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      id="t_1_c9031335_c30e_4ad6_b771_d7bcec48941d">This annual shareholder report contains important information about iShares Municipal Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      id="t_3_4ca59a0b_4552_43db_b025_7b452d579417">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
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      id="t_13_f8674556_bd94_e4ec_edbc_8602958a476e">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt; &lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
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&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: left;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs of a $10,000&lt;br/&gt; investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs paid as a percentage of a&lt;br/&gt; $10,000 investment&lt;/td&gt; &lt;/tr&gt;
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&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; font-size: 8pt; line-height: 10pt; text-align: left;"&gt;Institutional Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;24&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;0.24&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
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      id="t_14_1c204a9b_b2f8_a713_71ed_da13de1fb615">&lt;div style="margin-bottom:0px;"&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;margin-top:0px;"&gt; &lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt; &lt;/div&gt; &lt;ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 3.5pt; margin-right: 0; margin-bottom: 3.5pt; margin-left: 0; break-inside: avoid;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Institutional Shares returned 3.70%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Municipal Securities Index returned 3.92%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;Municipal bonds produced a solid total return in 2025, with modest price gains augmenting the contribution from income. The asset class benefited from the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts, which helped fuel a decline in prevailing yields. (Prices and yields move in opposite directions.) The asset class further benefited from positive supply-and-demand trends, driven in part by its attractive after-tax yields relative to U.S. Treasuries. In addition, the One Big Beautiful Bill, passed in July, removed a source of uncertainty for the market by maintaining the municipal tax exemption. Not least, municipals were well supported by continued strength in issuers&#x2019; credit fundamentals.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;At a time of positive market performance, no segment of the Fund was a meaningful detractor.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt; &lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt; &lt;/div&gt; &lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654361.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left:10pt;margin-bottom:7.2pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;text-indent:-10pt;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt;</oef:LineGraphTableTextBlock>
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&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;Average annual total returns&lt;/td&gt;
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&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; padding-right: 0; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Institutional Shares&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.70&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;0.74&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;2.15&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&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; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;ICE BofA US Municipal Securities Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.92&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;0.81&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;2.36&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000195948Member"
      id="t_25_a8df3868_3d84_4f0c_08db_6ef50aa5737e">Institutional Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000195948Member"
      decimals="4"
      id="h_3_6df375f5_c1a1_4d57_9ba9_daa6c76ad80e"
      unitRef="pure">0.0370</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000195948Member"
      decimals="4"
      id="h_4_69ab81cb_fdba_442d_b453_372ed527e3f9"
      unitRef="pure">0.0074</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000195948Member"
      decimals="4"
      id="h_5_d122807f_94ea_41e5_8ce1_ea28547f8a43"
      unitRef="pure">0.0215</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      id="t_24_cc3e92f2_5935_7acc_3cb5_0d237eba0ac0">ICE BofA US Municipal Securities Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_6_e96c49eb_1fa0_4596_966c_203dfeab1a43"
      unitRef="pure">0.0392</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_7_9aa9b76e_89d0_4a90_aee1_18c6c58dcf35"
      unitRef="pure">0.0081</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_8_32adefe9_726c_42bd_aea1_ffb1bacad64a"
      unitRef="pure">0.0236</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000195948Member"
      id="t_17_81f0f6c6_96f2_5613_1daf_20cd23cc1fef">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-left: 0; padding-right: 0; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-bottom: 1.5pt; margin-bottom: 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-left: 6pt; padding-right: 6pt; font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;213,022,580&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;364&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;97,791&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; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 1.6pt; text-indent: -6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 1.6pt;"&gt;38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20251231_C000195948Member"
      decimals="INF"
      id="h_9_1fe6bb57_a38e_4af6_9ea7_407d1cdfc0f9"
      unitRef="USD">213022580</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20251231_C000195948Member"
      decimals="INF"
      id="h_10_39a1115d_c62a_4a15_a46b_8453fe7f72df"
      unitRef="Holding">364</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000195948Member"
      decimals="INF"
      id="h_11_461737d5_ce47_44ca_baec_882c25d9a980"
      unitRef="USD">97791</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000195948Member"
      decimals="4"
      id="h_12_9a2c8fbe_5dcf_4e93_8ea7_3d48df116522"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="FY2025_C000195948Member"
      id="t_18_d8ac349e_9ac0_e5f1_48fd_3828708e2ec2">2018-11-19</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000195948Member"
      id="t_19_2800d6da_2d18_18bb_d2be_ff415a52dd8e">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2025_C000195948Member"
      id="t_20_0d8138a4_6eff_573c_e776_d76ef361d6ce">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000195948Member"
      id="t_21_d7b28ea6_72e1_262e_3e91_35e3e8e541fc">Visit &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000195948Member"
      id="t_9_704d2c30_97ed_454f_a843_ba667c1f79fe">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';text-align:justify;font-size:9pt;line-height:11.4pt;color:rgb(0, 0, 0);margin-bottom:0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Sector&lt;/strong&gt;&lt;strong&gt; allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt; width: auto;"&gt;&lt;em&gt;Sector&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 6pt;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="padding-left: 6pt; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Transportation&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;24.3&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;State&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;18.4&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;County/City/Special District/School District&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;17.7&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Utilities&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;10.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Corporate&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;8.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Education&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;7.7&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Health&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;6.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;Housing&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.5&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Credit quality allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Credit Rating&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(c)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;AAA/Aaa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;13.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;AA/Aa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;55.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;A&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;25.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;BBB/Baa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;N/R&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;0.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 6pt; padding-bottom: 0; padding-left: 0; width: initial; vertical-align: top; text-indent: 0;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 6pt; padding-bottom: 0; padding-left: 0; width: initial; vertical-align: top; text-indent: 0;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(c)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      id="h_13_a6641865_d17d_4106_bb8b_0a442fd7f197"
      unitRef="pure">0.243</oef:PctOfTotalInv>
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      id="h_14_7d9dc799_8102_4f56_9482_25d7c0e134f9"
      unitRef="pure">0.184</oef:PctOfTotalInv>
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      id="h_15_f91aaf2d_4e1f_4adf_ba74_36a9c6351218"
      unitRef="pure">0.177</oef:PctOfTotalInv>
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      id="h_16_58784ce0_655d_4ae6_95b6_1d7db868889a"
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      id="h_17_65aedae4_3fdf_47d2_9594_d2113cae6c86"
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      id="h_18_c36a048d_4a5f_4fd6_a135_734ee1d9afe3"
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      contextRef="TI20251231_C000195948Member_HealthMember"
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      id="h_19_3193f772_0026_4362_8a46_29c539b88c6d"
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      contextRef="TI20251231_C000195948Member_HousingMember"
      decimals="4"
      id="h_20_ca66d123_1bf6_4ec1_8b1d_2e4280ebc9b6"
      unitRef="pure">0.055</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195948Member_StandardPoorsAAARatingMember"
      decimals="4"
      id="h_21_627b59d4_00b9_4e6d_b287_c7111cf6a1d3"
      unitRef="pure">0.133</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000195948Member_StandardPoorsAARatingMember"
      decimals="4"
      id="h_22_7c3c579d_fe0e_48ab_a9f6_176b66310485"
      unitRef="pure">0.554</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000195948Member_StandardPoorsARatingMember"
      decimals="4"
      id="h_23_83974a10_f3fc_4dcd_8a71_f614ede0b5d7"
      unitRef="pure">0.254</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000195948Member_StandardPoorsBBBRatingMember"
      decimals="4"
      id="h_24_c4b49aaf_4137_4e6a_b107_f409b139a48c"
      unitRef="pure">0.057</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195948Member_NRMember"
      decimals="4"
      id="h_25_012f2479_1554_4725_a55c_c888ab1561c7"
      unitRef="pure">0.002</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="FY2025_C000195948Member"
      id="t_23_7ae6ac18_a4f9_d9f5_a90d_ab7a910346fe">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
    <oef:CreditRatingsSelectionTextBlock
      contextRef="FY2025_C000195948Member"
      id="t_22_4c0dee5b_186f_0856_a69f_9e64161f3f5c">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2025_C000195947Member"
