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    <dei:AmendmentFlag contextRef="P11_01_2023To10_31_2024" id="ixv-14526">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="P11_01_2023To10_31_2024" id="ixv-14527">0000910682</dei:EntityCentralIndexKey>
    <dei:EntityInvCompanyType contextRef="P11_01_2023To10_31_2024" id="hidden2505180">N-1A</dei:EntityInvCompanyType>
    <dei:DocumentType contextRef="P11_01_2023To10_31_2024" id="ixv-22">N-CSR</dei:DocumentType>
    <dei:EntityRegistrantName contextRef="P11_01_2023To10_31_2024" id="ixv-15693">Delaware Group Adviser Funds</dei:EntityRegistrantName>
    <dei:DocumentPeriodEndDate contextRef="P11_01_2023To10_31_2024" id="ixv-15694">2024-10-31</dei:DocumentPeriodEndDate>
    <oef:FundName
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15695">Delaware Diversified Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15696">Class A</oef:ClassName>
    <dei:TradingSymbol
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15697">DPDFX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15698">This annual shareholder report contains important information about Delaware Diversified Income Fund (Fund) for the period of November 1, 2023, to October 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15699">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-88">You can find additional information about the Fund at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature.&lt;/div&gt; You can also request this information by contacting us at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;800 523-1918&lt;/div&gt;, weekdays from &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;8:30am to 6:00pm ET.&lt;/div&gt;</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15700">delawarefunds.com/literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15701">800 523-1918</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15702">This report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-98"> &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;What were the&#160; Fund's costs for the last 12 months ? &lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; margin-bottom: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt;"&gt;&lt;div style="font-style:italic;display:inline;"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt; &lt;/div&gt;
&lt;table style="text-align:start; break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center;"&gt;Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;74&lt;/td&gt;
&lt;td style="break-inside: avoid-page; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;0.70&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
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      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      decimals="0"
      id="ixv-15703"
      unitRef="Unit_USD">74</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      decimals="INF"
      id="ixv-15704"
      unitRef="Unit_pure">0.007</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-118">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 14pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Management's discussion of&lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;Fund performance&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Performance highlights&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;Delaware Diversified Income Fund (Class A) returned 12.25% (excluding sales charge) for the 12 months ended &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;October 31, 2024.&lt;/div&gt; During the same period, the Bloomberg US Aggregate Index, the Fund's broad-based securities market index, returned 10.55%.&lt;/div&gt;  &lt;div style="null;text-indent: 0px;"&gt; &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;text-indent: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top contributors to performance:&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Treasury yields fluctuated over the 12-month reporting period but ended lower as the US Federal Reserve (Fed) eventually cut interest rates. The Fund adjusted accordingly, and its positioning across the yield curve contributed to performance&lt;div style="display:inline;"&gt;.&lt;/div&gt;&lt;br/&gt;&lt;/div&gt;&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Allocations to the corporate bond and structured finance sectors contributed to the Fund&#x2019;s performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="null;text-indent: 0px;"&gt; &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;text-indent: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top detractors from performance:&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within the agency mortgage-backed securities (MBS) market, particularly the 30-year conventional lower coupons, detracted from performance. Overall mortgage rates depressed prepayments, adversely affecting agency MBS performance.&#160;&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Higher volatility over the reporting period adversely affected the performance of the Fund's agency MBS holdings.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within investment grade public corporates, especially allocations within the cable and satellite industry group, detracted from performance.&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-168">
&lt;img alt="Fund Performance - Growth of 10K" src="g819201chartimages_9125782.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-171">
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-indent: 0; width: 60%; line-height: 12pt; text-align: left;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;Average annual total returns &lt;/div&gt;(&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;as of &lt;/div&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;October 31, 2024&lt;/div&gt;)&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;1 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;5 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;10 year&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class A) &#x2013; including sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;7.25&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.44&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.29&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class A) &#x2013; excluding sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;12.25&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.49&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.76&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Bloomberg US Aggregate Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;10.55&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.23&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.49&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15705">Delaware Diversified Income Fund (Class A) &#x2013; including sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      decimals="INF"
      id="ixv-15706"
      unitRef="Unit_pure">0.0725</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010956MemberoefClassAxis"
      decimals="INF"
      id="ixv-15707"
      unitRef="Unit_pure">-0.0044</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010956MemberoefClassAxis"
      decimals="INF"
      id="ixv-15708"
      unitRef="Unit_pure">0.0129</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      id="ixv-15709">Delaware Diversified Income Fund (Class A) &#x2013; excluding sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15710"
      unitRef="Unit_pure">0.1225</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010956MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15711"
      unitRef="Unit_pure">0.0049</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010956MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15712"
      unitRef="Unit_pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      id="ixv-15713">Bloomberg US Aggregate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15714"
      unitRef="Unit_pure">0.1055</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15715"
      unitRef="Unit_pure">-0.0023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15716"
      unitRef="Unit_pure">0.0149</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-219">Keep in mind that the  Fund's  past performance is not a good predictor of how the  Fund  will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-229">Visit delawarefunds.com/performance&lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15717">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-233"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; statistics &lt;/div&gt;(as of October 31, 2024)&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;3,011,179,121&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;900 &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total advisory fees paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;8,931,520&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;106&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis"
