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      id="t_9_047931a9_b8d5_93c1_9dc3_17ce3c5c2d6b"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
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&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares 10+ Year Investment Grade Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;/td&gt;
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&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; 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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
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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: #000000; margin-top: 0; margin-bottom: 0; padding: 2pt 0 1.5pt 0;"&gt;Average annual total returns&lt;/td&gt;
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&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; 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: #000000; 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: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
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&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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.20&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(1.14&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.52&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.88&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.10&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(1.17&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.44&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.35&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; 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&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; BofA&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; 10+ Year US Corporate Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.72&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;10.31&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(1.04&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.72&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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      contextRef="D20240301_20240831_ICEBofA10PlusYearUSCorporateIndexMember"
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    <oef:AvgAnnlRtrPct
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    <oef:AvgAnnlRtrPct
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; white-space: nowrap; font-kerning: none; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2,575,457,214&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;3,694&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;3&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_19_6d35660d_7de3_453e_b0c5_e3043a1918e5"
      unitRef="USD">2575457214</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_20_a15459ae_2dd8_46d1_998f_1209faff8137"
      unitRef="Holding">3694</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000080009Member"
      decimals="4"
      id="h_21_a9b80c38_017e_4b0c_8453_fea8b68c5735"
      unitRef="pure">0.03</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="D20240301_20240831_C000080009Member"
      id="t_12_d5519c93_f914_7edc_ffe0_51e33b353e6a">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="D20240301_20240831_C000080009Member"
      id="t_21_7e2f8171_5970_9770_c11e_85ea0066f9c0">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="D20240301_20240831_C000080009Member"
      id="t_14_95847624_f738_d053_9383_da335cd8db11">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000080009Member"
      id="t_15_6ce3143b_c8bf_7131_39c8_ca9afc2659d9"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;3.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;9.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;42.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;42.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;1.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt; &lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;15.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;21.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;63.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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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      contextRef="D20240301_20240831_C000037539Member"
      id="t_9_d44c633e_5496_3a94_d2e5_a198385291b2"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares 1-5 Year Investment Grade Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.04&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; 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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000037539Member"
      decimals="INF"
      id="h_49_006abafb_dc5e_3f41_6a5b_34aaefeef97c"
      unitRef="USD">2</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000037539Member"
      decimals="4"
      id="h_50_cdb111af_8ad0_7f1e_160d_501fdf20b04f"
      unitRef="pure">0.0004</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000037539Member"
      id="t_10_88ea517c_0768_b321_5c6b_7d3a4b5907c7">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.41&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.11&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.14&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.53&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.19&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.15&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.35&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; 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&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; BofA&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; 1-5 Year US Corporate Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.40&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;8.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.10&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.26&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="D20240301_20240831_C000037539Member"
      id="t_16_621755cd_ef78_7823_f854_842d94dbfc7a">Fund NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_C000037539Member"
      decimals="4"
      id="h_51_1fe0a284_1beb_c9ac_b86a_e6011163d9a4"
      unitRef="pure">0.0441</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000037539Member"
      decimals="4"
      id="h_52_9219730b_9f24_4fde_f253_2598fee6395a"
      unitRef="pure">0.0811</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000037539Member"
      decimals="4"
      id="h_53_402c8d29_9145_2163_2ac5_56461e661e57"
      unitRef="pure">0.0208</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000037539Member"
      decimals="4"
      id="h_54_6812a94c_35c7_93a8_0a42_e888fa88f37c"
      unitRef="pure">0.0214</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_C000037539Member_WithoutSalesLoadMember"
      id="t_17_cf831559_fcde_638c_db82_ecfd24384e6a">Fund Market</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_C000037539Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_28_1cffce2f_6c43_400b_9915_af6a8321e965"
      unitRef="pure">0.0453</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000037539Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_29_e579baf4_8307_4206_9060_c78695d0392c"
      unitRef="pure">0.0819</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000037539Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_30_d9b02c7e_7a34_4a5e_8e47_9f77a342f937"
      unitRef="pure">0.0209</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000037539Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_31_69c0404c_1ceb_463d_9d31_e05c48252fb9"
      unitRef="pure">0.0215</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_ICEBofAUSBroadMarketIndexMember"
      id="t_18_04f834cb_1ff2_17df_bb5d_445ebbaab9a8">ICE BofA US Broad Market Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_32_403d52d3_24c5_4c17_ae13_ba689a9b2b6a"
      unitRef="pure">0.0485</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_33_3ed16126_9e50_40c3_8680_0765dd6b19a2"
      unitRef="pure">0.0735</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_34_a5928391_0f6d_4e4f_8836_900885898a07"
      unitRef="pure">-0.0008</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_35_8ca97cf4_8aed_482b_9f53_37836a1aca4f"
      unitRef="pure">0.0167</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_ICEBofA15YearUSCorporateIndexMember"
      id="t_19_ccb1df1f_4cea_09e4_a380_a31f9f74e394">ICE&#xae; BofA&#xae; 1-5 Year US Corporate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_ICEBofA15YearUSCorporateIndexMember"
      decimals="4"
      id="h_36_6a2b627c_d92a_4873_a049_efcea137031c"
      unitRef="pure">0.0440</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_ICEBofA15YearUSCorporateIndexMember"
      decimals="4"
      id="h_37_2e46370c_daf9_4a43_910c_23de4b82951d"
      unitRef="pure">0.0808</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_ICEBofA15YearUSCorporateIndexMember"
      decimals="4"
      id="h_38_944f6b82_8f26_4839_871d_ed69d68daa12"
      unitRef="pure">0.0210</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_ICEBofA15YearUSCorporateIndexMember"
      decimals="4"
      id="h_39_dcd3fb9d_df2a_4087_8cfe_555b0f3bd8f2"
      unitRef="pure">0.0226</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240301_20240831_C000037539Member"