      id="t_19_85501176_5d9e_77e6_86d6_cbe060d524fd">iShares Municipal Bond Index Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2025_C000195947Member"
      id="t_20_df3377e4_589f_559a_1f5b_fa3f86e1d4b8">Investor A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000195947Member"
      id="t_21_3c21e66a_5cd7_af78_1a7e_e9e38f7566c4">BIDAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_10_6c123fcf_ca36_4325_b834_f9dbd549aec5">This annual shareholder report contains important information about iShares Municipal Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000195947Member"
      id="t_11_9e0cee9e_5a8a_4f0f_a584_0876e68c6304">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_12_0bfec3d3_bad1_4113_9ab7_7eb080cba4af">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000195947Member"
      id="t_13_e8300824_f328_4862_b42d_5881541f0c02">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000195947Member"
      id="t_14_72ed6408_7bb0_45f7_b599_e8f0d748cd63">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_22_176d7360_daf8_c1b4_2ec9_baa3172a3525">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt; &lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside:avoid;margin-top:2pt;table-layout:auto;width:100%;border-collapse:collapse"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: left;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs of a $10,000&lt;br/&gt; investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs paid as a percentage of a&lt;br/&gt; $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; font-size: 8pt; line-height: 10pt; text-align: left;"&gt;Investor A Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;0.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000195947Member"
      decimals="INF"
      id="h_26_38514d40_bfc7_478b_ac79_6b9604e84a97"
      unitRef="USD">51</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2025_C000195947Member"
      decimals="4"
      id="h_27_66ace15b_6371_4ecb_a506_48cc76583bbe"
      unitRef="pure">0.0050</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_23_198b525f_bd80_6271_3396_732765088203">&lt;div style="margin-bottom:0px;"&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;margin-top:0px;"&gt; &lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt; &lt;/div&gt; &lt;ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 3.5pt; margin-right: 0; margin-bottom: 3.5pt; margin-left: 0; break-inside: avoid;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Investor A Shares returned 3.44%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Municipal Securities Index returned 3.92%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;Municipal bonds produced a solid total return in 2025, with modest price gains augmenting the contribution from income. The asset class benefited from the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts, which helped fuel a decline in prevailing yields. (Prices and yields move in opposite directions.) The asset class further benefited from positive supply-and-demand trends, driven in part by its attractive after-tax yields relative to U.S. Treasuries. In addition, the One Big Beautiful Bill, passed in July, removed a source of uncertainty for the market by maintaining the municipal tax exemption. Not least, municipals were well supported by continued strength in issuers&#x2019; credit fundamentals.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;At a time of positive market performance, no segment of the Fund was a meaningful detractor.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt; &lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt; &lt;/div&gt; &lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_24_2a35c61a_7ccc_e6d1_f3c8_0f3a0f2a5518">&lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-bottom:5pt;"&gt; &lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;Fund performance &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Cumulative performance: January 1, 2016 through December 31, 2025 &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:5pt;margin-bottom:5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654310.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left:10pt;margin-bottom:7.2pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;text-indent:-10pt;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_25_badf3f38_1941_9255_fbed_e811327daad0">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;Average annual total returns&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; padding-right: 0; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Investor A Shares&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.44&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;0.49&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;1.96&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&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; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;ICE BofA US Municipal Securities Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.92&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;0.81&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;2.36&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000195947Member"
      id="t_31_a3598c96_3bfb_8884_1d00_0b7513733e0a">Investor A Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000195947Member"
      decimals="4"
      id="h_28_0e535b63_ad6b_4388_95a7_ae8b2a03bbd8"
      unitRef="pure">0.0344</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000195947Member"
      decimals="4"
      id="h_29_7cc8d0f7_fa83_49bc_b542_07b109823da5"
      unitRef="pure">0.0049</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000195947Member"
      decimals="4"
      id="h_30_08fec4e2_9c50_4c4c_a184_12cccc77d229"
      unitRef="pure">0.0196</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      id="t_30_483f9560_22c6_c3be_5d9b_16c52a826818">ICE BofA US Municipal Securities Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_31_d35c9af2_90c7_4cc4_a400_57f81617ed6b"
      unitRef="pure">0.0392</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_32_eb7c44e5_0232_4255_a4fe_665aeb6fb8ab"
      unitRef="pure">0.0081</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_33_068f5ba2_f924_4d3a_aae6_3b6cb1e24700"
      unitRef="pure">0.0236</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_26_fff81e3f_339e_f6ee_f07c_4a8ff33a2b1f">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-left: 0; padding-right: 0; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-bottom: 1.5pt; margin-bottom: 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-left: 6pt; padding-right: 6pt; font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;213,022,580&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;364&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;97,791&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; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 1.6pt; text-indent: -6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 1.6pt;"&gt;38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20251231_C000195947Member"
      decimals="INF"
      id="h_34_369c362f_d34d_4ab4_8bae_37cd50c9b68c"
      unitRef="USD">213022580</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20251231_C000195947Member"
      decimals="INF"
      id="h_35_5489e73e_639a_450e_afe1_94044eb67781"
      unitRef="Holding">364</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000195947Member"
      decimals="INF"
      id="h_36_412d868b_2765_4af9_ae8b_c3e9c8a93831"
      unitRef="USD">97791</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000195947Member"
      decimals="4"
      id="h_37_ff16f78d_8f2b_4839_8fc7_f7923d82472e"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000195947Member"
      id="t_27_cc6ccbf4_036a_bffc_7d6b_ef30d803dd9f">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_28_e2ef4774_8cf4_1034_6c90_62f8b36e2443">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_29_e98201da_b09d_db67_83ae_6b8d09d15b2b">Visit &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_18_d1aeb9df_7ccb_4a38_8524_e56917450e1b">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';text-align:justify;font-size:9pt;line-height:11.4pt;color:rgb(0, 0, 0);margin-bottom:0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Sector&lt;/strong&gt;&lt;strong&gt; allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt; width: auto;"&gt;&lt;em&gt;Sector&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 6pt;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="padding-left: 6pt; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Transportation&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;24.3&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;State&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;18.4&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;County/City/Special District/School District&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;17.7&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Utilities&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;10.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Corporate&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;8.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Education&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;7.7&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Health&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;6.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;Housing&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.5&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Credit quality allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Credit Rating&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(c)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;AAA/Aaa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;13.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;AA/Aa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;55.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;A&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;25.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;BBB/Baa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;N/R&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;0.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 6pt; padding-bottom: 0; padding-left: 0; width: initial; vertical-align: top; text-indent: 0;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 6pt; padding-bottom: 0; padding-left: 0; width: initial; vertical-align: top; text-indent: 0;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(c)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
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      unitRef="pure">0.243</oef:PctOfTotalInv>
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      id="h_39_0344c0aa_26e8_4b57_b76b_b0c0dd610c7c"
      unitRef="pure">0.184</oef:PctOfTotalInv>
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      id="h_41_40cacbdd_aabd_41f1_a84d_4b1f3e6c86ce"
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      id="h_42_2640d9ec_e14a_462e_a6ff_94b2049212ff"
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      id="h_43_d6dee1ba_990b_4fe8_99a5_cee567a1623a"
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      id="h_44_ca926c1e_6a4a_4a74_baf1_7045f863aa0c"
      unitRef="pure">0.068</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195947Member_HousingMember"
      decimals="4"
      id="h_45_21a8d45e_21d4_477a_8b29_0e2ca37c8ffd"
      unitRef="pure">0.055</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195947Member_StandardPoorsAAARatingMember"
      decimals="4"
      id="h_46_f8f622b2_b79d_4019_9d1f_7411d16d260c"
      unitRef="pure">0.133</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195947Member_StandardPoorsAARatingMember"
      decimals="4"
      id="h_47_25ebfaff_44a4_4145_99ec_be2abd0a2e97"
      unitRef="pure">0.554</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000195947Member_StandardPoorsARatingMember"
      decimals="4"
      id="h_48_ea0207ef_c413_4419_b39e_d080b9c30f26"
      unitRef="pure">0.254</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195947Member_StandardPoorsBBBRatingMember"
      decimals="4"
      id="h_49_e7aa908c_8dd3_406d_bfe5_9dd5db0c641e"
      unitRef="pure">0.057</oef:PctOfTotalInv>
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      contextRef="TI20251231_C000195947Member_NRMember"