      decimals="0"
      id="ixv-15718"
      unitRef="Unit_USD">3011179121</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis"
      decimals="0"
      id="ixv-15719"
      unitRef="Unit_Holding">900</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      decimals="0"
      id="ixv-15720"
      unitRef="Unit_USD">8931520</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      decimals="INF"
      id="ixv-15721"
      unitRef="Unit_pure">1.06</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-258"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; holdings&lt;/div&gt; (as of October 31, 2024)&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund.&lt;/div&gt; &lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'Arial'; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; border-bottom-color: rgb(0, 0, 0); text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;32.73&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Agency Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;27.60&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;US Treasury Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;15.23&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;8.03&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Loan Agreements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.94&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Asset-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.75&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Collateralized Mortgage Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;2.84&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Short-Term Investments&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.86&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Collateralized Debt Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.25&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.18&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_CorporateBondSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15722"
      unitRef="Unit_pure">0.3273</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_AgencyMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis_C000010956MemberoefClassAxis"
      decimals="INF"
      id="ixv-15723"
      unitRef="Unit_pure">0.276</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_USTreasuryObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15724"
      unitRef="Unit_pure">0.1523</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_NonAgencyCommercialMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15725"
      unitRef="Unit_pure">0.0803</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_LoanAgreementsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15726"
      unitRef="Unit_pure">0.0394</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_NonAgencyAssetBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15727"
      unitRef="Unit_pure">0.0375</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_NonAgencyCollateralizedMortgageObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15728"
      unitRef="Unit_pure">0.0284</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_ShortTermInvestmentMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15729"
      unitRef="Unit_pure">0.0186</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_CollateralizedDebtObligationMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15730"
      unitRef="Unit_pure">0.0125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010956MemberoefClassAxis_SovereignBondsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15731"
      unitRef="Unit_pure">0.0118</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-315">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Material Fund changes&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;Effective July 26, 2024, the Fund introduced a revised fee waiver for Class A shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.&lt;/div&gt; </oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15732">Effective July 26, 2024, the Fund introduced a revised fee waiver for Class A shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15733">2024-07-26</oef:MaterialChngDate>
    <oef:SummaryOfChngLegendTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-321">This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.</oef:SummaryOfChngLegendTextBlock>
    <oef:UpdProspectusWebAddress
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15734">delawarefunds.com/literature</oef:UpdProspectusWebAddress>
    <oef:UpdProspectusPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010956MemberoefClassAxis"
      id="ixv-15735">800 523-1918</oef:UpdProspectusPhoneNumber>
    <oef:FundName
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15736">Delaware Diversified Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15737">Class C</oef:ClassName>
    <dei:TradingSymbol
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15738">DPCFX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15739">This annual shareholder report contains important information about Delaware Diversified Income Fund (Fund) for the period of November 1, 2023, to October 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15740">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-367">You can find additional information about the Fund at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature.&lt;/div&gt; You can also request this information by contacting us at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;800 523-1918&lt;/div&gt;, weekdays from &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;8:30am to 6:00pm ET.&lt;/div&gt;</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15741">delawarefunds.com/literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15742">800 523-1918</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15743">This report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-377">&lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;What were the&#160; Fund's costs for the last 12 months ? &lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; margin-bottom: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt;"&gt;&lt;div style="font-style:italic;display:inline;"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt; &lt;/div&gt;
&lt;table style="text-align:start; break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center;"&gt;Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;153&lt;/td&gt;
&lt;td style="break-inside: avoid-page; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;1.45&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      decimals="0"
      id="ixv-15744"
      unitRef="Unit_USD">153</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      decimals="INF"
      id="ixv-15745"
      unitRef="Unit_pure">0.0145</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-397">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 14pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Management's discussion of&lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;Fund performance&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Performance highlights&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;Delaware Diversified Income Fund (Class C) returned 11.26% (excluding sales charge) for the 12 months ended &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;October 31, 2024.&lt;/div&gt; During the same period, the Bloomberg US Aggregate Index, the Fund's broad-based securities market index, returned 10.55%.&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;text-indent: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top contributors to performance:&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Treasury yields fluctuated over the 12-month reporting period but ended lower as the US Federal Reserve (Fed) eventually cut interest rates. The Fund adjusted accordingly, and its positioning across the yield curve contributed to performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Allocations to the corporate bond and structured finance sectors contributed to the Fund&#x2019;s performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;text-indent: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top detractors from performance:&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within the agency mortgage-backed securities (MBS) market, particularly the 30-year conventional lower coupons, detracted from performance. Overall mortgage rates depressed prepayments, adversely affecting agency MBS performance.&#160;&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Higher volatility over the reporting period adversely affected the performance of the Fund's agency MBS holdings.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within investment grade public corporates, especially allocations within the cable and satellite industry group, detracted from performance.&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-444">