      id="t_11_8ea5ad99_8291_e218_2a79_259a54e70ab8">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;20,909,601,543&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;3,941&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000037539Member"
      decimals="INF"
      id="h_40_d3d3bb39_2c8d_4cae_b3c7_01a157b89e33"
      unitRef="USD">20909601543</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000037539Member"
      decimals="INF"
      id="h_41_8d4114fd_3453_45e9_a316_69b4241d34ab"
      unitRef="Holding">3941</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000037539Member"
      decimals="4"
      id="h_42_394065d9_d7f3_4651_85d2_c4a313d1bb2a"
      unitRef="pure">0.15</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000037539Member"
      id="t_12_a48d9699_aa13_ca78_fedf_6919dc0db0ef">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000037539Member"
      id="t_23_e3291586_3100_1bf5_04d8_1b4bd714758a">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="D20240301_20240831_C000037539Member"
      id="t_14_e11a7909_a144_447d_804e_67b689932b1e">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000037539Member"
      id="t_15_68be993f_b834_d838_ee5a_ace13dca068c"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;1.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;8.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;44.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;41.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;1.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt;Investments&lt;/em&gt; &lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-2 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;23.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;2-3 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;25.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;3-4 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;23.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;4-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;22.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-6 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;4.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;7-8 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;8-9 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;21-22 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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_43_be489ac9_adbb_4e86_bec2_7d6257051d94"
      unitRef="pure">0.019</oef:PctOfTotalInv>
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      id="h_44_2971a1f4_0902_4d1c_ab1b_7770a9c86e0f"
      unitRef="pure">0.083</oef:PctOfTotalInv>
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      id="h_45_0f7be70c_e351_42ef_a4f4_b33c99041ad9"
      unitRef="pure">0.446</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037539Member_BaaMember"
      decimals="4"
      id="h_46_0dec9485_a012_4976_bc36_812804154575"
      unitRef="pure">0.418</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037539Member_BaMember"
      decimals="4"
      id="h_47_97308cb3_e546_4c7c_9ef0_c68de8015b7d"
      unitRef="pure">0.018</oef:PctOfTotalInv>
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      id="h_48_ad09ac58_7e8a_45a6_80c7_edcd73242867"
      unitRef="pure">0.016</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037539Member_OneTo2YearsMember"
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      id="h_55_9be76bc2_c531_c244_741b_e40066d75f17"
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      contextRef="TI20240831_C000037539Member_TwoTo3YearsMember"
      decimals="4"
      id="h_56_1a8e629a_0d9b_9f0d_52fb_392e2615faad"
      unitRef="pure">0.256</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037539Member_ThreeTo4YearsMember"
      decimals="4"
      id="h_57_7a03d7d6_4029_1a33_7631_ccc7fdca2646"
      unitRef="pure">0.235</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037539Member_FourTo5YearsMember"
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      id="h_58_cab7a82b_6c82_2637_a68b_f8779f4967a2"
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      id="h_59_67fd759a_5dcf_141c_5bb4_97ff16fc0a83"
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      contextRef="TI20240831_C000037539Member_SevenTo8YearsMember"
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      id="h_60_2a09564d_c6c0_4545_92ad_9ebd3e1c1c60"
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      id="h_61_36282a2d_730d_0372_d8f0_5a2abdae143b"
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      id="h_62_83bbb537_39e3_6c52_7689_dfc7fb26885e"
      unitRef="pure">0.001</oef:PctOfTotalInv>
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      contextRef="D20240301_20240831_C000037539Member"
      id="t_20_f94dd46c_614b_5aa1_a81d_8b0273569202">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000037539Member"
      id="t_24_817038a3_5889_a5f0_d265_3364ed0c2275">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_1_e294e106_3483_9653_bd2a_04e30e65d725">iShares 5-10 Year Investment Grade Corporate Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_2_a1a08667_6902_0d66_81c6_635cda55bbfc">iShares 5-10 Year Investment Grade Corporate Bond ETF</oef:ClassName>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_4_6d80817d_d055_5e0f_a3e8_8586773d0f9e">This semi-annual shareholder report contains important information about iShares 5-10 Year Investment Grade Corporate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_5_e5ffc757_8cb0_0c35_a51c_860bc0d50b46">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_6_0707a6ef_7253_0a95_31d7_620283996b9b">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_7_c7774abb_b631_a59f_cf9b_37d58306f233">blackrock.com/fundreports</oef:AddlInfoWebsite>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_8_2a4817c4_5406_b39a_9a8e_970067c00dab">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_9_1064a558_d530_79f4_a604_badd1316c99d"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares 5-10 Year Investment Grade Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.04&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000037540Member"
      decimals="INF"
      id="h_70_695fb2a1_fb31_7d10_637c_cbb450cef4da"
      unitRef="USD">2</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000037540Member"
      decimals="4"
      id="h_71_c77454b1_ddd2_18f0_b441_a67bd48c382a"
      unitRef="pure">0.0004</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000037540Member"
      id="t_19_8ad0537f_47f6_0570_683d_fd07270838d2">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.06&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.42&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.33&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.64&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.07&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.50&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.33&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.63&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.35&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; 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&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; BofA&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; 5-10 Year US Corporate Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;6.05&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;10.41&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;1.37&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="D20240301_20240831_C000037540Member"
      id="t_11_e3c904bb_f20e_6307_ba91_90a880c734c3">Fund NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_C000037540Member"
      decimals="4"
      id="h_72_e214081f_f0b8_66cc_d2e4_56395fd5a770"
      unitRef="pure">0.0606</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000037540Member"
      decimals="4"
      id="h_73_054c0804_5702_fbdf_91c2_9be69549eb38"
      unitRef="pure">0.1042</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_74_3f7b517d_eaf1_cad4_01b9_f1642c4dc67f"
      unitRef="pure">0.0133</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000037540Member"
      decimals="4"
      id="h_75_11b9e33b_a11b_b2a0_c361_e142764b7da2"
      unitRef="pure">0.0264</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_C000037540Member_WithoutSalesLoadMember"
      id="t_12_7cf29ed1_dd1e_e5ce_d3c5_6c3eb3ffe4a4">Fund Market</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_C000037540Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_49_df32884f_42ec_46b0_9498_1a24e0ddd0b8"
      unitRef="pure">0.0607</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000037540Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_50_844f9bf6_96e3_4f87_8fd6_c67fd74dc45e"
      unitRef="pure">0.1050</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000037540Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_51_479fe20c_79e3_4311_ae34_299ddb3ad853"
      unitRef="pure">0.0133</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000037540Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_52_de8798ba_9a79_476c_ad28_e1e38ea0f8f3"
      unitRef="pure">0.0263</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_ICEBofAUSBroadMarketIndexMember"
      id="t_13_2454b771_917a_26c5_6ce1_e983950c633a">ICE BofA US Broad Market Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_53_b57df644_bdee_4b1d_81b8_61f5f7b31c30"
      unitRef="pure">0.0485</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_54_d758b2a5_2a32_41f6_944d_4bfcd96771c6"