      decimals="4"
      id="h_50_e73d2ebc_8b27_45a6_bb30_e83aa2575527"
      unitRef="pure">0.002</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_33_5608b7ea_ffdf_8c4b_f0e5_d46ddeb1720a">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
    <oef:CreditRatingsSelectionTextBlock
      contextRef="FY2025_C000195947Member"
      id="t_32_30341814_7cc6_1a84_7d0d_e6dc39d6cc9e">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2025_C000201952Member"
      id="t_28_3b7e06e5_ab60_44d9_666b_5c4b9b1e86e1">iShares Municipal Bond Index Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2025_C000201952Member"
      id="t_29_4c4c9aa5_a081_43c2_24af_71abe5061562">Investor P Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000201952Member"
      id="t_30_0533b9a1_d690_bc3d_4e67_85e8b6e2a4e2">BIDPX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_19_63abc3ba_a85a_4c38_a1d3_5d191024bf6c">This annual shareholder report contains important information about iShares Municipal Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000201952Member"
      id="t_20_adc98b51_0a67_4aff_84ea_3659036093d0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_21_6c79a9fa_bc2f_48ab_b19a_a914783a0854">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000201952Member"
      id="t_22_599c7d42_a519_4359_99de_58215d0eed8b">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000201952Member"
      id="t_23_faf8ba86_18fa_4991_8960_94864ace4b7e">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_31_f5325883_889c_ffd7_3cca_1d08005fa1d6">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt; &lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside:avoid;margin-top:2pt;table-layout:auto;width:100%;border-collapse:collapse"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: left;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs of a $10,000&lt;br/&gt; investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs paid as a percentage of a&lt;br/&gt; $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; font-size: 8pt; line-height: 10pt; text-align: left;"&gt;Investor P Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;50&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;0.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000201952Member"
      decimals="INF"
      id="h_51_36583305_2f15_4493_bff6_49f2bb37f4bd"
      unitRef="USD">50</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2025_C000201952Member"
      decimals="4"
      id="h_52_08228819_4225_42ec_aaf9_8c9c6bc88d7e"
      unitRef="pure">0.0049</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_32_5fce926d_2fde_1228_8c73_11636584c104">&lt;div style="margin-bottom:0px;"&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;margin-top:0px;"&gt; &lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt; &lt;/div&gt; &lt;ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 3.5pt; margin-right: 0; margin-bottom: 3.5pt; margin-left: 0; break-inside: avoid;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Investor P Shares returned 3.44%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Municipal Securities Index returned 3.92%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;Municipal bonds produced a solid total return in 2025, with modest price gains augmenting the contribution from income. The asset class benefited from the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts, which helped fuel a decline in prevailing yields. (Prices and yields move in opposite directions.) The asset class further benefited from positive supply-and-demand trends, driven in part by its attractive after-tax yields relative to U.S. Treasuries. In addition, the One Big Beautiful Bill, passed in July, removed a source of uncertainty for the market by maintaining the municipal tax exemption. Not least, municipals were well supported by continued strength in issuers&#x2019; credit fundamentals.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;At a time of positive market performance, no segment of the Fund was a meaningful detractor.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt; &lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt; &lt;/div&gt; &lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_33_a5fd03f3_6d04_a6c5_fabf_eacf38558fae">&lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-bottom:5pt;"&gt; &lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;Fund performance &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Cumulative performance: January 1, 2016 through December 31, 2025 &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:5pt;margin-bottom:5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654297.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left:10pt;margin-bottom:7.2pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;text-indent:-10pt;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_37_131193e5_da9c_8c22_0458_ebccdabc6367">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;Average annual total returns&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; padding-right: 0; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Investor P Shares&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.44&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;0.50&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;1.97&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Investor P Shares (with sales charge)&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;(0.70&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;(0.32&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;1.55&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&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; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;ICE BofA US Municipal Securities Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.92&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;0.81&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;2.36&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000201952Member_WithoutSalesLoadMember"
      id="t_34_ebd14c3f_195a_2c93_7e5d_63ee61fedf51">Investor P Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000201952Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_53_90c3c48b_4388_4602_9e95_5a84907ccf95"
      unitRef="pure">0.0344</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000201952Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_54_3dd0d5c1_fc4c_4b43_a602_0021f7da3c78"
      unitRef="pure">0.0050</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000201952Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_55_92d0544c_b162_4327_848e_7babda8dd7df"
      unitRef="pure">0.0197</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000201952Member"
      id="t_35_04637e6d_b98d_6de5_1c61_ab08216847c6">Investor P Shares (with sales charge)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000201952Member"
      decimals="4"
      id="h_56_49eea5c6_596a_455c_bac5_144a0c41a301"
      unitRef="pure">-0.0070</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000201952Member"
      decimals="4"
      id="h_57_1a9e24ca_d5b5_4c5b_bac4_d57e10d45bfc"
      unitRef="pure">-0.0032</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000201952Member"
      decimals="4"
      id="h_58_927e79b7_b14c_45bc_846f_c67b06376ffa"
      unitRef="pure">0.0155</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      id="t_36_a2f725b3_4210_8090_930b_46103ced31f3">ICE BofA US Municipal Securities Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_59_cec51cbe_546b_4c9d_a26e_4b36d8e9e392"
      unitRef="pure">0.0392</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_60_fea60d46_aefd_456d_a2d1_dcc0814b7e5b"
      unitRef="pure">0.0081</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_61_1e5393ae_fabd_460b_813b_4e952b246366"
      unitRef="pure">0.0236</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_38_b02889b1_1cfd_0835_df51_f51141af872f">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-left: 0; padding-right: 0; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-bottom: 1.5pt; margin-bottom: 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-left: 6pt; padding-right: 6pt; font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;213,022,580&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;364&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;97,791&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; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 1.6pt; text-indent: -6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 1.6pt;"&gt;38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_62_77952c70_36cd_4bb1_a18b_6cdc3a4062d6"
      unitRef="USD">213022580</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20251231_C000201952Member"
      decimals="INF"
      id="h_63_1b6063f6_f8c0_4704_a7a0_b631fc7589aa"
      unitRef="Holding">364</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000201952Member"
      decimals="INF"
      id="h_64_97ed8879_d4e9_4334_a900_ac494f62f829"
      unitRef="USD">97791</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000201952Member"
      decimals="4"
      id="h_65_507339d2_d296_4f63_bf83_3f966d638e63"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000201952Member"
      id="t_39_c18625df_3fd7_5ad0_e8e6_d5759eceac1c">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_40_04ff08c9_0fd4_5526_5a51_3a8341dcfebb">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_41_c5e4db9e_3d5f_9147_7522_0b1a5e973333">Visit &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_42_c37cbd08_5769_81e3_0bd8_dabf150c7722">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';text-align:justify;font-size:9pt;line-height:11.4pt;color:rgb(0, 0, 0);margin-bottom:0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Sector&lt;/strong&gt;&lt;strong&gt; allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt; width: auto;"&gt;&lt;em&gt;Sector&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 6pt;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="padding-left: 6pt; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Transportation&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;24.3&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;State&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;18.4&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;County/City/Special District/School District&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;17.7&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Utilities&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;10.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Corporate&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;8.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Education&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;7.7&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Health&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;6.8&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;Housing&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.5&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Credit quality allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Credit Rating&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(c)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;AAA/Aaa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;13.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;AA/Aa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;55.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;A&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;25.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;BBB/Baa&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;N/R&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;0.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 6pt; padding-bottom: 0; padding-left: 0; width: initial; vertical-align: top; text-indent: 0;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(b)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 6pt; padding-bottom: 0; padding-left: 0; width: initial; vertical-align: top; text-indent: 0;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(c)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      id="h_70_3c3ce2e3_e19d_4215_bbb3_6ba9972e663a"
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      id="h_75_d295fa34_cbbc_4dab_b511_483253c024e1"