&lt;img alt="Fund Performance - Growth of 10K" src="g819201chartimages_9125820.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-447">
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-indent: 0; width: 60%; line-height: 12pt; text-align: left;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;Average annual total returns &lt;/div&gt;(&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;as of &lt;/div&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;October 31, 2024&lt;/div&gt;)&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;1 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;5 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;10 year&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class C) &#x2013; including sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;10.26 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.29 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.99 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class C) &#x2013; excluding sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;11.26&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.29&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.99&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Bloomberg US Aggregate Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;10.55 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.23 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.49 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15746">Delaware Diversified Income Fund (Class C) &#x2013; including sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      decimals="INF"
      id="ixv-15747"
      unitRef="Unit_pure">0.1026</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010958MemberoefClassAxis"
      decimals="INF"
      id="ixv-15748"
      unitRef="Unit_pure">-0.0029</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010958MemberoefClassAxis"
      decimals="INF"
      id="ixv-15749"
      unitRef="Unit_pure">0.0099</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      id="ixv-15750">Delaware Diversified Income Fund (Class C) &#x2013; excluding sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15751"
      unitRef="Unit_pure">0.1126</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010958MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15752"
      unitRef="Unit_pure">-0.0029</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010958MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15753"
      unitRef="Unit_pure">0.0099</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      id="ixv-15754">Bloomberg US Aggregate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15755"
      unitRef="Unit_pure">0.1055</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15756"
      unitRef="Unit_pure">-0.0023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15757"
      unitRef="Unit_pure">0.0149</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-495">Keep in mind that the  Fund's  past performance is not a good predictor of how the  Fund  will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-503">Visit delawarefunds.com/performance&lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15758">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-507"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; statistics &lt;/div&gt;(as of &lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;October &lt;/div&gt;31, 2024)&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;3,011,179,121&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;900 &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total advisory fees paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;8,931,520&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;106&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis"
      decimals="0"
      id="ixv-15759"
      unitRef="Unit_USD">3011179121</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis"
      decimals="0"
      id="ixv-15760"
      unitRef="Unit_Holding">900</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      decimals="0"
      id="ixv-15761"
      unitRef="Unit_USD">8931520</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      decimals="INF"
      id="ixv-15762"
      unitRef="Unit_pure">1.06</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-533"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; holdings&lt;/div&gt; (as of October 31, 2024)&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund.&lt;/div&gt; &lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'Arial'; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; border-bottom-color: rgb(0, 0, 0); text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;32.73&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Agency Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;27.60&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;US Treasury Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;15.23&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;8.03&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Loan Agreements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.94&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Asset-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.75&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Collateralized Mortgage Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;2.84&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Short-Term Investments&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.86&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Collateralized Debt Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.25&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.18&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_CorporateBondSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15763"
      unitRef="Unit_pure">0.3273</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_AgencyMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis_C000010958MemberoefClassAxis"
      decimals="INF"
      id="ixv-15764"
      unitRef="Unit_pure">0.276</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_USTreasuryObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15765"
      unitRef="Unit_pure">0.1523</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_NonAgencyCommercialMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15766"
      unitRef="Unit_pure">0.0803</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_LoanAgreementsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15767"
      unitRef="Unit_pure">0.0394</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_NonAgencyAssetBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15768"
      unitRef="Unit_pure">0.0375</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_NonAgencyCollateralizedMortgageObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15769"
      unitRef="Unit_pure">0.0284</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_ShortTermInvestmentMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15770"
      unitRef="Unit_pure">0.0186</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_CollateralizedDebtObligationMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15771"
      unitRef="Unit_pure">0.0125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010958MemberoefClassAxis_SovereignBondsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15772"
      unitRef="Unit_pure">0.0118</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-590">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Material Fund changes&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;Effective July 26, 2024, the Fund introduced a revised fee waiver for Class C shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.&lt;/div&gt; </oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15773">Effective July 26, 2024, the Fund introduced a revised fee waiver for Class C shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15774">2024-07-26</oef:MaterialChngDate>
    <oef:SummaryOfChngLegendTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-597">This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.</oef:SummaryOfChngLegendTextBlock>