      unitRef="pure">0.0735</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_55_6b2161e4_432f_4c22_bf76_1ed9d9f02a2c"
      unitRef="pure">-0.0008</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_ICEBofAUSBroadMarketIndexMember"
      decimals="4"
      id="h_56_b3ec2c08_52ed_4414_bc6e_1394cd592655"
      unitRef="pure">0.0167</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_ICEBofA510YearUSCorporateIndexMember"
      id="t_14_eddb0ecb_f3e5_19fc_27b6_ff5f6af5c2f5">ICE&#xae; BofA&#xae; 5-10 Year US Corporate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_ICEBofA510YearUSCorporateIndexMember"
      decimals="4"
      id="h_57_eab910f4_c9c6_4fbf_8199_071fd824bc40"
      unitRef="pure">0.0605</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_ICEBofA510YearUSCorporateIndexMember"
      decimals="4"
      id="h_58_69681cc4_1d89_4ea1_a64e_6a17544861ed"
      unitRef="pure">0.1041</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_ICEBofA510YearUSCorporateIndexMember"
      decimals="4"
      id="h_59_cf403c78_4e9e_4014_a09b_f73d061a25d5"
      unitRef="pure">0.0137</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_ICEBofA510YearUSCorporateIndexMember"
      decimals="4"
      id="h_60_1d1e236a_62b4_4406_abd2_344dac804b42"
      unitRef="pure">0.0275</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240301_20240831_C000037540Member"
      id="t_23_446bfdc8_ffa1_e221_c152_6d769501e900">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;14,310,208,931&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;2,766&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000037540Member"
      decimals="INF"
      id="h_61_82b27d79_f20b_49ef_97f5_51bf03b5fa2a"
      unitRef="USD">14310208931</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000037540Member"
      decimals="INF"
      id="h_62_75d1571c_b589_44f1_9bb2_7efe03876fc9"
      unitRef="Holding">2766</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000037540Member"
      decimals="4"
      id="h_63_f23165a7_91c0_41f4_8d4d_f8814e096c9c"
      unitRef="pure">0.10</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000037540Member"
      id="t_15_fd168d7a_6e52_5f37_3fae_38c9c4edfc09">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000037540Member"
      id="t_16_d515f4e4_1530_748f_4109_e2576027cbe0">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="D20240301_20240831_C000037540Member"
      id="t_17_25e45711_1539_74de_c6a5_86466641c95f">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000037540Member"
      id="t_18_91615587_1e8d_f701_3b5f_81d8404ed66a"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;0.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;41.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;48.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;2.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;2.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt; &lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;92.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;6.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;1.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;&lt;/sup&gt;(a)&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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
      contextRef="TI20240831_C000037540Member_MoodysAaaRatingMember"
      decimals="4"
      id="h_64_776b01aa_3131_4360_96dd_698415631f6a"
      unitRef="pure">0.008</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_AaMember"
      decimals="4"
      id="h_65_d1c66efa_d32d_4d17_a2f6_1c0ce58a2035"
      unitRef="pure">0.053</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_AMember"
      decimals="4"
      id="h_66_a5d67c77_ebab_423b_9dae_4e7095ba9fd6"
      unitRef="pure">0.413</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037540Member_BaaMember"
      decimals="4"
      id="h_67_91198568_2001_462e_95ab_f2b92b7ca8d0"
      unitRef="pure">0.484</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_BaMember"
      decimals="4"
      id="h_68_fd036a40_c5d3_4fb8_9fe8_64a69ce133e9"
      unitRef="pure">0.022</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_NotRatedMember"
      decimals="4"
      id="h_69_06d23e7c_cfc7_4595_90e1_3965ef7266e0"
      unitRef="pure">0.020</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_FiveTo10YearsMember"
      decimals="4"
      id="h_76_7176d975_ea3b_29b5_89f4_4caf18a50e5d"
      unitRef="pure">0.922</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_TenTo15YearsMember"
      decimals="4"
      id="h_77_5372a74f_4aca_a909_7a08_60612fcf46b9"
      unitRef="pure">0.067</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037540Member_FifteenTo20YearsMember"
      decimals="4"
      id="h_78_f143a1c6_f03b_cde1_3b59_bb046ebc907c"
      unitRef="pure">0.001</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037540Member_MoreThan20YearsMember"
      decimals="4"
      id="h_79_df0ade2c_2cc1_1ef0_7592_a85077c4c513"
      unitRef="pure">0.010</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="D20240301_20240831_C000037540Member"
      id="t_22_99f93fcb_f81b_ef10_7b20_9f684c9a384f">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000037540Member"
      id="t_21_457b56e8_3692_0d4b_7044_1779ec39b2b0">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000037541Member"
      id="t_1_b318516b_4134_cf55_dae6_292c24a4c509">iShares Broad USD Investment Grade Corporate Bond ETF</oef:FundName>
    <oef:ClassName
      contextRef="D20240301_20240831_C000037541Member"
      id="t_2_fbe94c60_cde4_f80d_ce47_2ffeecc1b7ee">iShares Broad USD Investment Grade Corporate Bond ETF</oef:ClassName>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_3_e722940a_cd6d_4b25_0d62_94120160f093">USIG</dei:TradingSymbol>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_22_f0bd0e45_0233_4c27_0d30_cb50caff07db">NASDAQ</dei:SecurityExchangeName>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_4_899aa337_e3ac_d99e_33bc_434ce8218d86">This semi-annual shareholder report contains important information about iShares Broad USD Investment Grade Corporate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000037541Member"
      id="t_5_fe95d2d8_37c0_f931_a3b6_e2bfd9e55e79">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_6_d4273657_eec7_52ce_6787_5dbcf806482e">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000037541Member"
      id="t_7_ad30abb3_2cbe_ce1d_f21d_40405fd0daad">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000037541Member"
      id="t_8_0bbdac84_1db6_60f0_5361_a2ff55091512">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000037541Member"
      id="t_9_e61fb423_6001_3bce_47ad_8f38e7cc4915"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Broad USD Investment Grade Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.04&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; 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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000037541Member"
      decimals="INF"
      id="h_70_1607e05c_b604_493a_94cd_57c547d6b407"
      unitRef="USD">2</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000037541Member"
      decimals="4"
      id="h_71_4db91f07_d43d_47ae_81da_6ca6ed8896e5"
      unitRef="pure">0.0004</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000037541Member"
      id="t_10_612ff646_aff9_98d7_8fa8_b5652683a2f7">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.29&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.42&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.76&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.48&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.40&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.49&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.47&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;ICE BofA US Broad Market Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.35&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; 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&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; BofA&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; US Corporate Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.28&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;9.45&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;0.82&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.61&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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      contextRef="D20240301_20240831_ICEBofAUSBroadMarketIndexMember"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0485</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_81_fa3edfd5_26cc_47c8_9a85_13c189c5fddc"
      unitRef="pure">0.0735</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">-0.0008</oef:AvgAnnlRtrPct>
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      id="h_83_ed35cdc3_8ae9_480f_bbb6_be74fdb49cbe"
      unitRef="pure">0.0167</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_ICEBofAUSCorporateIndexMember"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0528</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0945</oef:AvgAnnlRtrPct>
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      id="h_86_a5813aa7_6bb6_4c72_bd4b_c143221d6779"
      unitRef="pure">0.0082</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
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      unitRef="pure">0.0261</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