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      contextRef="TI20251231_C000201952Member_StandardPoorsARatingMember"
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      id="h_76_3ba2ceb9_67f8_49dc_8325_ce241f58c37a"
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      id="h_77_dee37a96_672c_453e_a260_3b42c6f3331a"
      unitRef="pure">0.057</oef:PctOfTotalInv>
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      decimals="4"
      id="h_78_a5478389_24e0_416e_b306_6f605980ab3e"
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    <oef:CreditQualityExplanationTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_44_1b3a24d7_8c70_6f96_f65e_3174bc35e454">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
    <oef:CreditRatingsSelectionTextBlock
      contextRef="FY2025_C000201952Member"
      id="t_43_d6b3eeed_dfc9_470e_2e7c_e809feb3a15f">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2025_C000195949Member"
      id="t_37_41b93f3b_3573_82e9_1f9a_4b0860c25c21">iShares Municipal Bond Index Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2025_C000195949Member"
      id="t_38_eb89711d_e029_0ac4_db30_73b71680e236">Class K Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000195949Member"
      id="t_39_63c9502a_c7ee_599d_f187_1c9ed4bc0442">BIDKX</dei:TradingSymbol>
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      contextRef="FY2025_C000195949Member"
      id="t_28_c0aa5a02_29ac_4ab1_a65e_5bf332c84e90">This annual shareholder report contains important information about iShares Municipal Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000195949Member"
      id="t_29_3d925af4_3c10_42a9_83e4_b3389d384bf2">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_30_50423818_3b49_41bf_8710_902db72ae32c">You can find additional information about the Fund at &lt;span style="color: rgb(0, 0, 0); font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000195949Member"
      id="t_31_411af4d5_554d_48b1_a2d5_879fb691a13a">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000195949Member"
      id="t_32_791a7dd8_ab43_4b27_8745_3b74816ee47c">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_40_d223083b_495b_8557_8064_d34dd2318638"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: rgb(0, 0, 0); margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt;&lt;/div&gt;  &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: left; padding: 2pt 0 2pt 0;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs of a $10,000&lt;br/&gt;investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; font-size: 8pt; line-height: 10pt; text-align: left; padding: 4pt 0 2pt 0;"&gt;Class K Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-size: 8pt; line-height: 10pt; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-size: 8pt; line-height: 10pt; padding: 4pt 0 2pt 0;"&gt;0.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_79_72c07dd7_610d_40b5_82ad_656928a3f1cf"
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    <oef:ExpenseRatioPct
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      id="h_80_040c0322_441f_466e_8624_f22992ffd2f1"
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    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_41_21e0581b_b271_8adc_a672_a7d1c23c0b63"> &lt;div style="margin-bottom: 0px;"&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: rgb(0, 0, 0); margin-bottom: -0.18pt; margin-top: 0px;"&gt;&lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt;&lt;/div&gt; &lt;/div&gt; &lt;ul style="break-inside: avoid; padding: 0; margin: 3.5pt 0 3.5pt 0;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Class K Shares returned 3.74%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Municipal Securities Index returned 3.92%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: rgb(0, 0, 0); margin-bottom: 5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: rgb(0, 0, 0); margin-bottom: 3.5pt;"&gt;Municipal bonds produced a solid total return in 2025, with modest price gains augmenting the contribution from income. The asset class benefited from the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts, which helped fuel a decline in prevailing yields. (Prices and yields move in opposite directions.) The asset class further benefited from positive supply-and-demand trends, driven in part by its attractive after-tax yields relative to U.S. Treasuries. In addition, the One Big Beautiful Bill, passed in July, removed a source of uncertainty for the market by maintaining the municipal tax exemption. Not least, municipals were well supported by continued strength in issuers&#x2019; credit fundamentals.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: rgb(0, 0, 0); margin-bottom: 5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: rgb(0, 0, 0); margin-bottom: 3.5pt;"&gt;At a time of positive market performance, no segment of the Fund was a meaningful detractor.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: rgb(0, 0, 0); margin-bottom: 3.5pt;"&gt;&lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_42_89212760_b861_9979_e86a_55eb8c1d2b65"> &lt;div style="break-inside: avoid;"&gt; &lt;div style="margin-bottom: 5pt;"&gt; &lt;div style="break-inside: avoid;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: rgb(0, 0, 0); margin-bottom: -0.18pt;"&gt;Fund performance&lt;/div&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0);"&gt;Cumulative performance: January 1, 2016 through December 31, 2025&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0);"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 5pt; margin-bottom: 5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654374.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left: 10pt; margin-bottom: 7.2pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: -10pt; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; </oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_45_a200b07c_83ce_4535_0c30_678b460da238">
&lt;table style="break-inside: avoid; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; background-color: rgb(255, 206, 0); border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; margin-bottom: 0; padding: 2pt 0 1.5pt 0;"&gt;Average annual total returns&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after: avoid; border-bottom-style: none; border-bottom-width: initial; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Class K Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.74&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.79&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&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; vertical-align: bottom; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;ICE BofA US Municipal Securities Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;3.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;0.81&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.36&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000195949Member"
      id="t_43_4d44d25f_6f1e_0f26_fe0a_de2a62f02132">Class K Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000195949Member"
      decimals="4"
      id="h_81_72860b2c_abbf_42d2_93ff_50fb23874cb4"
      unitRef="pure">0.0374</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000195949Member"
      decimals="4"
      id="h_82_74709a37_4460_49ee_9f76_0e9fab456f16"
      unitRef="pure">0.0079</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000195949Member"
      decimals="4"
      id="h_83_5352d655_30aa_4a65_8eb7_07c16170da74"
      unitRef="pure">0.0218</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      id="t_44_46e2d8e9_5b65_2b42_9346_398f7fc272fb">ICE BofA US Municipal Securities Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_84_9c160803_0f5a_4a36_b8e5_32c79712f56f"
      unitRef="pure">0.0392</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_85_26ecfa9c_ae67_41ad_9035_3ba4f1cd19d1"
      unitRef="pure">0.0081</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_ICEBofAUSMunicipalSecuritiesIndexMember"
      decimals="4"
      id="h_86_1aece438_9608_4dd1_b5a1_040ad05423d8"
      unitRef="pure">0.0236</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_46_4f8c2565_0e08_06c1_dd2a_8e55ca5d40b0">
&lt;table style="break-inside: avoid; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; background-color: rgb(255, 206, 0); border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; margin-bottom: 0; padding: 2pt 0 1.5pt 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;213,022,580&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;364&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;97,791&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; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20251231_C000195949Member"
      decimals="INF"
      id="h_87_60ac9511_5420_4ad3_b282_6731272b29a7"
      unitRef="USD">213022580</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20251231_C000195949Member"
      decimals="INF"
      id="h_88_9f30d86d_f06c_40c3_ba5d_e7c9a0cae148"
      unitRef="Holding">364</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000195949Member"
      decimals="INF"
      id="h_89_9ae07a74_fc08_4f98_8ee4_db4c045be49e"
      unitRef="USD">97791</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000195949Member"
      decimals="4"
      id="h_90_6c263818_ce6e_4741_8236_167cdc64998e"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="FY2025_C000195949Member"
      id="t_51_5dae572c_f529_19d6_2cf5_90fd485bcca6">2018-11-19</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000195949Member"
      id="t_47_8d05604f_c82f_c0ad_489e_adb2e6392bb0">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_48_1dbe2d25_3e41_6b07_3f7c_2541a72ec63a">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_49_17ffba18_0abb_46c0_a38a_13eee56e66b9">Visit &lt;span style="color: rgb(0, 0, 0); font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_54_c2d8d0ca_2258_5a3a_e7e9_b3d57de8f8ec">&lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: rgb(0, 0, 0); margin-bottom: -0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: rgb(0, 0, 0); margin-bottom: 0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside: avoid; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; background-color: rgb(255, 206, 0); border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; margin-bottom: 0; padding: 2pt 0 1.5pt 0;"&gt;&lt;strong&gt;Sector&lt;/strong&gt;&lt;strong&gt; allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; text-indent: -6pt; width: auto; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Sector&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding: 1.6pt 0 0 6pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Transportation&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;24.3&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;State&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;18.4&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;County/City/Special District/School District&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;17.7&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Utilities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;10.8&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Corporate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;8.8&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Education&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.7&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Health&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.8&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&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; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Housing&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;5.5&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; background-color: rgb(255, 206, 0); border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; margin-bottom: 0; padding: 2pt 6pt 1.5pt 0;"&gt;&lt;strong&gt;Credit quality allocation&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after: avoid; border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Credit Rating&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(c)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding: 1.6pt 0 0 0;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AAA/Aaa&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;13.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AA/Aa&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;55.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;25.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;BBB/Baa&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&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; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: rgb(0, 0, 0);"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;N/R&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse: collapse; break-inside: avoid; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0); padding: 1.6pt 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); width: 100%; padding: 1.6pt 0 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); width: initial; vertical-align: top; text-indent: 0; padding: 0 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); width: 100%; padding: 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;Excludes short-term securities.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); width: initial; vertical-align: top; text-indent: 0; padding: 0 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(c)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: rgb(0, 0, 0); width: 100%; padding: 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;"&gt;For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
