d_d08d_a019_4af8_e7eb9c94053d">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_15_2d1d7765_9039_268f_5782_95c53035cbba">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077655Member"
      decimals="INF"
      id="h_2312_8588b59d_bee9_4e63_95c2_6a9ab319b83d"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077655Member"
      decimals="INF"
      id="h_2313_4a33b9a8_dc61_49a3_8642_6ae24796a362"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077655Member"
      decimals="INF"
      id="h_2314_3cf1904b_18ba_4c82_90db_1c2a7ee322fc"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077655Member"
      decimals="4"
      id="h_2315_dd924c89_6f7d_4d92_9b7a_b7b1693c8667"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_17_141df91b_dfd5_6c4c_e357_aa73d5ca5b0f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277095.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077655Member"
      id="t_22_c2c0222c_0722_eb60_6e8a_fd0d68ffcdad">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_2316_ad673ff7_ee00_489b_9ae0_76fbedd07d67"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_MicrosoftCorpMember"
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      id="h_2317_8b50f6bc_73dd_413f_a801_08aeb21108d7"
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    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2318_1a43cf27_7659_4808_b145_1b5dc90512b3"
      unitRef="pure">0.061</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_AppleIncMember"
      decimals="4"
      id="h_2319_b27da8d8_b8d1_4989_90e3_b0fbce3e3982"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_2320_0e3dd9aa_e61d_4263_bdfc_c37186665975"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_CommonStockMember"
      decimals="4"
      id="h_2321_c3791857_1979_4683_a2dc_990533d2672c"
      unitRef="pure">0.943</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2322_9f58fc95_b8d5_4ac2_a492_30595977ad22"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2323_4f83d8e0_490d_4643_9ef4_f30242d67f95"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2324_d718b9ae_26b2_4cd0_9512_aa0d014d00f6"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_WarrantsMember"
      decimals="4"
      id="h_2325_a96f80ef_1100_4474_9717_76273534bdbe"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077655Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2326_dc057dab_158e_43b7_b1a0_7dd276ed3ea1"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077656Member"
      id="t_1_9ece0ea5_9393_bf5d_5784_6d87bc646800">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077656Member"
      id="t_2_c2625719_1a5c_347e_5bdc_26b32daeac5b">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077656Member"
      id="t_3_aefdc3e4_8a5a_b8f9_1328_b68ef27be966">JAGCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077656Member"
      id="t_4_c47b6275_29f3_00d2_2f87_44fe53af5485">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077656Member"
      id="t_5_49d10161_1093_d14d_2d3a_c5c855766dcd">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077656Member"
      id="t_6_3ccda2ac_f24e_a7ba_9a95_7ad086272af4">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077656Member"
      id="t_7_ac6fe9fe_b78d_2fa7_da80_e27fccfe9192">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077656Member"
      id="t_8_3b8d2a8e_c408_3647_75b9_f28546c61076">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077656Member"
      id="t_9_b76022a8_63f5_612b_3e34_12d83bd45cdb">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class C Shares/JAGCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;214&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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    <oef:ExpenseRatioPct
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      contextRef="FY2024_C000077656Member"
      id="t_25_7f6b25ce_b3ee_b455_794e_935571a2c74b">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class C Shares returned 47.72%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277124.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class C Shares/JAGCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;47.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class C Shares/JAGCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;46.72&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4772</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_2330_d4d5ae88_63bd_48e7_950a_41621949c3b4"
      unitRef="pure">0.1896</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      id="h_2332_adda50e1_6a89_46a2_986d_89f300f5c3b7"
      unitRef="pure">0.4672</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_2333_ef61fe55_a936_41ab_8670_ca342edff02d"
      unitRef="pure">0.1896</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_2334_5ebf30bb_f46f_4c93_b2ae_c5db971b68ae"
      unitRef="pure">0.1835</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      id="h_2335_b13ad224_ecba_4a91_89af_0e227a25ab09"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
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      id="h_2336_33c782a5_026f_44be_a8a1_9d174f39ec6a"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_2337_87750f67_0e60_4521_a635_4768c77d4a36"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      id="t_22_5fb82d95_3012_6a16_07a9_797365c7b7f2">MSCI All Country World Information Technology IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2338_c56319ad_f0f5_4390_afcf_fdddf3f410e4"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2339_ff7c1d36_f49a_42a8_9f14_d70dedf08b6a"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2340_7b6990d2_d895_440e_b05d_cf890b941450"
      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
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      id="t_13_0f73b71f_3b87_da22_f4ae_a95bbcde50fe">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077656Member"
      id="t_14_33cdb557_8d85_8de6_300b_2e84a4bd16c8">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077656Member"
      id="t_15_0d6fd8ac_0cdf_b184_b433_749623161cc4">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077656Member"
      id="t_16_c94e176c_d799_0537_6765_d302a130aa6b">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077656Member"
      decimals="INF"
      id="h_2341_d6c86f36_ebaa_4926_8a3d_51ed60ac1b21"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077656Member"
      decimals="INF"
      id="h_2342_3f09a321_d408_4cb7_bffe_ab89399348fd"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077656Member"
      decimals="INF"
      id="h_2343_9c48868c_9464_4ed8_8ab9_cd236034c4be"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077656Member"
      decimals="4"
      id="h_2344_60648fc2_ed4b_4bc1_b560_f3d31cbfd4c7"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077656Member"
      id="t_17_8a693207_46d0_eb06_1d1d_ef3dcf61f340">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277134.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077656Member"
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_2345_bb98ec9e_c6c7_4232_9a95_a4f91f34f149"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2346_a766ea04_6774_4d28_9747_e7cdf742bec5"
      unitRef="pure">0.100</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2347_3f5a6070_ff40_44ac_bb86_6b5c264d8bb8"
      unitRef="pure">0.061</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_AppleIncMember"
      decimals="4"
      id="h_2348_6ba822f7_82b6_49cb_af38_c84372ea9187"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_2349_b3579687_a7d3_4f43_8687_42cadd38e066"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_CommonStockMember"
      decimals="4"
      id="h_2350_c05f5907_d213_477a_aea6_3cf69b136611"
      unitRef="pure">0.943</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2351_7b74ac5b_af37_4ebc_a893_a217f0327d35"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2352_4cd7762b_286f_49da_b358_c83ede660a99"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2353_52ef8ca3_3390_4367_82a9_977697ebbc2d"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_WarrantsMember"
      decimals="4"
      id="h_2354_8477c26f_72e3_414b_ba4e_7587259374ef"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077656Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2355_1a96de98_7d0c_4f48_8ac8_dbd9a6d6268a"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000083513Member"
      id="t_1_f0e144c8_6167_9a3f_3633_a4b10616d12d">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083513Member"
      id="t_2_91c13777_3f91_d18e_9468_e3b1d6cc006f">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083513Member"
      id="t_3_0e0806b6_5987_555a_2f22_7a963361abb1">JNGTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_4_336723b2_192f_22dc_e533_ca9d4adc732f">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083513Member"
      id="t_5_f9cc7abb_c770_0b29_962b_fa398681f373">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_6_a3355a7a_4697_f497_1b33_4e8ee881bb91">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083513Member"
      id="t_7_1fee7b20_62d5_46b5_8b40_b0e0185848f5">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083513Member"
      id="t_8_ca8b56b1_07cf_fc9d_4e7d_e19a5ebfe61b">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_9_7ca3a393_e259_1c30_13e9_e4a492870117">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class D Shares/JNGTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083513Member"
      decimals="INF"
      id="h_2356_fc8156f5_16ea_4dd2_be8e_cbecf776c29e"
      unitRef="USD">97</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083513Member"
      decimals="4"
      id="h_2357_68e16ce4_496d_49ae_8984_63745be5ebba"
      unitRef="pure">0.0078</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_24_280a14e6_deef_8d41_7c6b_cce331e07f87">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class D Shares returned 49.09%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277163.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_12_e4ca8434_930c_466e_e76b_6aa6c947a5f4">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class D Shares/JNGTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;49.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083513Member"
      id="t_19_5ddf779f_97bd_c439_e509_6855e420969e">Janus Henderson Global Technology and Innovation Fund (Class D Shares/JNGTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083513Member"
      decimals="4"
      id="h_2358_c4afad7a_7aee_4165_a498_f3412437e3e9"
      unitRef="pure">0.4909</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083513Member"
      decimals="4"
      id="h_2359_cd02b037_bb42_4941_9ba7_97d151f777b0"
      unitRef="pure">0.2000</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000083513Member"
      decimals="4"
      id="h_2360_cb7bf56c_46b3_4ed2_b109_494057875769"
      unitRef="pure">0.1939</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_20_52f7b97a_50c7_c603_fc02_50703b6bef80">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2361_d138c657_6498_4a04_9852_ce834bfc5c14"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2362_1fbaea16_1703_4a39_9021_e613537ec7e9"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2363_659d0494_7c87_4ccd_919d_82f91c8545a2"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      id="t_21_058bf5f6_4f72_8309_d535_3438d6b42fa5">MSCI All Country World Information Technology IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2364_81ccd8c0_eebb_4beb_8282_c01677490151"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2365_684543ed_c555_4d49_805c_e828208a7055"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2366_0a146ef2_e392_42a5_9eea_bfd74ae3e294"
      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083513Member"
      id="t_13_199dd638_f52f_8696_922e_7ad31031c729">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_14_24e82b4e_97b3_0b78_77c6_e3f54bbd54b6">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_15_b8dc1613_b3c4_b758_0382_77aadb5fd02b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_16_066b368b_22de_7e91_0725_5a581f22face">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083513Member"
      decimals="INF"
      id="h_2367_d4aabfc0_5f89_4d90_9538_bee643d55605"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083513Member"
      decimals="INF"
      id="h_2368_c5130112_4937_4b60_b3a4_fb1eee855da2"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083513Member"
      decimals="INF"
      id="h_2369_de496821_d110_44bc_bb64_e8eefcbf5acf"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083513Member"
      decimals="4"
      id="h_2370_e00bba0e_f836_4fcd_80e7_e6ba0d0852da"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_17_cbf89ecd_cd84_9b26_9e0f_abd35a3d1341">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277173.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083513Member"
      id="t_18_c0ff66fd_551f_ccdb_a116_64db17a91878">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_2375_b791f131_ad1d_4f33_8e59_d788d425a122"
      unitRef="pure">0.043</oef:PctOfNav>
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      id="h_2376_82cd4478_c415_41cc_aebf_9bead5f3b8af"
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      id="h_2380_2df24530_81ef_4aad_824a_1ec040fabe03"
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    <oef:FundName
      contextRef="FY2024_C000077657Member"
      id="t_1_27ff48ef_dd44_b24d_0235_3b713ed53dbe">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_29cd5db2_a4a6_efc7_dd47_d18feb65d68c">Class I Shares</oef:ClassName>
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      contextRef="FY2024_C000077657Member"
      id="t_3_e6ca935a_fd47_75e2_1975_8c1fa0899f16">JATIX</dei:TradingSymbol>
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      contextRef="FY2024_C000077657Member"
      id="t_4_bfc38481_7a22_7cb2_4687_2f4f16e95ee6">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2024_C000077657Member"
      id="t_6_55e7d96d_8906_5fd0_4ea6_3b503e3af1e7">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
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      id="t_8_449448a8_bdec_5822_0e5a_1ee65b39452d">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class I Shares/JATIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_2382_a0ee9a55_043a_48b2_84aa_074fac6d7550"
      unitRef="USD">93</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_2383_0cb53057_17f1_4e82_86c5_8834b59ef606"
      unitRef="pure">0.0075</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_24_38b875f1_f4b1_d105_95de_286dc8293b00">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class I Shares returned 49.15%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277202.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_12_26540576_a002_fa74_badc_8751bb21baaf">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class I Shares/JATIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;49.15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.4915</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
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    <oef:AvgAnnlRtrPct
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      id="h_2390_786a9634_95ab_41b8_907a_a9817ca43882"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2391_3ffcf4ed_31b1_4de9_8895_0aa4fa552de0"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
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      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
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Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_14_41d633d4_9aba_58aa_3f4b_7aacb1782046">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_15_aa4514e5_b62a_0108_577a_db7f2b772306">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_16_eddf926b_e6fc_bdb1_ba83_cbbd1b92de1a">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077657Member"
      decimals="INF"
      id="h_2393_7ceb0f11_807b_4e63_a923_ef02b89fa783"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077657Member"
      decimals="INF"
      id="h_2394_e4ce8064_7137_45bb_9a76_c1f393f6242a"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077657Member"
      decimals="INF"
      id="h_2395_a6c5b280_e1cc_46de_a128_939671fc0ba9"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077657Member"
      decimals="4"
      id="h_2396_5fea914e_8af7_44ca_aac9_abfa8107e8dd"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_17_f02f3666_4175_22c4_87a6_dd0435a3da52">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277212.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077657Member"
      id="t_18_6cd80b57_fd30_96d9_3683_e2f34761562c">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_NVIDIACorpMember"
      decimals="4"
      id="h_2397_12695ec1_44a3_4b15_a1d0_9a014a069be4"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2398_9afa1bab_238d_487e_836c_d75e78da7f3f"
      unitRef="pure">0.100</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2399_0b866a7b_ba12_4145_9f77_dc4d254b0807"
      unitRef="pure">0.061</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_AppleIncMember"
      decimals="4"
      id="h_2400_df975f0c_f649_4431_b35b_b4ce98ae97e5"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_2401_0cad1d56_e426_4237_8536_07f68e7b59c3"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_CommonStockMember"
      decimals="4"
      id="h_2402_8d555cf0_fa78_4337_8e0a_57f6b46f3048"
      unitRef="pure">0.943</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2403_eba08edd_31c5_4431_aa6a_659caad010cf"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2404_4420685a_8ea0_4681_9ae5_bd66313cd9a8"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2405_77784e11_4a0e_4205_b2ce_38910e3abfba"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_WarrantsMember"
      decimals="4"
      id="h_2406_21d21a2f_6f52_44f7_b193_90a0d13a3fe7"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077657Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2407_519783e0_5831_43e8_8a14_d1ddfccf2eb3"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000177052Member"
      id="t_1_30239947_7b4e_788b_bb48_880701b7913a">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_c33f7402_e69a_01e6_fb63_215e61c330e7">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000177052Member"
      id="t_3_b173045d_d5d6_e814_376f_fc6536c65504">JATNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_4_dfd3826e_75a2_e12f_0dd4_73958812e636">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000177052Member"
      id="t_5_22fda70e_4c1b_8187_783c_3cb8f3690ae6">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_6_48aeefd7_0c14_8e50_bbcd_93594149943c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000177052Member"
      id="t_7_0554ca8a_035a_f56f_a691_2bfa3281de7e">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000177052Member"
      id="t_8_fdbf6b0a_da57_1027_2a18_ba060effbb31">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_9_a5936afc_0fbe_bc53_4b89_f5406261cac9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class N Shares/JATNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;82&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_2408_eaf3930c_574c_486d_994e_68f0803165d8"
      unitRef="USD">82</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000177052Member"
      decimals="4"
      id="h_2409_62e24daa_f757_4ddb_ba15_f92f08da8f58"
      unitRef="pure">0.0066</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_23_96da5b76_aded_bc50_597f_a74a902da85e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class N Shares returned 49.28%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277241.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_11_c4f6c080_72ce_bee0_f0fb_dd918b5712a3">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class N Shares/JATNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;49.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000177052Member"
      id="t_12_96c1ec4c_4ac8_697a_0687_22e5ea57f282">Janus Henderson Global Technology and Innovation Fund (Class N Shares/JATNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000177052Member"
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      id="h_2410_d4b52e35_cc3d_4cf1_b14f_26b736503285"
      unitRef="pure">0.4928</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000177052Member"
      decimals="4"
      id="h_2411_3f87c4b8_e9ba_472f_be61_a6867557713b"
      unitRef="pure">0.2015</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000177052Member"
      decimals="4"
      id="h_2412_c2eb8c49_58e1_4dc2_9c96_47599267b18a"
      unitRef="pure">0.1950</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_13_2991773f_45a7_1ac9_e368_c5b8e87a9aa8">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2413_c6dbec15_9743_4ec9_a3af_13fe7ff84366"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2414_8f43f7df_1993_46a0_baca_ee6e4d4ffaa3"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2415_8a27bd5d_fdc9_494d_9926_b5650ade31d7"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      id="t_14_ba269600_a0f8_b0d4_c8d4_0051ec80a23c">MSCI All Country World Information Technology IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2416_9db4a143_01fa_40b5_95aa_4ef6e80a407b"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2417_524e572b_61c2_4959_b635_d4e1cba660dc"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2418_bde1d688_2e85_47f9_ada2_872e6fd15542"
      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000177052Member"
      id="t_15_9c496668_a185_e11f_8b26_d4c0ecc2e39a">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_16_15e89300_0d72_cbe0_9b21_b0b288c55f51">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_17_a06da185_322c_08d4_473a_5339b9418561">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_18_2ca421cc_75f1_9bab_9b64_3a743201d8a6">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000177052Member"
      decimals="INF"
      id="h_2419_27f734a5_8071_4f1b_a0cf_cb6309209c3c"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000177052Member"
      decimals="INF"
      id="h_2420_f2d9121f_8147_4478_80aa_6e53a34ea7bf"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000177052Member"
      decimals="INF"
      id="h_2421_bad7033e_4935_4050_9bca_1d80ee659622"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000177052Member"
      decimals="4"
      id="h_2422_b505d112_7871_4696_a362_265d48b02d85"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_19_24f68082_8beb_572a_c613_01bd1f7e1e0a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277251.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000177052Member"
      id="t_20_0341978b_8efb_cc0a_22ba_2090b877fc7a">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_NVIDIACorpMember"
      decimals="4"
      id="h_2423_67bf5354_65c4_4680_a2af_c36868614f04"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2424_6668d743_34b4_41bc_9b29_81f60ecfef67"
      unitRef="pure">0.100</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2425_fbdc43ee_d2b9_43f0_b2f7_77c39067cbc0"
      unitRef="pure">0.061</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_AppleIncMember"
      decimals="4"
      id="h_2426_0a1d8a8d_bcbb_4907_b2c9_9bf66468aa94"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_2427_bd896f4f_9cb8_45c6_a96c_0d3cafa10dd6"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_CommonStockMember"
      decimals="4"
      id="h_2428_26ca74c6_0af0_421b_b645_7912abf0800f"
      unitRef="pure">0.943</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2429_8f67708d_0e72_4a85_bc88_471654b90a4e"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2430_8d8938e6_6dc7_40ee_9bea_b3f167cbcdf3"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2431_8fa629b2_752d_47f9_949d_b7fb41f3ebe9"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_WarrantsMember"
      decimals="4"
      id="h_2432_015fcaa6_173d_422f_b08d_1d5e8dc78382"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177052Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2433_af4ff834_5921_4386_853c_d1753e9d3b54"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077658Member"
      id="t_1_e15de90e_a519_f663_9004_11f04ba9fbfc">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077658Member"
      id="t_2_fcb9d67f_f472_d40b_2347_14b501349d89">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077658Member"
      id="t_3_d282cc3f_a939_8a54_bed9_eb26895cb89a">JATSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_4_edc7a102_c8f4_ce2d_3bb3_6e1d3deb68bc">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077658Member"
      id="t_5_8dfe62b2_aab7_7599_648a_1929d160acc5">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_6_78c05d44_9198_4b4c_2a7e_ecc28a3efce9">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077658Member"
      id="t_7_ef024e3f_b376_c1a4_0bc5_1aa87649ac72">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077658Member"
      id="t_8_dde34710_d888_f0fa_97ce_bbb997d63d58">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_9_0086e26e_61a4_8fbc_087e_50ec7c14d1da">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class S Shares/JATSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;145&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077658Member"
      decimals="INF"
      id="h_2434_b2c83e2f_c4f8_4e3c_b5b7_a7bd0ec08841"
      unitRef="USD">145</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077658Member"
      decimals="4"
      id="h_2435_19670ce7_d585_447d_9afc_3201ef9b4df5"
      unitRef="pure">0.0117</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_24_6b5b6842_8fbb_9852_2059_55785b49d46e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class S Shares returned 48.54%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_23_543bf316_0a2d_96a0_242f_af9094677cf2">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277280.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_12_6e2426fe_f967_1385_60e8_c065af02d925">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class S Shares/JATSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;18.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077658Member"
      id="t_18_7c9fc041_090f_a2f2_c0cb_d16ab222ea03">Janus Henderson Global Technology and Innovation Fund (Class S Shares/JATSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077658Member"
      decimals="4"
      id="h_2436_cc2e4831_e40c_470b_ac58_8d2d1309a7c0"
      unitRef="pure">0.4854</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077658Member"
      decimals="4"
      id="h_2437_2378f952_3f92_4366_b702_b9d8eb8b7f2b"
      unitRef="pure">0.1955</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077658Member"
      decimals="4"
      id="h_2438_7e8e7b91_804c_457c_9ba9_0208560553d4"
      unitRef="pure">0.1897</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_19_bf0b9045_e077_2467_4a36_4d6d5ee6cc61">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2439_f5cdf165_9f0a_4023_bba4_6cec931603f0"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2440_3dce20ee_e313_4ea1_948c_523985af713d"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2441_5c25b6d6_1d78_47aa_85c4_ddd7fbbc853a"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      id="t_20_b32ad201_0959_e211_cfd0_d6046beefe68">MSCI All Country World Information Technology IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2442_5b93465a_3e72_4bc0_a0cf_b54ec61ec1df"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2443_d79d0cca_aad1_46cf_939c_eaafc26d2d55"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2444_0c13fef2_e89d_4a8b_9c52_9b940e38e239"
      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077658Member"
      id="t_13_175a9de0_ffa2_a270_e2b1_f122c0c6c4e0">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_14_f1eb887a_db5e_20dc_e528_25a2f838cdfd">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_15_842f1e7b_c13a_c475_44a3_378bbff8e865">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_16_b4b2e11e_c37c_22c1_6df9_d8e85ade6d5a">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077658Member"
      decimals="INF"
      id="h_2445_af62b7d6_c14e_4c86_9c52_449aa75e6c96"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077658Member"
      decimals="INF"
      id="h_2446_20ceec8d_66a7_41c0_8f05_271a3e3146c1"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077658Member"
      decimals="INF"
      id="h_2447_60891f8a_8901_473a_bfba_8075a922257f"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077658Member"
      decimals="4"
      id="h_2448_1b2a3318_8e8f_4efb_a590_5326fc60ca52"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_17_22dee39f_8b2d_beb0_7a1e_c346e036a73f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277290.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077658Member"
      id="t_21_bfe94c4c_3c57_3b9b_fd86_9387dcceea8d">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077658Member_NVIDIACorpMember"
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      id="h_2449_5e27666a_5cb8_4c76_851d_c62482d86787"
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    <oef:FundName
      contextRef="FY2024_C000028919Member"
      id="t_1_711053c5_f2a0_1cf4_4ec3_2f5439cd2136">Janus Henderson Global Technology and Innovation Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028919Member"
      id="t_2_eb20b744_dec1_8fc2_a318_b9ccc9751320">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028919Member"
      id="t_3_39f397b0_d94b_8de6_ef01_743dedb9837a">JAGTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_4_4aa0dc45_680a_7259_4161_af49f24d94fc">This annual shareholder report contains important information about the Janus Henderson Global Technology and Innovation Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028919Member"
      id="t_5_c284101e_2c87_1be8_039f_d311ef4b224b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_6_ead092d0_e4b4_d655_185f_2438907546fb">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028919Member"
      id="t_7_dfa13b81_945b_4d9f_80d9_047f415c721f">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028919Member"
      id="t_8_0abb95ef_ecfd_4a35_0fc5_9c3c1cfca4d1">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_9_2c5b1449_8b2c_1dcd_d24d_dff1e1003065">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund&lt;br/&gt;(Class T Shares/JAGTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;112&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028919Member"
      decimals="INF"
      id="h_2460_089dddd1_d605_40e4_8a06_9e54662831bd"
      unitRef="USD">112</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028919Member"
      decimals="4"
      id="h_2461_c984906e_89b7_416c_9e1f_f5f468f975da"
      unitRef="pure">0.0090</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_24_6ddaf444_37f2_281a_a898_330f651cb7c1">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Global Technology and Innovation Fund Class T Shares returned 48.94%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%. Its additional benchmark, the MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;, returned 48.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Positioning in Apple contributed to returns relative to the additional benchmark; the slower pace of iPhones sales pressured the stock, and our underweight allocation proved beneficial. The Fund&#x2019;s out-of-benchmark investment in social media company Meta Platforms also contributed. Shares rose on the company&#x2019;s strong earnings performance and excitement around its artificial intelligence initiatives.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Cloud services provider CCC Intelligence Solutions detracted relative to the additional benchmark as shares declined on concerns over stock sales by a large investor. The Fund also held underweight positions in several mega-cap technology stocks, such as graphic chipmaker NVIDIA, that outperformed the market due to excitement around artificial intelligence. This positioning dampened relative performance.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_277319.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_12_d2f1f674_5899_e8bf_cc9e_a56e855a48f0">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Global Technology and Innovation Fund (Class T Shares/JAGTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World Information Technology Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;48.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028919Member"
      id="t_19_2d225bd3_c020_92c0_caa8_2d202dc9e3af">Janus Henderson Global Technology and Innovation Fund (Class T Shares/JAGTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028919Member"
      decimals="4"
      id="h_2462_c92b9b50_b860_4bd8_9213_9db0c664468e"
      unitRef="pure">0.4894</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028919Member"
      decimals="4"
      id="h_2463_abba07ad_bd31_4ad6_95e0_7b7d38ede75c"
      unitRef="pure">0.1987</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028919Member"
      decimals="4"
      id="h_2464_360b7d1f_5c82_4afa_bc22_f3a247cc73a3"
      unitRef="pure">0.1929</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_20_501c5ce3_8aff_7fec_9e33_5571143381f4">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2465_e2ddcf47_cf58_45c1_aa6c_c01374ae201a"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2466_384e8973_8cc7_4165_a46b_9e664f7449b4"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2467_361c32b6_5370_487e_bb8f_bbbb91576e64"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      id="t_21_b6deb4be_ec92_75f0_7cde_f6d897eb51ff">MSCI All Country World Information Technology IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2468_b04e495f_e22b_48fb_aa2e_abc98f58bad4"
      unitRef="pure">0.4835</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2469_178e6b40_b26a_4e96_a844_b00f6c3fc638"
      unitRef="pure">0.2278</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldInformationTechnologyIndexSMMember"
      decimals="4"
      id="h_2470_c86d33cc_0b75_449f_8f44_d27565561251"
      unitRef="pure">0.1912</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028919Member"
      id="t_13_d60c18d5_a00e_127b_e606_73f922d492e8">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_14_2542f4b6_9199_30dd_1bfc_752c3341a702">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_15_8f5ea061_3772_f63d_0c44_144a0add12aa">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_16_3366e692_3a64_b054_f068_d89300b41dc5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,230M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;72&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;40.3M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028919Member"
      decimals="INF"
      id="h_2471_5a12b271_4c3a_4be7_86b9_b0c1ea3c7a3a"
      unitRef="USD">7230000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028919Member"
      decimals="INF"
      id="h_2472_40a2c20b_1603_49bb_bd48_76ebfe75416f"
      unitRef="Holding">72</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028919Member"
      decimals="INF"
      id="h_2473_ea53a969_f409_4b2c_b4f3_828378011c99"
      unitRef="USD">40300000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028919Member"
      decimals="4"
      id="h_2474_5a763510_d58b_4819_bd5a_ee74798312f8"
      unitRef="pure">0.30</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_17_2d513ac6_bc6f_291a_cfd3_f4d34e9449e6">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;94.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;4.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_277329.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028919Member"
      id="t_18_9cc38720_1a89_d0d1_48c4_7fbb1ae20882">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;10.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;ASML Holding NV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.3&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_NVIDIACorpMember"
      decimals="4"
      id="h_2475_79f8f15e_3c54_4953_bcfc_385ca7dfdc47"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2476_084a4e40_16d1_4650_b9a4_4a9fb1971b6f"
      unitRef="pure">0.100</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2477_4ddacb42_bab0_4ff1_86cc_f18ac3e3197a"
      unitRef="pure">0.061</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_AppleIncMember"
      decimals="4"
      id="h_2478_a7873dfd_da81_4251_b685_dfa5e59fc913"
      unitRef="pure">0.055</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_ASMLHoldingNVMember"
      decimals="4"
      id="h_2479_e1801269_3901_48fc_a69a_cbb51d389869"
      unitRef="pure">0.043</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_CommonStockMember"
      decimals="4"
      id="h_2480_1bac3463_e437_4157_9682_2056aeaad587"
      unitRef="pure">0.943</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2481_b3ab83a8_cf8d_46c4_a47f_64a217556f40"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2482_10dd9736_d00a_4c65_8c8a_86baa612e242"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2483_44a75682_7003_4f4f_b136_53096cdcc1d7"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_WarrantsMember"
      decimals="4"
      id="h_2484_e9456f88_8032_4db9_a853_5a55c963163f"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028919Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2485_def62330_ee87_4b9b_aab3_e00806d64c6d"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077659Member"
      id="t_1_f4791628_cdeb_60a4_29bb_7f2e7e03608f">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077659Member"
      id="t_2_953f2e68_8d49_0b8e_9d12_ea8bd5578879">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077659Member"
      id="t_3_2955bd70_6a26_d22d_6765_89cd249b1bf6">JDNAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_5_d7ffe4bc_2808_1c89_daaa_dc9cfa1b4871">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077659Member"
      id="t_4_4f286414_da5b_fe67_47c2_46a5bfcfd342">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_6_0e6e4c36_754e_556e_6845_a8d824eded25">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077659Member"
      id="t_7_e798cbab_c417_0595_0ddd_4b92ab6e1c37">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077659Member"
      id="t_8_1806732d_4a5a_9384_ef4c_0d9e5163dd54">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_9_983f2ece_7999_5ca7_ff55_e07f0ebd7d14">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_25_18cc8df1_861b_22f9_9630_eabf38c27b81">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class A Shares/JDNAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;112&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077659Member"
      decimals="INF"
      id="h_2486_317908ba_31c3_4a6e_9bb6_7073782c8531"
      unitRef="USD">112</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077659Member"
      decimals="4"
      id="h_2487_4799d5a4_76c3_495e_b028_9d1ab46100af"