    <oef:UpdProspectusWebAddress
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15775">delawarefunds.com/literature</oef:UpdProspectusWebAddress>
    <oef:UpdProspectusPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010958MemberoefClassAxis"
      id="ixv-15776">800 523-1918</oef:UpdProspectusPhoneNumber>
    <oef:FundName
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15777">Delaware Diversified Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15778">Class R</oef:ClassName>
    <dei:TradingSymbol
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15779">DPRFX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15780">This annual shareholder report contains important information about Delaware Diversified Income Fund (Fund) for the period of November 1, 2023, to October 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15781">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-642">You can find additional information about the Fund at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature.&lt;/div&gt; You can also request this information by contacting us at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;800 523-1918&lt;/div&gt;, weekdays from &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;8:30am to 6:00pm ET.&lt;/div&gt;</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15782">delawarefunds.com/literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15783">800 523-1918</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15784">This report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-652">&lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;What were the&#160; Fund's costs for the last 12 months ? &lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; margin-bottom: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt;"&gt;&lt;div style="font-style:italic;display:inline;"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt; &lt;/div&gt;
&lt;table style="text-align:start; break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center;"&gt;Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;Class R&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;101&lt;/td&gt;
&lt;td style="break-inside: avoid-page; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;0.95&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      decimals="0"
      id="ixv-15785"
      unitRef="Unit_USD">101</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      decimals="INF"
      id="ixv-15786"
      unitRef="Unit_pure">0.0095</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-672">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 14pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Management's discussion of&lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;Fund performance&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Performance highlights&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;Delaware Diversified Income Fund (Class R) returned 11.98% (excluding sales charge) for the 12 months ended &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;October 31, 2024.&lt;/div&gt; During the same period, the Bloomberg US Aggregate Index, the Fund's broad-based securities market index, returned 10.55%.&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top contributors to performance:&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Treasury yields fluctuated over the 12-month reporting period but ended lower as the US Federal Reserve (Fed) eventually cut interest rates. The Fund adjusted accordingly, and its positioning across the yield curve contributed to performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Allocations to the corporate bond and structured finance sectors contributed to the Fund&#x2019;s performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top detractors from performance:&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within the agency mortgage-backed securities (MBS) market, particularly the 30-year conventional lower coupons, detracted from performance. Overall mortgage rates depressed prepayments, adversely affecting agency MBS performance.&#160;&lt;br/&gt;&lt;/div&gt; &lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Higher volatility over the reporting period adversely affected the performance of the Fund's agency MBS holdings.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within investment grade public corporates, especially allocations within the cable and satellite industry group, detracted from performance.&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-725">
&lt;img alt="Fund Performance - Growth of 10K" src="g819201chartimages_9125858.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-728">
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-indent: 0; width: 60%; line-height: 12pt; text-align: left;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;Average annual total returns &lt;/div&gt;(&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;as of &lt;/div&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;October 31, 2024&lt;/div&gt;)&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;1 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;5 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;10 year&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class R) &#x2013; including sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;11.98 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.21 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.49 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class R) &#x2013; excluding sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;11.98&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.21&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.49&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Bloomberg US Aggregate Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;10.55 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.23 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.49 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15787">Delaware Diversified Income Fund (Class R) &#x2013; including sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      decimals="INF"
      id="ixv-15788"
      unitRef="Unit_pure">0.1198</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010959MemberoefClassAxis"
      decimals="INF"
      id="ixv-15789"
      unitRef="Unit_pure">0.0021</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010959MemberoefClassAxis"
      decimals="INF"
      id="ixv-15790"
      unitRef="Unit_pure">0.0149</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      id="ixv-15791">Delaware Diversified Income Fund (Class R) &#x2013; excluding sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15792"
      unitRef="Unit_pure">0.1198</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010959MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15793"
      unitRef="Unit_pure">0.0021</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010959MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15794"
      unitRef="Unit_pure">0.0149</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      id="ixv-15795">Bloomberg US Aggregate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15796"
      unitRef="Unit_pure">0.1055</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15797"
      unitRef="Unit_pure">-0.0023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15798"
      unitRef="Unit_pure">0.0149</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-776">Keep in mind that the  Fund's  past performance is not a good predictor of how the  Fund  will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-784">Visit delawarefunds.com/performance&lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15799">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-789"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; statistics &lt;/div&gt;(as of October 31, 2024)&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;3,011,179,121&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;900 &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total advisory fees paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;8,931,520&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;106&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis"
      decimals="0"
      id="ixv-15800"
      unitRef="Unit_USD">3011179121</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis"
      decimals="0"
      id="ixv-15801"
      unitRef="Unit_Holding">900</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      decimals="0"
      id="ixv-15802"
      unitRef="Unit_USD">8931520</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      decimals="INF"