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    <oef:CreditQualityExplanationTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_53_a53a39ec_05b8_69f9_33b1_84707daedda0">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
    <oef:CreditRatingsSelectionTextBlock
      contextRef="FY2025_C000195949Member"
      id="t_52_a7deae30_4971_6e40_a776_b154d467aea0">For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&amp;amp;P Global Ratings or Moody&#x2019;s Investors Service, Inc. if ratings differ.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2025_C000166149Member"
      id="t_46_37f752ec_a37d_528b_f277_3a7ea9f9435b">iShares Short-Term TIPS Bond Index Fund</oef:FundName>
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      id="t_47_9bba928b_4568_6104_c60d_65ce62f2217f">Institutional Shares</oef:ClassName>
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      contextRef="FY2025_C000166149Member"
      id="t_48_8ea98ee5_6a31_8ae2_03c7_5c2509b49bf4">BIIPX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_37_7132bc1a_b405_4bc3_938f_4c5acbfcba0d">This annual shareholder report contains important information about iShares Short-Term TIPS Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2025_C000166149Member"
      id="t_38_ceda3688_ee74_49b4_88f7_f42a90e217fd">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2025_C000166149Member"
      id="t_39_e55f3565_9ee0_48b4_85c5_6016fe21b4f8">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000166149Member"
      id="t_40_038ecb42_73c4_42df_9235_8f0e1e23af83">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000166149Member"
      id="t_41_571db8e8_b9d7_425c_95dc_d05243e6da3a">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
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      contextRef="FY2025_C000166149Member"
      id="t_49_4ddf5d64_8339_e206_2b39_6f1f0628e078">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt; &lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside:avoid;margin-top:2pt;table-layout:auto;width:100%;border-collapse:collapse"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: left;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs of a $10,000&lt;br/&gt; investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs paid as a percentage of a&lt;br/&gt; $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; font-size: 8pt; line-height: 10pt; text-align: left;"&gt;Institutional Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;0.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000166149Member"
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      id="h_104_23f109cd_ad51_4c4e_a68b_645968397793"
      unitRef="USD">7</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_105_a9190ccc_3649_4d17_9cbd_d3cb550c612f"
      unitRef="pure">0.0007</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_50_0d990151_556c_e23f_8008_163d2a97a94a">&lt;div style="margin-bottom:0px;"&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;margin-top:0px;"&gt; &lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt; &lt;/div&gt; &lt;ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 3.5pt; margin-right: 0; margin-bottom: 3.5pt; margin-left: 0; break-inside: avoid;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Institutional Shares returned 6.02%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Broad Market Index returned 7.15% and the Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L) returned 6.07%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;The principal value for TIPS is indexed to inflation, meaning that the principal value is adjusted higher every six months as inflation rises and adjusted lower when inflation falls. In addition, the stated yield is applied to the adjusted principal value. As a result, TIPS trade higher when investors expect inflation to rise and trade lower when the opposite is the case. Returns for TIPS are also influenced by the direction of nominal Treasury yields. The Fund's cash position had no material impact on performance.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;During the period, prices for short-term TIPS were supported by relatively stable inflation expectations and a decline in nominal Treasury yields that was fueled, in part, by the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts. The benchmark finished with a positive return as a result. (Prices and yields move in opposite directions.)&lt;/div&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;There were no detractors from absolute performance.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt; &lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt; &lt;/div&gt; &lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_51_d9863cbe_65e0_076a_bb29_049081cd3c92">&lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-bottom:5pt;"&gt; &lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;Fund performance &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Cumulative performance: February 16, 2016 through December 31, 2025 &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:5pt;margin-bottom:5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654439.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left:10pt;margin-bottom:7.2pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;text-indent:-10pt;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_52_01cbc294_15e3_c001_7e68_e91d5eeec655">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;Average annual total returns&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Since Fund&lt;br/&gt; Inception&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; padding-right: 0; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Institutional Shares&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;6.02&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.45&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.11&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;7.15&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;(0.42&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;1.84&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&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; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;6.07&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.54&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.20&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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      id="t_59_7223a603_0eb3_437e_ee81_0ca0fb573cca">Institutional Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000166149Member"
      decimals="4"
      id="h_129_920bcaf4_12a1_bdec_f186_51a7222f9e21"
      unitRef="pure">0.0602</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000166149Member"
      decimals="4"
      id="h_130_99b8e251_9a4d_bca2_79ba_86c4ad389cca"
      unitRef="pure">0.0345</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_C000166149Member"
      decimals="4"
      id="h_131_b4d1690e_748b_28c2_27eb_d871728f5d40"
      unitRef="pure">0.0311</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_ICEBofAUSBroadMarketIndexMember"
      id="t_60_c30eb4ae_198a_ee54_5e89_4cd250548344">ICE BofA US Broad Market Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_106_ee742179_eeaa_42d1_a195_402d8b0e3d28"
      unitRef="pure">0.0715</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_107_b072a444_e300_4ef9_ac84_2e35a4cad053"
      unitRef="pure">-0.0042</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_108_d077c327_b0d4_4464_992a_f662287d1f63"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      id="t_61_5fc985c4_1d75_ca59_a8b4_9de98a63f9c7">Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_109_5ed4ec77_992d_4168_8e66_b0a4a410d4cc"
      unitRef="pure">0.0607</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_110_bc3da921_0204_4f37_845c_63520e52d047"
      unitRef="pure">0.0354</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_111_2d2456e2_680a_4fea_bfe1_b5f357804dfa"
      unitRef="pure">0.0320</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_53_162f239d_445a_a0b7_898b_3c532b903047">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-left: 0; padding-right: 0; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-bottom: 1.5pt; margin-bottom: 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-left: 6pt; padding-right: 6pt; font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,189,202,541&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;27&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;33,306&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; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 1.6pt; text-indent: -6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 1.6pt;"&gt;12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_112_d6f23f10_d853_488c_b03a_f58a96f2d08c"
      unitRef="USD">1189202541</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20251231_C000166149Member"
      decimals="INF"
      id="h_113_86253659_1196_42b8_aa9f_b846f20ba33d"
      unitRef="Holding">27</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000166149Member"
      decimals="INF"
      id="h_114_3fb2f79f_43ca_4188_b7b8_cdd9f8e12479"
      unitRef="USD">33306</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000166149Member"
      decimals="4"
      id="h_115_32775786_dd94_4a9a_b954_15bcddfcb261"
      unitRef="pure">0.12</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="FY2025_C000166149Member"
      id="t_58_9b7b0af5_38c7_2c0e_cdb3_48eed7fd7ac7">2016-02-16</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000166149Member"
      id="t_54_8f7f91a4_3ae3_5e06_1d5d_fb2bd109c65d">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2025_C000166149Member"
      id="t_55_48297bd3_9cf5_a34b_7b62_c39b42cb1a3b">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_56_73fdd7fa_f646_9b7a_83ff_c4b00adb9dc6">Visit &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_45_554f655f_d1f2_472a_86ed_99b477126db0">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';text-align:justify;font-size:9pt;line-height:11.4pt;color:rgb(0, 0, 0);margin-bottom:0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Maturity allocation&lt;/strong&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; width: auto; white-space: nowrap;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; white-space: nowrap;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt; width: auto;"&gt;Period&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; width: auto; white-space: nowrap;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; white-space: nowrap;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;1-2 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;23.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;2-3 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;26.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;3-4 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;26.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;4-5 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;23.9&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Ten largest holdings&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Security&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.13%, 10/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 04/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.1&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 04/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 07/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.5&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.50%, 01/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_OneTo2YearsMember"