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      id="t_11_58528749_c57e_8df2_49c1_5aa26e756512">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;11,917,283,806&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;10,366&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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      unitRef="USD">11917283806</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_89_543021e5_52f2_456e_b7b5_efd6cf267028"
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    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000037541Member"
      decimals="4"
      id="h_90_3f920d49_8626_454b_828b_7f1f889f72c6"
      unitRef="pure">0.06</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_20_a2ae38cb_3851_b87e_34f1_43d5151de5f2">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      id="t_21_192eb4f8_e5be_6c06_4f54_6d6a85ceb409">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>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_18_5bd18b6d_4205_edfb_4ab3_345d86446037">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000037541Member"
      id="t_23_6d9fde19_6f22_43ba_6575_a2aba4504e13"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;1.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;42.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;44.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;1.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt; &lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;38.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;28.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;6.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;6.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;19.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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
      contextRef="TI20240831_C000037541Member_MoodysAaaRatingMember"
      decimals="4"
      id="h_91_a7a9e3bd_1b72_4ee8_ab42_1a089a79c27c"
      unitRef="pure">0.019</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_AaMember"
      decimals="4"
      id="h_92_ab42fdd5_5d8d_4ea0_8495_11056cf56b15"
      unitRef="pure">0.077</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_AMember"
      decimals="4"
      id="h_93_3efc8465_69e5_4dd8_af22_ac722c98cce4"
      unitRef="pure">0.428</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_BaaMember"
      decimals="4"
      id="h_94_a916d3e9_f73f_4fd0_9289_2a30d1d98e9b"
      unitRef="pure">0.441</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_BaMember"
      decimals="4"
      id="h_95_1b5dd261_6518_4592_ac51_759eb3e15644"
      unitRef="pure">0.018</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_NotRatedMember"
      decimals="4"
      id="h_96_18108667_4602_4719_8314_5b3bf50b8ce4"
      unitRef="pure">0.017</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_OneTo5YearsMember"
      decimals="4"
      id="h_97_dcaabcf6_cbe2_9896_73d9_6f3cfcbb17f1"
      unitRef="pure">0.385</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_FiveTo10YearsMember"
      decimals="4"
      id="h_98_e3f6e168_37db_cf45_cc1f_1e60fed072a4"
      unitRef="pure">0.280</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037541Member_TenTo15YearsMember"
      decimals="4"
      id="h_99_815d828f_78ae_e302_a584_f34e0623f352"
      unitRef="pure">0.069</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037541Member_FifteenTo20YearsMember"
      decimals="4"
      id="h_100_bfe0f466_8338_d886_e830_720868d22dfb"
      unitRef="pure">0.068</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037541Member_MoreThan20YearsMember"
      decimals="4"
      id="h_101_baafa2a2_923d_7c99_9497_624f1771a599"
      unitRef="pure">0.198</oef:PctOfTotalInv>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_25_3d60014a_598e_9cdc_e5a2_399efeae1755">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000037541Member"
      id="t_24_1c996d21_d6e6_851b_df0f_d04fc48afbfc">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000080010Member"
      id="t_1_e0991125_5506_60a3_d65d_6be9a843359f">iShares Core 10+ Year USD Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000080010Member"
      id="t_2_9bec11b9_93e1_1f9d_49ed_94a255aa3ed1">iShares Core 10+ Year USD Bond ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000080010Member"
      id="t_3_6d6906f3_1a8f_2dca_f096_fa71904022a4">ILTB</dei:TradingSymbol>
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      contextRef="D20240301_20240831_C000080010Member"
      id="t_5_a6b1001a_92aa_5ad5_a55c_43a31db700d0">This semi-annual shareholder report contains important information about iShares Core 10+ Year USD Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000080010Member"
      id="t_4_6ec500dd_e5da_e163_3119_b8d0c2af9a09">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000080010Member"
      id="t_6_280a6002_a80d_d6ff_2a8d_43674dd45b17">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000080010Member"
      id="t_7_332f8bde_a876_8563_5c2e_055ff04690ad">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000080010Member"
      id="t_8_1d4c1ff3_6cb3_1742_66aa_b774fa018c7a">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000080010Member"
      id="t_9_4741fd04_20a1_90c1_8796_4c67294bb035"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Core 10+ Year USD Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.06&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; 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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000080010Member"
      decimals="INF"
      id="h_97_c2523722_75ef_41e9_9fd1_0bba90206aa7"
      unitRef="USD">3</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000080010Member"
      decimals="4"
      id="h_98_bf5389fe_fbbc_4f41_8253_5eff69cbe377"
      unitRef="pure">0.0006</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000080010Member"
      id="t_10_2be0da81_6699_eac0_6253_a61add0c2695">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.64&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.39&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(2.29&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.10&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.70&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(2.27&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.05&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg U.S. Universal 10+ Year Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;8.46&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(2.26&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
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    <oef:AvgAnnlRtrPct
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;604,160,747&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;3,665&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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      id="h_115_1d744d00_b699_4059_9611_35da3c07e743"
      unitRef="USD">604160747</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000080010Member"
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      id="h_116_8fe4c6eb_b777_494f_b1d0_0ac7a9f1de44"
      unitRef="Holding">3665</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000080010Member"
      decimals="4"
      id="h_117_9676f30a_ff5d_4166_b4c4_4a25f8109801"
      unitRef="pure">0.04</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000080010Member"
      id="t_12_4265b01e_810a_d255_3a29_5209067ac603">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="D20240301_20240831_C000080010Member"
      id="t_22_b0a028e4_6e9f_8674_3ef5_e94c230e4489"> 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="D20240301_20240831_C000080010Member"
      id="t_14_c79ed0b1_56c9_38cd_c22e_c12e81f085fe">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000080010Member"
      id="t_15_f60173dd_448f_5bbf_c8cb_6c8bf2e6ed3c"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;45.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;6.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;21.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;22.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;2.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;B&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-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;0.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Caa&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-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;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ca&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-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;0.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;0.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;47.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;43.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;7.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Municipal Debt Obligations&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-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;1.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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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      id="h_121_6015d671_5fa8_4c5c_8f8b_1b99ee0aee74"
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      id="t_5_cbc2c9cd_da7b_1514_19ce_f6ff217e9e92">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000174365Member"
      id="t_6_5728a7df_c067_d75c_589d_5326be77c7d6">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000174365Member"