      unitRef="pure">0.0099</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_28_1dfa2a1b_b4fe_fd76_e6bc_0c5224281ecd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class A Shares returned 26.90%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276188.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_12_ff1e2b6c_d3ad_bdc5_e245_d467993c3059">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class A Shares/JDNAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class A Shares/JDNAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077659Member_WithoutSalesLoadMember"
      id="t_22_ad03e531_8ba7_8de5_c429_4264e72e52f7">Janus Henderson Growth and Income Fund (Class A Shares/JDNAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077659Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2488_169072dc_557d_426c_baf1_4607fd61a010"
      unitRef="pure">0.2690</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077659Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2489_8a0d5360_9062_4907_8c45_5471c49cf166"
      unitRef="pure">0.1183</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077659Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2490_a037bd67_361b_4bbb_a691_6cad11f26370"
      unitRef="pure">0.1161</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077659Member"
      id="t_23_df32898f_39ba_791d_5bec_766cc5eb55f2">Janus Henderson Growth and Income Fund (Class A Shares/JDNAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077659Member"
      decimals="4"
      id="h_2491_0a723ff2_fa54_4872_97b0_0b93f611efac"
      unitRef="pure">0.1960</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077659Member"
      decimals="4"
      id="h_2492_851871b4_5fb4_4f97_95f0_634aa832c2cf"
      unitRef="pure">0.1052</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077659Member"
      decimals="4"
      id="h_2493_fbca8f13_bb2a_4f9c_9204_8001102df5bb"
      unitRef="pure">0.1095</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_24_887da1cd_cc0a_ec76_8846_8c228afed271">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2494_0739bdbd_5f89_4f28_869c_0760e008363d"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2495_31b84428_7a5e_4933_8522_c643c6bfc516"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2496_765b61ff_b2ef_450f_8d51_6df83fe42dc6"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077659Member"
      id="t_13_ffc21f40_0fd6_e0aa_840d_cec1f4c1e322">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_14_4188f3f1_1555_d96f_9151_958c2c2be542">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_15_2c831800_1b09_b5be_e00e_84bd7655ee48">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000077659Member"
      id="t_16_87c1f207_00ef_7cac_81ef_8dff227d4712">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077659Member"
      decimals="INF"
      id="h_2497_e5517c31_680b_4414_b7fa_3fea38880581"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077659Member"
      decimals="INF"
      id="h_2498_7d6f777a_026c_48e7_b6b6_a67a3694061a"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077659Member"
      decimals="INF"
      id="h_2499_d8dfb752_144f_4297_bd60_cd85af485884"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077659Member"
      decimals="4"
      id="h_2500_b23dfa97_ad4a_4d76_a888_0c6eb71f963b"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_18_43a1ef4b_0cb5_d35d_9649_9485a63a7385">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276198.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_17_6faf4d94_3615_485f_4aba_edf405830e92">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2501_e948ca6b_55d4_4950_a975_32200017d3fe"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_AppleIncMember"
      decimals="4"
      id="h_2502_59813c4f_1b21_4e27_8503_948140ba8def"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_KLACorpMember"
      decimals="4"
      id="h_2503_457f7c85_1bb6_4709_954a_9b9a3593eca2"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2504_3546f376_fecb_40a1_8249_602e6d2aa61f"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2505_ac70e750_53f1_46b0_9aa6_b6d697831e99"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_CommonStockMember"
      decimals="4"
      id="h_2506_48ba12cd_d2ad_43f5_8be9_6547e544503b"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2507_889ee634_1144_44be_a3c0_ab204b5918ec"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077659Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2508_7c065a87_8064_4dcc_8fbc_267c5c6bcc5c"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_19_61030a72_9b5e_3235_076d_9fdbbbf0cd63">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077659Member"
      id="t_20_8650eef1_38ae_7c66_f12a_11cf722a7f5c">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000077659Member"
      id="t_21_6887907f_c0e8_881a_661d_d267944a7609">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000077660Member"
      id="t_1_be268fe2_481a_de86_5837_700d79c72e0b">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077660Member"
      id="t_2_6db098aa_fdf8_eebf_e2ae_065eed6ee883">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077660Member"
      id="t_3_3df9c7c0_c227_116f_03f7_294d493b8171">JGICX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_4_474256d4_0459_87ea_02fa_2105e28b0c4c">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077660Member"
      id="t_6_134f4532_2478_e8fc_e3d8_86124df04c93">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_5_d3106b43_e6f8_4765_1362_60258b9e9fec">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077660Member"
      id="t_7_601409f3_ac78_2a16_284a_c0dbff24dce6">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077660Member"
      id="t_8_eaf51ca9_2d07_b736_af71_b24f03863b40">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_9_98029ad5_bcb3_f444_f7da_248342de39f9">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_27_22443c4f_bd74_627c_440a_9e67a8614991">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class C Shares/JGICX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;184&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077660Member"
      decimals="INF"
      id="h_2509_cc671923_f965_40c5_9379_4790758cb933"
      unitRef="USD">184</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077660Member"
      decimals="4"
      id="h_2510_9f77e176_21d2_483f_9b7b_a9fbf61e4266"
      unitRef="pure">0.0163</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_30_ca057ca5_086e_7c07_e68b_bf28bb9fa339">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class C Shares returned 26.08%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_29_8589b441_165d_f320_69a9_7d15de7fccfd">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276227.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_13_b3ce448b_c343_de28_b91f_ee646079ad54">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class C Shares/JGICX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class C Shares/JGICX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.08&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077660Member_WithoutSalesLoadMember"
      id="t_22_45ec17d2_bd8b_d2eb_e19e_4685800f80b7">Janus Henderson Growth and Income Fund (Class C Shares/JGICX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077660Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2511_bd162494_1be5_49a3_bcae_c08f71408fd8"
      unitRef="pure">0.2608</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077660Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2512_c2a36e8d_bc15_4389_8264_887d17592c33"
      unitRef="pure">0.1113</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077660Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2513_0c5d4cf8_d9e4_4558_adac_f0914c5e8d66"
      unitRef="pure">0.1084</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077660Member"
      id="t_23_da06af18_b132_99e5_6a90_a70c16258f5a">Janus Henderson Growth and Income Fund (Class C Shares/JGICX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077660Member"
      decimals="4"
      id="h_2514_3439578f_2f59_46f4_8333_9a923434b480"
      unitRef="pure">0.2508</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077660Member"
      decimals="4"
      id="h_2515_f31425bd_7381_474a_a95e_0626f43f70d5"
      unitRef="pure">0.1113</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077660Member"
      decimals="4"
      id="h_2516_5355ffa6_d871_4398_9912_ead251dcd792"
      unitRef="pure">0.1084</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_24_344e5308_2b09_cd86_55d1_d76a18c07f28">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2517_83609575_89c4_406e_ad28_0312f7aac375"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2518_708a7244_e60d_465a_b9e8_2d337e50af9f"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2519_791bde53_2546_4249_a0a9_75bcb5c71e20"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077660Member"
      id="t_14_4acf92ab_d7b1_9afd_019c_16e1713716a5">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_15_9b888c7f_72c1_d148_d59d_02ea835948e4">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_16_34886eba_9bc7_82b4_d48c_eea2856dde26">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_17_ec0c83a7_62d9_c884_b8d4_f7a00b8c60a4">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077660Member"
      decimals="INF"
      id="h_2520_5e8796f0_f6ac_4b5a_8247_0f85a85a88fd"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077660Member"
      decimals="INF"
      id="h_2521_6f1ab0e5_d22c_4581_8fb1_dca4203f188e"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077660Member"
      decimals="INF"
      id="h_2522_5c9d758c_a373_410b_8fe9_14a1b41c0c10"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077660Member"
      decimals="4"
      id="h_2523_d4a0ca6c_51fc_424a_95a4_402f3b4a0099"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_18_63c204ef_3adb_4f5b_472f_2120b1c863fa">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276237.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_21_5acb7f38_ab38_5d62_d599_442fd5e00bd0">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2524_5808ec67_8fba_4ed4_9b8d_b8e7b382928a"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_AppleIncMember"
      decimals="4"
      id="h_2525_aac4cb39_7caa_4ffb_af85_a0d319ca8e52"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_KLACorpMember"
      decimals="4"
      id="h_2526_dfcde3d8_3d94_4cb9_823c_3e38a36fc5ff"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2527_61680aab_3d11_4cf5_bb20_f5f7c7ed33cd"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2528_e325ac7b_8755_4a63_ab8a_fb8b46efe32d"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_CommonStockMember"
      decimals="4"
      id="h_2529_6b8f0c95_bd9f_454e_9993_4d6955e6dc29"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2530_576f70ee_b11a_4079_a4c2_68ab8082624d"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077660Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2531_fb0954a0_a5e7_45c5_941b_76a3b569ab17"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_19_4dadcb26_eafc_f61f_773d_6daa4e0ae777">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077660Member"
      id="t_26_0ea7c0ef_472a_05be_c17e_03b9cac1333d">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000077660Member"
      id="t_25_355ac3cf_0e43_82cd_d819_2877b6a82718">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000083515Member"
      id="t_1_babed5b2_6334_d48f_ab7e_418c13850c14">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083515Member"
      id="t_2_c747dbe6_80cf_7404_fedf_3d91f74d8a89">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083515Member"
      id="t_3_9740ca55_45c7_07cd_4a4b_1c6d8c78d21c">JNGIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_4_a79cf2f0_36d2_b2e5_ed29_e7917019f80b">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083515Member"
      id="t_5_fbf6f378_e135_d43b_22a6_c3648360884e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_6_948fcd80_46b3_3734_5a3b_de754fe2160d">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083515Member"
      id="t_7_9888d120_5fba_4c5f_9f97_e884dfb3a629">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083515Member"
      id="t_8_4e75c41f_d915_c60e_9da2_2d0e22f0787b">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_9_227af5ea_d80c_019f_fa82_72a85ee1cc03">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_10_c8ad95a1_55e1_e3f2_2864_4da34b039fda">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class D Shares/JNGIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;84&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083515Member"
      decimals="INF"
      id="h_2532_2a68f77d_72dc_4efc_b178_e04b0e0fada1"
      unitRef="USD">84</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083515Member"
      decimals="4"
      id="h_2533_e5e26597_c1bc_494c_b9e4_7907087bcfe0"
      unitRef="pure">0.0074</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_27_2286491c_79bd_1770_0100_c40bca59a99f">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class D Shares returned 27.20%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000083515Member"
      id="t_26_92d01493_3cbd_7992_41c9_f01b8cd7ccdc">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276266.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_13_9087a02b_f0a6_9727_df30_12ac83cbea54">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class D Shares/JNGIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083515Member"
      id="t_21_d900ac2f_cff6_5830_367f_821cea3f55de">Janus Henderson Growth and Income Fund (Class D Shares/JNGIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083515Member"
      decimals="4"
      id="h_2534_d3ebabba_e1c5_4ca2_89d1_ae63b211db9d"
      unitRef="pure">0.2720</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083515Member"
      decimals="4"
      id="h_2535_5d6041f7_5a8c_4ca7_bf50_7dacc5794a0f"
      unitRef="pure">0.1212</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000083515Member"
      decimals="4"
      id="h_2536_87fac128_6032_4633_b10c_7cde515f00de"
      unitRef="pure">0.1184</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_22_3831dec1_f782_1c6b_9938_94fb9d1af7af">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2537_8322376d_b01f_4a22_837d_85a8a3c343e0"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2538_25d64380_a70c_42d1_8b15_75e61bb36d3f"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2539_0673469e_f53d_43b3_bd0b_b109c71d90d2"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083515Member"
      id="t_14_b841541c_4849_8140_68ee_0ec0748c6e15">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_15_823761b0_83da_5895_825e_ea6977336407">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_16_fa3a558e_ebfb_ea29_0b63_7606b6bf0a02">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_17_fd5aa438_2e40_6397_4464_c8dfe1fad92e">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083515Member"
      decimals="INF"
      id="h_2540_6474f9ad_91a3_4a29_842c_e9e64bfffec8"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083515Member"
      decimals="INF"
      id="h_2541_5230c53f_00ab_420c_9f0f_67360d0a02e1"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083515Member"
      decimals="INF"
      id="h_2542_cd3a0b3a_0402_4228_b368_b11d60281d22"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083515Member"
      decimals="4"
      id="h_2543_700ddd43_94a3_4f2d_9e59_755dbebd5272"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_18_bebe2a87_0202_0f2d_e8b0_68d83377ff4d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276276.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_23_70928c54_d1ba_3184_71e4_efac590a3799">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2544_b1c026c8_6264_4815_90ee_e91074352e14"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_AppleIncMember"
      decimals="4"
      id="h_2545_2f2ebbb4_cd17_4a23_860e_0f2f8530ce7f"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_KLACorpMember"
      decimals="4"
      id="h_2546_8458e59e_955a_4240_851f_1cdf10c411bf"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2547_373ee4ef_e4e7_48de_b2a4_89981d5416ec"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2548_75767ece_666a_4b2c_a0b7_bc75c92e9968"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_CommonStockMember"
      decimals="4"
      id="h_2549_62105256_3983_4872_a253_0b841a98afe2"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2550_077ac92b_7ff6_4483_af63_72f1f9df7ce9"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083515Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2551_82832a13_fc11_48b3_a7f6_bd05ed8ecfe9"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_19_69a2813d_8faf_dc76_5d1c_82475bf5f756">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000083515Member"
      id="t_24_07b4dd29_025e_008b_d5a3_a05f59a0ad8a">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000083515Member"
      id="t_20_c068ef9c_4196_376f_03ed_8c197e9d65d0">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000077661Member"
      id="t_1_8ec234f0_8653_12ae_a53c_9d54146e0d9e">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077661Member"
      id="t_3_6156edd2_fc31_8a69_f985_a0b5c7df973a">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077661Member"
      id="t_2_b1baf75c_6a62_cfa0_922d_31a11f2b8d2e">JGINX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_5_b8e7e789_98a7_9ad0_6f66_b94f61c4668a">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077661Member"
      id="t_4_ae1f2bcd_3f81_01a3_a6ec_dfa8ca6421b0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_6_d0b9ccc4_37bd_d4ee_3071_d19b96fef6da">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077661Member"
      id="t_7_e80492ba_945d_6345_ed65_ee530302a04f">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077661Member"
      id="t_8_0d7a5354_f657_d3cc_dc57_89ef85bbd55a">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_9_f9ef3668_02b9_930d_3cf8_5a610df5e955">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_10_a8719cae_0af6_a4b3_e03c_7ba3a2d67451">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class I Shares/JGINX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;80&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077661Member"
      decimals="INF"
      id="h_2552_57ae7c2f_3f34_44e8_8650_db62d8db3438"
      unitRef="USD">80</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077661Member"
      decimals="4"
      id="h_2553_41ae47f9_dc7f_421c_92b4_5113413f23c6"
      unitRef="pure">0.0070</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_27_9bc10485_b302_6e5e_dd04_e880ff9acf83">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class I Shares returned 27.27%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_26_c7266cce_81fb_c035_0996_bc11e23c0fe0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276305.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_13_bee3cfba_853d_aa02_a82e_d036469e597f">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class I Shares/JGINX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077661Member"
      id="t_22_37595c7b_d8e3_f037_e7c5_ca2a1d621b70">Janus Henderson Growth and Income Fund (Class I Shares/JGINX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077661Member"
      decimals="4"
      id="h_2554_e03fb116_ee9f_4a02_b5ac_c002632dc132"
      unitRef="pure">0.2727</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077661Member"
      decimals="4"
      id="h_2555_0a922106_2557_4666_b42a_19523bcfa813"
      unitRef="pure">0.1217</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077661Member"
      decimals="4"
      id="h_2556_b838fcd0_e040_4b8f_99b7_ceb0e623cd24"
      unitRef="pure">0.1191</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_24_6f0611d6_49f9_e86e_b28b_eacbc7319eb6">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2557_39fd7b55_4646_4a3d_bb3c_dd9684e23455"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2558_34262cb9_27fe_4859_83ba_02eefdfdd37c"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2559_d8a9703c_0fd5_4b0f_b670_49f5e6293dd4"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077661Member"
      id="t_14_cdf9014e_a4e5_8c0c_6089_cc450f0e4c2f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_15_0a226a98_ee34_cec2_66bd_1aea5616e6ac">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_16_d5219691_c304_a962_e4e1_f0024a82295b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_17_dabe00db_9bd5_0bbf_67f0_6010f70fa098">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077661Member"
      decimals="INF"
      id="h_2560_f5f03dc4_cda7_481e_9f5a_86b14307a138"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077661Member"
      decimals="INF"
      id="h_2561_a96e3123_3616_47a2_91eb_abe81c863d45"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077661Member"
      decimals="INF"
      id="h_2562_2e0ca7e3_9d59_4040_889f_84799e51ac9c"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077661Member"
      decimals="4"
      id="h_2563_65406856_adaf_46b0_bf0e_8bd6f1976f47"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_18_71a933b7_051d_712d_3e26_7dfacc671e9d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276315.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_19_99be122c_e372_df50_31b7_cc904fe67805">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2564_0416507c_bd95_40dc_adb5_aa24b3b45995"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_AppleIncMember"
      decimals="4"
      id="h_2565_1e62f150_7de7_4adc_a8df_90fd57ed5ff4"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_KLACorpMember"
      decimals="4"
      id="h_2566_6355ed60_6a21_4b03_bbb1_5e6dd0f1098f"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2567_c07f6e67_098d_46ac_b1e3_912d52c0bbd9"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2568_267a2338_b61a_4482_b0e2_3ea1b8cd46b2"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_CommonStockMember"
      decimals="4"
      id="h_2569_016e7f8d_51a1_4085_812c_38d6c7c9ef57"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2570_5683ec6d_ab32_4f5a_a6cd_978b8a2d3390"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077661Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2571_597ef916_e663_45d9_8bfd_86bde37ab8cc"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_20_b0c3bfe2_5033_5e01_5a5b_8627eb1e7534">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077661Member"
      id="t_23_26bf3842_7436_a821_774e_39c6a7fc8d20">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000077661Member"
      id="t_21_83788528_ee1c_71c9_e3b5_0d16c4099561">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000114870Member"
      id="t_1_9d531340_7004_a5f0_e4f2_40511dee8b9d">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114870Member"
      id="t_2_c0240168_2a59_5a86_4f16_64dd61cd67cb">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114870Member"
      id="t_3_f264153f_9f4b_0c64_876f_f0daea8ef908">JDNNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_5_afaf12e4_4611_68f2_c469_007ee8a1807e">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114870Member"
      id="t_4_b6df1ba1_7f7c_ee60_6a54_2cbecb825c5f">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_6_2233b620_bfda_4d79_09d6_6f0ac5508faa">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114870Member"
      id="t_7_2ad421e2_5081_0f18_432b_32e1c46fb6a9">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114870Member"
      id="t_8_bbe49cae_324a_2ab7_4234_5e711c8fd3fa">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_9_fa30fcff_e5b0_7eff_8758_4bd5f1405721">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_10_f051eb00_ffa6_1858_53e3_1e8cf0de51bc">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class N Shares/JDNNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;70&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114870Member"
      decimals="INF"
      id="h_2572_c2fed96f_e065_4ba1_9efa_2e8145240aee"
      unitRef="USD">70</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114870Member"
      decimals="4"
      id="h_2573_8333415e_22c4_479c_ac80_f6672f81a365"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_26_01cbe444_71dd_3566_b532_51deed9dff72">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class N Shares returned 27.37%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_25_6092364a_7926_ac6c_5f2a_b651a5e0c69c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276344.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_13_4bbfc17c_7902_16ab_8f56_a66cea71de65">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class N Shares/JDNNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000114870Member"
      id="t_15_c360a39a_624b_16c8_dbc6_a24ee6d15aba">Janus Henderson Growth and Income Fund (Class N Shares/JDNNX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000114870Member"
      decimals="4"
      id="h_2574_db22236f_64db_4cf1_89aa_924f9eb8ddda"
      unitRef="pure">0.2737</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000114870Member"
      decimals="4"
      id="h_2575_a11ef179_58d9_475e_8c46_0ac2195190af"
      unitRef="pure">0.1226</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000114870Member"
      decimals="4"
      id="h_2576_3d43b4e0_c915_41d7_a47d_66d6b2cf77a5"
      unitRef="pure">0.1192</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_16_2d742890_0161_0c9e_67f5_58bc84d31023">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2577_e58a87ca_6347_4faa_bbfd_2b37abab9d0e"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2578_4e07a6b5_8c9b_4e88_8fbb_3618b6fc04ef"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2579_455c92da_a4ee_4ac9_8c3c_a72708404224"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114870Member"
      id="t_14_95bab2e3_7797_e59c_dd99_b06dd6b99f61">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_17_c8fdbc47_19f4_b575_56cb_9e1cd81b8044">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_18_c2f8542f_bb19_b564_f5b9_3a77016e23dc">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_19_4ec7c997_6e78_952c_f10a_44a7ac1aeed5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114870Member"
      decimals="INF"
      id="h_2580_6e7a2e65_4f9d_467e_a9d4_62faedd88927"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114870Member"
      decimals="INF"
      id="h_2581_8a946462_78cb_4970_90f9_3f513acaaaa7"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114870Member"
      decimals="INF"
      id="h_2582_b64c222f_0c89_4675_b5e4_3078e7eb83aa"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114870Member"
      decimals="4"
      id="h_2583_86c3d414_4d93_44ca_b651_9272005595d9"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_20_6e5aa8c2_bb50_9ef8_b713_8b7e874eb58b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276354.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_21_da9c3ef8_c153_3d8c_be1b_23b09af9d4cf">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2584_aeb33c9d_7bbe_46cd_9e12_fde10b597d9c"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_AppleIncMember"
      decimals="4"
      id="h_2585_94168f2a_08c6_48f8_a7c0_231acb1afe05"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_KLACorpMember"
      decimals="4"
      id="h_2586_c5a35f5f_7a99_4d71_9c09_4a9cafd692af"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2587_e7e02384_96d8_4d71_a714_c4793aadcfad"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2588_37fcab7f_417a_4a45_8504_08cb2f0673c5"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_CommonStockMember"
      decimals="4"
      id="h_2589_4dd08115_2cdd_4028_8651_4e031edd8412"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2590_217539c7_5292_4439_9950_3746b73cd89a"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114870Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2591_d7565eb8_71e3_4bae_b58e_62d1135190f1"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_22_7170632a_282e_4d97_ce8c_a95bc2eb1c3b">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000114870Member"
      id="t_24_365b47b9_12b7_3f2e_bb54_781ba8878f88">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000114870Member"
      id="t_23_e319ba2c_622a_39ef_0a2a_e0ce9e73558a">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000077662Member"
      id="t_1_dec48244_c609_af66_8899_b4b94f7ea601">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077662Member"
      id="t_2_a797613d_036a_f436_8989_a5d73bc320fb">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077662Member"
      id="t_3_c5327951_b43f_6c81_7e81_fbaa4bb883a4">JDNRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_5_de61e9a9_d227_555e_8fd4_8bdc3ea2905c">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077662Member"
      id="t_4_52783521_d243_14ac_ead6_e00fee72891e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_6_0b1730e0_49f2_8776_5597_cd65528d2eb1">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077662Member"
      id="t_7_2d0af57c_2983_2f77_da03_f31bd7505e53">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077662Member"
      id="t_8_43eaa645_677a_3dbe_3bcc_b71e1256b98b">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_9_825128b9_1f93_6803_0270_a4c06ab95ba5">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_10_59a440ad_7ac6_109b_6bb6_9edb305f4b7c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class R Shares/JDNRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;156&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077662Member"
      decimals="INF"
      id="h_2592_2ba152c2_d0a6_4d58_ad80_18097221a9d4"
      unitRef="USD">156</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077662Member"
      decimals="4"
      id="h_2593_5ad016f9_db45_4ab8_a12d_2360dfef5d58"
      unitRef="pure">0.0138</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_23_abf5fd8b_da1d_a97b_8757_e8a28a84f51e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class R Shares returned 26.40%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_22_8bc2a7eb_3ac0_25c8_a1c2_67f560997d2e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276383.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_13_dd69a45c_13e2_1650_1dd4_1e7b313e00da">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class R Shares/JDNRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077662Member"
      id="t_14_15065976_a935_ee99_578f_627b909b3089">Janus Henderson Growth and Income Fund (Class R Shares/JDNRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077662Member"
      decimals="4"
      id="h_2594_e66a506e_2759_49cc_968d_b9b5537a5c8a"
      unitRef="pure">0.2640</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077662Member"
      decimals="4"
      id="h_2595_b3bedc98_e6c0_4108_a0a9_bf3fb1bf2909"
      unitRef="pure">0.1140</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077662Member"
      decimals="4"
      id="h_2596_d8b8047a_4d52_4e50_b120_411860cfc736"
      unitRef="pure">0.1113</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_15_4c4f3c1a_144a_2778_2c6e_72babb57f296">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2597_bb83a1fc_d32d_445f_a9c1_ff0adfd80a06"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2598_ee67b536_a67d_4beb_8312_4b9087a0a485"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2599_ab962134_9828_4616_907b_ff57400a0d21"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077662Member"
      id="t_16_b4d0ff57_d809_e6b3_ab26_99f5c5b47d80">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_17_0b455ec2_ce6d_d948_36df_5facd69227ef">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_18_0eff4bfc_843e_96f7_1e21_933d51b942c2">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_19_5d2a6c54_3f8f_4004_a2a6_8a1d177ac9c4">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077662Member"
      decimals="INF"
      id="h_2600_a723e58e_1a2e_4ead_9d1c_9eefbb8d1edc"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077662Member"
      decimals="INF"
      id="h_2601_d27aef78_8536_4840_82a6_43ad58d4d5c5"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077662Member"
      decimals="INF"
      id="h_2602_ceefbde1_a8df_462b_9d02_9cf56ce8e56a"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077662Member"
      decimals="4"
      id="h_2603_8a108609_402c_4e57_acbe_3d0c738e279c"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_20_6fb19676_fa06_3c5f_0a78_66536b2ce922">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276393.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_21_2dbee6c8_e0cc_874f_6c6c_2d6e477e77a3">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2604_4be6983c_cb05_46d7_b527_eb272752fc56"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_AppleIncMember"
      decimals="4"
      id="h_2605_fa333798_179e_4cbf_acc7_c70029a0529d"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_KLACorpMember"
      decimals="4"
      id="h_2606_27bc250b_f047_47af_b463_81809bed8d2e"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2607_4b8d2642_e7cb_4117_8700_efe82cfa59d7"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2608_027972e5_5df5_41bb_8c65_e08b30016b94"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_CommonStockMember"
      decimals="4"
      id="h_2609_8e692540_cf6d_462a_a174_cbe0a61d1dfc"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2610_fd9d9f9b_3ec7_43f8_a57d_03442dac04e7"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077662Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2611_c0f68a6c_8c26_4191_9b83_2862f251f92e"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_24_722b73bd_17c9_fd64_89a9_add914768fdb">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077662Member"
      id="t_25_c7bb1a29_b217_8afe_5467_dbc958ac7024">&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000077662Member"
      id="t_26_e9aa903e_264a_53af_d98c_403c2f752299">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000077663Member"
      id="t_1_28809e60_2570_1507_a21f_a84f84920add">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077663Member"
      id="t_3_0f596db9_0b36_05da_8eb9_45ae202f3304">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077663Member"
      id="t_4_cadf3f81_3596_b8a1_9d5c_4e44f7114ec2">JADGX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_5_371e2bb4_ddaf_36d3_aa47_29970fa500a7">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077663Member"
      id="t_2_b5325d86_cd0a_ac04_8d74_89f8cc66fba0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_6_618679fd_75ec_6a1c_ace8_3c0e80a55b1c">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077663Member"
      id="t_7_065cff88_ace1_2f42_0b22_b513719b67dd">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077663Member"
      id="t_8_0338a36b_0bd9_ceb6_b87f_319a823754c2">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_9_4f839f89_6c26_d351_bb3c_c63811545639">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_10_900f6ee0_e85a_3e9c_9b02_0ce2ee50ce5c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class S Shares/JADGX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;126&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077663Member"
      decimals="INF"
      id="h_2612_e58545ef_7826_4056_9306_8f79b9f80ace"
      unitRef="USD">126</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077663Member"
      decimals="4"
      id="h_2613_5587a106_cb12_40ae_bf13_7d823b3f1df3"
      unitRef="pure">0.0111</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_26_5a444b81_4908_002a_2f33_8d000734fc0f">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class S Shares returned 26.75%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_25_e56636a6_7612_53dc_3bc7_92709dcd7072">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276422.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_12_a4657ffc_9cdc_5abe_b5a2_6c6790d496b1">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class S Shares/JADGX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077663Member"
      id="t_20_2d1d7303_8f82_56a1_4425_704ee3bbba5a">Janus Henderson Growth and Income Fund (Class S Shares/JADGX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077663Member"
      decimals="4"
      id="h_2614_e8cbd0cd_25c5_4653_b728_67b36cc9381c"
      unitRef="pure">0.2675</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077663Member"
      decimals="4"
      id="h_2615_14ab4012_793d_4aad_a0f0_cf5311e2766e"
      unitRef="pure">0.1171</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077663Member"
      decimals="4"
      id="h_2616_34f8879d_4ec2_46c8_8bc8_9197b0a6c307"
      unitRef="pure">0.1144</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_21_ccd84d7a_4476_0061_b587_be14ff50b604">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2617_d4b76245_25af_44b8_a683_b710c4c81ffd"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2618_3531fda5_85a3_443f_9ab3_7d2f4881c24d"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2619_3e7d142a_f198_40d3_9c37_075edcc3cbf0"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077663Member"
      id="t_13_56d65bb0_6220_c615_320d_ed5723ac4021">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_14_09c7cd53_9093_aeb4_30ed_35951e64bf64">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_15_386d0c4c_4809_a0d2_4025_6f41ad85a981">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_16_a16a6bd2_5585_27d6_93c7_d9e20a367ff0">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077663Member"
      decimals="INF"
      id="h_2620_25d54004_4890_4b0d_b193_ae021ce4da5a"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077663Member"
      decimals="INF"
      id="h_2621_efd5b52f_9b5f_41a6_a339_f88b75c14df3"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077663Member"
      decimals="INF"
      id="h_2622_d51918a1_3e79_4fa9_a82b_7fd0d8223080"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077663Member"
      decimals="4"
      id="h_2623_271c0381_7f8e_485b_b581_89561a1623de"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_17_7f7083ec_46b2_6ae3_a45a_80a92ae591c0">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276432.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_18_03095bff_d610_5b00_de4d_0b69b57fc89d">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2624_851037ca_d1ad_4041_b8f9_721005f12639"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_AppleIncMember"
      decimals="4"
      id="h_2625_3e7b24c7_0890_49a4_a880_36ecd80c8613"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_KLACorpMember"
      decimals="4"
      id="h_2626_366dba01_1bdf_420a_a286_f729756a50c7"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2627_57463890_1ca8_4baf_9779_991636ccf7a6"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2628_a01b55d3_d972_4265_be9b_e45fdb11c8d7"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_CommonStockMember"
      decimals="4"