      decimals="4"
      id="h_132_e24f51f1_8e2d_f5cb_540f_66d8a4c901fc"
      unitRef="pure">0.238</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_TwoTo3YearsMember"
      decimals="4"
      id="h_116_dbf0543f_97ff_4298_9eff_9348828df1b0"
      unitRef="pure">0.263</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_ThreeTo4YearsMember"
      decimals="4"
      id="h_117_5dca1fb4_5eb0_4972_b7e9_6bc83c12417f"
      unitRef="pure">0.260</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_FourTo5YearsMember"
      decimals="4"
      id="h_118_67253104_8d53_4654_84a9_8b82d8d2d13a"
      unitRef="pure">0.239</oef:PctOfTotalInv>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2025_C000166149Member"
      id="t_57_f1e03ce4_d99d_880a_f80c_c2a8bf3efacc">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Ten largest holdings&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Security&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.13%, 10/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 04/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.1&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 04/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 07/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.5&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.50%, 01/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes113101530Member"
      decimals="4"
      id="h_119_ec37baa3_32ce_4170_9255_eb13f346ca4c"
      unitRef="pure">0.054</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes163041530Member"
      decimals="4"
      id="h_120_bece818c_6268_4335_b7c0_3d9d923661cb"
      unitRef="pure">0.054</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes163101529Member"
      decimals="4"
      id="h_121_ce3d540c_fe75_4223_9ac6_9d2bd8d22668"
      unitRef="pure">0.052</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes213041529Member"
      decimals="4"
      id="h_122_94b2831a_f48c_4a54_bd02_4490376c6625"
      unitRef="pure">0.051</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes238101528Member"
      decimals="4"
      id="h_123_9ab27223_4bb4_483c_8655_990e0f4e8ffc"
      unitRef="pure">0.050</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes163101527Member"
      decimals="4"
      id="h_124_8f241546_3dcb_4be0_886a_ae05f541dea1"
      unitRef="pure">0.048</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes125041528Member"
      decimals="4"
      id="h_125_efd6bd25_eb19_439c_bf43_9348e9e4217d"
      unitRef="pure">0.047</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes013041527Member"
      decimals="4"
      id="h_126_744e4fdf_a48f_404f_8c4e_1d4fbed61dd5"
      unitRef="pure">0.047</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes013071530Member"
      decimals="4"
      id="h_127_9ce0c437_43e5_4b5c_852f_e9ba49a3d97c"
      unitRef="pure">0.045</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166149Member_USTreasuryInflationIndexedNotes050011528Member"
      decimals="4"
      id="h_128_bd7a6ae6_4606_4a13_a4e8_d08e07798e2c"
      unitRef="pure">0.043</oef:PctOfTotalInv>
    <oef:FundName
      contextRef="FY2025_C000166148Member"
      id="t_55_abfaef18_e477_2507_993a_b89516734c14">iShares Short-Term TIPS Bond Index Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2025_C000166148Member"
      id="t_56_504782e0_6f3a_e5f7_d455_911e7d7b3daa">Investor A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000166148Member"
      id="t_57_8fc2b785_7c73_7e04_6e12_702c2c5eb6f6">BAIPX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_46_de76080a_24d7_4703_95bf_1e8b8d937631">This annual shareholder report contains important information about iShares Short-Term TIPS Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000166148Member"
      id="t_47_46c1f929_41b3_44f2_9e4f_84f2b3f1eb91">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_48_644f14d0_b84f_459b_9960_f91dc8e97256">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000166148Member"
      id="t_49_56844665_06b4_4ce7_9a31_4fb297a06f10">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000166148Member"
      id="t_50_7a501794_dc14_4fb0_b11d_cb6648606b32">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_58_8bfd35aa_952e_6f32_ba29_736e27f9f726">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt; &lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside:avoid;margin-top:2pt;table-layout:auto;width:100%;border-collapse:collapse"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: left;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs of a $10,000&lt;br/&gt; investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs paid as a percentage of a&lt;br/&gt; $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; font-size: 8pt; line-height: 10pt; text-align: left;"&gt;Investor A Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;37&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;0.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000166148Member"
      decimals="INF"
      id="h_129_995ba614_6144_4081_b238_cfafce6d1935"
      unitRef="USD">37</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2025_C000166148Member"
      decimals="4"
      id="h_130_806fec64_be8f_48d5_92e4_c149b06a5190"
      unitRef="pure">0.0036</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_59_d0d349d6_21b1_87fc_379e_b024e44513fc">&lt;div style="margin-bottom:0px;"&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;margin-top:0px;"&gt; &lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt; &lt;/div&gt; &lt;ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 3.5pt; margin-right: 0; margin-bottom: 3.5pt; margin-left: 0; break-inside: avoid;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Investor A Shares returned 5.73%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Broad Market Index returned 7.15% and the Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L) returned 6.07%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;The principal value for TIPS is indexed to inflation, meaning that the principal value is adjusted higher every six months as inflation rises and adjusted lower when inflation falls. In addition, the stated yield is applied to the adjusted principal value. As a result, TIPS trade higher when investors expect inflation to rise and trade lower when the opposite is the case. Returns for TIPS are also influenced by the direction of nominal Treasury yields. The Fund's cash position had no material impact on performance.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;During the period, prices for short-term TIPS were supported by relatively stable inflation expectations and a decline in nominal Treasury yields that was fueled, in part, by the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts. The benchmark finished with a positive return as a result. (Prices and yields move in opposite directions.)&lt;/div&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;There were no detractors from absolute performance.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt; &lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt; &lt;/div&gt; &lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_60_82fe1c37_a203_97de_01bc_728cad3c8d10">&lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-bottom:5pt;"&gt; &lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;Fund performance &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Cumulative performance: February 16, 2016 through December 31, 2025 &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:5pt;margin-bottom:5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654426.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left:10pt;margin-bottom:7.2pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;text-indent:-10pt;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_61_8b1427a4_c0fe_b171_383d_0521aabeb0ad">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;Average annual total returns&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Since Fund&lt;br/&gt; Inception&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; padding-right: 0; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Investor A Shares&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;5.73&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.18&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;2.83&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;7.15&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;(0.42&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;1.84&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&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; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;6.07&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.54&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.20&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_68_cd867f55_2a83_6ba0_63ef_1acfa7450b1a">Investor A Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000166148Member"
      decimals="4"
      id="h_155_e06179b7_f86d_9dc1_0839_052761568c05"
      unitRef="pure">0.0573</oef:AvgAnnlRtrPct>
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      id="h_156_d559555e_8cc5_7f2c_649a_8dcd8423842e"
      unitRef="pure">0.0318</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_C000166148Member"
      decimals="4"
      id="h_157_4d4632bb_eeb5_f448_dd88_46f22a90a887"
      unitRef="pure">0.0283</oef:AvgAnnlRtrPct>
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      contextRef="FY2025_ICEBofAUSBroadMarketIndexMember"
      id="t_69_6226f457_b845_3c00_1888_7f8f67934a4f">ICE BofA US Broad Market Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_131_86a1a864_f491_4a77_b5fa_8ca29837ecd2"
      unitRef="pure">0.0715</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_132_4aca410b_0f14_4467_bbc6_bbe364e5b1fe"
      unitRef="pure">-0.0042</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_133_b5589f81_1470_48c9_8d08_e726ef7a3c01"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      id="t_70_fbbe4317_ab40_993f_631b_1802ff006c20">Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_134_990d69e4_5df1_4c72_9a22_c52428ccdf14"
      unitRef="pure">0.0607</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_135_99c30897_0b45_4331_ae01_7bc68d5e144b"
      unitRef="pure">0.0354</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_136_8939955e_b5fd_41f4_8950_3772bb52cbd9"
      unitRef="pure">0.0320</oef:AvgAnnlRtrPct>
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      contextRef="FY2025_C000166148Member"
      id="t_62_6b35ce3f_095b_e148_cb1c_82997f945134">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-left: 0; padding-right: 0; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-bottom: 1.5pt; margin-bottom: 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-left: 6pt; padding-right: 6pt; font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,189,202,541&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;27&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;33,306&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; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 1.6pt; text-indent: -6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 1.6pt;"&gt;12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      id="h_137_8bd28e73_d494_45bb_8667_f56e82f34563"
      unitRef="USD">1189202541</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_138_5e74d361_3f9b_44ee_923e_16fb50fff1fc"
      unitRef="Holding">27</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_139_4ffdde86_2a96_49cf_b9e1_18f4661a1e03"
      unitRef="USD">33306</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000166148Member"
      decimals="4"
      id="h_140_6414ad61_cddc_4fe3_a9b0_cc80451b7d1e"