      id="t_7_295feb9b_cbeb_ab14_5b10_e9aca638ed0f">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000174365Member"
      id="t_8_ed3f05a0_ab98_97ee_69f6_903fb5c11c49"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Core 5-10 Year USD Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.05&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000174365Member"
      decimals="INF"
      id="h_151_4a547242_6b25_7bbf_fbd2_2e596824fbaa"
      unitRef="USD">3</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000174365Member"
      decimals="4"
      id="h_152_a2da45c5_7e3e_510f_457a_359c806989e4"
      unitRef="pure">0.0005</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000174365Member"
      id="t_9_9cc13aeb_1c96_34d5_4a96_ad721aca42bc">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.62&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.31&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.23&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.42&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.32&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.21&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.44&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.59&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg U.S. Universal 5-10 Year Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.63&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;8.36&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;0.31&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;1.48&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="D20240301_20240831_C000174365Member"
      id="t_10_e95fcd4c_7d07_6bb9_15f9_d13eeeadc7da">Fund NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_C000174365Member"
      decimals="4"
      id="h_153_8ae0fc1c_36f3_30c8_0105_d25b264a622b"
      unitRef="pure">0.0562</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000174365Member"
      decimals="4"
      id="h_154_4352b813_d464_732d_e343_5849ff56b86b"
      unitRef="pure">0.0831</oef:AvgAnnlRtrPct>
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      id="h_155_895b46ba_1898_d327_655b_53f260baf09a"
      unitRef="pure">0.0023</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.0142</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
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      unitRef="pure">0.0585</oef:AvgAnnlRtrPct>
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      id="h_128_2e8ddede_b248_467a_b8fa_76e382c73080"
      unitRef="pure">0.0832</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_129_63bd0c7b_d3f2_45d6_8256_1b1324831a8a"
      unitRef="pure">0.0021</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20161101_20240831_C000174365Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_130_515ca4ab_bf84_44d6_8731_ba1e2146bacc"
      unitRef="pure">0.0144</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_BloombergUSUniversalIndexMember"
      id="t_12_7e2dbc19_eae5_c0a9_ff16_2b694bfffac0">Bloomberg U.S. Universal Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_131_ead7c288_5c99_45e1_9c6c_33560d26a3e2"
      unitRef="pure">0.0499</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_132_1436f34d_250a_48c6_bbdc_b828ac299c1b"
      unitRef="pure">0.0792</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_133_42034eff_22cf_4136_96e2_ee51c9dabc69"
      unitRef="pure">0.0034</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20161101_20240831_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_134_19d4f238_b7a8_403b_abdc_3b7ea88cf35b"
      unitRef="pure">0.0159</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_BloombergUSUniversal510YearIndexMember"
      id="t_13_bedb797e_67b3_c3ed_1265_71cd93b9a6d9">Bloomberg U.S. Universal 5-10 Year Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_BloombergUSUniversal510YearIndexMember"
      decimals="4"
      id="h_135_13270db4_b910_46cd_9d9d_48db95e30b75"
      unitRef="pure">0.0563</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSUniversal510YearIndexMember"
      decimals="4"
      id="h_136_02a6d86c_529c_440f_a62e_6043b8384dde"
      unitRef="pure">0.0836</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSUniversal510YearIndexMember"
      decimals="4"
      id="h_137_c954734c_81ad_4be0_8bf2_ec3c9c92b14b"
      unitRef="pure">0.0031</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20161101_20240831_BloombergUSUniversal510YearIndexMember"
      decimals="4"
      id="h_138_50e5fdb2_5cf9_4f81_bf2d_7beed89cb4bf"
      unitRef="pure">0.0148</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240301_20240831_C000174365Member"
      id="t_14_913d15a6_b77b_6718_86ad_71242d3991e7">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;224,430,610&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;2,836&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;126&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000174365Member"
      decimals="INF"
      id="h_139_81b743d6_d5b0_4e26_828d_c29980aa788e"
      unitRef="USD">224430610</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000174365Member"
      decimals="INF"
      id="h_140_780e3c7f_728d_4f0a_9e1a_b332b998ff7c"
      unitRef="Holding">2836</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000174365Member"
      decimals="4"
      id="h_141_a4c636e2_6014_499e_b048_34b31af48115"
      unitRef="pure">1.26</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="D20240301_20240831_C000174365Member"
      id="t_15_5728e0f3_234f_f0e8_6f32_c649cdf36cbc">2016-11-01</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000174365Member"
      id="t_16_20871060_f3b7_a180_4ef1_8cfe23ca59e0">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000174365Member"
      id="t_17_8ef91d77_2b7d_f9c3_6c61_a481054a0953">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="D20240301_20240831_C000174365Member"
      id="t_18_cd0ed0c9_df0c_ac54_d2ed_90dd22f6301c">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000174365Member"
      id="t_19_3d6fdec2_b881_c38a_ef09_fa058226e93c"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;62.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;11.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;8.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;10.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;2.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;B&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-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;2.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Caa&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-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;0.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ca&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-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;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;72.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;23.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;4.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Collateralized Mortgage Obligations&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-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;0.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Municipal Debt Obligations&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-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;0.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Common Stocks&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-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;0.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;TBA Sales Commitments&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-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;(0.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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&gt;)&lt;/span&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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Rounds to less than 0.1%.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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_142_4a5529f0_7b8c_4144_b688_81614d0a576c"
      unitRef="pure">0.629</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_AaMember"
      decimals="4"
      id="h_143_a7e08fff_ce6e_4196_b455_d089bdba22e8"
      unitRef="pure">0.116</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_AMember"
      decimals="4"
      id="h_144_b77a226a_9947_4c35_acac_ceb4dc013514"
      unitRef="pure">0.083</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_BaaMember"
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      id="h_145_c32bc8e8_60e9_4f00_9a55_afb53a005ccc"
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      contextRef="TI20240831_C000174365Member_BaMember"
      decimals="4"
      id="h_146_5ea2f047_bf0b_4c3a_adcd_d3509a97d424"
      unitRef="pure">0.027</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_BMember"
      decimals="4"
      id="h_147_32df4b3b_18f3_47b2_9819_b5564800580d"
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      contextRef="TI20240831_C000174365Member_CaaMember"
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      id="h_148_05bd82d8_231f_4291_a742_b997113ba4df"
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      contextRef="TI20240831_C000174365Member_MoodysCaRatingMember"
      decimals="4"
      id="h_149_a1e7ed78_8c6d_4aa2_ae3d_8200ec134c50"
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      contextRef="TI20240831_C000174365Member_NotRatedMember"