      id="h_2629_5de12726_0fab_4464_a028_279d9166e0a5"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2630_f20baf4b_a5f3_4d29_831b_052b4b81d883"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077663Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2631_a6fdeab6_247f_4d8b_8c43_8158499b4273"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_19_bf59a614_778b_0419_11c3_af227bdae340">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077663Member"
      id="t_23_73edea4d_4aca_30cc_2baa_0b52bae2e191">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000077663Member"
      id="t_22_876a7687_e4b8_beed_6540_c627e0f2e6a1">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000028923Member"
      id="t_1_589b8ef5_6225_f53a_416f_cf74683714ee">Janus Henderson Growth and Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028923Member"
      id="t_2_fc064ecf_23f0_bcd4_fcca_fc4b86d099fc">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028923Member"
      id="t_3_10a3b967_c5e2_45b1_0651_0f2336ff10b3">JAGIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_5_47b6c7f2_dd05_e5cc_33f5_6c3cd6140996">This annual shareholder report contains important information about the Janus Henderson Growth and Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028923Member"
      id="t_4_04e5f86d_49bb_fe96_dc59_967b8c9f4330">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_6_b0bf6fa4_77af_1fb6_959f_e2873e56d18b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028923Member"
      id="t_7_d1b2a6ed_8771_ca9c_7e15_daf8c3a31e7d">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028923Member"
      id="t_8_8854dd7b_489a_4cc3_d27f_0026229d2db7">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_9_187a1afc_b9dc_8195_6c68_faef18a95554">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_10_62c98d25_3d82_e36f_41b5_e0d92494a387">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund&lt;br/&gt;(Class T Shares/JAGIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028923Member"
      decimals="INF"
      id="h_2632_c9c4ba13_3253_4162_9c80_f8b8cd65cc74"
      unitRef="USD">97</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028923Member"
      decimals="4"
      id="h_2633_12af3d0e_ab4c_4d0f_8692_08667ff28fce"
      unitRef="pure">0.0085</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_26_10c07a18_9484_5f6d_eb01_f7bc89a40a9e">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Growth and Income Fund Class T Shares returned 27.08%. Its broad-based benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;KLA was a top contributor to relative results. The semiconductor equipment company reported strong earnings growth supported by higher memory chip demand, capital spending on artificial intelligence, and demand stabilization in China. Financial services firm American Express, another contributor, reported strong profits growth that reflected higher customer balances and robust spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Accenture was a notable detractor from relative performance. The consulting company&#x2019;s business slowed due to a shift in IT spending toward artificial intelligence and away from legacy software projects. Nike was another detractor, as the footwear and apparel company&#x2019;s revenue growth faced headwinds in a challenging environment for consumer discretionary spending.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_25_de2397cf_55e0_9bc2_c1ff_fff75980ac29">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_276461.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_12_5edfe2e1_85c0_e729_f456_59edf1776e4e">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Growth and Income Fund (Class T Shares/JAGIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028923Member"
      id="t_20_484254ee_fb37_b01f_2449_56e01859ee8b">Janus Henderson Growth and Income Fund (Class T Shares/JAGIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028923Member"
      decimals="4"
      id="h_2634_ef84453d_61ca_49f5_8c90_13b28861a595"
      unitRef="pure">0.2708</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028923Member"
      decimals="4"
      id="h_2635_753f9fda_a78d_44c5_ae6e_ea99125fb1fe"
      unitRef="pure">0.1200</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028923Member"
      decimals="4"
      id="h_2636_29b1e5e1_497f_4c34_98c4_a1d63139a9f0"
      unitRef="pure">0.1173</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardPoors500IndexMember"
      id="t_21_51a7cdd9_0306_27ed_5aca_23df93d665d4">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2637_d7255b87_dc2b_49b2_911f_c814061f8610"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2638_e1bafcd5_3fb4_4686_9500_18c9a0697d65"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardPoors500IndexMember"
      decimals="4"
      id="h_2639_58a6202f_e0f6_436c_ac9e_c13f730a97ee"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028923Member"
      id="t_13_1399ad7e_a302_1cc9_9598_cd2c67464fd8">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_14_f80cdf53_b07b_b4bd_db5e_f8015bbd39f3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_15_f380ecd5_21f4_001e_8a94_6f711f289db4">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_16_ab3c945c_d3b8_138b_ff55_3a907eb188e8">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;7,576M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;66&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;42.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028923Member"
      decimals="INF"
      id="h_2640_b578c3f6_b946_4a95_88b0_59361214ae3d"
      unitRef="USD">7576000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028923Member"
      decimals="INF"
      id="h_2641_6a471c8a_6af4_4f4f_8d03_bdb27f7c0765"
      unitRef="Holding">66</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028923Member"
      decimals="INF"
      id="h_2642_cd074aff_a429_4fcb_adb8_0b637cf87ddf"
      unitRef="USD">42200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028923Member"
      decimals="4"
      id="h_2643_13a688fc_06ba_405b_8c6c_020d16615574"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_17_d9b8e09a_380a_edcc_46b7_c2f8333abf22">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_276471.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_18_85a1a486_dbc3_daaa_bcba_e9b302c3711b">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;9.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;KLA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;American Express Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2644_10178bf1_5748_4f5e_8741_dd8e24a0a9eb"
      unitRef="pure">0.096</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_AppleIncMember"
      decimals="4"
      id="h_2645_65aea5f0_a95a_4b02_9f99_25ec45430f00"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_KLACorpMember"
      decimals="4"
      id="h_2646_95842502_2ee5_4fac_ba87_365c9fd663d9"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_2647_082651d6_d6f2_4bd7_b586_75ccda9beeea"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_AmericanExpressCoMember"
      decimals="4"
      id="h_2648_e472694f_e3fe_46ce_9577_b43c2a2e0ed7"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_CommonStockMember"
      decimals="4"
      id="h_2649_d542b55b_ce22_43e2_9e21_69f03c6a1a1d"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2650_b42d410e_3a36_45b6_97d3_34740bda8805"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028923Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2651_5d01c56e_3754_4af1_b7a1_c646a602e682"
      unitRef="pure">-0.000</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_19_3cc41d2e_1497_a666_8fe2_6718fd045936">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000028923Member"
      id="t_23_dfc71f63_995e_baa9_b8ec_c0ed4ccec300">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Effective January 26, 2024, the Fund's contractual limit on total annual operating expense changed from 0.67% to 0.62%. The cap excludes fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2024_C000028923Member"
      id="t_22_203b0d87_7d8a_d69a_131b_c0c6cf038957">2024-01-26</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2024_C000077688Member"
      id="t_1_6ac06d69_6be1_c848_a503_f9ca2106a3db">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077688Member"
      id="t_2_49e0fd62_3137_cdb5_8fa5_7e50a39d653b">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077688Member"
      id="t_3_d45dd235_efc3_2984_159a_abf6c8dcc97f">JDIAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_5_f12d36d6_3fd0_ac62_c966_5d1276e5314f">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077688Member"
      id="t_4_8182b351_4dbb_590e_c3ed_f04b7a8468e3">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_6_de151b59_f11d_63e9_a7e0_a77cf1d368e3">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077688Member"
      id="t_7_5ddeb58f_1d79_3742_eee9_f726ef73c7ea">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077688Member"
      id="t_8_9e8ed20e_0e07_997b_99a7_317efa80ee07">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077688Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class A Shares/JDIAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;131&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077688Member"
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      id="h_2652_80dcb315_e2ec_47af_9b0f_cdc263be8e92"
      unitRef="USD">131</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077688Member"
      decimals="4"
      id="h_2653_43b704b6_ddbb_4d07_9210_1cb0a184902c"
      unitRef="pure">0.0118</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_23_cfb97362_ea2b_8015_8184_bb918c6db677">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class A Shares returned 21.36%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077688Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274043.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_11_32b0c5c7_d878_be72_046b_cb1eea6dba97">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class A Shares/JDIAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class A Shares/JDIAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077688Member_WithoutSalesLoadMember"
      id="t_18_c0b88c98_0d4e_35db_efc0_68181ce36ec6">Janus Henderson Overseas Fund (Class A Shares/JDIAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077688Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2654_41f5e79a_f0b4_468a_9a9d_f49ace383ff6"
      unitRef="pure">0.2136</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077688Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2655_97990bbd_c749_468f_a84e_234ba062e96f"
      unitRef="pure">0.1094</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077688Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2656_0119452c_b07e_4da0_bfb8_b8f5c1088ac8"
      unitRef="pure">0.0476</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077688Member"
      id="t_19_29716f11_ea94_18f3_0743_6c664523703c">Janus Henderson Overseas Fund (Class A Shares/JDIAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077688Member"
      decimals="4"
      id="h_2657_fbf3b052_8ef6_4577_ad93_5f682a79e1e8"
      unitRef="pure">0.1438</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077688Member"
      decimals="4"
      id="h_2658_603131c9_4e26_49f2_91eb_4b6ba4669c75"
      unitRef="pure">0.0963</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077688Member"
      decimals="4"
      id="h_2659_0ba3450c_572b_412d_adfa_543431854c6f"
      unitRef="pure">0.0414</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_20_c1cc03ef_556b_51f0_6108_54504d8bce51">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2660_d07fddd0_2829_4422_88bc_3ad02ea18ff2"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2661_0c1df820_35bc_413f_a687_c3be39c3a3bd"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2662_209c09f4_cc32_4ede_89b1_09b1bc847f5a"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077688Member"
      id="t_12_f72cbdac_dc93_24e9_2b65_0c7ab283f571">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_13_e60c84ef_ebcb_0777_66e9_b1819110e0e8">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_14_6239666d_5a5a_00f6_7e5b_30dbf1377129">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_15_04ab1c9c_b88e_0b2e_f614_e34196b5b70c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077688Member"
      decimals="INF"
      id="h_2663_fc456a64_b55f_49b9_9709_47349c60498b"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077688Member"
      decimals="INF"
      id="h_2664_e5cc70ab_b124_4a7b_b460_3509f5a52ed4"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077688Member"
      decimals="INF"
      id="h_2665_b612adc0_4a00_470e_b59f_5b743c2f75dd"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077688Member"
      decimals="4"
      id="h_2666_c8e08924_bbdf_4f70_894b_6088d950e638"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_16_958b5048_75f4_332c_3d14_54726eef7445">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274053.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077688Member"
      id="t_17_eb3b0797_6de6_cc0f_a2ed_47cea16c52f7">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2667_ec76f46b_2903_488a_aaee_2269716c4c0b"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2668_fa71095f_c18c_4e66_bf4e_41edc21c488d"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2669_8bbd551f_501c_4c85_85f2_051c93d5d900"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2670_245a9623_4218_4117_ae2f_72487c5e5812"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_BNPParibasSAMember"
      decimals="4"
      id="h_2671_3298fb7e_9b05_4ff8_a4eb_c07a34570372"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_CommonStockMember"
      decimals="4"
      id="h_2672_ed786771_4c89_452c_bac9_cfa135c7604c"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2673_9a42c280_3939_4614_bc49_404a9cbdbf83"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_PreferredStockMember"
      decimals="4"
      id="h_2674_cbbb9e10_1898_412b_931f_3573a03e70aa"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2675_f52616f4_7604_4c78_9585_6651ecaddb80"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077688Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2676_3034cbbc_0be9_44eb_8632_e8ac0dcc64f1"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077689Member"
      id="t_1_d4d5b6ca_b4ec_9fd9_afd5_99ec503ab491">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077689Member"
      id="t_2_a4df3c1a_1200_a003_ec47_f08ef424bcd6">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077689Member"
      id="t_3_bbd806db_19e3_e177_1722_a69440e820ca">JIGCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_4_c8c21762_8f9a_2861_ad20_d23b23bb2128">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077689Member"
      id="t_8_adc6315f_f198_21d7_052f_9d0de1116c03">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_5_65a37620_a0e4_0613_41f7_e14d3aeff4a1">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077689Member"
      id="t_7_652829f0_5f4a_8b54_5546_0bf3e2973c08">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077689Member"
      id="t_6_5c100b8d_ca74_ec10_bd2b_01d954bbc0e4">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_9_f6ab79d5_4130_796e_4ba1_8283a48643d8">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_10_3553cb85_033e_4344_784c_2889a59ca30d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class C Shares/JIGCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;202&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077689Member"
      decimals="INF"
      id="h_2677_488b2fff_c544_4f1b_b08e_bdfc57dafe4b"
      unitRef="USD">202</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077689Member"
      decimals="4"
      id="h_2678_a6e78e3d_12f0_41ad_b8ad_08b3352eb3f9"
      unitRef="pure">0.0183</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_28_309389b3_7b47_489b_f24a_a5676e0ae847">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class C Shares returned 20.58%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_27_2ed84795_110c_0588_d1a5_2cc7c3aac13f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274082.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_13_41bd9415_1182_ed67_e8e0_f919d9adf430">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class C Shares/JIGCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class C Shares/JIGCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.58&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;3.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077689Member_WithoutSalesLoadMember"
      id="t_22_d9ea33d3_3272_169b_8b7d_4276549e7ec8">Janus Henderson Overseas Fund (Class C Shares/JIGCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077689Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2679_03f3e484_4185_42cf_8829_2b85270fdae3"
      unitRef="pure">0.2058</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077689Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2680_caf5cbd1_f5cd_4cc2_922d_e4df6b19e49e"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077689Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_2681_f8f809ba_22a1_4355_94ec_ed09ca0e6c37"
      unitRef="pure">0.0396</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077689Member"
      id="t_23_ab07c8cb_6bbd_241e_f2de_33633157e712">Janus Henderson Overseas Fund (Class C Shares/JIGCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077689Member"
      decimals="4"
      id="h_2682_843d3bc6_2acb_4c4f_bfe4_6c7c85704137"
      unitRef="pure">0.1958</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077689Member"
      decimals="4"
      id="h_2683_b9f00720_8f20_4e3b_b5f5_46810ec051b4"
      unitRef="pure">0.1007</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077689Member"
      decimals="4"
      id="h_2684_240baaba_11d0_434d_84e4_49f3860e60d4"
      unitRef="pure">0.0396</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_24_09c34433_c2b8_3714_d54a_28e74455549b">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2685_56c70b70_c9dc_472e_8bf0_e4a000ab27fa"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2686_48cdb40f_e4e6_4982_a086_ba2aa63b84d8"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2687_47eb36dc_4ee6_45d8_bbc9_bcb361e661e7"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077689Member"
      id="t_14_12fdbcb0_a95f_d0f9_7bf0_9f7e9b23108e">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_15_945722e6_e776_341e_4534_f4650658c3d2">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_16_5d129030_86b7_fdae_abcd_1c50f824ebb7">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_17_3205d89e_b372_af99_f1b9_c4994cf0e84d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077689Member"
      decimals="INF"
      id="h_2688_ce7eaacd_6892_493c_b9e0_4547dd230e3b"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077689Member"
      decimals="INF"
      id="h_2689_e16334e4_eb6a_42d5_bddb_e80a8f7e40dd"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077689Member"
      decimals="INF"
      id="h_2690_1a58d196_e8e0_4b80_9509_aeb0bfbc3e99"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077689Member"
      decimals="4"
      id="h_2691_5358cc42_b299_46fc_babb_179b7d41580e"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_18_184a2ec6_0c81_0442_354d_1669fe139fc1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274092.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_19_15b1cc41_9219_393b_9fa9_34842f907a1b">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2692_d491a275_879b_45b3_80a1_a6199c285030"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2693_8ce11b75_5e65_42bd_9a89_d0235ef0b723"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2694_551ba20a_5a3c_46a6_8a3f_f9b615a714ac"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2695_5e334dee_3896_4a43_bb45_a8d376fb3958"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_BNPParibasSAMember"
      decimals="4"
      id="h_2696_226bd98a_c934_4a43_9189_4bd97e097b0d"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_CommonStockMember"
      decimals="4"
      id="h_2697_5b4b86ee_4330_4bc8_9b67_47666013135d"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2698_8d3611e6_fd59_469e_8fb9_b055c7d9d04e"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_PreferredStockMember"
      decimals="4"
      id="h_2699_9a9eee91_2591_4e95_954d_2b639964a566"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2700_a186cc67_db5e_4e82_afd9_a9a4efe1f1c3"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077689Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2701_8b45a7d9_7144_4145_b760_4b24ff24b36a"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_20_b2a73519_58c0_d34d_b72f_4dabfac802d5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Previously, Janus Henderson Investors US LLC contractually agreed to limit the net annual fund operating expenses of Class C Shares of the Fund to the extent they exceeded 1.95%. The cap excluded performance adjustments to management fees, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses. This limit was in effect for a period of one year and was discontinued on June 16, 2024.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077689Member"
      id="t_25_6b653ba6_73d7_1590_0501_016c76746a99">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Previously, Janus Henderson Investors US LLC contractually agreed to limit the net annual fund operating expenses of Class C Shares of the Fund to the extent they exceeded 1.95%. The cap excluded performance adjustments to management fees, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses. This limit was in effect for a period of one year and was discontinued on June 16, 2024.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000083522Member"
      id="t_1_bfab8d1f_017d_34cc_cf99_d9c028102f59">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083522Member"
      id="t_2_d9aea446_2547_6625_ab83_12153cc822b6">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083522Member"
      id="t_3_76981fd9_0a13_7a40_ed63_687fbeb73952">JNOSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_4_0b367387_55f3_0ef8_162e_e254c855e14c">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083522Member"
      id="t_8_41dea049_d99e_2f96_f569_12f0d48d024d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_5_49ea758b_6568_b979_5282_855c6e3e7853">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083522Member"
      id="t_7_13906023_4c4b_a935_014e_0fd1dde42186">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083522Member"
      id="t_6_68f7113a_fc9d_27ac_5587_56e414b13182">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_9_73c90abc_37b7_8b12_af24_dd4d35018448">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_10_fea8ef62_72d3_3ac7_6582_65062c7e3dfb">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class D Shares/JNOSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;104&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083522Member"
      decimals="INF"
      id="h_2702_d3975c9a_2030_42af_a74f_b734bc6a8139"
      unitRef="USD">104</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083522Member"
      decimals="4"
      id="h_2703_6ecf5907_5cee_4c79_911e_a7f3d394b3ae"
      unitRef="pure">0.0094</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_27_42e02089_4a1d_416c_13cc_8062aaa3be6b">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class D Shares returned 21.65%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_25_f69deb5b_69e9_2111_d1d9_a047b650e618">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274121.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_13_c35465b4_b5af_3df3_53ea_6b357b51ce22">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class D Shares/JNOSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.24&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000083522Member"
      id="t_17_bbf52df8_b510_c31a_e23b_67a3e50c2bbe">Janus Henderson Overseas Fund (Class D Shares/JNOSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000083522Member"
      decimals="4"
      id="h_2704_44d69b9a_765d_42b7_8194_25ea5f6ad70a"
      unitRef="pure">0.2165</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083522Member"
      decimals="4"
      id="h_2705_3966549c_fb3a_4d02_88cb_01f931783e81"
      unitRef="pure">0.1124</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000083522Member"
      decimals="4"
      id="h_2706_298c5836_3597_4199_99f0_8fd729efbbd6"
      unitRef="pure">0.0506</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_18_29c590ed_fc4a_a711_2160_244769d0798e">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2707_6d065065_2056_4717_84c3_a36f51d04dde"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2708_0dc0366b_102c_44c4_ae92_0333d47200e3"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2709_c38c17b9_cac7_4c73_9503_543bbdae8b36"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083522Member"
      id="t_14_3ca84248_356e_b843_f2f5_3588296bf096">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_15_a7dfdfbc_9931_2a3d_3d48_1d7280cfac9f">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_16_dc8d875f_2d93_7a52_0a0c_1cf188cd6c8e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_19_0f275d9d_1355_5152_af23_78fac849fd2b">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083522Member"
      decimals="INF"
      id="h_2710_3cdcc49c_4c2a_4632_a78f_9231cef61404"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083522Member"
      decimals="INF"
      id="h_2711_573ad091_e097_4e1f_8afb_18b5ea9754cf"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083522Member"
      decimals="INF"
      id="h_2712_bce1adea_30d9_4926_89a6_254dd6b9e762"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083522Member"
      decimals="4"
      id="h_2713_1a3a1edb_6947_4616_a635_7d4cdba766f1"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_20_594c77d0_d0b8_f679_89b3_e9657b079e1d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274131.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_21_e74870f8_ee7e_e484_f326_c4c4b36fb84b">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2714_1be5dfcd_1f95_4b99_9cb3_194ed39d2b6a"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2715_e12faf7a_fdf9_4520_a46d_c2825a255dba"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2716_09beaea9_741b_4a12_9008_60df662b2cca"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2717_0909d954_3102_4906_8977_f55bb9f82477"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_BNPParibasSAMember"
      decimals="4"
      id="h_2718_6b76c911_484c_4daa_8ce7_140c6cf2474a"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_CommonStockMember"
      decimals="4"
      id="h_2719_8b8197eb_1207_4948_af5a_9f290f9fe02c"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2720_c0ac73e8_adac_4d5f_8b65_bc30ae1a8914"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_PreferredStockMember"
      decimals="4"
      id="h_2721_fbcc01de_f89d_429a_bb4d_007ae2078b4d"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2722_0f75a17b_3256_41d5_98e1_b2e13a97b5da"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083522Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2723_79f9070d_bac4_4ff9_8fa4_3edd52b6ed56"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_22_47580cc6_205c_d6b9_6a86_8a326d6d3ac9">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Previously, Janus Henderson Investors US LLC contractually agreed to limit the net annual fund operating expenses of Class D Shares of the Fund to the extent they exceeded 0.95%. The cap excluded performance adjustments to management fees, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses. This limit was in effect for a period of one year and was discontinued on June 16, 2024.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000083522Member"
      id="t_26_6ed2a97f_820e_94c0_d0bb_0e08341c48b0">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Previously, Janus Henderson Investors US LLC contractually agreed to limit the net annual fund operating expenses of Class D Shares of the Fund to the extent they exceeded 0.95%. The cap excluded performance adjustments to management fees, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses. This limit was in effect for a period of one year and was discontinued on June 16, 2024.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077690Member"
      id="t_1_c31fbd01_c2cc_b041_e631_84a3ac3371d0">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077690Member"
      id="t_2_3a04a1fe_06dc_1e4c_490e_8261264c68b2">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077690Member"
      id="t_3_48d3f0e3_ee5e_a688_20cf_26bfad8b1fd2">JIGFX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_4_6159bcf3_995e_20c9_04ff_8ee5452d2c5c">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077690Member"
      id="t_8_3fb422fd_19e7_ddef_7e91_44830e8735b4">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_5_b694e02c_5308_90ad_b6b9_5db002c4d7fd">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077690Member"
      id="t_7_299b82a4_e81e_ca4e_3c89_2587ebb90648">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077690Member"
      id="t_6_076c6079_e706_13ca_484e_5126c63126b9">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_9_dea41ddc_dc93_aaf5_e858_3ee426796db3">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class I Shares/JIGFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;100&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077690Member"
      decimals="INF"
      id="h_2724_1b0435ff_0893_47d2_a6bd_006c2f19dc64"
      unitRef="USD">100</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077690Member"
      decimals="4"
      id="h_2725_1934a6ab_e6ce_4bc8_8f8c_b6cb1c26b2bc"
      unitRef="pure">0.0090</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_23_dee123dd_f7f2_910f_a2c8_d296a31917f3">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class I Shares returned 21.71%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_22_9f9123ff_f601_f4e5_c797_7e567447b794">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274160.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_12_e24f7bca_a33d_38ee_5ab4_3ff86224ffac">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class I Shares/JIGFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077690Member"
      id="t_19_5e500492_9938_7c38_19ca_bcd8b7be2a4b">Janus Henderson Overseas Fund (Class I Shares/JIGFX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077690Member"
      decimals="4"
      id="h_2726_ed6721ce_4e40_4e1e_b880_092deec42096"
      unitRef="pure">0.2171</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077690Member"
      decimals="4"
      id="h_2727_f078e040_4570_4d22_993d_e811e2231e7c"
      unitRef="pure">0.1129</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077690Member"
      decimals="4"
      id="h_2728_d7ce6b29_0689_463d_9fd7_66caac1c8e0d"
      unitRef="pure">0.0510</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_20_82165565_3828_f9dd_a0ae_4dafffe05600">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2729_cbc4f6de_d8c3_4cbc_938f_e85962f84bbb"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2730_f376cf8d_9e25_4a2e_9b87_393b7b83ae36"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2731_afcbc0c9_5ad0_458b_a5c4_fdf7c1db16f7"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077690Member"
      id="t_13_c72843db_d299_a663_0805_19688449211e">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_14_1fd037e9_2052_790e_908d_8214f9e7282b">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_15_912991bf_d612_8fe2_4a82_fbeaa4d15463">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_16_e6699bde_0f2c_fb7f_d4a6_b8d2bcb188e5">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077690Member"
      decimals="INF"
      id="h_2732_e1692080_1412_495e_9748_9919a39a7e87"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077690Member"
      decimals="INF"
      id="h_2733_603a7fd0_8cf3_47ec_9163_2161e40c39d3"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077690Member"
      decimals="INF"
      id="h_2734_b287f975_0872_491f_8aec_b315162f068a"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077690Member"
      decimals="4"
      id="h_2735_afc007bb_6ba3_4cda_8534_94a2bcc948ce"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077690Member"
      id="t_17_39326f71_209a_9201_277a_56e28cba6f70">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274170.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:PctOfNav
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      decimals="4"
      id="h_2736_e7e44c29_cacc_4a7b_a287_bcc89f09a1b2"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2737_12cc8453_e0ef_4038_957f_8fe4cf510e67"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2738_7ef37b12_2a4d_4a6a_9cf2_2bfe05edc029"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2739_87e4ecf3_830d_4bf2_a143_ff470ddfb843"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_BNPParibasSAMember"
      decimals="4"
      id="h_2740_dba87820_3a70_4ec6_b134_28e12ad4b428"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_CommonStockMember"
      decimals="4"
      id="h_2741_7d93e5ef_780c_4732_8983_8bccdb06dd15"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2742_6ea8cc90_b67a_4989_b79e_664cbe0d777a"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_PreferredStockMember"
      decimals="4"
      id="h_2743_2652cd35_2bae_4e29_abfb_1ba41a9a564e"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2744_6d17b84b_5b01_43dd_afea_bd973f4a086f"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077690Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2745_49c6528e_12ef_46b1_82b0_966486f84524"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000114876Member"
      id="t_1_b3887126_d594_80da_5c32_83681ab7a946">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_90e0c37d_50ea_f140_d734_ed737f51a08d">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114876Member"
      id="t_3_b80b44e3_880a_d6d3_8326_14b0681402a4">JDINX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_5_8806b752_b16c_b612_96a0_17711a31567b">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114876Member"
      id="t_4_7d8d1614_f659_f606_7f33_dad37029640b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_8_58ed224a_4a6a_fa86_1648_94667dcb70db">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114876Member"
      id="t_6_7ea5ff4e_f424_f8fb_2fb4_5a1ab58e7ae9">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114876Member"
      id="t_7_f8b7cb39_99a1_8c51_683e_306484c43774">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_9_a2766ca6_7e4f_703d_f9eb_388471d3a308">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class N Shares/JDINX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;89&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114876Member"
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      id="h_2746_99766074_3f8f_4f64_b0f0_2f263a8e7896"
      unitRef="USD">89</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114876Member"
      decimals="4"
      id="h_2747_07875ddc_ff22_4867_9d51_d20be0a113a4"
      unitRef="pure">0.0080</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_21_c7f39664_cd3d_7116_4d62_03f45ad14a25">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class N Shares returned 21.83%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000114876Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274199.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_12_fe8b0b31_a1e6_b056_0383_9248113c3d33">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class N Shares/JDINX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000114876Member"
      id="t_18_fb608756_4132_81a6_cc9f_0d32efcf4ce8">Janus Henderson Overseas Fund (Class N Shares/JDINX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000114876Member"
      decimals="4"
      id="h_2748_9d6aeb59_c8ee_4e59_8b07_7febc0a71819"
      unitRef="pure">0.2183</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000114876Member"
      decimals="4"
      id="h_2749_b5d37550_592c_4499_95c5_e7f20a44a92c"
      unitRef="pure">0.1140</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000114876Member"
      decimals="4"
      id="h_2750_8f0ba9a8_0b2b_4cce_8935_1b0218fd8c6e"
      unitRef="pure">0.0521</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_19_1f86a37e_1218_5c7d_be42_b1b1ef379724">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2751_d5cc2590_e377_4dc8_af33_a90860361494"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2752_e22fb3cb_6aa7_4a16_8fb5_3cbd1ba46719"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2753_81b2d1c6_b343_4fe3_8266_69c732858730"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114876Member"
      id="t_13_5f018c56_b16c_8919_4e4f_7c94dd5286a7">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_14_5cf401cf_4aaf_6c19_2bcb_d90d623bba65">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_15_f244bc19_c0fe_f07f_495f_0bf0d2f2168a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_16_19f9bb2f_202c_e4da_e649_1e01ad5954bf">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114876Member"
      decimals="INF"
      id="h_2754_6b90f03d_cfb5_4760_b710_a3fa5ae7ccfc"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114876Member"
      decimals="INF"
      id="h_2755_68f10467_a20e_4d2d_bc60_648af8ee3e7b"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114876Member"
      decimals="INF"
      id="h_2756_c706c5d3_8b65_43fd_bac9_66baff11c4dc"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114876Member"
      decimals="4"
      id="h_2757_af75a3b1_35d7_49c2_b196_5860f0ac8e40"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_17_e905c6a6_461c_51e1_c26b_bbc3f527bd26">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274209.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114876Member"
      id="t_20_93839285_9a17_a32c_d586_b4090e2b82f1">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2758_3e9d60b1_9984_4b4f_8a96_02414fbed5e9"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2759_3295fda7_7cb1_46eb_8614_0a08bdf2ca5d"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2760_7049ad35_021b_4a20_a23a_20a5e6fbe4ab"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2761_98f0c47f_ba48_4a09_b6e4_660b9504eef4"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_BNPParibasSAMember"
      decimals="4"
      id="h_2762_ac0afd6c_0294_4a9c_98d8_2d92b5946957"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_CommonStockMember"
      decimals="4"
      id="h_2763_70e041ff_bcc1_4efc_bc2b_c5a866ba5cb6"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2764_7e8a8390_93c8_44db_ae42_158ee1c0ce06"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_PreferredStockMember"
      decimals="4"
      id="h_2765_34e91e1f_acd1_4177_85a4_55500da1e6e3"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2766_45b76355_8ed7_44d4_9372_75abc07d4745"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114876Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2767_5b80200c_96f9_4984_a1e2_f8b8d2306e98"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077691Member"