      id="ixv-15803"
      unitRef="Unit_pure">1.06</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-814"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; holdings&lt;/div&gt; (as of October 31, 2024)&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund.&lt;/div&gt; &lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'Arial'; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; border-bottom-color: rgb(0, 0, 0); text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;32.73&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Agency Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;27.60&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;US Treasury Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;15.23&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;8.03&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Loan Agreements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.94&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Asset-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.75&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Collateralized Mortgage Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;2.84&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Short-Term Investments&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.86&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Collateralized Debt Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.25&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.18&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_CorporateBondSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15804"
      unitRef="Unit_pure">0.3273</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_AgencyMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis_C000010959MemberoefClassAxis"
      decimals="INF"
      id="ixv-15805"
      unitRef="Unit_pure">0.276</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_USTreasuryObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15806"
      unitRef="Unit_pure">0.1523</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_NonAgencyCommercialMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15807"
      unitRef="Unit_pure">0.0803</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_LoanAgreementsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15808"
      unitRef="Unit_pure">0.0394</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_NonAgencyAssetBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15809"
      unitRef="Unit_pure">0.0375</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_NonAgencyCollateralizedMortgageObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15810"
      unitRef="Unit_pure">0.0284</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_ShortTermInvestmentMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15811"
      unitRef="Unit_pure">0.0186</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_CollateralizedDebtObligationMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15812"
      unitRef="Unit_pure">0.0125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010959MemberoefClassAxis_SovereignBondsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15813"
      unitRef="Unit_pure">0.0118</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-871"> &lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Material Fund changes&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;Effective July 26, 2024, the Fund introduced a revised fee waiver for Class R shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.&lt;/div&gt; </oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15814">Effective July 26, 2024, the Fund introduced a revised fee waiver for Class R shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15815">2024-07-26</oef:MaterialChngDate>
    <oef:SummaryOfChngLegendTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-878">This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.</oef:SummaryOfChngLegendTextBlock>
    <oef:UpdProspectusWebAddress
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15816">delawarefunds.com/literature</oef:UpdProspectusWebAddress>
    <oef:UpdProspectusPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010959MemberoefClassAxis"
      id="ixv-15817">800 523-1918</oef:UpdProspectusPhoneNumber>
    <oef:FundName
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15818">Delaware Diversified Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15819">Institutional Class</oef:ClassName>
    <dei:TradingSymbol
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15820">DPFFX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15821">This annual shareholder report contains important information about Delaware Diversified Income Fund (Fund) for the period of November 1, 2023, to October 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15822">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-923">You can find additional information about the Fund at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature.&lt;/div&gt; You can also request this information by contacting us at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;800 523-1918&lt;/div&gt;, weekdays from &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;8:30am to 6:00pm ET.&lt;/div&gt;</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15823">delawarefunds.com/literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15824">800 523-1918</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15825">This report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-933">&lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;What were the&#160; Fund's costs for the last 12 months ? &lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; margin-bottom: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt;"&gt;&lt;div style="font-style:italic;display:inline;"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt; &lt;/div&gt;
&lt;table style="text-align:start; break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center;"&gt;Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;Institutional Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;48&lt;/td&gt;
&lt;td style="break-inside: avoid-page; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;0.45&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      decimals="0"
      id="ixv-15826"
      unitRef="Unit_USD">48</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      decimals="INF"
      id="ixv-15827"
      unitRef="Unit_pure">0.0045</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-953">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 14pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Management's discussion of&lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;Fund performance&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Performance highlights&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;Delaware Diversified Income Fund (Institutional Class) returned 12.53% (excluding sales charge) for the 12 months ended &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;October 31, 2024.&lt;/div&gt; During the same period, the Bloomberg US Aggregate Index, the Fund's broad-based securities market index, returned 10.55%.&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top contributors to performance:&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Treasury yields fluctuated over the 12-month reporting period but ended lower as the US Federal Reserve (Fed) eventually cut interest rates. The Fund adjusted accordingly, and its positioning across the yield curve contributed to performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Allocations to the corporate bond and structured finance sectors contributed to the Fund&#x2019;s performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top detractors from performance:&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within the agency mortgage-backed securities (MBS) market, particularly the 30-year conventional lower coupons, detracted from performance. Overall mortgage rates depressed prepayments, adversely affecting agency MBS performance.&#160;&lt;br/&gt;&lt;/div&gt; &lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Higher volatility over the reporting period adversely affected the performance of the Fund's agency MBS holdings.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within investment grade public corporates, especially allocations within the cable and satellite industry group, detracted from performance.&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1005">
&lt;img alt="Fund Performance - Growth of 10K" src="g819201chartimages_9125934.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1008">