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      id="h_150_8e218952_b9ef_40e1_803a_3d0235381b8e"
      unitRef="pure">0.015</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_USGovernmentCorporationsAndAgenciesSecuritiesMember"
      decimals="4"
      id="h_157_03b26c0d_7814_22c6_7d1f_3e94b8743b47"
      unitRef="pure">0.725</oef:PctOfTotalInv>
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      id="h_158_27d5392c_b1f7_7778_fbbe_2e6de804cf1c"
      unitRef="pure">0.230</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_ForeignGovernmentObligationsMember"
      decimals="4"
      id="h_159_938794bd_79ba_8758_6da2_084a2552acd8"
      unitRef="pure">0.042</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_CollateralizedMortgageObligationsMember"
      decimals="4"
      id="h_160_8841f103_9133_6977_7630_432395ffcc71"
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      contextRef="TI20240831_C000174365Member_MunicipalDebtObligationsMember"
      decimals="4"
      id="h_161_2ff4be0a_02f9_aff4_ffa0_b677c3d648da"
      unitRef="pure">0.001</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_CommonStockMember"
      decimals="4"
      id="h_162_0964d25c_e262_bae3_30b5_c5ce71b1227c"
      unitRef="pure">0.000</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000174365Member_TBASalesCommitmentsMember"
      decimals="4"
      id="h_163_760db8d2_61d6_d22d_5845_3792cf0b6628"
      unitRef="pure">-0.005</oef:PctOfTotalInv>
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      contextRef="D20240301_20240831_C000174365Member"
      id="t_20_439336d3_24a2_baf7_6f07_7d8bd7d884c5">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000174365Member"
      id="t_21_24f4c8de_be6b_f0b0_2456_0ab8af6354cd">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000012092Member"
      id="t_1_6dd949fe_6949_50f3_019c_c70a6296ba94">iShares Core U.S. Aggregate Bond ETF</oef:FundName>
    <oef:ClassName
      contextRef="D20240301_20240831_C000012092Member"
      id="t_2_b8f5f5b6_fb7c_f9f2_f6c3_85d2cfec2c9f">iShares Core U.S. Aggregate Bond ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000012092Member"
      id="t_3_bb9f7efc_5be5_acfe_6d91_82ec8d29bf76">AGG</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240301_20240831_C000012092Member"
      id="t_5_2a2aa864_0516_a133_d65c_230d812bbbfb">This semi-annual shareholder report contains important information about iShares Core U.S. Aggregate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000012092Member"
      id="t_4_d507e81b_0042_3d8c_6a8c_6887264922aa">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000012092Member"
      id="t_6_7839a7a6_67eb_07c2_ce6c_8a79f5ba6f03">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000012092Member"
      id="t_7_9ba1ac27_2d5f_6ed2_6173_76c1018e657f">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000012092Member"
      id="t_8_7ee25f71_9877_9301_a165_60215f75c5da">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000012092Member"
      id="t_9_6f54ef72_9489_5144_1f18_7f725c5184e2"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Core U.S. Aggregate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.03&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000012092Member"
      decimals="INF"
      id="h_151_70b5229b_6921_4c42_9a95_485261d1f5f1"
      unitRef="USD">2</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000012092Member"
      decimals="4"
      id="h_152_0ca87116_b212_40b8_b898_fffd960c5fa7"
      unitRef="pure">0.0003</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000012092Member"
      id="t_10_37c52612_8eb8_23d1_6003_e1b094313068">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.29&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.07&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.60&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.88&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.29&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.07&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.60&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg U.S. Aggregate Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;7.30&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(0.04&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt;
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    <oef:AvgAnnlRtrPct
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;117,610,829,178&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;11,850&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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      id="h_169_0aaf87c9_adca_482d_b9a5_ce8e585e23fe"
      unitRef="USD">117610829178</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_170_8d2218ed_ae7a_40d2_8a15_12ba442b6fc9"
      unitRef="Holding">11850</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000012092Member"
      decimals="4"
      id="h_171_310bd311_80c8_41ee_aa8d_439e04985efb"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000012092Member"
      id="t_12_fba9a1a7_3326_233c_f428_32345e8a6d10">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="D20240301_20240831_C000012092Member"
      id="t_19_af0e3f18_c066_9822_abc3_6e68aefdbfd2">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="D20240301_20240831_C000012092Member"
      id="t_13_2c85c48f_a586_5952_9910_5f052a210b3e">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000012092Member"
      id="t_14_19557de8_3422_66c6_92a6_505a3f949d64"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;70.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;4.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;11.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;11.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;0.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;70.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;25.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;2.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Collateralized Mortgage Obligations&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-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;1.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Municipal Debt Obligations&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-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;0.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Asset-Backed Securities&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-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;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;TBA Sales Commitments&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-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;(0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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&gt;)&lt;/span&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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
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      id="t_9_05b1b397_7bca_81b8_3b27_b417c5a6c144"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares ESG Advanced Total USD Bond Market ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.12&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; 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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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    <oef:ExpenseRatioPct
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      unitRef="pure">0.0012</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_10_f65e9913_6298_a83e_b9f4_70ee435f96aa">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.91&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.65&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(1.02&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.06&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.13&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.95&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.76&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg MSCI US Universal Choice ESG Screened Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;7.76&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(0.89&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span&gt;)&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
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      id="t_11_9fcec3b2_51db_b456_c884_1f62a633b038">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;682,733,101&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;4,193&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000219898Member"
      decimals="INF"
      id="h_192_39114836_e6d2_423a_9579_2a5619dd2e52"
      unitRef="USD">682733101</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000219898Member"
      decimals="INF"
      id="h_193_c5730ae7_a5e6_476f_bc8e_1a4bec49b10e"
      unitRef="Holding">4193</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000219898Member"
      decimals="4"
      id="h_194_ac39e47e_a07b_4c70_8383_424ec20766ad"
      unitRef="pure">0.46</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="D20240301_20240831_C000219898Member"
      id="t_16_aeefcd9c_ab17_58a7_ea7c_ca45f3d07e7e">2020-06-23</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000219898Member"
      id="t_12_b6f3e4e5_3117_3691_f2d7_990b58f4a228">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000219898Member"
      id="t_22_15312d47_1b28_fc90_8cbd_6eb842591812">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="D20240301_20240831_C000219898Member"