      unitRef="pure">0.12</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="FY2025_C000166148Member"
      id="t_67_26b898ae_3388_9c6f_1a49_e1aced781887">2016-02-16</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
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      id="t_63_016556e5_372f_ed44_30f1_9d39bdedbef2">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2025_C000166148Member"
      id="t_64_ee7cffc5_6ce6_6c5c_9328_eb249193ca21">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_65_f126cec5_9497_4854_ae0b_d5819cb3dae3">Visit &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_54_9041cba5_ee48_4363_87eb_a80f5441f6fb">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';text-align:justify;font-size:9pt;line-height:11.4pt;color:rgb(0, 0, 0);margin-bottom:0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Maturity allocation&lt;/strong&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; width: auto; white-space: nowrap;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; white-space: nowrap;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt; width: auto;"&gt;Period&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; width: auto; white-space: nowrap;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; white-space: nowrap;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;1-2 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;23.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;2-3 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;26.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;3-4 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;26.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;4-5 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;23.9&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Ten largest holdings&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Security&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.13%, 10/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 04/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.1&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 04/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 07/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.5&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.50%, 01/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_OneTo2YearsMember"
      decimals="4"
      id="h_154_585101d6_4207_5bee_c5de_06a7da8d132a"
      unitRef="pure">0.238</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_TwoTo3YearsMember"
      decimals="4"
      id="h_141_9acf483c_7192_4e61_b47e_c77c95dfc555"
      unitRef="pure">0.263</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_ThreeTo4YearsMember"
      decimals="4"
      id="h_142_0cfa6bad_ecba_4b3d_af29_86d541c98d81"
      unitRef="pure">0.260</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_FourTo5YearsMember"
      decimals="4"
      id="h_143_b1d3efa1_947d_42de_8b0b_d48312d47d14"
      unitRef="pure">0.239</oef:PctOfTotalInv>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2025_C000166148Member"
      id="t_66_cee76f38_7a58_7940_3e26_a5a6c948c438">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Ten largest holdings&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Security&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.13%, 10/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 04/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.1&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 04/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 07/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.5&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.50%, 01/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes113101530Member"
      decimals="4"
      id="h_144_28c265c8_d2f6_41d7_9ed0_ec0982929083"
      unitRef="pure">0.054</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes163041530Member"
      decimals="4"
      id="h_145_261665cb_258d_48a8_b72f_69070193264c"
      unitRef="pure">0.054</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes163101529Member"
      decimals="4"
      id="h_146_d78b5f2f_c304_4b3e_8e4d_3e047bff5585"
      unitRef="pure">0.052</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes213041529Member"
      decimals="4"
      id="h_147_940700b8_8fe9_4809_a2a5_33d6b9e6cbd2"
      unitRef="pure">0.051</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes238101528Member"
      decimals="4"
      id="h_148_28250d2c_0a2c_4ebb_a557_74b17e5c4309"
      unitRef="pure">0.050</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes163101527Member"
      decimals="4"
      id="h_149_449dd877_8d5d_477d_97f6_89c1c998ff7b"
      unitRef="pure">0.048</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes125041528Member"
      decimals="4"
      id="h_150_b1c27bad_134b_44c0_ad6c_b8436eb13d42"
      unitRef="pure">0.047</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes013041527Member"
      decimals="4"
      id="h_151_53077080_f85a_432d_a251_641e8f3f4dd9"
      unitRef="pure">0.047</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes013071530Member"
      decimals="4"
      id="h_152_200fa541_6662_443e_b57a_b7d0330580fa"
      unitRef="pure">0.045</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166148Member_USTreasuryInflationIndexedNotes050011528Member"
      decimals="4"
      id="h_153_3feaf3f8_5121_48d6_977b_788e64f3b231"
      unitRef="pure">0.043</oef:PctOfTotalInv>
    <oef:FundName
      contextRef="FY2025_C000166150Member"
      id="t_64_b1f8ad34_c55b_516a_7526_3bc4adff631e">iShares Short-Term TIPS Bond Index Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2025_C000166150Member"
      id="t_65_fcc70de5_cdd8_be04_9fd7_e4282fcac07d">Class K Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000166150Member"
      id="t_66_23174479_ec12_fe33_4e5f_c14062b6c40f">BKIPX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_55_172a7de9_0e10_4c34_b0a9_ef1926ff23f7">This annual shareholder report contains important information about iShares Short-Term TIPS Bond Index Fund (the &#x201c;Fund&#x201d;) for the period of January 1, 2025 to December 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000166150Member"
      id="t_56_2867e272_8682_43af_b645_fdf0c3d82900">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_57_b439997e_4b9f_4142_ad01_21550f0d9988">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000166150Member"
      id="t_58_96dab2da_46d0_4ae3_b438_01d6a790169b">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000166150Member"
      id="t_59_5c028ef0_8a1a_40c1_aa8c_bd289e9a842f">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_67_9589c2bb_abf0_cb76_842a_8bc7b2fad5e6">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt; &lt;b&gt;What were the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; costs for the &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside:avoid;margin-top:2pt;table-layout:auto;width:100%;border-collapse:collapse"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: left;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs of a $10,000&lt;br/&gt; investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 206, 0); text-align: center; padding-top: 2pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0;"&gt;Costs paid as a percentage of a&lt;br/&gt; $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); overflow-x: hidden; padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; font-size: 8pt; line-height: 10pt; text-align: left;"&gt;Class K Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); padding-top: 4pt; padding-right: 0; padding-bottom: 2pt; padding-left: 0; text-align: center; font-size: 8pt; line-height: 10pt;"&gt;0.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000166150Member"
      decimals="INF"
      id="h_154_d55351b5_067e_4aeb_85f3_ae257858b31f"
      unitRef="USD">5</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2025_C000166150Member"
      decimals="4"
      id="h_155_ea23233a_b93f_497e_aed2_1b25917173bf"
      unitRef="pure">0.0005</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_68_a804f263_b5ff_d4f4_8038_ca311869df13">&lt;div style="margin-bottom:0px;"&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;margin-top:0px;"&gt; &lt;b&gt;How did the &lt;/b&gt; &lt;b&gt;Fund&lt;/b&gt; &lt;b&gt; perform &lt;/b&gt; &lt;b&gt;last year&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt; &lt;/div&gt; &lt;ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 3.5pt; margin-right: 0; margin-bottom: 3.5pt; margin-left: 0; break-inside: avoid;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the reporting period ended December 31, 2025, the Fund&#x2019;s Class K Shares returned 6.06%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: rgb(0, 0, 0); margin-left: 34px;"&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;"&gt;For the same period, the Fund&#x2019;s benchmark, the ICE BofA US Broad Market Index returned 7.15% and the Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L) returned 6.07%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What contributed to performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;The principal value for TIPS is indexed to inflation, meaning that the principal value is adjusted higher every six months as inflation rises and adjusted lower when inflation falls. In addition, the stated yield is applied to the adjusted principal value. As a result, TIPS trade higher when investors expect inflation to rise and trade lower when the opposite is the case. Returns for TIPS are also influenced by the direction of nominal Treasury yields. The Fund's cash position had no material impact on performance.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;During the period, prices for short-term TIPS were supported by relatively stable inflation expectations and a decline in nominal Treasury yields that was fueled, in part, by the U.S. Federal Reserve&#x2019;s decision to enact three quarter-point interest rate cuts. The benchmark finished with a positive return as a result. (Prices and yields move in opposite directions.)&lt;/div&gt; &lt;div style="break-inside:avoid;margin-bottom:3.5pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:normal;font-size:10pt;letter-spacing:normal;text-transform:none;color:rgb(0, 0, 0);margin-bottom:5pt;"&gt;What detracted from performance?&lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt;There were no detractors from absolute performance.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify;color:rgb(0, 0, 0);margin-bottom:3.5pt;"&gt; &lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt; &lt;/div&gt; &lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_69_27b6f7d6_e4d5_1d57_1833_5eaf9e3db97c">&lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-bottom:5pt;"&gt; &lt;div style="break-inside:avoid;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;Fund performance &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Cumulative performance: February 16, 2016 through December 31, 2025 &lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:0px;margin-bottom:0px;font-kerning:none;font-family:'arial';font-size:9pt;color:rgb(0, 0, 0);"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top:5pt;margin-bottom:5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g62933chartimages_6654492.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left:10pt;margin-bottom:7.2pt;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;text-indent:-10pt;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#160;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_70_ead7c5ce_20d3_f597_d053_6a3d80c5e9a3">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; width: auto; font-family: 'Arial'; font-weight: bold; font-style: normal; font-size: 10pt; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;Average annual total returns&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0; width: auto;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: 60%; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Since Fund&lt;br/&gt; Inception&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; width: auto; padding-right: 0; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; white-space: nowrap; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-bottom: 0; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Class K Shares&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;6.06&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.48&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.13&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;7.15&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;(0.42&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;1.84&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&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; vertical-align: bottom; padding-top: 2pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; font-kerning: none; text-align: left; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt;"&gt;Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;6.07&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.54&lt;/td&gt;