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-indent: 0; width: 60%; line-height: 12pt; text-align: left;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;Average annual total returns &lt;/div&gt;(&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;as of &lt;/div&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;October 31, 2024&lt;/div&gt;)&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;1 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;5 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;10 year&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Institutional Class) &#x2013; including sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;12.53 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.71 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;2.00 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Institutional Class) &#x2013; excluding sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;12.53&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.71&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;2.00&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Bloomberg US Aggregate Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;10.55 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;-0.23 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.49 &lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15828">Delaware Diversified Income Fund (Institutional Class) &#x2013; including sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      decimals="INF"
      id="ixv-15829"
      unitRef="Unit_pure">0.1253</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010960MemberoefClassAxis"
      decimals="INF"
      id="ixv-15830"
      unitRef="Unit_pure">0.0071</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010960MemberoefClassAxis"
      decimals="INF"
      id="ixv-15831"
      unitRef="Unit_pure">0.02</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      id="ixv-15832">Delaware Diversified Income Fund (Institutional Class) &#x2013; excluding sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15833"
      unitRef="Unit_pure">0.1253</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000010960MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15834"
      unitRef="Unit_pure">0.0071</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_C000010960MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15835"
      unitRef="Unit_pure">0.02</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      id="ixv-15836">Bloomberg US Aggregate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15837"
      unitRef="Unit_pure">0.1055</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15838"
      unitRef="Unit_pure">-0.0023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2014To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15839"
      unitRef="Unit_pure">0.0149</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1056">Keep in mind that the  Fund's  past performance is not a good predictor of how the  Fund  will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1064">Visit delawarefunds.com/performance&lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15840">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1068"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; statistics &lt;/div&gt;(as of October 31, 2024)&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;3,011,179,121&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;900 &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total advisory fees paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;8,931,520&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;106&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis"
      decimals="0"
      id="ixv-15841"
      unitRef="Unit_USD">3011179121</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis"
      decimals="0"
      id="ixv-15842"
      unitRef="Unit_Holding">900</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      decimals="0"
      id="ixv-15843"
      unitRef="Unit_USD">8931520</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      decimals="INF"
      id="ixv-15844"
      unitRef="Unit_pure">1.06</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15845">&lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; holdings&lt;/div&gt; (as of October 31, 2024)&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;The table below shows the investment makeup of the Fund, with each category representing a percentage of the &lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;total &lt;/div&gt;net assets of the Fund.&lt;/div&gt;&lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'Arial'; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; border-bottom-color: rgb(0, 0, 0); text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;32.73&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Agency Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;27.60&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;US Treasury Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;15.23&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;8.03&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Loan Agreements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.94&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Asset-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.75&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Collateralized Mortgage Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;2.84&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Short-Term Investments&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.86&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Collateralized Debt Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.25&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.18&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_CorporateBondSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15846"
      unitRef="Unit_pure">0.3273</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_AgencyMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis_C000010960MemberoefClassAxis"
      decimals="INF"
      id="ixv-15847"
      unitRef="Unit_pure">0.276</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_USTreasuryObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15848"
      unitRef="Unit_pure">0.1523</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_NonAgencyCommercialMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15849"
      unitRef="Unit_pure">0.0803</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_LoanAgreementsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15850"
      unitRef="Unit_pure">0.0394</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_NonAgencyAssetBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15851"
      unitRef="Unit_pure">0.0375</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_NonAgencyCollateralizedMortgageObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15852"
      unitRef="Unit_pure">0.0284</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_ShortTermInvestmentMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15853"
      unitRef="Unit_pure">0.0186</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_CollateralizedDebtObligationMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15854"
      unitRef="Unit_pure">0.0125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000010960MemberoefClassAxis_SovereignBondsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15855"
      unitRef="Unit_pure">0.0118</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1152"> &lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Material Fund changes&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;Effective July 26, 2024, the Fund introduced a revised fee waiver for Institutional Class shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.&lt;/div&gt; </oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15856">Effective July 26, 2024, the Fund introduced a revised fee waiver for Institutional Class shares of 0.42% (excluding certain items, such as distribution and service (12b-1) fees).</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15857">2024-07-26</oef:MaterialChngDate>
    <oef:SummaryOfChngLegendTextBlock
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-1158">This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.</oef:SummaryOfChngLegendTextBlock>
    <oef:UpdProspectusWebAddress
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15858">delawarefunds.com/literature</oef:UpdProspectusWebAddress>
    <oef:UpdProspectusPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000010960MemberoefClassAxis"
      id="ixv-15859">800 523-1918</oef:UpdProspectusPhoneNumber>
    <oef:FundName