      id="t_14_7b630280_480c_d96f_a862_ec9604b1f5b3">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000219898Member"
      id="t_15_c6b8b55b_3b1d_2d4e_9ba2_8052bd457b51"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;61.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;5.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;10.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;14.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;3.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;B&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-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;1.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Caa&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-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;0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ca&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-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;0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;61.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;31.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;6.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Collateralized Mortgage Obligations&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-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;0.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Asset-Backed Securities&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-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;0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;TBA Sales Commitments&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-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;(0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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&gt;)&lt;/span&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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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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      contextRef="TI20240831_C000219898Member_USGovernmentCorporationsAndAgenciesSecuritiesMember"
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      contextRef="TI20240831_C000219898Member_CollateralizedMortgageObligationsMember"
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      id="h_208_c9f186aa_b2b8_28ef_8264_d4810fcde8b0"
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      id="h_209_2428d830_4a6b_d4b1_0def_fe53ac1064f7"
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      contextRef="D20240301_20240831_C000219898Member"
      id="t_21_d54e0af0_73e3_51f0_7551_2a80671789ac">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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    <oef:FundName
      contextRef="D20240301_20240831_C000189864Member"
      id="t_1_9b1394f7_b29e_382a_8ff8_64650bf93572">iShares ESG Aware 1-5 Year USD Corporate Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000189864Member"
      id="t_2_3a742a55_f6de_7366_06a8_980d6f08b7ea">iShares ESG Aware 1-5 Year USD Corporate Bond ETF</oef:ClassName>
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      contextRef="D20240301_20240831_C000189864Member"
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      contextRef="D20240301_20240831_C000189864Member"
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      contextRef="D20240301_20240831_C000189864Member"
      id="t_6_9b67653c_f6c3_b7bf_825b_547155e16499">This semi-annual shareholder report contains important information about iShares ESG Aware 1-5 Year USD Corporate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000189864Member"
      id="t_5_998e351e_d81c_6081_dce0_d746acb9ad9b">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000189864Member"
      id="t_7_0cd966de_24db_eead_dd02_73c375ba168f">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000189864Member"
      id="t_8_141dedd6_7781_264d_49e3_3a1313904fef">blackrock.com/fundreports</oef:AddlInfoWebsite>
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      contextRef="D20240301_20240831_C000189864Member"
      id="t_9_fe223c5d_7cea_1485_f315_3a80e6e20c74">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
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      contextRef="D20240301_20240831_C000189864Member"
      id="t_10_7945a000_a7c8_15e9_43cc_40413260d9bc"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares ESG Aware 1-5 Year USD Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.12&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
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      id="h_226_bcb5aa0b_f792_0a00_21c3_ac54267ddd29"
      unitRef="pure">0.0012</oef:ExpenseRatioPct>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.32&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.86&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.85&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.30&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.37&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.81&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.30&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg MSCI US Corporate 1-5 Year ESG Focus Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;8.02&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.08&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;890,017,381&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;1,515&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000189864Member"
      decimals="INF"
      id="h_216_6a54f7d9_155a_483c_b879_00f047b19e88"
      unitRef="USD">890017381</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000189864Member"
      decimals="INF"
      id="h_217_9921a129_6fe6_4a4e_865c_d1592b8c2de3"
      unitRef="Holding">1515</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000189864Member"
      decimals="4"
      id="h_218_b152e185_54fa_4a47_8ad1_8530f4c043b6"
      unitRef="pure">0.23</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="D20240301_20240831_C000189864Member"
      id="t_21_593a4b81_d187_be24_f7a2_ea3c1fab7c90">2017-07-11</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000189864Member"
      id="t_13_64695fa7_4cba_18e1_577a_9166692ae84c">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000189864Member"
      id="t_16_e58dcfef_8a5f_dde0_6684_bbd25fd2a0de">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="D20240301_20240831_C000189864Member"
      id="t_14_fe8670f3_637a_0232_ca3c_eaa9249400aa">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000189864Member"
      id="t_15_7a35329d_7675_133b_648b_6edc7a799779"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;46.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;45.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;1.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt;Investments&#160;&lt;/em&gt;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-2 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;23.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;2-3 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;23.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;3-4 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;27.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;4-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;21.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-6 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;7-8 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;9-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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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      contextRef="D20240301_20240831_C000189864Member"
      id="t_22_5749a4dc_cde6_dd1b_a150_73c9f192ac6f">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      id="t_1_85ad2d7f_5398_3a4f_abf7_b4cba8cd7e83">iShares ESG Aware U.S. Aggregate Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000201167Member"
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      contextRef="D20240301_20240831_C000201167Member"
      id="t_4_15d60c61_4ac1_890e_a6c6_66638da3d4d7">This semi-annual shareholder report contains important information about iShares ESG Aware U.S. Aggregate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      id="t_6_43af4780_d72e_d2a5_21bf_b305736d11fe">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
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      contextRef="D20240301_20240831_C000201167Member"
      id="t_7_eee85128_6494_fe9f_0912_e7d0af43bfe7">blackrock.com/fundreports</oef:AddlInfoWebsite>
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      id="t_8_cbe41a16_cb50_30f6_bf53_e4203cd1e5f1">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
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      contextRef="D20240301_20240831_C000201167Member"
      id="t_9_2201654a_60dc_028c_6bbe_9a23bf95242b"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares ESG Aware U.S. Aggregate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.10&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
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      id="h_226_b92e05d8_1570_47ea_9111_4bb2683cafcd"
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.77&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.16&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.15&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.78&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;