      id="t_1_a340e502_fd80_ba6f_b631_645b5bd074a7">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077691Member"
      id="t_2_5ac3809d_d739_6abf_f551_351c71d85204">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077691Member"
      id="t_3_d6da3460_b05f_d169_3129_bfe3f1a8b760">JDIRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_5_9f8e3b80_ce23_a67a_0774_0c74ade3cb72">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077691Member"
      id="t_4_314419ba_d0db_49b6_855e_6f9106095216">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_8_a68bef62_c3dc_03fc_f2d3_d5406ead9d8b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077691Member"
      id="t_6_24c5b869_d60a_c116_d094_fa116bb129a2">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077691Member"
      id="t_7_53dc7c8e_c420_57ff_dbe3_ebbba068f0cb">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_9_298d73cc_dd20_df12_4a88_cf1940feb315">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_10_9032b3e7_03a7_26dc_e6bb_b9aeccb56898">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class R Shares/JDIRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;171&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077691Member"
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      id="h_2768_cfc41185_0339_43cf_a482_f3b97fa13c63"
      unitRef="USD">171</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077691Member"
      decimals="4"
      id="h_2769_35c78058_5517_4b3c_a5db_efaae5f3881c"
      unitRef="pure">0.0155</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_24_cb395431_58a6_cea4_e4ce_1f223e93dce7">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class R Shares returned 20.93%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274238.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_13_99915464_7e66_b081_d1dc_47f002c0efe9">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class R Shares/JDIRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077691Member"
      id="t_21_cc194452_2871_fe91_9365_e3281da020f1">Janus Henderson Overseas Fund (Class R Shares/JDIRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077691Member"
      decimals="4"
      id="h_2770_518d1e78_7496_4ef2_a645_4d3b96474532"
      unitRef="pure">0.2093</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077691Member"
      decimals="4"
      id="h_2771_294308dd_b0a4_43e3_aa36_9dba902713d6"
      unitRef="pure">0.1057</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077691Member"
      decimals="4"
      id="h_2772_8ecbc118_7277_476d_9912_f2317eacb51e"
      unitRef="pure">0.0444</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_22_bcc19d3d_695a_d759_177a_47dac78182e5">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2773_400ad81a_738c_497d_ad57_a19fc522a23a"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2774_9190addd_8575_4e6c_8ece_1f79b97dd3da"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2775_1d1a7fda_5f5f_4885_95a5_14b8813fc067"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077691Member"
      id="t_14_67877180_7a56_dbf9_1ebe_4f67a1c0844b">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_15_b3f733ca_2a68_0b7b_4c74_866149b7f450">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_16_735aa549_fc60_422a_ace4_5fec3980a29b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_17_ea157fb8_294f_bb06_dd61_0ad573b1c5d6">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077691Member"
      decimals="INF"
      id="h_2776_b2a6e7f5_3619_452e_b982_7587102a06e9"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077691Member"
      decimals="INF"
      id="h_2777_58cc73d6_d54b_4c09_8469_58fdda71ed8c"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077691Member"
      decimals="INF"
      id="h_2778_162b90a4_2710_41a9_a996_0c77cb5e95b7"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077691Member"
      decimals="4"
      id="h_2779_7da7fde7_80a8_40b7_9631_fde62e398535"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_18_3ad2e5a1_e33a_7ef5_5482_bcea5229a337">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274248.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_19_8d6ae996_b3a1_1f42_b674_6ac0a65e1aa3">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2780_a91eaa49_0886_474a_b3be_b2f3ca6eb1a7"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2781_e5a350d0_ac84_4878_9833_cc12457b3c7f"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2782_e7b2d9e4_2f7c_439e_8dda_34ac3899d6e7"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2783_fd02144f_7503_4767_be1c_fb32b97660ab"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_BNPParibasSAMember"
      decimals="4"
      id="h_2784_c38119b5_a7c9_46b3_92fd_5f6df41dcc17"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_CommonStockMember"
      decimals="4"
      id="h_2785_2e4a482d_7221_4152_97f5_0c5acb9a817a"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2786_75681dda_346c_421c_84d6_874864bbe42e"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_PreferredStockMember"
      decimals="4"
      id="h_2787_b6b04a21_1219_4607_a050_b13d4ecb44af"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2788_cfde3cd5_c542_4754_a424_ac91abe5a9c0"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077691Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2789_70e4542c_0e8c_448f_b53c_cff366619356"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_20_63b2f99b_3891_2d39_9c34_a6ef2cb769f6">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Previously, Janus Henderson Investors US LLC contractually agreed to limit the net annual fund operating expenses of Class R Shares of the Fund to the extent they exceeded 1.54%. The cap excluded performance adjustments to management fees, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses. This limit was in effect for a period of one year and was discontinued on June 16, 2024.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077691Member"
      id="t_23_3490cc91_2c89_7bc4_a5a2_7ec803c1857b">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;Previously, Janus Henderson Investors US LLC contractually agreed to limit the net annual fund operating expenses of Class R Shares of the Fund to the extent they exceeded 1.54%. The cap excluded performance adjustments to management fees, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses. This limit was in effect for a period of one year and was discontinued on June 16, 2024.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000077692Member"
      id="t_1_706fa488_f99c_2dec_7795_b86e1558be04">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077692Member"
      id="t_2_a62f6807_7ccd_440e_66f0_43d433587ae6">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077692Member"
      id="t_3_f48644a7_c7cd_9ece_a424_d952548fe53b">JIGRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_5_50c248e6_4efa_5088_da9f_e32d1c34ba7e">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077692Member"
      id="t_4_dfc432dc_0b8b_5e85_f012_11c3bab45807">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_8_21004c60_d000_4175_c7ee_33ac86f9d15e">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077692Member"
      id="t_6_d579b268_907a_448d_508f_1e7547eab682">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077692Member"
      id="t_7_15437187_323c_cbec_8223_ab35338cb0fd">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_9_d2969835_5939_6af4_06cd_66b110204af4">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class S Shares/JIGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;143&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077692Member"
      decimals="INF"
      id="h_2790_36b78584_fe0b_4c00_9fd2_fbd100097a71"
      unitRef="USD">143</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077692Member"
      decimals="4"
      id="h_2791_d78ff9d1_6bc2_473e_923a_5de2c1a97109"
      unitRef="pure">0.0129</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_21_eb4113f0_c4f9_bcd6_e43b_c6b79ef8ee65">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class S Shares returned 21.23%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_11_024373ac_ba89_05da_d243_1a6db2fd16f1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274277.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_12_048b179e_6a79_b38f_1e8e_475e78d3aec6">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class S Shares/JIGRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077692Member"
      id="t_19_8a7c57d3_4899_339f_ecbd_56892b701a84">Janus Henderson Overseas Fund (Class S Shares/JIGRX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077692Member"
      decimals="4"
      id="h_2792_daeca685_eba3_41a0_b562_7d34e3e48736"
      unitRef="pure">0.2123</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077692Member"
      decimals="4"
      id="h_2793_aa0cc807_4cc9_4c19_9ee2_eebcff8d36db"
      unitRef="pure">0.1085</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077692Member"
      decimals="4"
      id="h_2794_cc4dbe4a_fb69_42e4_8253_9c459ff60350"
      unitRef="pure">0.0470</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_20_618703cb_677d_a593_b338_bb93982afd8a">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2795_995a3bb8_dd51_4a62_932d_06d4c29caa16"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2796_248574b6_28db_4276_95ef_6aae037d47aa"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2797_6314ec95_6e6e_4941_a8c1_b6c7c260af03"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077692Member"
      id="t_13_19892dca_782a_e46c_276d_f3291fa469a8">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_14_98c3ff34_59a2_f41c_d8ae_229511b52666">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_15_8f5ee312_b238_fad1_d672_5041b9efd895">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_16_b5f84840_0bee_103d_208b_ec05066d3e0c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077692Member"
      decimals="INF"
      id="h_2798_89db77a6_2819_4e85_ae3d_cda76e7e89b6"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077692Member"
      decimals="INF"
      id="h_2799_769f53dc_2a1c_445d_b049_a6724f44d44c"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077692Member"
      decimals="INF"
      id="h_2800_29f70bc2_bd32_4b59_ac87_bd6aea6087c8"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077692Member"
      decimals="4"
      id="h_2801_48852ca0_7378_49f0_95b8_14f7e32d698b"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_17_944ceab1_0086_f321_5444_2e2906c10be1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274287.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077692Member"
      id="t_18_9e95411a_28c5_5889_222b_44609ff35ec4">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2802_c443f4d0_4139_4cf9_9d80_10a60f815ea2"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2803_78aa64bd_59d5_47de_876e_588a4f2663c4"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2804_d5fe1d67_c9aa_41ed_aa5e_142e7e78530a"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2805_bf7a0a5d_23ce_40df_8e97_460f9011aaca"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_BNPParibasSAMember"
      decimals="4"
      id="h_2806_9200e4a1_132e_4baa_936b_5379c2af3840"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_CommonStockMember"
      decimals="4"
      id="h_2807_1adab65e_8573_4bb8_a710_6ba6524a05ff"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2808_5fa9bb84_62f3_4b6c_a69d_36ef1764f27c"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_PreferredStockMember"
      decimals="4"
      id="h_2809_7e92eebd_ae51_433b_9357_b378a4e609cd"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2810_ebef49e0_7f97_4bcf_8edb_892b3ad9a3ec"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077692Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2811_a0b68dd4_3fae_4d5d_9904_cdc0a17a0b45"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028935Member"
      id="t_1_472a8a4e_a0d3_fe8e_f316_ec970b37ccdc">Janus Henderson Overseas Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028935Member"
      id="t_2_01a25844_9943_505a_6292_6d62440bd64f">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028935Member"
      id="t_3_768ffb94_6085_e116_69ec_cea276c52bf3">JAOSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_5_0e683ac5_95c0_2f5b_8b52_4ddf4f80c74f">This annual shareholder report contains important information about the Janus Henderson Overseas Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028935Member"
      id="t_4_ff9f4207_51d8_450a_420d_f6e689612110">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_6_446b5219_f270_a327_5dd5_43bc6e0771d1">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028935Member"
      id="t_7_34d9ac97_cc32_9da3_a718_8027bf87e95b">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028935Member"
      id="t_8_286f5d4d_cbc9_9629_d76c_4efa948ba016">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_9_6da578cc_e1b0_7048_d4ee_bac1d2da7824">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund&lt;br/&gt;(Class T Shares/JAOSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;114&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028935Member"
      decimals="INF"
      id="h_2812_29db1d04_0d47_4417_a9a8_44d92be6f4e2"
      unitRef="USD">114</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028935Member"
      decimals="4"
      id="h_2813_8e37b00c_b9d1_4c47_a5e9_c4b9eeeb66bf"
      unitRef="pure">0.0103</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_23_bfc8113a_35c0_a692_a71c_0c533b02119a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Overseas Fund Class T Shares returned 21.54%. Its broad-based benchmark, the MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;, returned 25.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Taiwan Semiconductor Manufacturing Company (TSMC) contributed to relative performance. TSMC delivered strong revenue growth, fueled in part by its fabrication of graphics processing units integral to the deployment of generative artificial intelligence. Italy-based international banking group UniCredit, another contributor, was rewarded by investors for its disciplined, shareholder-friendly capital allocation.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Samsonite International detracted from relative results. The multinational luggage company reported lower-than-expected revenue growth and reduced guidance, due in part to macroeconomic weakness in China. UK-based online and sports betting company Entain, another detractor, faced regulatory uncertainty and competitive challenges in the U.S. sports betting market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_22_b38f1f66_1a42_dbb7_4f51_4bdb0231b515">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_274316.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_10_7a42a618_a0bc_12b6_3561_602d09362887">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Overseas Fund (Class T Shares/JAOSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;11.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;4.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;MSCI All Country World ex-USA Index&lt;sup&gt;SM&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028935Member"
      id="t_11_68123b15_acdb_b36f_e3e6_9e6d5f0e63be">Janus Henderson Overseas Fund (Class T Shares/JAOSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028935Member"
      decimals="4"
      id="h_2814_b6ce732f_ba35_4a86_b08e_565b2b91c9f0"
      unitRef="pure">0.2154</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028935Member"
      decimals="4"
      id="h_2815_dcd8e0a4_0035_4c79_9276_56b09a443855"
      unitRef="pure">0.1114</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028935Member"
      decimals="4"
      id="h_2816_e3a2a15e_74f1_4ab1_8a46_763e3da4e0f4"
      unitRef="pure">0.0497</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      id="t_12_8870d5aa_b4ed_52f4_4d2f_82f0423f8194">MSCI All Country World ex-USA IndexSM</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2817_50ee5920_c5ad_481c_bc33_df3acc106c76"
      unitRef="pure">0.2535</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2818_87cb4e04_60c2_475b_b4db_9a6e7e4f0a74"
      unitRef="pure">0.0759</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MSCIAllCountryWorldExUSAIndexSMMember"
      decimals="4"
      id="h_2819_bbc2356c_b200_44af_8a95_e674153b8d66"
      unitRef="pure">0.0522</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028935Member"
      id="t_13_adb67ce9_b42d_5966_f32c_02ba17d7c046">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_14_afa6431a_25a1_4704_53ce_bb148a0426e2">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_15_3525dce6_3692_cff0_c72f_53f30b268c1f">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_16_14c8e085_9e24_c4a0_6ae7_ba7e6b3e63e8">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,543M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;46&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23.8M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028935Member"
      decimals="INF"
      id="h_2820_cf36c8a9_cb1d_472b_ab5c_e8a8f362ca25"
      unitRef="USD">3543000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028935Member"
      decimals="INF"
      id="h_2821_f819a5f1_ba39_4a36_9eb3_94fe50e8eb2a"
      unitRef="Holding">46</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028935Member"
      decimals="INF"
      id="h_2822_628cd000_b914_4efa_9b1b_59619fed5e00"
      unitRef="USD">23800000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028935Member"
      decimals="4"
      id="h_2823_ef6a6324_dbd6_4f5d_a177_ce391d22f026"
      unitRef="pure">0.45</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_19_c683d6cf_ad2a_a9a2_00b7_b1f0d046cd8f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;95.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;2.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Preferred Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_274326.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028935Member"
      id="t_20_918a7a49_49fb_fcb6_2c77_5d875b56aa01">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Taiwan Semiconductor Manufacturing Co Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teck Resources Ltd&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BAE Systems PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Liberty Media Corp-Liberty Formula One - Series C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;BNP Paribas SA&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.6&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_TaiwanSemiconductorManufacturingCoLtdMember"
      decimals="4"
      id="h_2824_366c27a1_b5aa_41f2_8cdd_84870a9a1f2f"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_TeckResourcesLtdMember"
      decimals="4"
      id="h_2825_34585df8_23f2_4104_af43_ae110b4f5b0c"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_BAESystemsPLCMember"
      decimals="4"
      id="h_2826_86bba6d2_a323_4bdf_bf83_c98dd560037a"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_LibertyMediaCorpLibertyFormulaOneSeriesCMember"
      decimals="4"
      id="h_2827_50945435_fb14_421c_89e5_070937eb5f30"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_BNPParibasSAMember"
      decimals="4"
      id="h_2828_4bec836f_2207_46c9_b3d3_2497af9c5244"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_CommonStockMember"
      decimals="4"
      id="h_2829_a9d0727c_41e2_40a3_9eab_e5008a0bf9c8"
      unitRef="pure">0.957</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2830_c721da25_4436_40d2_91a7_89cce2f0bd1d"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_PreferredStockMember"
      decimals="4"
      id="h_2831_0e33d650_2283_4dca_b096_28448e760305"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2832_9eb6b1b0_181d_48d0_838a_4c46655d86b2"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028935Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2833_1338533d_02bb_44a1_a27e_984f02f13c26"
      unitRef="pure">-0.002</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077669Member"
      id="t_1_f9b2a8e7_d35f_06d6_d734_abcff176260f">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077669Member"
      id="t_2_c9ce5044_c4f4_45f5_6930_4fe2e1ecf25f">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077669Member"
      id="t_3_a504ff33_3233_5987_d5ce_54b893b90e84">JRAAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_5_2894b758_1640_db59_cfa7_b06425f55603">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077669Member"
      id="t_4_16130f4d_739c_30ea_b5fe_c6d3a1bd2c58">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_6_0a92d6ce_bba2_8380_07fe_65ca3de78113">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077669Member"
      id="t_7_68914c04_77c0_df29_6b92_6210cea00b07">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077669Member"
      id="t_8_9892e2f6_35d1_e692_ecae_42553f05bd58">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_9_7ce3689c_2873_4d5a_acc1_5c1c12cf1f8e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class A Shares/JRAAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;106&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077669Member"
      decimals="INF"
      id="h_2834_e085e0f3_9836_4691_a02f_5326446b8346"
      unitRef="USD">106</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077669Member"
      decimals="4"
      id="h_2835_cccc437a_64f1_48b4_9674_6aa01f19d7a5"
      unitRef="pure">0.0086</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_25_7062af82_374a_413d_2859_187a98b51b62">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class A Shares returned 45.50%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_24_55be9a77_bb26_49d1_30d6_c25d80ee21f8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273458.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_11_b50ac2f7_e3bb_dcd8_cc68_5db9cf7c4dbf">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class A Shares/JRAAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;45.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.47&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class A Shares/JRAAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;37.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.3713</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      id="h_2845_e0e46c2f_5014_4801_8711_db1bed1c4f4f"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2846_eb1b7114_9603_40ac_92ba_973e4524e27a"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      id="h_2848_341f9e24_70c2_440b_9b8e_c77e990eb193"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2849_6f15e60c_591b_4629_b1be_d35c67ac7fd0"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2850_25665cdc_2763_4606_9b78_2164186c0388"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077669Member"
      id="t_17_4638eab0_dea3_abde_2aff_0637d1e3ea3b">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_18_10f46fce_68f4_b9fb_ee65_98306b36d284">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_19_3dd86042_83c6_3201_1404_6e810e116cd1">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_20_536a4c1f_529c_6b3f_f683_3a53d5108280">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077669Member"
      decimals="INF"
      id="h_2851_6c2c581e_757a_4b76_8d2a_9f3a7db1cbba"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077669Member"
      decimals="INF"
      id="h_2852_e96f2ca2_0f42_4ef7_9b40_d2d6f4ea452a"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077669Member"
      decimals="INF"
      id="h_2853_db3849a8_616a_4b34_81e6_387ba364e418"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077669Member"
      decimals="4"
      id="h_2854_387e13bb_5953_471d_8cbf_1f03d11cad7e"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_21_95c50694_aa4a_b5ad_952a_cbd38200b535">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273468.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077669Member"
      id="t_22_c8444fa3_9791_2c8d_e867_10151e3f7ee0">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_2859_09ca3e9d_1498_4101_95c1_8e9645d29fcc"
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      id="h_2860_aee279ff_c8f0_43aa_8217_0eea32867b24"
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      id="h_2863_e05cea93_ba62_4410_8354_3becbc46a922"
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    <oef:FundName
      contextRef="FY2024_C000077670Member"
      id="t_1_355653d3_d476_8976_6daa_066abaa2aa8f">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077670Member"
      id="t_2_174e6328_d076_f4d8_9bfd_020f5c2e2b54">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077670Member"
      id="t_3_5cfd9c23_a30c_fe44_12b5_e2d2b5c81d29">JRACX</dei:TradingSymbol>
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      contextRef="FY2024_C000077670Member"
      id="t_5_9f66a2a4_7e0a_35c5_36b6_af84b2617e2d">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077670Member"
      id="t_4_d7af794d_618e_9bdd_0a61_f7afb98f402e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_6_1e5f0b38_feff_ff96_c67b_9373ccd2614d">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077670Member"
      id="t_7_ef2e3147_73ac_bb42_e205_8cd38e65b256">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077670Member"
      id="t_8_d442cd48_a4af_17b7_cfe3_51baed0c6000">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_10_ef76a1a6_5f16_9c16_111c_7b643c9a5b81">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class C Shares/JRACX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;171&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077670Member"
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      id="h_2865_0e2367e6_b354_44d0_bbc5_220a04acbf5d"
      unitRef="USD">171</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077670Member"
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      id="h_2866_3dad87c0_d98c_4950_8709_92b059addb18"
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_28_adc63aeb_e833_ccd6_7a99_1d1e923aa5ce">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class C Shares returned 44.73%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273497.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_12_fbe9d8d6_8825_c9a8_94ea_cb8fe79c8862">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class C Shares/JRACX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;44.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class C Shares/JRACX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;43.73&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      id="h_2868_8ecafa25_ac6c_40ad_97f0_cda6136533b8"
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      id="h_2869_5fedc0aa_3205_4858_bb80_132f70e2d13e"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.1665</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="t_18_3d29a522_f9bf_acc9_2e0e_24cf09f954fa">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_2873_edd0a01d_568f_4d62_882e_6b5574e3e325"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000IndexMember"
      decimals="4"
      id="h_2874_56736579_de33_4740_beb4_83ee17ca74e5"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_2875_b72b7660_de7d_490d_9ae7_57147ff0c185"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_19_f1ddb48e_617e_e072_e3d7_0dfa16a96ec7">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2876_2f74ac0f_e358_432a_ac50_c66a411e223a"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2877_29307dc1_82f4_45c9_ac98_3a4162b747ab"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2878_c8ef2dd6_65e9_45a7_ad57_fdb2fa649a22"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      id="t_20_119e2a71_3bfa_33d8_c6ce_c6cb44fce392">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2879_33d6c877_cb46_4e80_abb0_7a1558513fe3"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2880_91641274_bfa6_4d77_a3a7_dd565df97681"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2881_d81ac60a_12e8_4d68_bc06_cc786fb5c92e"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077670Member"
      id="t_13_0fcc7798_1872_060d_f485_26269ac58cc6">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_14_7800e93c_817a_0a84_cfd3_496c04ca00ea">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_15_4bfd44ac_25f5_0633_158c_d68b05d5362b">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_21_a9a99919_c2c1_9c51_fca8_99581a75da32">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077670Member"
      decimals="INF"
      id="h_2882_c7f44fa6_5458_4d3f_8122_70450bdc0d0b"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077670Member"
      decimals="INF"
      id="h_2883_e676cd17_ca0d_4bcf_a1fb_fddb27f1acd3"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077670Member"
      decimals="INF"
      id="h_2884_38588861_166a_451e_9327_0d74c12a49f4"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077670Member"
      decimals="4"
      id="h_2885_7efdc534_6707_4731_a2bb_6e4078ef7957"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_22_2c508945_08f1_5e3a_860b_79ac5a2f7755">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273507.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_23_bd5e7819_b597_cb73_d98e_7a2d7bc15512">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_NVIDIACorpMember"
      decimals="4"
      id="h_2886_cb2ecb12_ed05_4939_95d0_6eb6503f523b"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2887_0b8749a0_68b2_4495_af90_4144ed47acca"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_AppleIncMember"
      decimals="4"
      id="h_2888_f2d1eb52_bfff_4247_9aa4_eab19ff5289b"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_2889_7a4c6d63_7863_40c9_8f19_afe14f2c59e5"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_AmazonComIncMember"
      decimals="4"
      id="h_2890_0694dc3c_efa2_49f9_8a2d_7db24720f0e1"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_CommonStockMember"
      decimals="4"
      id="h_2891_2e1f2b51_756f_4fd4_bdde_6ead0c690d8f"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2892_d94fad2b_bc82_4eba_ab09_f456d9f6ce4f"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2893_cdd6ee35_d0ab_4aad_91f6_cb27f6472c69"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2894_38d33880_8681_46da_a6d1_84b201fca94e"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077670Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2895_e736534a_2f91_4cf3_bfed_534b98aae365"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077670Member"
      id="t_24_6b283eeb_201a_d2a6_924d_6b0379e3d401">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to a decrease in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index.&lt;/div&gt;
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      id="t_1_bdd11864_f824_c716_47a1_1a8f01cbcdd0">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_a45f9305_6556_6a2d_26eb_cc80a32b7be5">Class D Shares</oef:ClassName>
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      contextRef="FY2024_C000083517Member"
      id="t_3_814ae32b_f40c_1f4c_8de0_da0f41accb2e">JNRFX</dei:TradingSymbol>
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      contextRef="FY2024_C000083517Member"
      id="t_4_9e688336_2f40_c5d6_fdfc_406dac18a164">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
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      id="t_5_d8ad7342_396d_abea_7927_5ec1845b1421">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000083517Member"
      id="t_6_1a4fbd9b_7fde_7ba0_f340_e8894dbc8d02">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083517Member"
      id="t_7_fe8898d0_9738_4245_6f13_cf9e644c69db">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
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      id="t_8_3c5ce698_01c2_e381_a085_17971807db61">1-800-525-3713</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class D Shares/JNRFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;82&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:ExpensesPaidAmt
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      id="h_2896_19fb402b_0d04_4ad5_b2b9_feb3d7f71f44"
      unitRef="USD">82</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083517Member"
      decimals="4"
      id="h_2897_d886a789_1989_484e_b6fa_d5abc28c11f2"
      unitRef="pure">0.0067</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083517Member"
      id="t_25_eb167a6e_15ab_7f00_b443_e8a728f59aed">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class D Shares returned 45.78%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273536.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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    <oef:AvgAnnlRtrTableTextBlock
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class D Shares/JNRFX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;45.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_2898_26cfc6ab_abac_4248_82c3_bbcc178fb6da"
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    <oef:AvgAnnlRtrPct
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      id="h_2901_68f9e84d_9f1b_4d1f_9053_175423f1f86f"
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    <oef:AvgAnnlRtrPct
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      id="h_2902_60426a21_ac36_481e_aef3_4f3d23d1be80"
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    <oef:AvgAnnlRtrPct
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      id="h_2903_04b95e97_2d43_4fc7_a4f1_f66f5ac053e8"
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    <oef:AvgAnnlRtrPct
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      id="h_2904_b194ec3a_902c_4417_b5e0_6506d3eedae7"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2905_8461aaa6_05e4_400a_a696_f81647670b21"
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2907_d1b7e1c2_6192_4c1f_9492_331538bf7830"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2908_de933f1e_d558_4a54_8cad_09d45a9e364d"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2909_e5cc1667_ce7a_49b7_8f9a_be869509ea6e"
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      id="t_13_8eb291fe_0c25_038f_59d8_95d7dd619c3d">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083517Member"
      id="t_14_cd53219a_afa6_6b4f_eb2a_191af2b40f16">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000083517Member"
      id="t_15_95ab39a8_fb87_bbb3_4ab2_63aa8d919ec8">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083517Member"
      decimals="INF"
      id="h_2910_a3329be2_201f_46d9_bd61_56ffc04faa78"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083517Member"
      decimals="INF"
      id="h_2911_b3ef7c3b_7d29_407f_b4bd_be11d4aa6bcc"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083517Member"
      decimals="INF"
      id="h_2912_6fd418a7_4711_49af_b17e_bf3e1b681a46"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083517Member"
      decimals="4"
      id="h_2913_a13c78f0_aa71_4f0e_a40b_e3e651a51ed9"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083517Member"
      id="t_17_b286d554_f1e6_e41c_8982_3173afecfea5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273546.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083517Member"
      id="t_18_0c5dcfd1_e483_e057_a3d4_4f290cb72966">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_NVIDIACorpMember"
      decimals="4"
      id="h_2914_65656f66_ade6_461e_a670_ce127cee82bd"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2915_b7edec4c_563b_4a75_ba51_48a3be1ff72e"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_AppleIncMember"
      decimals="4"
      id="h_2916_f38f0a12_613e_4352_81b8_5378bcfed443"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_2917_54562a50_6a93_4ddc_b526_dddd03919a40"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_AmazonComIncMember"
      decimals="4"
      id="h_2918_95ad6e0e_77fd_41f1_b09e_2d9be03cba50"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_CommonStockMember"
      decimals="4"
      id="h_2919_97d3b380_5557_41f3_9c70_c71bd2e77bd1"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2920_6314473e_d9a8_4b12_8995_88b16477fab1"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2921_fb2a5b65_12a0_4fb9_9131_1710931ed70f"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2922_419fd4a0_e2a8_4f21_b42d_6be74891456e"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083517Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2923_15f52c0c_eb71_4129_b1dc_050a9973d09a"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077671Member"
      id="t_1_3fcf163c_be26_d1e3_295f_9377bdbbdd59">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077671Member"
      id="t_2_0640b7ae_10b3_f24e_f88b_2e17bcc0905f">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077671Member"
      id="t_3_3bd6125b_b36e_d0ae_2799_f30a657ccac2">JRAIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_4_319f685b_9a78_256b_b31d_bda0979b77fd">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077671Member"
      id="t_5_21d41986_cd59_a2fd_6b56_3c611f2d3346">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_6_a52ac61f_bb78_b407_9a3c_b411de1c3210">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077671Member"
      id="t_7_2d888f4d_9977_58a1_a237_ce62d7158e8d">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077671Member"
      id="t_8_76a94d61_97c8_ff74_b983_86bf9047d0ed">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_9_f9bf3f2d_116e_5ce5_3822_6205daaca50b">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_27_e693307f_8962_bc6a_e5f6_70a09322b67f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class I Shares/JRAIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;79&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077671Member"
      decimals="INF"
      id="h_2924_42ae52e7_07fb_4dcd_828e_0b049ea9515f"
      unitRef="USD">79</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077671Member"
      decimals="4"
      id="h_2925_41646b9d_b9e0_49ed_bbf6_21877b735a5f"
      unitRef="pure">0.0064</oef:ExpenseRatioPct>
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      id="t_30_9a7aa91e_eb20_a8fc_4536_ca58490a4e84">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class I Shares returned 45.83%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273575.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class I Shares/JRAIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;45.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4583</oef:AvgAnnlRtrPct>
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      id="h_2927_e98ad07b_2e94_460a_95f7_69ad9bf63135"
      unitRef="pure">0.1775</oef:AvgAnnlRtrPct>
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      id="h_2929_7bda72aa_45b2_466e_8e9d_61cc22e84a49"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