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15860">Delaware Diversified Income Fund</oef:FundName>
    <oef:ClassName
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15861">Class R6</oef:ClassName>
    <dei:TradingSymbol
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15862">DPZRX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15863">This annual shareholder report contains important information about Delaware Diversified Income Fund (Fund) for the period of November 1, 2023, to October 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15864">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1203">You can find additional information about the Fund at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature.&lt;/div&gt; You can also request this information by contacting us at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;800 523-1918&lt;/div&gt;, weekdays from &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;8:30am to 6:00pm ET.&lt;/div&gt;</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15865">delawarefunds.com/literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15866">800 523-1918</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15867">This report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1213"> &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;What were the&#160; Fund's costs for the last 12 months ? &lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; margin-bottom: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt;"&gt;&lt;div style="font-style:italic;display:inline;"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt; &lt;/div&gt;
&lt;table style="text-align:start; break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center;"&gt;Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: center; vertical-align: bottom; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: 20pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;Class R6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 6pt; text-align: center; vertical-align: bottom;"&gt;0.36&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      decimals="0"
      id="ixv-15868"
      unitRef="Unit_USD">38</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      decimals="INF"
      id="ixv-15869"
      unitRef="Unit_pure">0.0036</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1233">&lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 14pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Management's discussion of&lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;Fund performance&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0px; font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-bottom: 3pt;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Performance highli&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;gh&lt;/div&gt;ts&lt;/div&gt;&lt;/div&gt;  &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;Delaware Diversified Income Fund (Class R6) returned 12.63% (excluding sales charge) for the 12 months ended &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;October 31, 2024.&lt;/div&gt; During the same period, the Bloomberg US Aggregate Index, the Fund's broad-based securities market index, returned 10.55%.&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;text-indent: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top contributors to performance:&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Treasury yields fluctuated over the 12-month reporting period but ended lower as the US Federal Reserve (Fed) eventually cut interest rates. The Fund adjusted accordingly, and its positioning across the yield curve contributed to performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Allocations to the corporate bond and structured finance sectors contributed to the Fund&#x2019;s performance.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;  &lt;div style="font-family: Arial; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; margin-top: 15pt; margin-bottom: 3pt;text-indent: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Top detractors from performance:&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within the agency mortgage-backed securities (MBS) market, particularly the 30-year conventional lower coupons, detracted from performance. Overall mortgage rates depressed prepayments, adversely affecting agency MBS performance.&#160;&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Higher volatility over the reporting period adversely affected the performance of the Fund's agency MBS holdings.&lt;br/&gt;&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 0; margin-left: 26pt;text-indent: 0px;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;Selection within investment grade public corporates, especially allocations within the cable and satellite industry group, detracted from performance.&lt;br/&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1281">
&lt;img alt="Fund Performance - Growth of 10K" src="g819201chartimages_9125896.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1284">
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 1pt; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-indent: 0; width: 60%; line-height: 12pt; text-align: left;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;Average annual total returns &lt;/div&gt;(&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;as of &lt;/div&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;October 31, 2024&lt;/div&gt;)&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;1 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;5 year&lt;/div&gt;&lt;/td&gt;
&lt;td colspan="2" style="break-inside: avoid-page; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; text-align: center; line-height: 12pt;"&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;Since inception&lt;/div&gt;&lt;div style="font-weight:bold;display:inline;width:100%;"&gt;&lt;br/&gt;(5/2/16)&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class R6) &#x2013; including sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;12.63&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.80&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;2.21&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Delaware Diversified Income Fund (Class R6) &#x2013; excluding sales charge&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;12.63&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;0.80&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;2.21&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 1pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; text-align: left; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-right: 0; padding-bottom: 3pt; padding-left: 0; font-family: 'Arial'; text-indent: 0; width: 75%;"&gt;Bloomberg US Aggregate Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;10.55&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding: 6pt 0px 3pt; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: Arial; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap;"&gt;-0.23&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; text-align: right; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; padding-left: 0;"&gt;1.22&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: middle; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 3pt; text-align: left; width: 18pt;"&gt;&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
    <oef:PerfInceptionDate
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15870">2016-05-02</oef:PerfInceptionDate>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15871">Delaware Diversified Income Fund (Class R6) &#x2013; including sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      decimals="INF"
      id="ixv-15872"
      unitRef="Unit_pure">0.1263</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000171464MemberoefClassAxis"
      decimals="INF"
      id="ixv-15873"
      unitRef="Unit_pure">0.008</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P05_02_2016To10_31_2024_C000171464MemberoefClassAxis"
      decimals="INF"
      id="ixv-15874"
      unitRef="Unit_pure">0.0221</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      id="ixv-15875">Delaware Diversified Income Fund (Class R6) &#x2013; excluding sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15876"
      unitRef="Unit_pure">0.1263</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_C000171464MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15877"
      unitRef="Unit_pure">0.008</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P05_02_2016To10_31_2024_C000171464MemberoefClassAxis_WithoutSalesLoadMemberoefSalesLoadAxis"
      decimals="INF"
      id="ixv-15878"