&lt;td style="padding-left: 0; padding-right: 6pt; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); width: auto; font-size: 8pt; line-height: 10pt;"&gt;3.20&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000166150Member"
      id="t_76_a34be5a2_0499_1e00_893f_23e187115c1e">Class K Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000166150Member"
      decimals="4"
      id="h_179_99de395e_338e_fc2a_923d_655b250d7154"
      unitRef="pure">0.0606</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000166150Member"
      decimals="4"
      id="h_181_d61e14bc_8d89_0372_ba74_3b4345e57096"
      unitRef="pure">0.0348</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_C000166150Member"
      decimals="4"
      id="h_182_00b3d327_fd5f_76ce_7482_64fe4d4416e4"
      unitRef="pure">0.0313</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_ICEBofAUSBroadMarketIndexMember"
      id="t_77_143765ae_c338_d51c_6029_2a4e6599ac1c">ICE BofA US Broad Market Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_156_7011fc4f_863d_48af_80f8_a9da6630a452"
      unitRef="pure">0.0715</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_157_3ce86020_175f_47bf_90b6_2708d57e264e"
      unitRef="pure">-0.0042</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_158_53917e61_eab0_47d4_8aa1_405a4f9942d3"
      unitRef="pure">0.0184</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      id="t_78_2c7fdf63_74b7_a285_bd96_41aa8e5736b0">Bloomberg U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Years Index (Series-L)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_159_c83a6770_336e_4a0b_a8a1_e777c8cf25d9"
      unitRef="pure">0.0607</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_160_f5c47b34_9f84_4518_918b_cd15e402c859"
      unitRef="pure">0.0354</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20160216_20251231_BloombergUSTreasuryInflationProtectedSecuritiesTIPS05YearsIndexSeriesLMember"
      decimals="4"
      id="h_161_71bc4fa3_f56e_4d5f_ad1e_269ebefd606f"
      unitRef="pure">0.0320</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_71_1aa803dd_85bb_4755_05f3_4ae928f33f7c">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; padding-left: 0; padding-right: 0; width: auto; font-family: 'Arial'; font-weight: bold; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-bottom: 1.5pt; margin-bottom: 0;"&gt;Key Fund statistics&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; padding-left: 6pt; padding-right: 6pt; font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,189,202,541&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;27&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 0; text-indent: -6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 0;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;33,306&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; vertical-align: bottom; font-kerning: none; padding-left: 6pt; padding-right: 6pt; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-bottom: 1.6pt; text-indent: -6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-left: 6pt; padding-right: 6pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; line-height: 10pt; width: 12%; padding-top: 1.6pt; padding-bottom: 1.6pt;"&gt;12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20251231_C000166150Member"
      decimals="INF"
      id="h_162_a67c5f10_6d3e_4e7c_bc1b_1eb6e04c7b03"
      unitRef="USD">1189202541</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20251231_C000166150Member"
      decimals="INF"
      id="h_163_bf33c5f1_83cd_4ae5_89d8_8088e9bb255c"
      unitRef="Holding">27</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000166150Member"
      decimals="INF"
      id="h_164_1ad69bc3_aafd_4faa_8c08_76d77bd924d5"
      unitRef="USD">33306</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000166150Member"
      decimals="4"
      id="h_165_990d2dd3_3115_432a_8ae1_cd6c0c9704a7"
      unitRef="pure">0.12</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="FY2025_C000166150Member"
      id="t_79_42226f3a_36ff_2c53_f4c4_d2b2ff8c0032">2016-02-16</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000166150Member"
      id="t_72_cdf83065_55f5_4e21_21fa_c953ca28defe">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2025_C000166150Member"
      id="t_73_ea6e9d31_9344_b6f9_6d9a_e4e41752be39">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_74_e5954f39_427b_e237_144f_25160a907388">Visit &lt;span style="color:rgb(0, 0, 0);font-weight:bold;text-decoration-line:none;font-family:'arial';font-size:8pt;line-height:10.4pt;text-align:justify"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_63_37387be7_1444_4642_8302_39f5c4178f65">&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-weight:bold;font-size:10pt;color:rgb(0, 0, 0);margin-bottom:-0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;&lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';text-align:justify;font-size:9pt;line-height:11.4pt;color:rgb(0, 0, 0);margin-bottom:0px;"&gt;(as of December 31, 2025)&lt;/div&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 0; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Maturity allocation&lt;/strong&gt;&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; width: auto; white-space: nowrap;"&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; white-space: nowrap;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt; width: auto;"&gt;Period&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; width: auto; white-space: nowrap;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; width: auto; white-space: nowrap;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;1-2 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;23.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;2-3 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;26.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;3-4 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;26.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-family: 'Arial'; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;4-5 Years&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;23.9&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Ten largest holdings&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Security&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.13%, 10/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 04/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.1&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 04/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 07/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.5&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.50%, 01/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166150Member_OneTo2YearsMember"
      decimals="4"
      id="h_180_e829ad85_4d0c_2930_7ddb_d872a66d98c9"
      unitRef="pure">0.238</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166150Member_TwoTo3YearsMember"
      decimals="4"
      id="h_166_7c28f2a7_30cd_469a_a91d_733213093131"
      unitRef="pure">0.263</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166150Member_ThreeTo4YearsMember"
      decimals="4"
      id="h_167_480165e5_3537_4f14_9fa2_3e202a66c411"
      unitRef="pure">0.260</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20251231_C000166150Member_FourTo5YearsMember"
      decimals="4"
      id="h_168_5c120e6c_f4ce_413e_8163_34813d91aab1"
      unitRef="pure">0.239</oef:PctOfTotalInv>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2025_C000166150Member"
      id="t_75_d3d45e52_4087_b4ff_8670_bb9a140d5505">
&lt;table style="break-inside:avoid;table-layout:auto;width:100%;border-collapse:collapse;margin-top:0px"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;background-color:rgb(255, 206, 0);border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td colspan="3" style="break-inside: avoid-page; vertical-align: bottom; white-space: nowrap; width: auto; font-family: 'Arial'; font-weight: normal; font-style: normal; font-size: 10pt; line-height: normal; text-align: left; text-indent: 0; letter-spacing: normal; text-transform: none; font-kerning: none; color: rgb(0, 0, 0); margin-top: 0; padding-top: 2pt; padding-right: 6pt; padding-bottom: 1.5pt; padding-left: 0; margin-bottom: 0;"&gt;&lt;strong&gt;Ten largest holdings&lt;/strong&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-after:avoid;border-bottom-style:solid;border-bottom-width:0.5pt;break-inside:avoid-page;height:auto;font-family:'arial';font-style:italic;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;Security&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; white-space: nowrap; padding-top: 1.6pt; padding-bottom: 0; padding-left: 0;"&gt;Percent of Total&lt;br/&gt; Investments&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="padding-left: 0; width: auto; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.13%, 10/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 04/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.4&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.2&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.13%, 04/15/29&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.1&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 2.38%, 10/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;5.0&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.63%, 10/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.8&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 1.25%, 04/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 04/15/27&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.7&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.13%, 07/15/30&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 0; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.5&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&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;font-family:'arial';font-style:normal;font-size:8pt;line-height:10pt;border-bottom-color:rgb(0, 0, 0)"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; padding-left: 6pt; text-indent: -6pt;"&gt;U.S. Treasury Inflation-Indexed Notes, 0.50%, 01/15/28&lt;/td&gt;
&lt;td style="padding-right: 0; break-inside: avoid-page; vertical-align: bottom; text-align: right; padding-top: 2pt; padding-bottom: 1.6pt; padding-left: 0; font-kerning: none; color: rgb(0, 0, 0); width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;4.3&lt;/td&gt;
&lt;td style="padding-left: 0; break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: rgb(0, 0, 0); text-align: left; padding-top: 1.6pt; padding-right: 0; padding-bottom: 1.6pt; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;&lt;span style="visibility:hidden;margin-left:-7pt"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse:collapse;break-inside:avoid;width:100%;margin-top:0px"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; padding-top: 1.6pt; padding-right: 6pt; padding-bottom: 0; padding-left: 0; vertical-align: top; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; width: initial; text-indent: 0; color: rgb(0, 0, 0);"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;&#x200b;&lt;sup style="vertical-align:0.5em;font-size:smaller;line-height:0px"&gt;(a)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; text-indent: 0; color: rgb(0, 0, 0); padding-top: 1.6pt; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 100%;"&gt; &lt;div style="margin-top:0px;font-kerning:none;font-family:'arial';font-style:normal;font-size:7pt;line-height:9pt;text-align:justify;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;"&gt;Excludes short-term securities.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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