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      id="h_2931_db290262_79dd_4d0c_812d_b2ad154d74b9"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_25_95224580_6885_f26d_82e9_c44f48358b77">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2932_3804d80f_ffb8_4060_9ff8_96fa01ba4825"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2933_1267e770_e78b_440e_8239_9d43fac89b11"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
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      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      id="t_26_09e748af_ac39_f210_c9b6_effd5976ac35">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2935_0cd24a43_90fe_4ae4_920b_fb9ddc2df503"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2936_5f60cc93_9c29_4f19_8154_ae44bc610b4a"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
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      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000077671Member"
      id="t_14_38df95b5_0686_d9b4_ada8_8e166890f930">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_15_8b598a2a_daf1_3166_cf42_8c51641284ad">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_16_f502d5bb_bc72_8d63_219e_cb22fb6eeb82">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      id="t_17_de8daffb_abc7_ece3_a2cd_2b1ed2b7ef76">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_2938_de889624_34ab_44cd_8ad4_5540869b23f2"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077671Member"
      decimals="INF"
      id="h_2939_70b574b7_a29b_4f9d_8def_94407bbb27e7"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_2940_c445941f_f473_41f3_97bd_97e87e1bec19"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077671Member"
      decimals="4"
      id="h_2941_be49f790_f7fd_4ca7_9cf7_375726417af4"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
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      id="t_18_fccc9eb5_835e_674d_a907_31d020e25b9c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273585.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_19_9fada6a2_ca4c_3b4d_8df6_62590a20aa76">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_NVIDIACorpMember"
      decimals="4"
      id="h_2942_79b438e0_bc5a_48f2_9e7b_24a51c6515f3"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2943_2bc68672_b1cb_4641_b472_8dc5fbd44b30"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_AppleIncMember"
      decimals="4"
      id="h_2944_a9952320_9f2d_42c3_b8d5_783dd0be53ba"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_2945_b2983704_13d6_4ab1_8351_2d1283cd910b"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_AmazonComIncMember"
      decimals="4"
      id="h_2946_1865b7fa_1067_45da_bca1_818b833901f7"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_CommonStockMember"
      decimals="4"
      id="h_2947_831995b5_f275_4f5d_b2d9_01f09b56d6ff"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2948_75a48dc4_bd54_498c_b532_f7f9690e460d"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2949_e46505f6_40eb_42ae_8333_226e29a6f130"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2950_d6687819_2c3f_44ba_81ff_b162ecd8dd62"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077671Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2951_18ee72fd_ab85_4a03_afab_f08491fa3c44"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_21_7fd960d6_d560_71a3_90b4_859808f4ed61">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index.&lt;/div&gt;
</oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="FY2024_C000077671Member"
      id="t_20_bff4b244_4a86_3795_2380_d0217db89a0e">

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index.&lt;/div&gt;

</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000114872Member"
      id="t_1_c2f69f32_07ca_cda8_b964_a476d7f573b5">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114872Member"
      id="t_2_95721d7c_bbdb_7e9f_e083_ed4ece4de84d">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114872Member"
      id="t_3_74fa46d1_0454_ac06_117f_60699d27a476">JRANX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_4_6ae03cda_7368_35d2_b319_5f27e80bfbee">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114872Member"
      id="t_5_76c8e497_8763_7e5b_39ab_ae86c43c59af">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_6_41845155_0027_4b9c_fb6c_0af2ca9cf16b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114872Member"
      id="t_7_a2503e31_524c_9a05_1ba0_469cfd9a8095">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114872Member"
      id="t_8_01032e71_dd97_81c5_1696_00828e687c99">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_9_a8b869d6_510c_4bd1_062d_f824ed274c53">
&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; font-weight: bold;" title="oef:MaterialFundChngNoticeTextBlock"&gt;This report describes changes to the Fund that occurred during the reporting period.&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_10_6844abb8_0d4f_832b_b1a6_c2c546b672bf">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class N Shares/JRANX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114872Member"
      decimals="INF"
      id="h_2952_cd80c480_a8d4_4b02_9214_b1c3a5bfe0af"
      unitRef="USD">68</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114872Member"
      decimals="4"
      id="h_2953_a7b209f3_0ae3_4c1e_b02a_954d8fe75c90"
      unitRef="pure">0.0055</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_29_2b64d952_0eaa_c56f_6479_e5046e3e2c77">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class N Shares returned 45.95%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_28_18f3291d_e7d4_0a6b_1696_5f1e357ced3a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273614.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_13_cecb3cd4_e841_011a_050c_ee5c833a2de2">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class N Shares/JRANX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;45.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="t_26_24eb7d83_d91c_0474_1ffa_0016349eec4f">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
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      id="h_2963_f8f4f91a_17b0_46cb_9341_fc271d416c0d"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
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      id="h_2964_661ffe66_54a3_4c96_8fcf_075ebfb76503"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000114872Member"
      id="t_14_30a3388e_082f_03e2_8ada_95e3e55d5bde">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_15_d302f7c7_82a8_9e07_926d_ed4316c34ece">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000114872Member"
      id="t_16_2a4fa73a_785c_2aa9_3751_cebdfb0babf1">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_17_75d116dd_27fe_0b00_c675_0f0576733c40">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114872Member"
      decimals="INF"
      id="h_2966_f9a76cee_4844_4501_9821_45596f52af97"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114872Member"
      decimals="INF"
      id="h_2967_1bbb92de_b277_4cbd_8459_3d5eb04ad566"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114872Member"
      decimals="INF"
      id="h_2968_59f2b243_44eb_423f_8c73_3a9381a38139"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114872Member"
      decimals="4"
      id="h_2969_6b608067_2d30_465a_be85_2d9afba2790f"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_18_10e42498_8654_1cb7_d8bc_b877c32a56c4">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273624.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_19_d6a41c36_09d7_f579_3beb_3eac20e8e04e">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
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      decimals="4"
      id="h_2970_050f02a3_6eb4_461c_9a1e_d00ee1f2ce5f"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2971_82e48085_6bf8_4dd4_a21a_55da3c923017"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_AppleIncMember"
      decimals="4"
      id="h_2972_01ebd3c5_e188_4f05_99ee_2f1cd2b79587"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_2973_fa2ef3a9_f62d_41b1_895e_076c963bbd72"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_AmazonComIncMember"
      decimals="4"
      id="h_2974_1b6e316b_a552_4679_948d_a5d2af99ad50"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_CommonStockMember"
      decimals="4"
      id="h_2975_470612c4_1271_44bf_95fe_1afb4bf0948e"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_2976_36c47abf_5014_4a65_ad0d_31d2619dffcd"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_2977_d98deee9_6dfd_4021_8b94_700302f2e8dd"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_PrivatePlacementsMember"
      decimals="4"
      id="h_2978_4c5df5be_45af_41bc_a3a9_21747257eb77"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114872Member_OtherInvestmentsMember"
      decimals="4"
      id="h_2979_4a8f9d6a_3079_4e12_8586_d642c7f75918"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="FY2024_C000114872Member"
      id="t_20_7a825ded_8aa6_e602_d055_16d989a6a3ab">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 20pt;"&gt;What material changes have occurred since the beginning of the fiscal year?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;This is a summary of certain changes of the Fund since September 30, 2023.&lt;/div&gt;


&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index.&lt;/div&gt;

</oef:MaterialFundChngTextBlock>
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      contextRef="FY2024_C000114872Member"
      id="t_22_83e5d3a0_6b42_90bd_1978_b55293b7d660">
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 7.5pt;"&gt;The Fund&#x2019;s net expense ratio materially changed from the prior fiscal&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year due to an increase in the Fund&#x2019;s advisory fee rate, which adjusts up or down based on the Fund&#x2019;s performance relative to the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:FundName
      contextRef="FY2024_C000177053Member"
      id="t_1_d2844483_8455_24b9_a78b_f4ce78fb4607">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000177053Member"
      id="t_2_6b635d3f_c73e_d58c_d945_febb8cef6e47">Class R Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000177053Member"
      id="t_3_d79ccb16_afac_48b5_0d63_0c3ac1ab76ef">JRARX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_5_7db07eb4_27d4_b359_cd94_881fad88c494">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000177053Member"
      id="t_4_0ce7d50b_abc7_d1e3_70b0_c982ab687663">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_6_8613bdda_a5f8_ae56_1609_3a5dd13a4e08">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000177053Member"
      id="t_20_b85950f3_6035_79b9_236b_44f1935a679f">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000177053Member"
      id="t_21_73d0394b_024b_2aba_433b_6ab7d94e1133">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000177053Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class R Shares/JRARX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;158&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.29&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000177053Member"
      decimals="INF"
      id="h_2980_ae86647a_b06c_47cc_a2e7_a34baecae27a"
      unitRef="USD">158</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000177053Member"
      decimals="4"
      id="h_2981_e0e07040_f296_437f_8756_926311d90797"
      unitRef="pure">0.0129</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_24_85fa1d29_bcd4_d9fa_0130_4e63e93a506a">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class R Shares returned 44.87%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273653.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_9_bd82dc2c_ea35_bceb_cbd9_beab5d1a77d3">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class R Shares/JRARX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;44.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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      id="t_16_be39b354_0502_9d68_5757_54e7af8c214f">Janus Henderson Research Fund (Class R Shares/JRARX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_2982_08d93aa8_5199_4d1e_9d87_adf4d7e05227"
      unitRef="pure">0.4487</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000177053Member"
      decimals="4"
      id="h_2983_a5af7ea6_8418_434b_9a54_65dc2708a2dd"
      unitRef="pure">0.1694</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000177053Member"
      decimals="4"
      id="h_2984_2bbf270e_1400_42fd_a643_eb7c6dd2c55b"
      unitRef="pure">0.1391</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000IndexMember"
      id="t_17_48b459b2_4018_6d5d_8269_ac1957624313">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_2985_0a2818c1_de68_4ede_9a12_ef25418bb90e"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_Russell1000IndexMember"
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      id="h_2986_749700c4_5038_4f0c_b969_9f5320ea57e4"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_2987_298175fc_6bd2_4a23_969e_f97f58229a82"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_18_6ee705cc_4a34_97a0_463e_adff2572d364">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2988_e8fad76b_fd0e_4b0c_8511_7d1d4d049efb"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2989_05131be3_7cc8_4a40_83d4_2754f8c3e448"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_2990_a6f6007a_1e16_442a_90e9_9a655b3c6691"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      id="t_19_e49bacf1_ec36_468b_0a75_967d3e3794e9">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2991_d60e0850_362d_4ee2_a630_6ae511b4787c"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2992_81c61068_02a7_4fed_9062_608a0236415d"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_2993_cb3e42e9_3f13_4337_9f83_d627b7181056"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000177053Member"
      id="t_10_d4de03ca_b692_84b9_8aa9_92a57d865108">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_11_63cfb077_7dc0_d117_d443_1c59bbcb5ca2">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_12_ccb7c15c_dab5_a18a_0b8f_2951e6d0bcf9">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_13_a557d934_d89c_836b_b7d8_055df10ac874">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000177053Member"
      decimals="INF"
      id="h_2994_5dde0854_46ea_4d03_84f4_259d1407d60a"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000177053Member"
      decimals="INF"
      id="h_2995_87405f14_d30a_4303_a39b_b2d0b9c1cf2f"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000177053Member"
      decimals="INF"
      id="h_2996_20e8a913_3a24_4d7a_83cd_137e5785ae85"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000177053Member"
      decimals="4"
      id="h_2997_3d130341_0532_4236_af23_ebdb5172aa9b"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_14_ebe2657e_1af3_a26c_828e_81a2c02de3cc">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273663.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000177053Member"
      id="t_15_deabf54e_ac80_5744_d811_0eb67b9c8303">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_NVIDIACorpMember"
      decimals="4"
      id="h_2998_513ded86_87e7_4570_98aa_421b555695eb"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_MicrosoftCorpMember"
      decimals="4"
      id="h_2999_78c54f32_a828_45e7_ab70_cb4329da19db"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_AppleIncMember"
      decimals="4"
      id="h_3000_afc624e0_b8eb_417f_ac8e_2a6892c4fd4a"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_3001_b3050d60_057c_4ea5_a7cd_5dc9ac668e0f"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_AmazonComIncMember"
      decimals="4"
      id="h_3002_5e3304ec_d267_44db_a6b0_5a853ec1568d"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_CommonStockMember"
      decimals="4"
      id="h_3003_ad9b9151_e744_42e3_bec7_d831a080ed31"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3004_b1298284_6677_472a_9513_4c7657ecb7fd"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3005_f52c3f3d_ccaa_41c0_9df8_1959828c31b2"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3006_7ed7094e_6e6b_46cc_9687_c3cc0ae8938b"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000177053Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3007_72c3c6d7_db57_4b6c_b74d_f2b3ffbd5033"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077672Member"
      id="t_1_d4d6145b_f01b_d11b_5b6e_1729efa344ae">Janus Henderson Research Fund</oef:FundName>
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      id="t_2_00793eac_c073_70fa_bbef_f04192f2bbd4">Class S Shares</oef:ClassName>
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      contextRef="FY2024_C000077672Member"
      id="t_5_16733a3a_80fa_9d9a_27fd_2de6cac44b16">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077672Member"
      id="t_4_c4be3871_da64_bc95_d102_572351b3adb6">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000077672Member"
      id="t_6_7d7a658b_0379_57c5_894b_0757b3bab4dc">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077672Member"
      id="t_20_781bcd25_2f8a_d691_4687_b9aa0e25ed93">janushenderson.com/info</oef:AddlInfoWebsite>
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      id="t_21_1e519ba9_d15b_23cf_a76f_1a916f28c01d">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class S Shares/JRASX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;130&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_3008_eab7ebb3_e026_47d2_9693_368b406690e5"
      unitRef="USD">130</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077672Member"
      decimals="4"
      id="h_3009_81f6df7a_1442_46b5_ace1_63bbe5cde63e"
      unitRef="pure">0.0106</oef:ExpenseRatioPct>
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      contextRef="FY2024_C000077672Member"
      id="t_24_6c8ce7b6_b6ee_e6a8_11aa_2faa306f8c26">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class S Shares returned 45.21%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273692.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077672Member"
      id="t_9_8af08e9c_8a2e_8da9_75bb_39eb38ec9dbd">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class S Shares/JRASX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;45.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.4521</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3015_ef463895_5221_4d33_b363_77913aba2d08"
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      contextRef="FY2024_Russell1000GrowthIndexMember"
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      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
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      id="h_3017_c7a8d9cc_1184_4b72_b70a_b6de225540d3"
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    <oef:AvgAnnlRtrPct
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      id="t_19_9f2e2a97_398e_4559_4a9c_d97b77122ba1">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3019_42e1aa24_e153_4470_b97a_a3b09d9c08f2"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3020_39079b64_45a9_4d78_9dd0_68049dd7d2ad"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
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    <oef:PerformancePastDoesNotIndicateFuture
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      id="t_10_dc9a957a_6f96_9b12_9260_425fbe8a706b">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077672Member"
      id="t_11_509b6b74_8e15_4a03_0fff_99316c54b07e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000077672Member"
      id="t_12_a8350178_d508_8c06_0ca7_e63d57b0e066">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      id="t_13_5760ddd4_336b_82b8_e606_55bc509303a2">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
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      id="h_3022_2b56226f_dbe7_4bb5_beb6_577b8d66dff0"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077672Member"
      decimals="INF"
      id="h_3023_2459ac9e_4ebd_4c2f_9bb8_1b20c4f888e0"
      unitRef="Holding">85</oef:HoldingsCount>
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      decimals="INF"
      id="h_3024_c531f89c_3737_475d_8314_7121750e71c8"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077672Member"
      decimals="4"
      id="h_3025_1560cb8f_b153_44fb_a85a_b9738df548f5"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273702.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077672Member"
      id="t_15_c9b962c5_d5bd_d08b_0d27_c0b11e3d1e3d">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_NVIDIACorpMember"
      decimals="4"
      id="h_3026_11e6ce36_9896_4b40_a57a_c30e4c78baf4"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_MicrosoftCorpMember"
      decimals="4"
      id="h_3027_dcc02a46_9c8c_4b4d_85a4_94d134fe1bac"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_AppleIncMember"
      decimals="4"
      id="h_3028_ec84a24d_dcda_4d81_a833_d20783cf984f"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_3029_d212d16b_3af3_4b92_9d38_7e26443c6a6d"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_AmazonComIncMember"
      decimals="4"
      id="h_3030_f21f7572_be78_4325_993a_92e7a5e1a97d"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_CommonStockMember"
      decimals="4"
      id="h_3031_ea705433_4ac0_451f_9d0d_66252c870828"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3032_35c9ac87_56b6_4c46_8747_e9b86b33814b"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3033_3282b2f0_5f33_4d5b_8cd6_403ee9675e0b"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3034_eb3fdb9f_17f9_43b4_89b7_451628b8aa58"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077672Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3035_f3078844_9bea_4a34_99f0_f794d7b87b9a"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028926Member"
      id="t_1_e91febc5_02cf_709e_41a6_6a6acb8f0376">Janus Henderson Research Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028926Member"
      id="t_2_8b239c4d_6d4b_66c7_e8e3_545fa778b461">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028926Member"
      id="t_3_3e58c18b_4884_909b_d3d9_8a4eadcded6a">JAMRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_5_2f9e3b5c_8cb8_8882_732d_f9667798a5ce">This annual shareholder report contains important information about the Janus Henderson Research Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028926Member"
      id="t_4_8d83b367_6ad8_c678_af9f_5b4d91607e04">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_6_37c75588_23e9_e2b0_9b71_581e8d9b16cb">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028926Member"
      id="t_7_518e147c_3ca7_98c8_6be1_86b4d94cb66b">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028926Member"
      id="t_8_24f0458a_acb1_145f_04f2_18888f1f4c34">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_9_bd1bd402_9bc5_d77f_14d2_880bcd47b3e9">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund&lt;br/&gt;(Class T Shares/JAMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;96&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028926Member"
      decimals="INF"
      id="h_3036_dd493037_a1ef_435f_b074_fc9dfb9993c0"
      unitRef="USD">96</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028926Member"
      decimals="4"
      id="h_3037_f13b9aa2_2c09_4047_bfed_803de0e37eb7"
      unitRef="pure">0.0078</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_24_7450a9a2_ad7e_41e9_5119_e531919f42b5">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Research Fund Class T Shares returned 45.64%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 42.19%. Its additional benchmark, the S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 36.35%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;NVIDIA was a top contributor to returns relative to the performance benchmark. The graphics chip company reported strong earnings growth supported by robust demand for data center graphics processor units used in generative artificial intelligence. Aircraft component manufacturer Howmet Aerospace was another contributor, as it delivered several quarters of strong profits growth that surpassed expectations.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Electric vehicle (EV) manufacturer Rivian Automotive detracted from returns relative to the performance benchmark, as slower EV sales and market share declines hurt its financial performance. We exited the position during the period. Real estate analytics company CoStar Group also detracted, as higher interest rates pressured its commercial real estate business through the first half of the 2024.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273731.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Research Fund (Class T Shares/JAMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;45.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;17.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;14.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;42.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;19.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;S&amp;amp;P 500&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;36.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;13.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      id="h_3038_72530234_0df2_42cc_84db_d5090d264efa"
      unitRef="pure">0.4564</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_C000028926Member"
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      id="h_3039_83e7cf99_88cb_4c5a_a5c5_1ae5623971e7"
      unitRef="pure">0.1758</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.1441</oef:AvgAnnlRtrPct>
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      id="h_3041_0c60df80_3ebe_4af0_a142_83080970b009"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2024_Russell1000IndexMember"
      decimals="4"
      id="h_3042_0812ec19_d460_402e_81be_0f65038b7746"
      unitRef="pure">0.1564</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000IndexMember"
      decimals="4"
      id="h_3043_7c9e882f_99c6_40a2_ada3_a15a093e9a33"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000GrowthIndexMember"
      id="t_20_4d6aaa06_210a_38c2_266e_c1a5c13a7116">Russell 1000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_3044_e71cba0a_ff83_4868_8666_edfdc8f99f24"
      unitRef="pure">0.4219</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_3045_6fb83061_795b_4798_a853_955e4d8225dd"
      unitRef="pure">0.1974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell1000GrowthIndexMember"
      decimals="4"
      id="h_3046_a5dc6686_d4be_4876_ba05_0a9196a314b3"
      unitRef="pure">0.1652</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      id="t_21_837c5d12_7009_db1b_55dc_b35c46ba4f4e">S&amp;P 500&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_3047_6fe1ccf4_e67f_489a_941f_d81964ca4efb"
      unitRef="pure">0.3635</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_3048_17ed711d_d015_4bb2_ac87_e94768f7c285"
      unitRef="pure">0.1598</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_StandardAndPoors500S000010470IndexMember"
      decimals="4"
      id="h_3049_a30a64c6_1ebf_43c8_a416_3692dcba01eb"
      unitRef="pure">0.1338</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028926Member"
      id="t_12_ee48dbc6_cdd3_ba48_6d6e_3e41bc84f05e">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_13_8fffc2ce_2683_91ad_3018_0bcb9771507c">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_14_523d1657_32fb_2411_0136_3d4fcc687c5a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000028926Member"
      id="t_15_60ee1786_ae4c_0a5e_2ebe_deb63561f63f">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;23,814M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;85&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;111.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028926Member"
      decimals="INF"
      id="h_3050_5bf212cb_45af_40d5_8c99_f4e4bdd999f7"
      unitRef="USD">23814000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028926Member"
      decimals="INF"
      id="h_3051_3e0d530b_9024_4ae8_878c_50bc7af14f8e"
      unitRef="Holding">85</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028926Member"
      decimals="INF"
      id="h_3052_24c04ea5_cd94_4b26_80ea_71c15f6cef0f"
      unitRef="USD">111600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028926Member"
      decimals="4"
      id="h_3053_342b6321_4862_4e1e_854d_74dc62f3081e"
      unitRef="pure">0.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_16_7cb954a9_d222_aa9e_a7cd_dacd002a5f65">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;100.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273741.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028926Member"
      id="t_17_6ca283b6_9a0d_dd75_46dd_87c0cd17ac2a">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;NVIDIA Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;12.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Microsoft Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;11.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Apple Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Meta Platforms Inc - Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;6.3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Amazon.com Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;5.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_NVIDIACorpMember"
      decimals="4"
      id="h_3054_fc639b3c_bd17_4d30_8815_d4d2f6d25f0c"
      unitRef="pure">0.123</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_MicrosoftCorpMember"
      decimals="4"
      id="h_3055_d06c402c_2bde_4c75_846b_2275f014a01c"
      unitRef="pure">0.114</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_AppleIncMember"
      decimals="4"
      id="h_3056_e5095389_76f3_4898_b8a9_c2edcd0fd4f2"
      unitRef="pure">0.069</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_MetaPlatformsIncClassAMember"
      decimals="4"
      id="h_3057_713deec8_15cb_4bbc_a30d_a8dfd4cd8f15"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_AmazonComIncMember"
      decimals="4"
      id="h_3058_cee95a3e_3e66_42fe_b7a2_da8e17362ca6"
      unitRef="pure">0.057</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_CommonStockMember"
      decimals="4"
      id="h_3059_c0779cc4_bce3_4240_b661_3dbc981457ac"
      unitRef="pure">1.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3060_8a412440_db23_4ac1_b34d_786d56cb5422"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3061_4d1c3044_7449_4793_a9a6_541a03c761d8"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3062_06bc161f_3aaa_41e3_a3c7_0628ed97dd34"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028926Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3063_c0946079_87ad_4612_a86f_cf961e4ecfc3"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077722Member"
      id="t_1_720a7784_edcd_7601_7bf6_0a21ffded354">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077722Member"
      id="t_2_14bbf82f_f616_c52f_25df_6ad7bb176fd0">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077722Member"
      id="t_3_d8e6d6ba_c4b8_aa92_97be_7f5ce09a6893">JGMAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_4_a554bdbe_8193_a341_2a48_e4aadc139e81">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077722Member"
      id="t_5_877a896a_4194_af4f_5875_b31857d968b9">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_6_c6170ea4_4ec2_de2c_a200_db44962ca362">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077722Member"
      id="t_7_a5e857fb_381d_f3f1_38a2_1f57db94c68e">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077722Member"
      id="t_8_ae70c470_0c2a_83cd_089e_c9180c3eaa4e">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_9_f5e3145c_b564_7f35_1afb_d59fc960a655">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class A Shares/JGMAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;123&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077722Member"
      decimals="INF"
      id="h_3064_b4612444_2c30_45a3_bfc4_9f6dce80cafe"
      unitRef="USD">123</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077722Member"
      decimals="4"
      id="h_3065_1ab15bec_587c_4f9f_b0de_ae9395eeef79"
      unitRef="pure">0.0110</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_25_87aa9732_d0a0_75c5_fc86_779ac6a9b519">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class A Shares returned 23.06%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_24_f6b9d370_17a2_b22f_fb85_88895a22c9f1">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_272873.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_11_97d2052f_7758_e4f3_9265_203408748bfc">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class A Shares/JGMAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class A Shares/JGMAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;5.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="t_21_14cf9f24_b068_3d72_6b75_94f52e01d5d7">Janus Henderson Triton Fund (Class A Shares/JGMAX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_3066_b1a3b68f_298a_4a8e_8b2f_7cb782cb6881"
      unitRef="pure">0.2306</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077722Member_WithoutSalesLoadMember"
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      id="h_3067_9cc3cf3c_edfb_4bd9_926e_c9c50c89caa6"
      unitRef="pure">0.0695</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3068_c381c20f_b2d0_446d_9b3f_4ff368cfa873"
      unitRef="pure">0.0954</oef:AvgAnnlRtrPct>
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      id="t_22_8373fb96_609c_04a5_8876_3ca394a67acf">Janus Henderson Triton Fund (Class A Shares/JGMAX) at Maximum Offering Price - 5.75%</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3069_d89d9835_0175_4516_9512_e61f8a979a3a"
      unitRef="pure">0.1599</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3070_58ebe73c_97cd_4fc2_92f8_271bef63a59b"
      unitRef="pure">0.0569</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077722Member"
      decimals="4"
      id="h_3071_030ef911_41e7_4118_b41b_ad429021c19a"
      unitRef="pure">0.0889</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_20_3991455c_82b4_48e8_e0ff_c7af0620a1ae">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3072_13ae438d_5ccb_41f9_a00d_64fdacf921e0"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3073_420d0f2e_5049_41df_8473_e0ceb132402a"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3074_729c7b5d_af09_4bef_969b_fc5a9bcc7e00"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_18_35602863_e86d_d999_b858_dcd98726f43d">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3075_1c812201_5394_41f7_bbda_59f65ba151fa"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3076_a482a1e0_ce0c_41dc_8934_2c0822bcc88a"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3077_f5897831_2ac5_44f9_a72a_cff36226a4a0"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_19_e32fcb91_eeec_3bf5_96da_5d38a9e61958">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3078_7e68429c_14c7_4e2a_b4d2_5fe09c01b373"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3079_198537ea_a616_4e7a_ae23_3e7a8974e770"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3080_21313f97_f465_4ac4_a2e3_d34ff1213f7c"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077722Member"
      id="t_12_44659a51_d4b6_fbdc_3ae0_4b883e910b05">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_13_0920c088_3473_55c9_8e2c_edd32be67cc2">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_14_057c5c7e_a49f_a45f_a10e_30b7bc3be03c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_15_6b184929_aa10_8cbb_f987_98ee4292a56e">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077722Member"
      decimals="INF"
      id="h_3081_eeb43baf_74ce_47f4_ac70_eb85b895220c"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077722Member"
      decimals="INF"
      id="h_3082_ee8a6a61_9f4c_4944_b1c3_96952f1aea0a"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077722Member"
      decimals="INF"
      id="h_3083_31cc5f54_ab36_4e47_8afc_728d952d9cbe"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077722Member"
      decimals="4"
      id="h_3084_8babf126_d5e3_4021_ab7b_1945b92eb915"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_16_1d5acdca_4047_c9f7_904d_80cd19fcbcff">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_272883.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077722Member"
      id="t_17_2207b45f_3fa2_ab57_0824_518d9fc3e26d">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
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      id="h_3088_b0808b54_e372_4e79_ba15_ccfef6ccac64"
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      decimals="4"
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      id="h_3090_ba4f0846_c9be_498a_8787_4b8644a5696b"
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      id="h_3092_e7d8c783_9c8d_446c_91db_ef7979397404"
      unitRef="pure">0.007</oef:PctOfNav>
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      contextRef="TI20240930_C000077722Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3093_a013e79a_7c36_45b0_a30a_976db472da13"
      unitRef="pure">0.004</oef:PctOfNav>
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      id="h_3094_d740c98a_7120_438b_9558_69c613f3706d"
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      contextRef="TI20240930_C000077722Member_OtherInvestmentsMember"
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    <oef:FundName
      contextRef="FY2024_C000077723Member"
      id="t_1_5f0bde7f_f9f7_0048_ed29_47d5d5f53607">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077723Member"
      id="t_2_e1518709_8854_3e9a_ffaa_2b9353613f9f">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077723Member"
      id="t_3_eb76f5a3_ab1e_8935_53e7_3a89f7f458d4">JGMCX</dei:TradingSymbol>
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      contextRef="FY2024_C000077723Member"
      id="t_4_e5a9d5f8_b418_fcfa_71db_00c69ecde0d5">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077723Member"
      id="t_6_37130f30_553b_5e03_9083_f960cf772a61">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000077723Member"
      id="t_5_3c468e2d_a3c3_b030_f6da_4e96d27742e5">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077723Member"
      id="t_7_6c2c2637_5220_986d_a9e5_016ae3d7b419">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077723Member"
      id="t_8_723eefe7_5af2_0c08_f0a0_00e907e445af">1-877-335-2687</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000077723Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class C Shares/JGMCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;187&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077723Member"
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      id="h_3096_7a2ec8ef_794e_452a_961f_71e57edaa14d"
      unitRef="USD">187</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077723Member"