      unitRef="Unit_pure">0.0221</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      id="ixv-15879">Bloomberg US Aggregate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2023To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15880"
      unitRef="Unit_pure">0.1055</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P11_01_2019To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15881"
      unitRef="Unit_pure">-0.0023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="P05_02_2016To10_31_2024_BloombergUSAggregateIndexMemberoefBroadBasedIndexAxis"
      decimals="INF"
      id="ixv-15882"
      unitRef="Unit_pure">0.0122</oef:AvgAnnlRtrPct>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1334">Keep in mind that the  Fund's  past performance is not a good predictor of how the  Fund  will perform in the future.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1342">Visit delawarefunds.com/performance&lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;&#160;&lt;/div&gt;for the most recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15883">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1345"> &lt;div style="margin-bottom: 5.5pt;"&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; statistics &lt;/div&gt;(as of October 31, 2024)&lt;/div&gt; &lt;/div&gt;


&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;3,011,179,121&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;900 &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Total advisory fees paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;&lt;div style="float: none; letter-spacing: 0px; top: 0px;display:inline;"&gt;$&lt;/div&gt;8,931,520&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: 20pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; padding-left: 0; padding-right: 0; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt; text-align: left; font-family: 'Arial'; font-weight: normal; width: 75%;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: middle; white-space: nowrap; padding-left: 0; padding-right: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 6pt; padding-bottom: 6pt;"&gt;106&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis"
      decimals="0"
      id="ixv-15884"
      unitRef="Unit_USD">3011179121</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis"
      decimals="0"
      id="ixv-15885"
      unitRef="Unit_Holding">900</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      decimals="0"
      id="ixv-15886"
      unitRef="Unit_USD">8931520</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      decimals="INF"
      id="ixv-15887"
      unitRef="Unit_pure">1.06</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1371"> &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;&lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt;Fund&lt;/div&gt; &lt;div style="font-size: 12pt;font-weight:bold;display:inline;"&gt; holdings&lt;/div&gt; (as of October 31, 2024)&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; margin-bottom: 10pt; line-height: 110%;"&gt;The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund.&lt;/div&gt; &lt;div style="border-bottom-width: 1pt; border-bottom-style: solid; font-family: 'Arial'; color: rgb(0, 0, 0); text-transform: none; letter-spacing: normal; font-size: 10pt; border-bottom-color: rgb(0, 0, 0); text-align: center; padding-bottom: 5pt; margin-bottom: 5pt; margin-top: 5pt;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="text-align:start; width: 100%; border-collapse: collapse; break-inside: avoid-page;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;32.73&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Agency Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;27.60&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;US Treasury Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;15.23&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;8.03&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Loan Agreements&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.94&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Asset-Backed Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;3.75&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Non-Agency Collateralized Mortgage Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;2.84&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Short-Term Investments&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.86&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; border-bottom-color: initial; height: auto;"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Collateralized Debt Obligations&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.25&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 6pt; vertical-align: bottom; text-indent: -6pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; padding-top: 1pt; padding-right: 3pt; padding-bottom: 1pt; padding-left: 3pt; vertical-align: bottom;"&gt;1.18&lt;div style="letter-spacing: 0px; top: 0px;display:inline;"&gt;%&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_CorporateBondSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15888"
      unitRef="Unit_pure">0.3273</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_AgencyMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis_C000171464MemberoefClassAxis"
      decimals="INF"
      id="ixv-15889"
      unitRef="Unit_pure">0.276</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_USTreasuryObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15890"
      unitRef="Unit_pure">0.1523</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_NonAgencyCommercialMortgageBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15891"
      unitRef="Unit_pure">0.0803</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_LoanAgreementsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15892"
      unitRef="Unit_pure">0.0394</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_NonAgencyAssetBackedSecuritiesMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15893"
      unitRef="Unit_pure">0.0375</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_NonAgencyCollateralizedMortgageObligationsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15894"
      unitRef="Unit_pure">0.0284</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_ShortTermInvestmentMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15895"
      unitRef="Unit_pure">0.0186</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_CollateralizedDebtObligationMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15896"
      unitRef="Unit_pure">0.0125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="PAsOn10_31_2024_C000171464MemberoefClassAxis_SovereignBondsMemberusgaapInvestmentTypeAxis"
      decimals="INF"
      id="ixv-15897"
      unitRef="Unit_pure">0.0118</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1428"> &lt;div style="font-family: Arial; color: rgb(0, 0, 0); font-size: 12pt; margin-bottom: 10pt; margin-top: 0px;"&gt;&lt;div style="font-weight:bold;display:inline;"&gt;Material Fund changes&lt;/div&gt;&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;Effective July 26, 2024, the Fund introduced a revised fee waiver for Class R6 shares of 0.33% (excluding certain items, such as distribution and service (12b-1) fees).&lt;/div&gt; &lt;div style="margin-top: 0; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 110%; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.&lt;/div&gt; </oef:MaterialFundChngTextBlock>
    <oef:MaterialFundChngExpensesTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15898">Effective July 26, 2024, the Fund introduced a revised fee waiver for Class R6 shares of 0.33% (excluding certain items, such as distribution and service (12b-1) fees).</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15899">2024-07-26</oef:MaterialChngDate>
    <oef:SummaryOfChngLegendTextBlock
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-1434">This is a summary of certain changes to the Fund since the beginning of the reporting period. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025, at &lt;div style="white-space: nowrap; font-family: inherit; font-size: inherit; line-height: inherit; margin: inherit; padding: inherit; letter-spacing: 0px; top: 0px;display:inline;"&gt;delawarefunds.com/literature&lt;/div&gt; or upon request at 800 523-1918, weekdays from 8:30am to 6:00pm ET.</oef:SummaryOfChngLegendTextBlock>
    <oef:UpdProspectusWebAddress
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15900">delawarefunds.com/literature</oef:UpdProspectusWebAddress>
    <oef:UpdProspectusPhoneNumber
      contextRef="P11_01_2023To10_31_2024_C000171464MemberoefClassAxis"
      id="ixv-15901">800 523-1918</oef:UpdProspectusPhoneNumber>
</xbrl>