      decimals="4"
      id="h_3097_4a5ad5ec_5044_476f_be84_2fd34889cd33"
      unitRef="pure">0.0168</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_25_2838f70d_2126_d775_3b0d_1dbe24dc2dcd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class C Shares returned 22.39%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000077723Member"
      id="t_24_ddd6b700_69ba_7f30_ea5b_278cda36d365">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_272912.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_11_8ce0d081_5f42_c4c6_ff8a_52db41bc02dd">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class C Shares/JGMCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class C Shares/JGMCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;21.39&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077723Member_WithoutSalesLoadMember"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077723Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_3098_e4cceaed_ca83_49bf_8dbf_c97a1a7abfe0"
      unitRef="pure">0.2239</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077723Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_3099_9f3b3eed_b9f3_4d36_a7b3_fb3d300f4811"
      unitRef="pure">0.0639</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077723Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_3100_29c46dd7_1924_49ef_9eea_514b097e0f99"
      unitRef="pure">0.0892</oef:AvgAnnlRtrPct>
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      id="t_22_458391ad_e08c_1562_1bfb_ac5ba18f85f7">Janus Henderson Triton Fund (Class C Shares/JGMCX) with Contingent Deferred Sales Charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077723Member"
      decimals="4"
      id="h_3101_fd2970fe_7290_4ac4_94da_4969e5568204"
      unitRef="pure">0.2139</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077723Member"
      decimals="4"
      id="h_3102_965eaaef_fe10_4fa1_b7e0_c3ca02c8c97b"
      unitRef="pure">0.0639</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077723Member"
      decimals="4"
      id="h_3103_89762288_34c9_40ed_b180_17699c6557c9"
      unitRef="pure">0.0892</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_18_01273dd9_1e9c_15d7_1e6f_e8aab665e6c9">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3104_1e7bac34_989c_49ab_b41b_1c784125487d"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3105_e99cc415_f303_4db8_997d_f4f9bfa36e96"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3106_72ff8dc5_8332_499a_b585_282d853a4050"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_19_03734d16_991d_2969_2901_dce5585c7548">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3107_8dd934c0_5f79_42c2_8845_96dd32c4dda4"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3108_628bf97d_2188_4bad_b248_25d1313bfe95"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3109_87eacf8a_7718_4394_b3df_dd127038ded7"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_20_75a7f509_3a4a_b7c6_0af7_faa8a8855566">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3110_ce84f052_21f6_4d00_b98d_730c74cb1c6e"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3111_6e3265c6_5aed_45ce_9cd4_739fa289601a"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3112_821597dd_3fd3_4e87_90b6_06c794eb61ee"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077723Member"
      id="t_12_844ed9de_40fc_1c95_09dd_2396c21e479e">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_13_1161fb8f_d8b3_d12f_3774_53de1220fa50">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_14_a9fb64bd_3c41_4203_1251_7377a5a3a621">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_15_a2e44989_7a74_64e9_6b4e_6275e637021d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077723Member"
      decimals="INF"
      id="h_3113_1ea0286d_5032_4a3b_9fe5_b67bb1c5ad19"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077723Member"
      decimals="INF"
      id="h_3114_71e94a3a_9087_4323_82c5_8e057cda9f28"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077723Member"
      decimals="INF"
      id="h_3115_7a7b0e98_8194_4408_a051_3a9244896ee3"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077723Member"
      decimals="4"
      id="h_3116_2b133577_9c4e_48f3_9e3a_1bc68dd73bba"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_16_bd50f23e_c564_17e1_c83c_1d2d95661c30">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_272922.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077723Member"
      id="t_17_415cf4ab_d769_8f0d_1977_0eefc8cfd046">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3117_2057e5e3_db8e_4849_93a1_12c805c7df87"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_BlackbaudIncMember"
      decimals="4"
      id="h_3118_6b4d9bdc_15e4_493f_bc3a_62c03d41ed0e"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_TeledyneTechnologiesIncMember"
      decimals="4"
      id="h_3119_66aeba43_ccc1_4ac4_91d5_fbe2564f2251"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_CrownHoldingsIncMember"
      decimals="4"
      id="h_3120_ca135097_06d3_4e94_ad0a_8c46e86aa2aa"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_CboeGlobalMarketsIncMember"
      decimals="4"
      id="h_3121_90366da2_69a3_48d9_8667_18c7c9dd4d52"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_CommonStockMember"
      decimals="4"
      id="h_3122_a945e4d3_a05b_47bf_8ec7_f27359651e70"
      unitRef="pure">0.992</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3123_93d09c8c_27b3_4a6e_93ce_9000f3c0635b"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077723Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3124_5edc39c6_b81c_4ed8_8202_d9531ffb79fe"
      unitRef="pure">0.007</oef:PctOfNav>
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      contextRef="TI20240930_C000077723Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3125_5c72a30b_054d_4ac3_8159_a8e4d05df293"
      unitRef="pure">0.004</oef:PctOfNav>
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      contextRef="TI20240930_C000077723Member_WarrantsMember"
      decimals="4"
      id="h_3126_bfb478ac_319e_4dd8_8130_84e5960de0e3"
      unitRef="pure">0.000</oef:PctOfNav>
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      contextRef="TI20240930_C000077723Member_OtherInvestmentsMember"
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    <oef:FundName
      contextRef="FY2024_C000083530Member"
      id="t_1_36296819_40b3_d0b3_9f40_ce5f6b50f636">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083530Member"
      id="t_2_ff26860a_be22_af02_2fd8_50eecbda673f">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083530Member"
      id="t_3_9e554834_bc90_67c5_0f5b_53c314696187">JANIX</dei:TradingSymbol>
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      contextRef="FY2024_C000083530Member"
      id="t_4_94a04aba_32d9_6e0b_a799_83c29d92a815">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083530Member"
      id="t_5_3ca32758_0417_a220_b429_09bcec1a9932">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_6_c25e9fe8_0504_1539_e600_5ec99b14cebf">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083530Member"
      id="t_7_08e639a0_7a44_7fbf_cd32_ec7597bb647a">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083530Member"
      id="t_8_bc20a0a8_f15e_9c33_98dc_3a0aeada9fb7">1-800-525-3713</oef:AddlInfoPhoneNumber>
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      contextRef="FY2024_C000083530Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class D Shares/JANIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;88&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083530Member"
      decimals="INF"
      id="h_3128_15ad765c_20f7_4613_853f_dd578fbd180b"
      unitRef="USD">88</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083530Member"
      decimals="4"
      id="h_3129_e962d5fa_16df_4904_99f6_23af19c36a74"
      unitRef="pure">0.0079</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_25_3968ec8a_2eba_c8d5_ebcb_81bd9b696523">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class D Shares returned 23.44%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_272951.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_22_6c9c17aa_ff12_5c48_f52f_584228416a3f">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class D Shares/JANIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      id="h_3130_1aad7a62_0044_478f_822a_82989c358ceb"
      unitRef="pure">0.2344</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000083530Member"
      decimals="4"
      id="h_3131_f8da226a_47f6_4dcf_98bd_14788bfef9c9"
      unitRef="pure">0.0730</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3132_bce5ef27_10a3_4e36_a247_1e305bcee601"
      unitRef="pure">0.0989</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_18_85eaa2da_9d57_d976_f0d2_ad5490d16fc5">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3133_d7ca3a0d_4a0b_4169_8110_dd4618a46d85"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3134_f9808662_96c0_494e_97e2_6c2f5e1fa5a0"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3135_7bb0afec_7aeb_4783_af85_966c8023fd5f"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_20_e976f055_7fef_dacc_4a3a_159439e38d65">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3136_bbe1a99f_9496_4c35_bcb4_1419f734e1de"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3137_4d4a7742_6fc6_407c_9604_4bfb2fbfe739"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3138_d0618098_2203_4627_8e85_82e82a8ed6c9"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_21_a804aef5_f4bf_1e70_f96d_c7e9feb49da6">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3139_a4b4900d_9e54_49f6_9e43_a8294f96336a"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3140_6fdd466c_0856_4b9d_bcd0_561065ce3769"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3141_c0a14a5f_526e_407d_9d2f_bc649c5988c5"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083530Member"
      id="t_12_21f0b470_127a_9140_5275_24ed633edd1f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_13_79059c7c_afa7_b135_dee7_50ae6e0a7eab">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_14_3f70fc54_2cd7_8fda_e691_bcbcaacca309">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_15_7d536cda_48b1_d0e1_0fd7_86762569b1af">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083530Member"
      decimals="INF"
      id="h_3142_e58a39ee_f594_4aca_a221_5b3946b6a0d4"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083530Member"
      decimals="INF"
      id="h_3143_1ebaccbf_6092_4586_99c5_7e3dd6324a0c"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083530Member"
      decimals="INF"
      id="h_3144_d32cf3ef_1939_4ade_ad3e_f67242caeb99"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083530Member"
      decimals="4"
      id="h_3145_3feac253_2613_46c6_944d_988ab7c844c6"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_16_d604eccf_cfda_f73e_1aa7_2f11b47d4a03">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_272961.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083530Member"
      id="t_17_eabe4d82_eb07_d2f1_82c1_932deba8a523">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3146_935e962e_1acd_42bb_bc63_147258049553"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_BlackbaudIncMember"
      decimals="4"
      id="h_3147_52e7b1d9_2962_4bc0_9c6b_c6902bcba7ee"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_TeledyneTechnologiesIncMember"
      decimals="4"
      id="h_3148_f927f3ff_7d83_4c57_abe8_00a15293f3ef"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_CrownHoldingsIncMember"
      decimals="4"
      id="h_3149_2fd9a6ec_8449_4ffc_90ea_670092a2d410"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_CboeGlobalMarketsIncMember"
      decimals="4"
      id="h_3150_c36186ae_692b_4ce7_8238_db56f7246045"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_CommonStockMember"
      decimals="4"
      id="h_3151_5fa7b6a2_bb1f_4476_b14b_3cb53421ee24"
      unitRef="pure">0.992</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3152_25182e94_d075_4431_89de_a07c2acc1764"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3153_5b2fe208_80d9_4692_a99e_b185c1eeb0c3"
      unitRef="pure">0.007</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3154_8855be86_43cd_4004_938b_5e163de241dd"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_WarrantsMember"
      decimals="4"
      id="h_3155_07b2128e_0167_43ca_bf13_eb6322bc2284"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000083530Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3156_d31adfe2_c33f_4f50_8c15_9d6745aa9052"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077724Member"
      id="t_1_63cd5b01_ce5e_9119_6987_0dbdc0760f40">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000077724Member"
      id="t_2_946efebc_76d5_7a55_82cd_7346c680b02c">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077724Member"
      id="t_3_2fa8f768_6424_1462_d40b_4bc6051f2622">JSMGX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_4_06dfe0c4_1b88_dbb7_1267_06b8d011adbc">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077724Member"
      id="t_6_af685849_cc06_fe78_025b_ed89d72c26c8">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_5_29dad807_3d65_227c_152c_7f8ba3e5612a">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077724Member"
      id="t_8_126f3eb7_8cce_227e_ace9_af4d945cb764">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077724Member"
      id="t_7_45ec6709_6084_e514_0a38_9ab1f724f4d4">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_9_c1f0daa9_35ac_3e78_5124_b2e9f1d3c0e3">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class I Shares/JSMGX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;86&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077724Member"
      decimals="INF"
      id="h_3157_50a3ac0e_9874_4b6f_8428_b28482f1077b"
      unitRef="USD">86</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077724Member"
      decimals="4"
      id="h_3158_a5b266c7_0a3e_4f34_938f_fb915440cf22"
      unitRef="pure">0.0077</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_24_7c2087ec_dca4_c744_bb95_3452dd9d23fc">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class I Shares returned 23.48%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_272990.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_11_ff71ea0c_d830_b7ae_aa20_30707bde9a5d">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class I Shares/JSMGX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077724Member"
      id="t_18_51784ec1_d58a_4c2c_9813_df6b7150cded">Janus Henderson Triton Fund (Class I Shares/JSMGX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077724Member"
      decimals="4"
      id="h_3159_a6aa4111_204b_4517_b7e9_9a9fea72ec32"
      unitRef="pure">0.2348</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077724Member"
      decimals="4"
      id="h_3160_1e157f39_dd2c_4f15_818c_850e04e0774b"
      unitRef="pure">0.0733</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077724Member"
      decimals="4"
      id="h_3161_72db4ed8_3de7_4c9a_bfde_c14c19c9eab2"
      unitRef="pure">0.0993</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_19_cc9ee95d_a56c_4c69_8874_f7133e5d4f6c">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3162_e6ea1621_c2aa_47bd_8c50_a40ce7d0bb74"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3163_2df152e0_5dd8_4c19_aeff_fd6701caf5bd"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3164_98cc6820_cf5f_4832_ab88_cb7cdf57a832"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_20_2d0a0823_8a4b_b417_39e3_77c3fb22695a">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3165_5f52118e_5e49_4300_9ea4_dd32abb338cf"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3166_3bdee931_bfcf_4451_bb6a_ede1e193ab1d"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3167_83b1b8db_09c6_491b_b1c4_f15c6559f717"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_21_e8c916c1_7570_b768_c252_51c547a6821f">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3168_28d66b8d_ce75_419e_bd9e_cb3cbccace36"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3169_c240c42b_5de5_47cf_80fb_4b9761c5b001"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3170_df32d287_7bb0_46bf_a1ab_cab68ca01e59"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077724Member"
      id="t_12_3da8a6bd_5a48_c953_bdd6_817727111f41">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_13_b338931c_b27c_1b5e_c0cb_d682c8b4a7f2">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_14_9750c413_e618_951f_7d1a_c077710f0462">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_15_d19cfd16_c7ca_ef44_c83c_66c34067faba">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077724Member"
      decimals="INF"
      id="h_3171_bdece61d_566d_4be7_84e8_03925ab4ba57"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077724Member"
      decimals="INF"
      id="h_3172_42d65875_8ef5_43c4_a6dd_4914632e76e4"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077724Member"
      decimals="INF"
      id="h_3173_59c100ff_30ce_4014_8df4_892fc907351e"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077724Member"
      decimals="4"
      id="h_3174_ff50dace_220c_490d_b140_dabdc04fbdb0"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_16_db163c4a_8186_fa2c_510c_9b89a47f8191">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273000.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077724Member"
      id="t_17_d6b1e756_d8c4_e172_79f7_db7917c415e6">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3175_bb979346_5629_4b40_8cee_82388742737c"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_BlackbaudIncMember"
      decimals="4"
      id="h_3176_c0036c09_7e87_4c9a_9841_b96cc24d7fe4"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_TeledyneTechnologiesIncMember"
      decimals="4"
      id="h_3177_bfa1c027_d8fb_4f20_9cce_ff877a6d7448"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_CrownHoldingsIncMember"
      decimals="4"
      id="h_3178_8cc36ff4_0892_4cae_8d20_8d2071c0083f"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_CboeGlobalMarketsIncMember"
      decimals="4"
      id="h_3179_961b6b6e_ef84_4143_bb88_8b32fa5b48f4"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_CommonStockMember"
      decimals="4"
      id="h_3180_479772b7_086d_4964_829c_f01b7e8489ec"
      unitRef="pure">0.992</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3181_32b2a906_8808_4aa6_99f3_b12f56b02c24"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3182_5c8b3a81_cbc9_4e6d_9465_45ccb1e1ecf5"
      unitRef="pure">0.007</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3183_2bc030f3_8511_45cd_9d1a_66e77cc94eef"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_WarrantsMember"
      decimals="4"
      id="h_3184_99ca1b09_dbaf_436a_91d6_3e3df9ce542d"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077724Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3185_6c121901_35ee_4596_bf0a_bea57eeb1d2a"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000114880Member"
      id="t_1_303f7a71_71dc_e897_0ba0_cb218d3a5070">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000114880Member"
      id="t_2_eb7454c7_5143_0427_f48e_37161ddbfbdc">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000114880Member"
      id="t_3_ffc50ea3_6740_21e6_1cbf_0758d030b263">JGMNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_4_bccf0d41_7498_7438_fb03_d5835e0d8757">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114880Member"
      id="t_6_2a7a00c4_d387_cbf6_a90e_cd624933cba1">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_5_31365e34_2854_cda7_ef4d_e5812ae3c529">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114880Member"
      id="t_7_50aa2215_3109_db7f_ad1a_4bfe3f8f6680">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114880Member"
      id="t_21_822b7b65_7dde_2b42_4481_0c80a9e99f13">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_8_7cf41efb_8075_b328_33ef_9a393fac5220">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class N Shares/JGMNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;74&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114880Member"
      decimals="INF"
      id="h_3186_892595ad_a737_4a2c_816e_9c3a7a465ebf"
      unitRef="USD">74</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114880Member"
      decimals="4"
      id="h_3187_460de862_d454_4cd9_ad2c_107dc172f5d3"
      unitRef="pure">0.0066</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_26_0d8bf5ad_1020_83f0_ddfa_0b32ed5c7089">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class N Shares returned 23.59%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_23_a40fedec_2242_49e2_b6e6_6d8fd8dd0ad7">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273029.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_10_c4f3b734_9cc4_a9b8_fc30_6b131ce67673">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class N Shares/JGMNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      id="h_3188_f980a0d9_efe6_4c6d_aeb2_96d79ac55651"
      unitRef="pure">0.2359</oef:AvgAnnlRtrPct>
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      id="h_3189_fe9091f6_683e_49c9_9031_0fec40030d12"
      unitRef="pure">0.0744</oef:AvgAnnlRtrPct>
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      id="h_3191_dd9143d9_e55a_4916_a40b_4763cc056815"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
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      id="h_3192_5bbed22f_2d05_4861_a0d6_ccf4d496a0f4"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3193_1085e408_e711_4f41_beda_4f4e79e165d5"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_24_f7d96435_d3f6_23a7_9ba2_1d466925be2f">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3215_ff72f695_2cc1_a52b_3a85_e96d8f30ae3a"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3216_ba97c16e_52e8_bde9_20e3_a1b24e2ec485"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_3217_fc7c2012_9896_8140_135e_ae4916d2545a"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_25_162b434b_905e_9cdc_d1d5_b0fb5e3e74b9">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3218_10189fb7_9dd1_d5cc_93ee_971e5c4cce11"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3219_a705573b_75e2_615e_e7cf_a023b011d252"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3220_0cae944a_3108_0c33_1a13_82cf476410cf"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114880Member"
      id="t_11_44a5542d_9d4b_5915_704e_946bec115d6c">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_12_56220f4c_87b6_80f7_6f2c_43f1997d182f">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_13_81e5e460_a69f_0aff_e488_147230d692b7">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_14_8e1f1c00_640b_55c4_71ad_7ee4f723fb34">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114880Member"
      decimals="INF"
      id="h_3200_a2694398_3aad_42e4_8dab_d6a6e23b2339"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114880Member"
      decimals="INF"
      id="h_3201_966812d1_40af_4d7e_8313_3edac02f1688"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114880Member"
      decimals="INF"
      id="h_3202_5a6ffaae_23e1_4620_b031_ba3456482f4a"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114880Member"
      decimals="4"
      id="h_3203_614d2971_949b_4a9b_be42_90793b18deec"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_15_68fa0961_0dbe_157a_d77e_3c87b19c3f56">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt; white-space: nowrap;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273039.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000114880Member"
      id="t_16_f6fb8c4b_38b4_2054_d0e6_30fc85020244">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_3212_11b0cb24_c772_48bd_b72d_d46167ca5b56"
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      contextRef="FY2024_C000077725Member"
      id="t_1_cd9ec160_d087_7fe8_a49b_ea6b88980320">Janus Henderson Triton Fund</oef:FundName>
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      id="t_2_87eaaa70_d9c3_1478_51e8_3b4f4110b3d9">Class R Shares</oef:ClassName>
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      contextRef="FY2024_C000077725Member"
      id="t_4_448605e1_3266_0ce2_1af9_a8032f2b3cc4">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077725Member"
      id="t_6_b6a5d73f_6861_1668_08ac_4573ce1d42d5">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2024_C000077725Member"
      id="t_5_9b866b34_89f0_199c_b2a0_2bc92a2169a7">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077725Member"
      id="t_8_959849ac_8782_d005_7fed_2d5541c0c099">janushenderson.com/info</oef:AddlInfoWebsite>
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      id="t_7_83075147_e9c2_9ad9_b376_be57b75107a3">1-877-335-2687</oef:AddlInfoPhoneNumber>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class R Shares/JGMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;157&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_3215_fafd2b57_db2b_459b_9b74_1ee0d9fa9a16"
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    <oef:ExpenseRatioPct
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_23_4012ceb1_9cc3_30d3_77c1_39650490524b">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class R Shares returned 22.68%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273068.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_11_aeb5806a_aa22_ff5b_9e14_0ed73c698a54">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class R Shares/JGMRX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      decimals="4"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_25_ef52f7c8_d456_7eee_f937_f7912e5a9138">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3245_654a6400_94f4_6a8d_bf3b_a83e3952f8fa"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3247_939dd80e_a3f5_cc44_0eba_614d123f3868"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3249_72b5b1ab_923f_fb8c_e5dc_b243c5d9044a"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077725Member"
      id="t_12_ddd22c2c_c5c8_db23_3002_66f7c09f3ae2">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_13_1f1252e0_af0d_4ae3_edb9_ba7ed4ec6655">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_14_cdefc52f_dcd3_b7b0_1ff0_12ec91ecde2f">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_15_cc4d6c73_97a4_076c_0bce_cbc1c7aeb6fd">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077725Member"
      decimals="INF"
      id="h_3229_2d495f6b_5729_4682_9e4d_a293f279a0f2"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077725Member"
      decimals="INF"
      id="h_3230_294d928e_581a_489a_84de_a89eca0ccd4a"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077725Member"
      decimals="INF"
      id="h_3231_4fb875df_fb63_46bd_b344_be0cfb299aa0"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077725Member"
      decimals="4"
      id="h_3232_db23d3ce_924b_4bf0_85dd_fd65d73839de"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_16_578583d3_7535_121f_7770_e06824986892">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273078.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077725Member"
      id="t_17_0da05865_e1fd_e324_3581_739620aca7f8">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3233_c5214a0d_ad5e_496d_9317_e1e495232cb0"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_BlackbaudIncMember"
      decimals="4"
      id="h_3234_a450ddf2_5964_4e49_8fd0_06e6d9b2fd9e"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_TeledyneTechnologiesIncMember"
      decimals="4"
      id="h_3235_1fb005d0_d643_43f9_a03e_15b9c04b4c55"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_CrownHoldingsIncMember"
      decimals="4"
      id="h_3236_c767a5b8_32eb_4d13_a4eb_d1714a140c38"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_CboeGlobalMarketsIncMember"
      decimals="4"
      id="h_3237_8134690e_5892_4eab_a746_ad9daf31a8c0"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_CommonStockMember"
      decimals="4"
      id="h_3238_cb74deb8_3b94_4c90_bc46_41731fe1f74a"
      unitRef="pure">0.992</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3239_106aca89_137e_4ef0_a05f_8aab48001767"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3240_5c2b0027_92a9_4293_bc5b_acb7db5215ed"
      unitRef="pure">0.007</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3241_2f75474b_ee1b_482a_8f17_61fc03799f89"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_WarrantsMember"
      decimals="4"
      id="h_3242_3c535e1e_7e7c_44a2_9292_4f8dfdd970cc"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077725Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3243_0df2b450_5f72_42ac_8d4d_22a9f0e4196e"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000077726Member"
      id="t_1_a7bc91b5_6081_81b7_e893_ce68f3d67f86">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_d6e7f685_ac46_ec70_eeae_64039c770136">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000077726Member"
      id="t_3_b35eaa32_957e_e50a_55f2_f8e8b00bc22e">JGMIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_4_33f29a56_0081_a480_764d_36ada9ab8c42">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000077726Member"
      id="t_6_c5095fe2_a404_7016_86d0_a7b102cfcd96">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_5_f11eec1d_e53e_efba_06b4_f5057517d7db">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000077726Member"
      id="t_7_f7238e6b_c2f1_9ffa_1acf_7708d2e987c2">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000077726Member"
      id="t_8_bd8d8b8a_cace_11ff_327b_0bd5dc323063">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class S Shares/JGMIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;129&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000077726Member"
      decimals="INF"
      id="h_3244_cecb8c06_d239_4a3e_9f6c_828daa7ca157"
      unitRef="USD">129</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000077726Member"
      decimals="4"
      id="h_3245_cd9cfdf6_aecd_4990_8f8d_745787714f9b"
      unitRef="pure">0.0116</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_25_a44db18a_aab6_a981_472e_e48d6ae6bdfd">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class S Shares returned 22.97%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273107.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_11_cef70773_0663_e823_c25c_0a2f04698441">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class S Shares/JGMIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;22.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;6.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000077726Member"
      id="t_18_addc0283_c90c_8f0b_fd43_d0cdd09b8147">Janus Henderson Triton Fund (Class S Shares/JGMIX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000077726Member"
      decimals="4"
      id="h_3246_3a6886e7_cfa2_4e8f_b798_8d521216ff00"
      unitRef="pure">0.2297</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000077726Member"
      decimals="4"
      id="h_3247_1857dfb6_437a_4aac_a625_7042a43c8c89"
      unitRef="pure">0.0690</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000077726Member"
      decimals="4"
      id="h_3248_3b91d0ec_b98c_4e6a_bec9_81c7875c0f5d"
      unitRef="pure">0.0949</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_19_675c5ee0_17c1_57b7_9a97_89caf21b0191">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3249_3c7b921c_b9c4_498d_9bfd_8be201be3ee6"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3250_8ff2cff2_70c9_411a_84e6_1b77df6ec157"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3251_f536ee72_13c2_4dbb_8251_21d2263ec111"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_26_87dfb9b9_5be9_4669_b281_41fe4f817848">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3273_33a35916_2e6a_b4a4_093a_15660f01faa9"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3275_670e37fb_f1a9_d3a2_bc69_f6f2bbeedb0d"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3277_ffb08126_3ba2_e854_2393_a390f5f5bf32"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_27_a15bc372_0dc2_045b_61bb_c0187a2c2c0c">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3274_cfc44219_43b0_dfd0_d515_ffb97979ea5b"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3276_4d9cd018_5ca1_0cbd_1749_9f96ad107b04"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3278_49eacb21_0e61_f155_3ee9_6d795b759cd4"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000077726Member"
      id="t_12_d79f260f_cf1d_1d5f_bb80_e6e61dd95100">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_13_e6aba59a_520d_4b21_d400_8e8e58c9aa9c">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_14_25f00f15_82fe_966e_f116_5d89ba06c688">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_15_79a22bac_f75f_15e8_70dc_827fcb61b45d">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000077726Member"
      decimals="INF"
      id="h_3258_0c29ca8a_fe8a_46c2_a492_6d4da18584e0"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000077726Member"
      decimals="INF"
      id="h_3259_d0138a84_171c_4dc6_8364_9ce888ab1a89"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000077726Member"
      decimals="INF"
      id="h_3260_c060ab32_1f0b_4b46_8251_53e91fbdb4f3"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000077726Member"
      decimals="4"
      id="h_3261_8d97a793_97f5_454b_b8b2_cc397b3019b6"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_17_6e5ec899_d3cd_ac2e_6843_ac792a2d6704">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273117.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000077726Member"
      id="t_24_d7833f45_afea_e778_b954_be0dbec3e72e">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3262_d26d0302_1f7f_4701_8b58_9cbd8371cd01"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_BlackbaudIncMember"
      decimals="4"
      id="h_3263_4ddf5429_c502_4fd9_b1e1_c9b95d95a802"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_TeledyneTechnologiesIncMember"
      decimals="4"
      id="h_3264_ae8819b1_9c37_415e_a3a3_a180ac5d4273"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_CrownHoldingsIncMember"
      decimals="4"
      id="h_3265_d0de48dc_b626_4043_9cbb_4c30752da62d"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_CboeGlobalMarketsIncMember"
      decimals="4"
      id="h_3266_a104cd91_1ce2_48b1_ac51_31c2166af22b"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_CommonStockMember"
      decimals="4"
      id="h_3267_f6aa5a5e_cdba_4291_accf_67f681e85ed1"
      unitRef="pure">0.992</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3268_6e87c8a5_3292_4d76_a71e_a62be5cb9304"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3269_18757eb3_703a_4435_8383_54c2c4c3bec7"
      unitRef="pure">0.007</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3270_c40754a9_3f5c_4de4_b0db_657e9e1eae41"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_WarrantsMember"
      decimals="4"
      id="h_3271_a7454bea_ed98_4d02_a00a_05985dcea894"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000077726Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3272_5f0bec16_41b0_4a6f_80c9_a12c815ed91a"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028947Member"
      id="t_1_af12ce3b_c3bd_21d6_ce8a_798031c34cfb">Janus Henderson Triton Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028947Member"
      id="t_2_d685c788_40d5_8b8f_2a0f_6474c48b189a">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028947Member"
      id="t_3_aba27cc6_5106_b82d_7e55_0b2caa8a44d1">JATTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_4_dd24082e_fa04_cff1_63dc_adedef1afb87">This annual shareholder report contains important information about the Janus Henderson Triton Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028947Member"
      id="t_5_c0c46ea3_27e2_2705_b387_5440e72ac38e">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_6_7f0257e8_ccd2_539e_77a3_313922e35290">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028947Member"
      id="t_7_17cc1584_ed28_5d9a_9f1b_6578e2758e53">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028947Member"
      id="t_8_0abbdc6e_059f_c26f_4b90_f43f1c6e907a">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_9_5fc36520_ee38_d8dd_62bd_4de859fc9d6b">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund&lt;br/&gt;(Class T Shares/JATTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;101&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028947Member"
      decimals="INF"
      id="h_3273_28be2195_139a_4383_b114_b1d49f07d438"
      unitRef="USD">101</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028947Member"
      decimals="4"
      id="h_3274_24fc92ef_105f_4ea5_80bf_cba85b228cba"
      unitRef="pure">0.0090</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_25_6886d1fc_15a3_7730_532f_d23214adf8f7">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Triton Fund Class T Shares returned 23.34%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2500&#x2122; Growth Index, returned 25.20%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;AST SpaceMobile was a top contributor relative to the performance benchmark. This early-stage communications services company secured major contracts and funding to support its development of a low-orbit satellite network. Healthcare company Vaxcyte, another contributor, reported positive clinical trial results for its vaccine that targets 31 strains of invasive pneumococcal disease.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_23_721db399_b26b_5454_a908_839b70c4aede">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_273146.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Triton Fund (Class T Shares/JATTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2500&#x2122; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028947Member"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000028947Member"
      decimals="4"
      id="h_3275_4044a649_e9a7_499c_a134_0833ec9c4a33"
      unitRef="pure">0.2334</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028947Member"
      decimals="4"
      id="h_3276_90dcc79a_c6ee_44e2_8368_6741b6052b43"
      unitRef="pure">0.0718</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028947Member"
      decimals="4"
      id="h_3277_f3d1d9b8_e2d5_4f0d_9372_764e8fdbd2f8"
      unitRef="pure">0.0978</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_13_edb0a209_ee00_cf6f_118f_db9d684917fe">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3278_cd9b502a_0c78_44af_8482_4cd8edbfe774"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3279_42086433_768d_475f_8301_7a12f4a9f4af"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3280_baf48cea_f833_4a04_a996_0d58aeaa36c4"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      id="t_14_462d746d_daa4_cef7_16c9_2995d5cf07ad">Russell 2500&#x2122; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3281_4cafeedd_fd69_4527_9365_738b0f7f8497"
      unitRef="pure">0.2520</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3282_ec595911_0591_40fd_8554_9c7d4468aa9e"
      unitRef="pure">0.0975</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2500TMGrowthIndexMember"
      decimals="4"
      id="h_3283_4f74dcbe_62ae_47a1_ac81_7edd34f3f3de"
      unitRef="pure">0.0998</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_15_e62a12b9_92dd_8b46_31ca_1c1ca1f369fb">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3284_a5b216a5_4791_43c7_8431_c53158afed3d"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3285_28eeacdd_8721_4855_b06b_42a16b023631"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3286_6e49769b_4b41_4c28_bc7a_a186262c89d8"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028947Member"
      id="t_16_719a2c41_d4d9_86c6_0711_16d682ca8b04">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_17_2e9a0d52_703d_9b02_18c1_5b460f890a73">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_18_7fc04a00_a788_e7a1_7cb3_dc8cbd900581">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2024_C000028947Member"
      id="t_19_3003f470_38ad_10be_e707_7878d23206a7">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6,661M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;130&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;41.6M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028947Member"
      decimals="INF"
      id="h_3287_b89a89df_e68d_49a2_b7e5_1b308d170e4a"
      unitRef="USD">6661000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028947Member"
      decimals="INF"
      id="h_3288_dd130fea_2310_41cc_969d_03c232c7743c"
      unitRef="Holding">130</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028947Member"
      decimals="INF"
      id="h_3289_b7081837_b9a5_4067_a6ac_dce2e11e92d4"
      unitRef="USD">41600000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028947Member"
      decimals="4"
      id="h_3290_fe34a1e9_702e_432a_864f_49cdef5084d5"
      unitRef="pure">0.19</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_21_10a21b2e_eb63_dd42_fa2b_af816169031e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.2&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_273156.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028947Member"
      id="t_24_5a7f2069_aad1_0391_1841_a98424fbe6c7">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;


&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Teledyne Technologies Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Crown Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Cboe Global Markets Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.8&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3291_2ad163d0_ccd7_4b16_84d8_43045fb1f819"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_BlackbaudIncMember"
      decimals="4"
      id="h_3292_9738c680_a0fc_4d4a_9335_a06c7aa181a4"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_TeledyneTechnologiesIncMember"
      decimals="4"
      id="h_3293_91541b44_fcf9_4d82_ba4c_5d4a4786451b"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_CrownHoldingsIncMember"
      decimals="4"
      id="h_3294_77417b86_af85_4341_8eb2_0dea2db76a7e"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_CboeGlobalMarketsIncMember"
      decimals="4"
      id="h_3295_e9288547_fb61_4a93_b6fc_2b3d90b13872"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_CommonStockMember"
      decimals="4"
      id="h_3296_afd66e0f_0608_4d92_8351_9aaf4e076bd2"
      unitRef="pure">0.992</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3297_5dbe279b_c0dd_4184_85fb_f4a422c67ea1"
      unitRef="pure">0.009</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3298_bd66a012_a311_4cd6_9b26_4d2fb6aa3058"
      unitRef="pure">0.007</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3299_d8eb739b_b06b_4f15_8deb_c67ec80480a7"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_WarrantsMember"
      decimals="4"
      id="h_3300_b47224c9_58d0_45dd_8fc5_3dd1452c1a25"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028947Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3301_8325045b_f3f4_434e_b10b_e9e02c071813"
      unitRef="pure">-0.012</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000240132Member"
      id="t_1_f27a9e94_1a27_5c84_0bfa_d06465d7f47d">Janus Henderson U.S. Dividend Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000240132Member"
      id="t_2_be7c6f72_ea69_a565_27cc_71f3d00c2d2d">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000240132Member"
      id="t_3_9bc3c832_9b8e_14ed_164a_41b1544ff622">JDDVX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_4_75936cd6_800d_72cb_5e9e_0103b9f72a61">This annual shareholder report contains important information about the Janus Henderson U.S. Dividend Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000240132Member"
      id="t_5_003087ac_255b_c792_8edd_e18324189fbb">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_6_ad0bda7d_ef81_89d6_c1f4_adbe7d0ea4d2">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000240132Member"
      id="t_7_8b765b3b_ad9b_0075_3a66_b1cce2bbaf6a">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000240132Member"
      id="t_8_121d7f70_7395_bd02_fa67_23a056170a31">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_9_4680b1b4_10fe_3c6e_ca7a_e0f593ed8e17">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson U.S. Dividend Income Fund&lt;br/&gt;(Class D Shares/JDDVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;100&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000240132Member"
      decimals="INF"
      id="h_3302_da812480_8b84_4169_a804_e80ea629ef71"
      unitRef="USD">100</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000240132Member"
      decimals="4"
      id="h_3303_1190cf36_92e5_40e6_9f0b_91b845bb14b6"
      unitRef="pure">0.0089</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_23_f12a93f6_9080_cccf_7a56_1d4a596b1c0c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson U.S. Dividend Income Fund Class D Shares returned 23.89%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Value Index, returned 27.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Broadcom was a top contributor to returns relative to the performance benchmark. The semiconductor and infrastructure software solutions provider benefited from increased technology spending to support the rollout of artificial intelligence. Financial services firm American Express, another contributor, saw a significant profit increase driven by higher customer balances and spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our emphasis on high-quality, dividend-growth stocks hindered returns relative to the performance benchmark, as we did not own several non- or lower-dividend-paying mega-cap technology stocks that were strong drivers of index returns. Starbucks was a relative detractor among stocks we owned, as the coffee purveyor faced slower consumer discretionary spending and higher costs. Oil and gas company ConocoPhillips also underperformed after reporting disappointing earnings.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_22_497fc598_9acd_c620_d501_f7cdedf8d01a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;December 20, 2022, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275486.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_11_0eb3c76b_00ff_3153_90d4_ffb61221ee9c">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson U.S. Dividend Income Fund (Class D Shares/JDDVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000240132Member"
      id="t_12_9fb43a98_a111_6c5c_c52c_83a9a2af2961">Janus Henderson U.S. Dividend Income Fund (Class D Shares/JDDVX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000240132Member"
      decimals="4"
      id="h_3304_338a3a18_041e_4c5c_8374_ca859ea51235"
      unitRef="pure">0.2389</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_C000240132Member"
      decimals="4"
      id="h_3305_b100f20a_8564_4da9_9535_9205d36d1b7f"
      unitRef="pure">0.1264</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000IndexMember"
      id="t_13_f27fcf6a_f07f_b836_1120_f466be07f0d4">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_3306_7f1ae0d2_6de8_4317_8fc4_9bf07e6433f3"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_Russell1000IndexMember"
      decimals="4"
      id="h_3307_19c54b31_4a0f_4286_8bc4_f96f754762a6"
      unitRef="pure">0.2756</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000ValueIndexMember"
      id="t_14_2d3abe14_8e0e_7ad1_fd52_56044f8fa6b2">Russell 1000&#xae; Value Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000ValueIndexMember"
      decimals="4"
      id="h_3308_8366a29b_32dd_4088_b433_66a9f2b3d15b"
      unitRef="pure">0.2776</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_Russell1000ValueIndexMember"
      decimals="4"
      id="h_3309_6b6e59ed_8759_4a19_9677_fc600c49aed6"
      unitRef="pure">0.1682</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000240132Member"
      id="t_15_1b1efbcc_402d_5f99_25b6_87cd79f235fa">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_16_6011352d_65d1_03dd_b18e_17df4ca895c3">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_17_8ca04c78_3e36_4ca1_1ffe_559f42cab23c">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_18_5a3d621c_2688_cefe_6d37_7b8bdb71e56c">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;52&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000240132Member"
      decimals="INF"
      id="h_3310_a3256dae_8a3d_46f2_8129_69d089497b84"
      unitRef="USD">22000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000240132Member"
      decimals="INF"
      id="h_3311_b1175110_91f8_484c_96ef_22ce1e662bee"
      unitRef="Holding">52</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000240132Member"
      decimals="INF"
      id="h_3312_0f64110b_1ac6_4bfb_9c9b_c4732b05415c"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000240132Member"
      decimals="4"
      id="h_3313_d4551cf2_dfca_46e2_b950_867410f6d70d"
      unitRef="pure">0.81</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_20_16d2fb49_ac4f_7702_4cfb_986b2770db6c">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;International Business Machines Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;CME Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275496.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000240132Member"
      id="t_19_d5668347_791d_08fc_7a21_6da86e69a8ca">

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;International Business Machines Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;CME Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_InternationalBusinessMachinesCorpMember"
      decimals="4"
      id="h_3314_a4251dd4_7850_4d13_99cd_8df581dea31e"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_3315_92e8be01_33b1_4556_a614_1463f0987bf0"
      unitRef="pure">0.044</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_CMEGroupIncMember"
      decimals="4"
      id="h_3316_94d67b60_bda0_46b6_b5f5_531a44c43904"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_3317_c3904519_5a02_4ca3_8e50_52ea50770b7d"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_AbbVieIncMember"
      decimals="4"
      id="h_3318_1bc0db1d_05a9_47f7_b0a0_28103dc38d8a"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_CommonStockMember"
      decimals="4"
      id="h_3319_ac79879c_39a5_4d53_a629_61217913fad2"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3320_9c1ad512_eff0_485e_a8f5_08ee31f84089"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240132Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3321_e80bc462_79cb_41a5_88f1_2d25dd0660bb"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000240130Member"
      id="t_1_a422320a_9f61_5ca2_9bff_e46219e5b043">Janus Henderson U.S. Dividend Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000240130Member"
      id="t_2_c42bb7ad_8123_dfb5_87cd_a7746ea28d33">Class I Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000240130Member"
      id="t_3_935045b7_65da_b90d_f3e3_912bfbbca706">JIDVX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_4_2ece26e7_165e_a424_6c50_7f237c243f0f">This annual shareholder report contains important information about the Janus Henderson U.S. Dividend Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000240130Member"
      id="t_6_a323e674_7971_0054_d172_7b7c02baf41a">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_5_5f19398a_9ad4_aad1_12f3_68dd27910891">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000240130Member"
      id="t_8_dff84c08_8721_18d5_2e9d_6006ff171faf">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000240130Member"
      id="t_7_a9eee1b7_f86d_e8cd_f322_3dd92777585b">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_9_83b95a80_3005_219d_5595_8ba0f61dc1fd">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson U.S. Dividend Income Fund&lt;br/&gt;(Class I Shares/JIDVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;88&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000240130Member"
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      id="h_3322_c0a5456b_6aee_4ff7_93e7_408c9de83747"
      unitRef="USD">88</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000240130Member"
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      id="h_3323_d70e836c_46a0_4cd5_8cce_b3460a084e48"
      unitRef="pure">0.0079</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_22_2fdb272b_704e_478e_e508_054caae6a20c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson U.S. Dividend Income Fund Class I Shares returned 23.94%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Value Index, returned 27.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Broadcom was a top contributor to returns relative to the performance benchmark. The semiconductor and infrastructure software solutions provider benefited from increased technology spending to support the rollout of artificial intelligence. Financial services firm American Express, another contributor, saw a significant profit increase driven by higher customer balances and spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our emphasis on high-quality, dividend-growth stocks hindered returns relative to the performance benchmark, as we did not own several non- or lower-dividend-paying mega-cap technology stocks that were strong drivers of index returns. Starbucks was a relative detractor among stocks we owned, as the coffee purveyor faced slower consumer discretionary spending and higher costs. Oil and gas company ConocoPhillips also underperformed after reporting disappointing earnings.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;December 20, 2022, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275525.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson U.S. Dividend Income Fund (Class I Shares/JIDVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      contextRef="FY2024_C000240130Member"
      id="t_18_2570a9fc_ab19_5e6c_c025_03f41d2102b0">Janus Henderson U.S. Dividend Income Fund (Class I Shares/JIDVX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000240130Member"
      decimals="4"
      id="h_3324_133c1b45_fab6_4b36_a2cf_a595a3397990"
      unitRef="pure">0.2394</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_C000240130Member"
      decimals="4"
      id="h_3325_c3ef3f15_8bfd_4401_a1df_a111903bf856"
      unitRef="pure">0.1271</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000IndexMember"
      id="t_19_a690b91e_6424_6ce5_2bb1_641e6856d62c">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_3326_bd388bfe_b45f_4c5e_9e82_2d09be1c972e"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_Russell1000IndexMember"
      decimals="4"
      id="h_3327_57531017_b664_42ec_af55_89dcd3f27b98"
      unitRef="pure">0.2756</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000ValueIndexMember"
      id="t_20_84cf6a55_4e92_5cd0_7a51_a8f6c8f98ff8">Russell 1000&#xae; Value Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000ValueIndexMember"
      decimals="4"
      id="h_3328_8d8b3d11_b5f0_4824_9114_2cb2c0991b84"
      unitRef="pure">0.2776</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_Russell1000ValueIndexMember"
      decimals="4"
      id="h_3329_129ec3ed_cd1a_4ee9_afb3_16266e6cf615"
      unitRef="pure">0.1682</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000240130Member"
      id="t_12_b8553d3a_2642_adaa_3dff_e273d6d5e250">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_13_ccb7f2e2_213f_429f_1ebc_285433ccabfb">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_14_16168270_b784_7f46_e6db_e5e3c1ef1b2f">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000240130Member"
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;52&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000240130Member"
      decimals="INF"
      id="h_3330_50bce768_505b_4d1a_a2bc_de463240ca24"
      unitRef="USD">22000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000240130Member"
      decimals="INF"
      id="h_3331_18faf3c1_b29c_4402_9129_16ef031c54f9"
      unitRef="Holding">52</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000240130Member"
      decimals="INF"
      id="h_3332_e18e2645_e0a2_4002_9aee_79d7691c9f6a"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000240130Member"
      decimals="4"
      id="h_3333_b70a2caa_2f59_4a04_a6a4_f1f854f3a1bd"
      unitRef="pure">0.81</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_16_89b971eb_68de_960a_bb89_6e91de31281f">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;International Business Machines Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;CME Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275535.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000240130Member"
      id="t_17_4e9105fc_eda9_60e4_4cea_1f9f5fe3eec6">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;International Business Machines Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;CME Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_InternationalBusinessMachinesCorpMember"
      decimals="4"
      id="h_3334_1cbc4f25_9466_495e_aaa1_abb1a3fdc411"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_3335_95aa1109_6c0c_47d5_89bd_f4e969f3857c"
      unitRef="pure">0.044</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_CMEGroupIncMember"
      decimals="4"
      id="h_3336_0102294c_2219_4bfd_a078_6273dfe07998"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_3337_f676738e_a0a2_427e_8894_6b9765e1a5f1"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_AbbVieIncMember"
      decimals="4"
      id="h_3338_f7db57b1_4207_4a1e_baa4_b22542bb3e16"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_CommonStockMember"
      decimals="4"
      id="h_3339_d8ac1386_688e_4e13_a54c_4fe5a8db1ec5"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3340_0f70389b_4027_40b8_a2be_24a50ad3ff3e"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240130Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3341_1b226b35_2a75_44ad_b709_f504ec58cb62"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000240131Member"
      id="t_1_5471b4de_9698_20c7_4514_5126d26669b4">Janus Henderson U.S. Dividend Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000240131Member"
      id="t_2_01cc010d_2b54_18c0_199e_852add788c2a">Class N Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000240131Member"
      id="t_3_28ee29e7_683f_e842_d71a_a3b87c806950">JNDVX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_4_6dfe7e69_2f9e_4d1b_dcf3_d6fb5340fb9c">This annual shareholder report contains important information about the Janus Henderson U.S. Dividend Income Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000240131Member"
      id="t_6_ddd05e05_4033_54af_a621_a4013afb3478">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_5_52222ee3_07ae_9719_254b_6f75b2b25f75">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000240131Member"
      id="t_7_c7aaefe0_d20b_217a_a967_7d2b17cc4038">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000240131Member"
      id="t_8_1ceed0b2_4bf8_8efa_55cb_92ad6b9ccb51">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_9_2e8e11aa_eccb_1ea6_74d9_52bedbcb59ac">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson U.S. Dividend Income Fund&lt;br/&gt;(Class N Shares/JNDVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000240131Member"
      decimals="INF"
      id="h_3342_9110f158_5f69_4619_bf22_26047d71ae46"
      unitRef="USD">85</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000240131Member"
      decimals="4"
      id="h_3343_ebddeda5_5304_403a_bac7_3d8f262f812f"
      unitRef="pure">0.0076</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_23_3ff2ba67_5057_e0d2_75bc_e740db9091da">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson U.S. Dividend Income Fund Class N Shares returned 23.95%. Its broad-based benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.68%. Its performance benchmark, the Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Value Index, returned 27.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Broadcom was a top contributor to returns relative to the performance benchmark. The semiconductor and infrastructure software solutions provider benefited from increased technology spending to support the rollout of artificial intelligence. Financial services firm American Express, another contributor, saw a significant profit increase driven by higher customer balances and spending by affluent cardmembers.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Our emphasis on high-quality, dividend-growth stocks hindered returns relative to the performance benchmark, as we did not own several non- or lower-dividend-paying mega-cap technology stocks that were strong drivers of index returns. Starbucks was a relative detractor among stocks we owned, as the coffee purveyor faced slower consumer discretionary spending and higher costs. Oil and gas company ConocoPhillips also underperformed after reporting disappointing earnings.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_22_fb82234b_ddda_33bd_b8eb_373f89461558">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;December 20, 2022, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275564.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_11_a5c5b3d4_dd24_f92e_3ace_6bc382f2d185">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;Since Inception&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson U.S. Dividend Income Fund (Class N Shares/JNDVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;23.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 1000&lt;sup&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;16.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000240131Member"
      id="t_18_25ec8319_ad7f_5aa5_548e_130095d1954e">Janus Henderson U.S. Dividend Income Fund (Class N Shares/JNDVX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000240131Member"
      decimals="4"
      id="h_3344_feaa2a4b_219f_4895_962f_78836476eb59"
      unitRef="pure">0.2395</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_C000240131Member"
      decimals="4"
      id="h_3345_6aaac1cf_9f9e_46b8_a473_21edabc1f35b"
      unitRef="pure">0.1272</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000IndexMember"
      id="t_19_9b5a6cdd_29ee_2988_6196_0e14cf683ea3">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000IndexMember"
      decimals="4"
      id="h_3346_fdd47564_9b7a_46f5_9a44_45782a60e275"
      unitRef="pure">0.3568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_Russell1000IndexMember"
      decimals="4"
      id="h_3347_51377984_4366_49c6_adcb_9f6793fbc6e1"
      unitRef="pure">0.2756</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell1000ValueIndexMember"
      id="t_20_bffc92eb_41b5_9700_44a8_e1b8130279f8">Russell 1000&#xae; Value Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell1000ValueIndexMember"
      decimals="4"
      id="h_3348_52861d45_fe29_45af_8eef_10b7debc0fbc"
      unitRef="pure">0.2776</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20221220_20240930_Russell1000ValueIndexMember"
      decimals="4"
      id="h_3349_814dce6b_bcb5_4338_874b_18951a071c22"
      unitRef="pure">0.1682</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000240131Member"
      id="t_12_80d6e8c6_f72d_62bc_40fa_ec2aa347b1a6">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_13_579ee1da_e44c_4a00_4e8f_870419be533a">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_14_e1863ecd_22f5_43a4_12dd_0e3dc79b7924">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_15_93ec6551_897c_5434_54a9_f1a55710c6b2">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;22M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;52&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;0.0M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000240131Member"
      decimals="INF"
      id="h_3350_099e541f_0ef2_42d4_b7f5_cdc82d301d24"
      unitRef="USD">22000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000240131Member"
      decimals="INF"
      id="h_3351_6dd8f6fc_0e3d_4360_8cfa_fcfd36101905"
      unitRef="Holding">52</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000240131Member"
      decimals="INF"
      id="h_3352_a1cd6129_d3a3_4fbf_ae9e_649edb56e30c"
      unitRef="USD">0.0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000240131Member"
      decimals="4"
      id="h_3353_c4db3982_b2c2_477b_90a6_a2010d57cec9"
      unitRef="pure">0.81</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_16_a1c9537a_f994_3ad5_22ae_eaf74a3511c5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;International Business Machines Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;CME Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;99.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(0.1&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275574.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000240131Member"
      id="t_17_9ae0e916_097f_ca40_2532_1a5c52b2efe4">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;International Business Machines Corp&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;JPMorgan Chase &amp;amp; Co&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;4.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;CME Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;UnitedHealth Group Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.2&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;AbbVie Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;3.1&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_InternationalBusinessMachinesCorpMember"
      decimals="4"
      id="h_3354_8c4bfb69_8ddf_40c8_9c7b_31cb0fa72c8f"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_JPMorganChaseAndCoMember"
      decimals="4"
      id="h_3355_3d353a71_9670_422f_aa11_0b2b838c86cd"
      unitRef="pure">0.044</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_CMEGroupIncMember"
      decimals="4"
      id="h_3356_c421ce4a_0108_4bf1_a76b_dbf28d5992d8"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_UnitedHealthGroupIncMember"
      decimals="4"
      id="h_3357_c5afb0a4_a482_4f9b_847e_0b7f10c0e45c"
      unitRef="pure">0.032</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_AbbVieIncMember"
      decimals="4"
      id="h_3358_5f085302_9427_4a24_9905_fdddda45930b"
      unitRef="pure">0.031</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_CommonStockMember"
      decimals="4"
      id="h_3359_db735e54_d0b8_4ffd_a034_d08f4fb9c620"
      unitRef="pure">0.999</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3360_9ffa9b4a_8eac_466c_8d93_6df8cb5098e7"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000240131Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3361_478c5099_a4f4_4a8e_9f7c_8175106c4f80"
      unitRef="pure">-0.001</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000100475Member"
      id="t_1_509246a0_7cc4_b0fa_aaf6_bdd1c551318a">Janus Henderson Venture Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000100475Member"
      id="t_2_43b4f29e_7798_3b52_efe7_6015896a9c1a">Class A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000100475Member"
      id="t_3_0b3c161e_8a5c_b37d_c7fc_f81fad2f75ad">JVTAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000100475Member"
      id="t_5_104a14a9_53be_883b_0a24_aa7f61541bbe">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000100475Member"
      id="t_4_c6e126b2_14c2_48be_42a9_e4241c5040ff">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000100475Member"
      id="t_6_560ab075_6a03_ca3e_16c8_445ce846e17a">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000100475Member"
      id="t_7_af77a5d3_b379_2406_ae84_b36a8bf02408">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000100475Member"
      id="t_8_a6b03a10_c5c9_51fb_1d4f_9a5a51978d1a">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000100475Member"
      id="t_9_dd209d96_4e09_02bb_9840_660c382cddec">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class A Shares/JVTAX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;115&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000100475Member"
      decimals="INF"
      id="h_3362_5e82c56e_0db8_4b33_9574_4572d954e5e1"
      unitRef="USD">115</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000100475Member"
      decimals="4"
      id="h_3363_adc6e541_2ee0_4152_b7b0_20e89d764354"
      unitRef="pure">0.0101</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000100475Member"
      id="t_26_4449dfbe_17d0_48c7_3021_31af2ea9a69d">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class A Shares returned 27.42%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275603.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class A Shares/JVTAX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class A Shares/JVTAX) at Maximum Offering Price - 5.75%&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;20.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.47&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2742</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3365_032ddb8e_eb0d_482b_a605_3318a2576b03"
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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      id="h_3368_745d8aab_0eac_45a9_87d0_d5ff9ef9fab6"
      unitRef="pure">0.0747</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3369_e0811ead_56f8_4373_a7af_386de5d2f78b"
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_20_473b1f96_8e2c_61a1_6ae0_a8e5286952c3">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_3370_7a8ebc47_9c9b_4198_87b4_2b495c9eabf8"
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    <oef:AvgAnnlRtrPct
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      id="h_3371_58a2d543_f810_45de_8ab0_f5d7d2c3daa5"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="t_25_eac29599_d992_1a68_027e_80a245ee4c14">Russell 2000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3395_f4c6351a_443c_52fe_465f_62ecb1c994c3"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3396_a41ceefb_4ab2_6c43_72ac_996afa849326"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
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      id="t_12_20f52d6e_51f7_c1ce_d001_b8611f09078d">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000100475Member"
      id="t_13_90e550d2_43a8_c008_880c_4ce809245b1e">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2024_C000100475Member"
      id="t_14_e029ef23_c5b1_05b2_fa76_aa3adf718882">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_3379_2fc03c79_0d9d_410b_b9de_b3110cd30549"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000100475Member"
      decimals="INF"
      id="h_3380_0a829c46_34b2_494f_b420_5302c47a4408"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_3381_9986447e_7af1_47bc_b2be_1cdc9a888c7b"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000100475Member"
      decimals="4"
      id="h_3382_b00f1c69_070b_47c8_93c2_532664db5f6b"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
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      id="t_16_d63bfcfe_d195_2bb9_155d_f255040a05a8">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275613.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000100475Member"
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_StrideIncMember"
      decimals="4"
      id="h_3383_d8dbfd3c_56e9_4851_a715_f1e0e104bcbe"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3384_cc361228_7a8d_4ba1_aa1b_1dcb8ce62e60"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_VaxcyteIncMember"
      decimals="4"
      id="h_3385_847df844_af1f_4f37_9852_c2ef161af866"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_DescartesSystemsGroupIncTheMember"
      decimals="4"
      id="h_3386_c1d796e9_b8c5_4d5f_9ff1_6fbd5f423bcd"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_BlackbaudIncMember"
      decimals="4"
      id="h_3387_3ae581d4_5537_47d2_b4ad_3d96485fffcd"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_CommonStockMember"
      decimals="4"
      id="h_3388_d6c94893_ed37_4a4d_9fb4_5106a7607708"
      unitRef="pure">0.986</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3389_f718ce5c_5873_464a_8b0b_4b691f344b17"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3390_95dbdde6_8c81_4c96_922a_c42667e3bbf0"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3391_005dc82f_c65e_4d67_9e1d_5608c286c40d"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_WarrantsMember"
      decimals="4"
      id="h_3392_a789b2dd_55ae_472d_be74_20bdba6132ea"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100475Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3393_b9cb0fd9_5a1f_4292_8605_ce636826e4b8"
      unitRef="pure">-0.010</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000100476Member"
      id="t_1_999cb672_dfeb_4c38_0689_2d97809af2ba">Janus Henderson Venture Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000100476Member"
      id="t_2_a4a88bfa_e7d9_9787_14c4_44ad6ce88193">Class C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000100476Member"
      id="t_3_c98a70b6_bd02_af2d_cd69_81d5ba0037e7">JVTCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_5_456a21f3_9e3d_e25f_ed0b_c892d284b737">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000100476Member"
      id="t_4_ec110ee3_9819_7633_c220_14131c36fc15">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_6_243fa993_8ff8_10f3_3b80_a6a572297559">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000100476Member"
      id="t_7_52eeb14e_0c7b_72dc_bc8b_bbf913878f31">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000100476Member"
      id="t_8_b1110f6e_6fe5_a76b_8566_b3ee5fa0a0cd">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_9_7405ad9c_eb85_2a60_6a2e_be53c9849adb">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class C Shares/JVTCX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;187&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000100476Member"
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      id="h_3394_2af4f71e_a7fb_44ee_933a_3d5be5717046"
      unitRef="USD">187</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000100476Member"
      decimals="4"
      id="h_3395_75f4c952_0063_4363_b9f1_97ff2237c693"
      unitRef="pure">0.0165</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_25_407720d0_6aca_be18_4212_7f65c97e59ad">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class C Shares returned 26.68%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000100476Member"
      id="t_24_7d460d8f_9d26_a582_a206_719681b781bd">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275642.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_11_f449ff40_927f_5918_0a73_b6dfbc20eb26">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class C Shares/JVTCX) at NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class C Shares/JVTCX) with Contingent Deferred Sales Charge&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;25.68&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;7.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;&lt;sup&gt;*&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-size: 7.5pt; color: #393d47; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Returns include a 1% contingent deferred sales charge on Shares redeemed within 12 months of purchase.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="t_18_4b3259a0_eed5_e9cf_23b1_693f58547d86">Janus Henderson Venture Fund (Class C Shares/JVTCX) at NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_3396_c196c222_2b3e_4357_a229_ab69d9e491f5"
      unitRef="pure">0.2668</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3397_6e143253_457d_4fc1_8462_78d1107eb59d"
      unitRef="pure">0.0794</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3398_a31213e9_b958_44b0_8b05_961532170001"
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3399_faf3e685_c598_47d7_82f9_8d74ac9896c8"
      unitRef="pure">0.2568</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3400_d9a48407_6e30_4aa0_b0cf_1d1bf9eff34b"
      unitRef="pure">0.0794</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000100476Member"
      decimals="4"
      id="h_3401_30ec487d_8402_45b2_882a_b9e53c61ad30"
      unitRef="pure">0.0890</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_20_a87855c7_6c6e_63e3_6e11_470daff69b9c">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3402_66af30d3_b9f7_4817_a796_42cc2b041681"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3403_a6ad9e6b_54a1_406a_9b62_bccfa409cdbf"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3404_9d9445df_f9a3_4172_99d2_6f26bbef3a1f"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_21_26e79568_2174_b9b7_2485_fbfdc695c606">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3405_27e58864_979d_4836_bb80_9921c18a4bca"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3406_0b1bf6cd_edd4_4705_80b5_e37310df480b"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3407_ffa3768c_4f90_4f5c_a9e7_36e3ed77b7a8"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000IndexMember"
      id="t_22_9b778759_38b9_ea78_c992_1ccb9cb14eb6">Russell 2000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3408_97dfb431_376c_40ca_8444_b901223b3d37"
      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3409_8806eca3_f4f7_4d0f_94c8_cdc910e9bfe2"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3410_22d37e9e_447f_4b4d_b426_5d8f685f64fe"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000100476Member"
      id="t_12_41dc3c75_fea1_5818_cb6a_6f856f1f733f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_13_3e21536c_629e_d2ac_e568_d24e9bfccaba">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_14_41a1637f_649f_d626_973a_eadf1a0dfbbd">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_15_3dfe7a37_d98c_8def_6a58_f9c10bc44f79">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000100476Member"
      decimals="INF"
      id="h_3411_3f2c0082_7d9d_4a83_9de9_2929ba59cd77"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000100476Member"
      decimals="INF"
      id="h_3412_7dc07892_66a5_43fe_8770_aa45d8f47fdb"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000100476Member"
      decimals="INF"
      id="h_3413_3fda51ca_0579_46d5_a629_0839130b4f3c"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000100476Member"
      decimals="4"
      id="h_3414_fec756d5_efc2_4402_97cd_843a04c47108"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_16_d21f0968_9faa_7273_4029_874ea157f752">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275652.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000100476Member"
      id="t_17_d1c1f977_7528_4cc5_0cd6_847d3e8c77cd">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_StrideIncMember"
      decimals="4"
      id="h_3415_f9183ff9_0972_4939_9b47_e6cc4b66ca60"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3416_5cf5c3db_ddd3_4ee2_a541_a481cc3ae134"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_VaxcyteIncMember"
      decimals="4"
      id="h_3417_f90f19cd_1571_4f58_ae10_3b0fabb1abf4"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_DescartesSystemsGroupIncTheMember"
      decimals="4"
      id="h_3418_277c5f53_cd76_4739_87fe_4aa32d35a34f"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_BlackbaudIncMember"
      decimals="4"
      id="h_3419_378ddcc6_4113_46ec_aaca_9bfb6d3e2d8b"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_CommonStockMember"
      decimals="4"
      id="h_3420_e6691c2a_cf78_48a4_8de5_2884a46f7f79"
      unitRef="pure">0.986</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3421_8a266c5f_13a7_4a06_abcf_467e884501c7"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3422_0e1de61f_7eba_4a60_ba47_847de4891f12"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3423_f34bb83b_c0ad_477d_91d6_0f98c00ec54b"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_WarrantsMember"
      decimals="4"
      id="h_3424_13a96f69_91cc_4ec8_966a_bb4f76b73583"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100476Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3425_74004fa4_1302_4657_99c5_a374868762a1"
      unitRef="pure">-0.010</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000083533Member"
      id="t_1_a8ed00fb_ec6a_23c8_f1fa_203a69f87dbf">Janus Henderson Venture Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000083533Member"
      id="t_2_e19b509d_2b23_ab92_ac11_cc1f90e27e10">Class D Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000083533Member"
      id="t_3_bffe0686_37b0_9e4e_32bc_00b596dcd050">JANVX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_4_c5fc17f0_6747_342c_0c4a_f97e504dd70b">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000083533Member"
      id="t_6_93f5e936_d131_50e2_bca4_c9517d7f5bb7">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_5_80da3beb_2901_9c41_d80d_1c8ee8b7b51b">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt;. You can also request this information by contacting us at 1-800-525-3713.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000083533Member"
      id="t_7_599806b2_df9f_d6a2_5ff4_dbcb7e2afb6c">janushenderson.com/reports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000083533Member"
      id="t_8_381e280b_151b_2f27_a9ec_5b31098aab18">1-800-525-3713</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_9_36054852_641f_29fd_4475_633746f86ae5">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class D Shares/JANVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;90&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000083533Member"
      decimals="INF"
      id="h_3426_c5e99c20_dcab_4e10_a3e9_c9fc240744db"
      unitRef="USD">90</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000083533Member"
      decimals="4"
      id="h_3427_0ae27141_d9c2_4d82_bfa3_54db799af3ac"
      unitRef="pure">0.0079</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_24_3a8292ff_09ca_4914_6d7e_8db08996d0b0">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class D Shares returned 27.69%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_23_6d07b216_70d3_771f_5576_0a0dcad1ca66">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275681.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_11_53d76cc6_ccdd_1044_7d99_c13306abc2b7">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class D Shares/JANVX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      id="h_3428_b2e57382_4b8b_47e2_9927_a85e96b13191"
      unitRef="pure">0.2769</oef:AvgAnnlRtrPct>
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      id="h_3429_53506ee7_2c62_4a35_9145_08ea3d555aa8"
      unitRef="pure">0.0899</oef:AvgAnnlRtrPct>
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      id="h_3430_7c54137e_b0d5_4fec_9733_391e4199e587"
      unitRef="pure">0.0994</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell3000IndexMember"
      id="t_21_4c2086e7_1ce3_7cf1_3619_3b34ac6c4221">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
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      id="h_3431_0e44e80e_262e_424f_a060_40a111479cae"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_3432_7f2c9eea_536f_4ea6_873a_eb9d41cffb15"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3433_ef38a041_ab77_478a_af0e_6302a481555e"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_20_806414cd_e620_9227_9f33_885cf541a2fb">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3434_a86e8cbf_db1d_4a0a_bbe2_3bf5390b152f"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3435_aefcbda1_8314_4ec2_b6c9_c644dcc896a1"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3436_cb36376a_0791_4e1b_b21d_0954bd48fe8c"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_Russell2000IndexMember"
      id="t_19_badc8302_87b6_6d19_8ce7_1da4782fa0e1">Russell 2000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3437_e40c3fc1_e3e3_457e_bf8f_507874cc7442"
      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3438_14a2462e_a7fd_4b46_ad6d_c1bd1cdee175"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3439_43510ba1_ee0b_4335_b00c_1bc208aa3dd8"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000083533Member"
      id="t_12_bc671fdb_1217_daae_4dd9_a949529cfa5f">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_13_713bb8bb_d95b_8fbe_d34a_5e404911a990">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/reports&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_14_0d8e91aa_5b5f_7005_2ffb_04e6516566c1">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_15_be05d47b_e7b8_5863_3721_80ad7739caf3">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000083533Member"
      decimals="INF"
      id="h_3440_737b0f95_87a4_4ff4_928e_5fb38db8b51f"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000083533Member"
      decimals="INF"
      id="h_3441_2e84a9be_41e8_452d_822f_8c75e916f7ff"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000083533Member"
      decimals="INF"
      id="h_3442_b92d34c7_cb9c_4a26_a1ff_0e1aee66ffc6"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000083533Member"
      decimals="4"
      id="h_3443_d5422c91_aa09_45cf_ba1f_5eb3a3af16bf"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_16_ce56cf29_92c4_86ce_68b1_89b7c22be957">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275691.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000083533Member"
      id="t_17_12d36f87_472f_f47e_b941_d3bad24c9d4c">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="t_1_4eaed3d0_e1b4_3c0d_2160_dc1ab4caefa3">Janus Henderson Venture Fund</oef:FundName>
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      contextRef="FY2024_C000100477Member"
      id="t_4_6ec20f01_56c7_0c5d_8455_d9a602da889f">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
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      contextRef="FY2024_C000100477Member"
      id="t_5_1c1df105_7ec9_f816_4992_5685205dc04a">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class I Shares/JVTIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;87&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000100477Member"
      id="t_24_21925144_0916_9ef6_1195_102ff41f3713">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class I Shares returned 27.73%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275720.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class I Shares/JVTIX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3467_7660c1c0_7199_4fc9_bbe3_68f07e38212e"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3468_d190d0a1_5e7d_4b1e_a43f_e33ed462eaa4"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000100477Member"
      id="t_12_23ab545b_3b76_62f9_96d2_d90bb8b43096">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000100477Member"
      id="t_13_250a5df5_d75b_0966_b53c_a0d52c451e8b">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000100477Member"
      id="t_14_4fe9e68c_9ef8_7e3c_f73c_f48a073032b6">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000100477Member"
      id="t_15_d1a7f4af_640c_b1bb_9801_db46e4e40e70">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000100477Member"
      decimals="INF"
      id="h_3469_6558a113_e443_456b_b128_07e3175ca637"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000100477Member"
      decimals="INF"
      id="h_3470_9f85271e_fdc6_4610_b639_580443e2846f"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000100477Member"
      decimals="INF"
      id="h_3471_93014adc_152a_4d4a_9a4e_7a675d778350"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000100477Member"
      decimals="4"
      id="h_3472_254e96ce_6d24_4c48_bc9c_b23afd0683cc"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000100477Member"
      id="t_16_3c719527_9c87_aca3_0035_04952d5b8b6a">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275730.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000100477Member"
      id="t_17_9fdcc442_f6ff_443f_f405_35a148c00d2a">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_3473_892081b4_ab33_4df0_a6ac_811d4d95d37e"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3474_c71d7c68_db47_402a_8158_282f8202863d"
      unitRef="pure">0.021</oef:PctOfNav>
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      contextRef="TI20240930_C000100477Member_VaxcyteIncMember"
      decimals="4"
      id="h_3475_3cbb0ddf_17ff_4941_a9a0_cf27df5a16c5"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_DescartesSystemsGroupIncTheMember"
      decimals="4"
      id="h_3476_28585f5e_dbef_4658_bc24_b85bca81000e"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_BlackbaudIncMember"
      decimals="4"
      id="h_3477_bbb37dc9_4293_42c4_9cf1_82a0f5d55142"
      unitRef="pure">0.017</oef:PctOfNav>
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      contextRef="TI20240930_C000100477Member_CommonStockMember"
      decimals="4"
      id="h_3478_afe8c003_6354_46b7_8e87_78a16b48f631"
      unitRef="pure">0.986</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3479_00ea9c33_db11_4642_8338_c6eff601e731"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3480_93b8dc04_cee5_42bc_80a8_81064193514d"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3481_dc82cade_9dec_418b_96b7_433f724b1643"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_WarrantsMember"
      decimals="4"
      id="h_3482_afaa3a35_621f_400a_9629_13068bf0a6f3"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100477Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3483_95a42351_5bdc_4c0e_9784_303a30a947e9"
      unitRef="pure">-0.010</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000114881Member"
      id="t_1_065f6c9b_3cc2_5464_6fbe_e036be13054a">Janus Henderson Venture Fund</oef:FundName>
    <oef:ClassName
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      id="t_2_001720b9_ebf2_585a_7320_86d2eb69bd3d">Class N Shares</oef:ClassName>
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      contextRef="FY2024_C000114881Member"
      id="t_3_2d9099b3_0325_35ba_6db0_238ad87bf99e">JVTNX</dei:TradingSymbol>
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      contextRef="FY2024_C000114881Member"
      id="t_5_7e051749_3c68_6a31_4708_69a73a9e391d">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000114881Member"
      id="t_4_6b0982cd_5381_eafc_edb6_a53c6f739e4d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_6_269ce35a_c259_8673_5e07_0609fa857ed8">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000114881Member"
      id="t_7_c25c8989_b97d_334e_6c3e_49cb299e6ea9">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000114881Member"
      id="t_8_2b6478ac_a226_fabe_b873_0b5222ea7e70">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_9_7486af55_5d82_3965_6ef7_581a29aeda9d">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class N Shares/JVTNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;76&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000114881Member"
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      id="h_3484_92c18161_81af_44b7_a8ef_33df1784fae2"
      unitRef="USD">76</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000114881Member"
      decimals="4"
      id="h_3485_b54c2eb0_650a_448e_b965_511d65fe3a51"
      unitRef="pure">0.0067</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_24_62278caa_971b_34d0_e28b_b3033ba6817c">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class N Shares returned 27.85%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2024_C000114881Member"
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275759.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_11_f4cb250a_88fe_2e5c_8b12_760cff7a83ef">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class N Shares/JVTNX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;10.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_3486_0600f665_d336_4eab_b786_b74c4619f331"
      unitRef="pure">0.2785</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000114881Member"
      decimals="4"
      id="h_3487_73d2e704_8265_4e12_b91a_29cf3e9a6060"
      unitRef="pure">0.0913</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000114881Member"
      decimals="4"
      id="h_3488_672401e8_a442_40b4_b065_6493bf7e4530"
      unitRef="pure">0.1009</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_19_4ec2b9c8_3752_963e_7063_ca9dd8d96574">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3489_5d785b89_68fd_4d95_a104_ed9576ead220"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3490_66fc0238_eb3b_4740_831e_8df1ae5ce85f"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3491_9244daa0_4d8e_4444_9732_19c8e6082dc5"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_20_c13c50ef_fb0a_f8af_8d11_0b24a6874b3f">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3492_88286f5c_bac0_4db4_8fd7_0a638e7e3aec"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3493_e44baa15_0dbf_4398_bd2e_4038937eb23f"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3494_777f36e6_a8ae_42d4_9687_c8737c5d1376"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000IndexMember"
      id="t_21_b502c84a_4b43_cb3d_3488_b19513aaab41">Russell 2000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3495_7b4f4763_b7ad_4627_b6cc_9b557b8b8fb8"
      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3496_976e3d96_bc6b_4f0d_ac63_65060da76cea"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3497_dfac0b4f_c8e8_4a20_9482_4bb0e5a2f392"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000114881Member"
      id="t_12_82536021_6ed1_fd71_a76d_03de5b14c6d3">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_13_6ef0fe08_6791_0e7b_1aa4_886ade63ba07">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_14_df1ee4b8_a41b_e078_7cf0_afc333464a4e">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_15_189f2e9a_5c74_092c_d583_1cc498f568b0">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000114881Member"
      decimals="INF"
      id="h_3498_a7dcca9d_841d_4d91_b963_170b66ccc867"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000114881Member"
      decimals="INF"
      id="h_3499_c8fbfc77_2a23_4d95_bbbb_3abd51c22d73"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000114881Member"
      decimals="INF"
      id="h_3500_698304f5_c7fd_44ea_a315_baa9eff00a8b"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000114881Member"
      decimals="4"
      id="h_3501_11e412d5_7fd2_49fd_a2d6_240581910c63"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000114881Member"
      id="t_16_20ddb8ea_611f_4daa_e668_68a72ce15f32">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275769.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
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&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_StrideIncMember"
      decimals="4"
      id="h_3502_649c3391_e7f3_4dc7_843e_a713d3db5243"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3503_43183d9b_1309_4341_a278_ff8974a6930d"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_VaxcyteIncMember"
      decimals="4"
      id="h_3504_70777fe2_c38a_4fa2_b300_f21797e537a8"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_DescartesSystemsGroupIncTheMember"
      decimals="4"
      id="h_3505_83fd7331_bac8_47f9_8284_2d6f157c5e61"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_BlackbaudIncMember"
      decimals="4"
      id="h_3506_97d305b4_486d_4697_a098_ecb93d1b8fd4"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_CommonStockMember"
      decimals="4"
      id="h_3507_d7d439c0_0fe0_4da3_9927_a2b6e5694cfb"
      unitRef="pure">0.986</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3508_ad2ce6e7_3731_4193_8abd_1b53d3e4bb7a"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3509_ed025d83_3c16_4464_8389_46a18178d4df"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3510_aab609aa_1a91_4521_97be_f97c5019504f"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_WarrantsMember"
      decimals="4"
      id="h_3511_e88a1da2_2064_4e49_a5d6_5b84fbde5fa9"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000114881Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3512_0daab165_ad02_4c77_bcd9_d35036596e96"
      unitRef="pure">-0.010</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000100478Member"
      id="t_1_83bbaab9_827c_7c3c_712f_cfecde1c30ca">Janus Henderson Venture Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000100478Member"
      id="t_2_21aec90c_b4be_8221_d7ab_ac22fe877472">Class S Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000100478Member"
      id="t_3_77c790e1_aac7_8fea_4e5c_8d032508cdd2">JVTSX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_5_85b5a9bc_7aa2_9027_6ea5_dc6d44bd7fc2">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000100478Member"
      id="t_4_9b6163f2_ca04_b360_2f84_a475d3c9400d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_6_1670fa3f_17b3_29fb_e5d2_bcb32ece4d03">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000100478Member"
      id="t_7_1247276a_1647_a9a5_ef92_b8342fbaab0c">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000100478Member"
      id="t_8_3bcc11a3_1698_3e29_04bc_1b93ebf3f3ec">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_9_fedab0fb_d1bf_7f21_b67d_8f5457563f24">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class S Shares/JVTSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;133&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;1.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000100478Member"
      decimals="INF"
      id="h_3513_e486b7b2_ed85_48e0_912f_a0a67c60c37d"
      unitRef="USD">133</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000100478Member"
      decimals="4"
      id="h_3514_cd800a54_101f_415d_9e2e_fc2d3043a83c"
      unitRef="pure">0.0117</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_24_7560a8b3_bb9c_cf7d_6df1_678bc4913dee">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class S Shares returned 27.21%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275798.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_11_59e3629d_f045_b359_962e_90c094bcf06f">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class S Shares/JVTSX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000100478Member"
      id="t_18_6b2b63dd_27b7_c822_42ec_676ebe0dbcf8">Janus Henderson Venture Fund (Class S Shares/JVTSX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000100478Member"
      decimals="4"
      id="h_3515_cdd5198b_ff79_4429_a8ea_020f3fcfad72"
      unitRef="pure">0.2721</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000100478Member"
      decimals="4"
      id="h_3516_1a718d8b_d777_46f4_bf90_0c2be747951f"
      unitRef="pure">0.0858</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000100478Member"
      decimals="4"
      id="h_3517_feac9b40_1699_4cff_9b2b_aec8f311f0be"
      unitRef="pure">0.0954</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_19_2a8505dd_3708_afd5_ea16_a82081032354">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3518_16e5d834_863a_4c48_9266_269e25ac186f"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3519_7132c931_0890_47c8_a140_09bcc948260f"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3520_4e66ef8d_cd0f_4149_bd0f_7ac9047666c9"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_20_d273f7ca_8650_3ea9_2eba_31d629fcb898">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3521_6a797e5d_7504_4b15_8953_63a9fc8da35d"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3522_9d24225c_c739_412e_8c0e_b89ec76bce14"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3523_0885e1f4_aac6_4a0f_83fe_ce22571197a7"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000IndexMember"
      id="t_21_da701d1c_fa00_a81e_e452_141daae4a62c">Russell 2000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3524_8186741a_4290_4eb1_b3ed_590d3015958a"
      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3525_ea011b8a_ab4e_4edf_aa74_f5c535dc6305"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3526_cb26e040_a56f_4c9a_af11_516f7329b598"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000100478Member"
      id="t_12_3c42b18f_ce61_353e_6f3c_b6c8faa566ad">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_13_0cae91e1_3307_8f62_bab5_db9134cded44">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_14_0b1c583e_96a5_8499_638b_44906cedff2a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_15_e71a98b6_e033_bec8_8fe8_7e053baff569">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000100478Member"
      decimals="INF"
      id="h_3527_1f7d03d3_e649_4301_8d4d_74d82a03eab9"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000100478Member"
      decimals="INF"
      id="h_3528_beca3473_d93d_4689_a02b_18912fe95a99"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000100478Member"
      decimals="INF"
      id="h_3529_0881398c_f63f_4711_8c8b_42fd2d859097"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000100478Member"
      decimals="4"
      id="h_3530_1914a9db_cc16_42fd_a4a5_0645bdf70315"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_16_a3f5dd5e_a58c_0c82_9e3b_7baa25f95740">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275808.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000100478Member"
      id="t_17_c033a34b_3eca_9ea8_b66f_110ba769304e">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_3531_6f95273f_f009_4cca_a2dc_2781086726bf"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3532_7aec79d9_a950_4d21_a69d_83dffe25f7ce"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_VaxcyteIncMember"
      decimals="4"
      id="h_3533_832231f4_0755_4cb8_afad_b5b8ca503f7b"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_DescartesSystemsGroupIncTheMember"
      decimals="4"
      id="h_3534_7cb2c698_1087_46f9_89c4_0bb825ab443f"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_BlackbaudIncMember"
      decimals="4"
      id="h_3535_13213063_74a8_4c3e_a2a8_4a5684205c4e"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_CommonStockMember"
      decimals="4"
      id="h_3536_e2dcde0b_4abf_479d_9975_8fecb4b0d9c0"
      unitRef="pure">0.986</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_InvestmentCompaniesMember"
      decimals="4"
      id="h_3537_46adece0_aedc_4632_ad3e_99ab82177fbb"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_InvestmentsPurchasedWithCashCollateralFromSecuritiesLendingMember"
      decimals="4"
      id="h_3538_ff9b4d2b_afe9_428e_a6b0_ce8b5560ec1e"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_PrivatePlacementsMember"
      decimals="4"
      id="h_3539_5a9124b0_3f3a_4a5c_b3db_1197c655a8a7"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_WarrantsMember"
      decimals="4"
      id="h_3540_fe51373b_414d_42cf_b931_6064447899fe"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000100478Member_OtherInvestmentsMember"
      decimals="4"
      id="h_3541_7684a6ea_6b5a_448c_814d_e752731f4337"
      unitRef="pure">-0.010</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2024_C000028950Member"
      id="t_1_0e000e89_a356_4eb7_b5c1_042875bc69a4">Janus Henderson Venture Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2024_C000028950Member"
      id="t_2_06b72cc3_0e09_cef8_011e_88ba238bc5d3">Class T Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2024_C000028950Member"
      id="t_3_2157c189_e3f2_becb_3acd_d5b7033cd034">JAVTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_5_88937ee9_f17d_3a97_cb9e_9aa40c2204fb">This annual shareholder report contains important information about the Janus Henderson Venture Fund (the "Fund&#x201d;) for the period of October 1, 2023 to September 30, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2024_C000028950Member"
      id="t_4_cd10bd68_2b70_240b_6a37_3e6b74a89735">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_6_a77c80c5_cd77_4fdb_b685_a8f7ce730095">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt;. You can also request this information by contacting us at 1-877-335-2687.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2024_C000028950Member"
      id="t_7_5fe18560_2d09_c3e3_2d82_7b0da9d4b6bb">janushenderson.com/info</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2024_C000028950Member"
      id="t_8_2b600c49_8b2f_ce53_c903_579ba6871264">1-877-335-2687</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_9_f755efbb_7f39_db46_b4d3_2c7cd1ccb36e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What were the costs for the&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;year?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt;"&gt;&lt;i&gt;(Based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Fund (Class)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost of a &lt;br/&gt;$10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Cost paid as a percentage&lt;br/&gt;of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund&lt;br/&gt;(Class T Shares/JAVTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;102&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Roboto'; color: #393d47; font-size: 9pt; vertical-align: bottom; padding: 6pt 3pt 3pt 3pt;"&gt;0.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2024_C000028950Member"
      decimals="INF"
      id="h_3542_d4e76166_0fc2_484e_8b76_c22590ad5974"
      unitRef="USD">102</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2024_C000028950Member"
      decimals="4"
      id="h_3543_568671c5_9ca9_4210_b6a3_8a9918bcd993"
      unitRef="pure">0.0090</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_24_ed38666f_eca0_e690_b573_3db974de1925">&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 14pt;"&gt;What impacted Fund performance over the reporting period?&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;For the 12-month period ended September 30, 2024, the Janus Henderson Venture Fund Class T Shares returned 27.56%. Its broad-based benchmark, the Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 35.19%. Its performance benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index, returned 27.66%. Its additional benchmark, the Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, returned 26.76%.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Contributors to Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Stride was a top contributor to returns relative to the performance benchmark. The education services company reported positive earnings, supported by strong student enrollment and retention metrics for its K-12 remote learning platform. AST SpaceMobile, another contributor, is an early-stage communications services company that has secured major contracts and funding to support its development of a low-orbit satellite network.&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: uppercase; font-size: 10pt; margin-bottom: 3pt; font-weight: bold;"&gt;Top Detractors from Performance&lt;/div&gt;&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;Rentokil Initial was a notable detractor from returns relative to the performance benchmark. The consumer services company faced revenue and earnings headwinds because of the slower-than-expected integration of its U.S. Terminix pest control business. ON Semiconductor, another detractor, reported weaker business trends due to slowing in the electric vehicle market.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_23_3462e154_5505_2ed1_bd0b_4726f6dc8a24">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;Total return based on a $10,000 investment&lt;/div&gt;

&lt;div style="margin-top: 0px; font-family: 'roboto'; color: #393d47; font-size: 10pt; margin-bottom: 10pt;"&gt;September 30, 2014, through September 30, 2024&lt;/div&gt;

&lt;div style="margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_275837.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_11_b3985ac9_d580_7da8_56cd_8319aa34da80">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 1pt; height: 20pt; border-bottom-color: #f06c00;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; text-align: left; width: 60%; padding: 6pt 3pt 3pt 3pt;"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; font-weight: bold; padding: 6pt 3pt 3pt 3pt;"&gt;10 Year&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Janus Henderson Venture Fund (Class T Shares/JAVTX)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;35.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;15.26&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;12.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;27.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: #393d47; font-size: 9pt; font-family: 'Roboto'; font-weight: normal; padding: 6pt 3pt 3pt 3pt;"&gt;Russell 2000&lt;sup&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;26.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;9.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 3pt;"&gt;8.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_C000028950Member"
      id="t_12_4ec1d7e2_951f_336c_db83_f0a7dee46970">Janus Henderson Venture Fund (Class T Shares/JAVTX)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_3544_c98817ee_6786_420c_ae1d_d041bb67bd83"
      unitRef="pure">0.2756</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000028950Member"
      decimals="4"
      id="h_3545_51d24301_0118_4f7d_b3a3_e72eb855fdaa"
      unitRef="pure">0.0887</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000028950Member"
      decimals="4"
      id="h_3546_054b70da_45dc_4e06_be23_77901a843882"
      unitRef="pure">0.0983</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell3000IndexMember"
      id="t_13_181e31b3_8a2d_05b6_be17_3fd691941e8a">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3547_97c08b60_1a54_46d4_9ac8_e74441105705"
      unitRef="pure">0.3519</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3548_1be21814_ff4c_4b7c_b47d_fe2ad3f2c7f5"
      unitRef="pure">0.1526</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell3000IndexMember"
      decimals="4"
      id="h_3549_317841e8_2c92_4e7e_a174_f1b5c88d9d60"
      unitRef="pure">0.1283</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000GrowthIndexMember"
      id="t_14_0206d398_5007_a75f_c623_d5d767033a7f">Russell 2000&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3550_7a8bcb2f_82ba_4151_ba5f_4779f4539511"
      unitRef="pure">0.2766</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3551_c62c39c0_6fdc_4b2d_812c_7ef7ad2249be"
      unitRef="pure">0.0882</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000GrowthIndexMember"
      decimals="4"
      id="h_3552_06fc1fd3_3ff8_42b0_81c0_2d6749200b25"
      unitRef="pure">0.0895</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2024_Russell2000IndexMember"
      id="t_15_70117b21_34de_543d_d0e8_a41a39599473">Russell 2000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3553_1afead5c_e228_4124_86b2_94800ae9bfe8"
      unitRef="pure">0.2676</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3554_edf6e115_1285_4ccf_a38f_863e74acf204"
      unitRef="pure">0.0939</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_Russell2000IndexMember"
      decimals="4"
      id="h_3555_8aaea651_6cee_402b_ba5c_5c0a44e0fb4b"
      unitRef="pure">0.0878</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2024_C000028950Member"
      id="t_16_af6259c3_195d_9e24_a027_a0ef8587ceed">
Keep in mind that the Fund&#x2019;s past performance is not a good predictor of how the Fund will perform in the future.
</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_17_3928615b_bc06_dda8_6b6d_6090da8e9f2a">Visit &lt;span style="text-decoration-line: underline; color: #393d47; font-family: 'roboto'; font-size: 10pt;"&gt;janushenderson.com/info&lt;/span&gt; for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_18_da07f42e_cce6_9d31_3ea8_543f9c96085a">The graph and table include reinvestment of all dividends and distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemptions of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_19_7da37194_95bc_7591_3160_b75d6b956c4f">
&lt;div style="font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt; margin-top: 10pt;"&gt;Key Fund Statistics&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,242M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;140&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Total investment advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;19.2M&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; color: #393d47; font-size: 9pt; width: 40%; text-align: left; font-family: 'Roboto'; font-weight: normal; padding: 6pt 10pt 3pt 10pt;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 10pt 3pt 10pt;"&gt;18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240930_C000028950Member"
      decimals="INF"
      id="h_3556_05341318_f2b6_42f4_b40f_a60e9552ed50"
      unitRef="USD">3242000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240930_C000028950Member"
      decimals="INF"
      id="h_3557_ed0ff71b_7bef_440a_8dde_3b13d21f49c6"
      unitRef="Holding">140</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2024_C000028950Member"
      decimals="INF"
      id="h_3558_b42b171e_53c7_4d27_ac0f_2cff5ee40dbf"
      unitRef="USD">19200000</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2024_C000028950Member"
      decimals="4"
      id="h_3559_408643c4_59c8_4f56_ab63_c45672abe107"
      unitRef="pure">0.18</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_20_06fca525_d722_4c57_17a0_7da07f85f65e">
&lt;div style="margin-top: 0px; font-family: 'poppins'; color: #393d47; font-size: 11.52pt; font-weight: bold; margin-bottom: 3pt;"&gt;What did the Fund invest in?&lt;/div&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;



&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Asset Allocation (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;98.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investment Companies&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;1.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Investments Purchased with Cash Collateral from Securities Lending&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Private Placements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.6&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Warrants&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;0.0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; text-align: left; padding: 1pt 3pt 1pt 3pt;"&gt;Other&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 1pt 3pt 1pt 3pt;"&gt;(1.0&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;Top Country Allocations (% of investments)&lt;/div&gt;

&lt;div style="padding-left: 10pt; padding-right: 0px;"&gt;&lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_275847.jpg" style="width: 172.8pt;"/&gt; &lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2024_C000028950Member"
      id="t_21_76396b7b_29e2_dc72_8c1e_0f1d46286afc">
&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'roboto'; color: #393d47; letter-spacing: 1.25px; text-transform: none; font-size: 9pt; border-bottom-color: #f06c00; text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt; font-weight: bold;"&gt;5 Largest Equity Holdings (% of net assets)&lt;/div&gt;

&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;

&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Stride Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;SS&amp;amp;C Technologies Holdings Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Vaxcyte Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;2.1&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: 20pt; border-bottom-color: #393d47;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Descartes Systems Group Inc/The&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.9&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 3pt 3pt 12pt;"&gt;Blackbaud Inc&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Roboto'; color: #393d47; font-size: 9pt; padding: 6pt 12pt 3pt 3pt;"&gt;1.7&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_StrideIncMember"
      decimals="4"
      id="h_3560_601f1ed1_11f3_4abe_a49f_b5d08b004180"
      unitRef="pure">0.024</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_SSAndCTechnologiesHoldingsIncMember"
      decimals="4"
      id="h_3561_d1015dcc_4991_46df_ad7f_b544c615cb0a"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_VaxcyteIncMember"
      decimals="4"
      id="h_3562_52cd6389_d6cf_4ec1_b869_7fb06511a263"
      unitRef="pure">0.021</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_DescartesSystemsGroupIncTheMember"
      decimals="4"
      id="h_3563_f1a1f965_33fa_414b_a73c_059459fde14d"
      unitRef="pure">0.019</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_BlackbaudIncMember"
      decimals="4"
      id="h_3564_6328673b_350e_4cd8_af8b_80f92fe428cf"
      unitRef="pure">0.017</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_CommonStockMember"
      decimals="4"
      id="h_3565_b170347d_1a07_4988_b2fd_c6edb6d76676"
      unitRef="pure">0.986</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20240930_C000028950Member_InvestmentCompaniesMember"
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