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&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.74&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.13&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.79&lt;/td&gt;
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&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.14&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg MSCI US Aggregate ESG Focus Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;7.29&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(0.01&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;1.90&lt;/td&gt;
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,523,083,745&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;5,065&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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      unitRef="Holding">5065</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000201167Member"
      decimals="4"
      id="h_245_7d81d727_2ca7_44cf_aa66_7ecbfa1d6979"
      unitRef="pure">0.61</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="D20240301_20240831_C000201167Member"
      id="t_20_ccaa7b29_b009_60e4_e00a_32441239f8d0">2018-10-18</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000201167Member"
      id="t_12_9942cba4_2278_ea47_930f_d62463fbd87f">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000201167Member"
      id="t_14_fd5fd935_15f3_ba90_8981_c90c63a58c16">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="D20240301_20240831_C000201167Member"
      id="t_13_0a01d053_e58c_9436_4de4_dbe5df8b9060">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000201167Member"
      id="t_15_700ece2a_c8d1_265f_2429_a1eb991aa98b"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;70.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;4.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;10.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;12.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;2.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;70.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;25.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Collateralized Mortgage Obligations&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-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;1.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Asset-Backed Securities&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-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;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Municipal Debt Obligations&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-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;0.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;TBA Sales Commitments&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-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;(0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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&gt;)&lt;/span&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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
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&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(b)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
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      id="h_258_c0b597e9_83fa_4fda_6ff8_a80e1c1d5bc3"
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      contextRef="D20240301_20240831_C000201167Member"
      id="t_22_a537fc4a_f70c_2bdd_013e_220955013dea">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      id="t_7_d9320bd4_1366_81ef_db01_f4a105849bb0">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
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      id="t_24_0fc12040_ab96_34a7_abb9_2415d3850219">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
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      id="t_10_53f327a7_ca60_01c7_66de_6b05b9e2ae17"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares ESG Aware USD Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.18&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.13&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.50&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.15&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.11&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.02&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.47&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.16&lt;/td&gt;
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&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg MSCI US Corporate ESG Focus Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.22&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;9.30&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; 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: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.43&lt;/td&gt;
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;1,140,463,460&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;4,066&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000189865Member"
      id="t_16_989515c0_fb4a_b32a_f5e2_1788fa63062c"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;1.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;43.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;47.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;1.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;0.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&#160;&lt;/em&gt;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;35.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;28.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;8.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;5.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;22.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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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      decimals="4"
      id="h_273_ae0a0797_ff27_4016_8038_6194adfbd25e"
      unitRef="pure">0.017</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_AaMember"
      decimals="4"
      id="h_274_3c5e65e6_44f7_415e_8cdc_b1132603a5de"
      unitRef="pure">0.053</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_AMember"
      decimals="4"
      id="h_275_962d555c_b9ba_420e_9b42_5e513c76c86b"
      unitRef="pure">0.432</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_BaaMember"
      decimals="4"
      id="h_276_e8899fdc_961f_416f_b75e_edd8b092238b"
      unitRef="pure">0.472</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_BaMember"
      decimals="4"
      id="h_277_c1589c70_1f12_45e7_a1ba_3bca7017bb3e"
      unitRef="pure">0.017</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_NotRatedMember"
      decimals="4"
      id="h_278_c63e5a71_14f2_4482_9a48_5bf588a4cc51"
      unitRef="pure">0.009</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_OneTo5YearsMember"
      decimals="4"
      id="h_279_35f47149_f101_ef57_282e_615ae230da9c"
      unitRef="pure">0.355</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_FiveTo10YearsMember"
      decimals="4"
      id="h_280_a9064d84_0986_161f_5706_8b855dfdac75"
      unitRef="pure">0.282</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_TenTo15YearsMember"
      decimals="4"
      id="h_281_40f3b188_9af9_1927_e8ea_2c77a50b2046"
      unitRef="pure">0.082</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_FifteenTo20YearsMember"
      decimals="4"
      id="h_282_fd6bd8e0_460a_9bfb_6362_58c48188dd31"
      unitRef="pure">0.059</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000189865Member_MoreThan20YearsMember"
      decimals="4"
      id="h_283_634a4d92_ca7c_efd1_ede6_35ec14c58bd2"
      unitRef="pure">0.222</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="D20240301_20240831_C000189865Member"
      id="t_23_1e52eda9_7144_364c_a452_9648eb76e7a0">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
    <oef:CreditRatingsSelectionTextBlock
      contextRef="D20240301_20240831_C000189865Member"
      id="t_22_6cd0c442_e9fa_daa8_ac84_7166016c6346">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000037543Member"
      id="t_1_a2ce64a9_d3b2_c229_e0a5_c2f864e32297">iShares Government/Credit Bond ETF</oef:FundName>
    <oef:ClassName
      contextRef="D20240301_20240831_C000037543Member"
      id="t_3_071f8fee_0380_b951_9cf3_3f606654e615">iShares Government/Credit Bond ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000037543Member"
      id="t_2_01dd31a1_7213_b43d_a08a_4a18d5110027">GBF</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_6_12a93912_b68c_cf9c_9f57_fecfc8fd91e8">This semi-annual shareholder report contains important information about iShares Government/Credit Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000037543Member"
      id="t_5_51caeab0_2c21_741f_b135_970013438520">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_9_972bcd97_83fb_b24f_0564_0c657ca4231f">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000037543Member"
      id="t_7_d18f34d2_d68c_6ec9_b666_ac1eeec3904d">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000037543Member"
      id="t_8_4416dd93_da56_018b_0d4f_cfa9e4a3cb71">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_10_2e9da133_e4cc_ab0b_b8ec_aeada61eb21b"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Government/Credit Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;10&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.20&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000037543Member"
      decimals="INF"
      id="h_279_ab44d6fc_74e6_4c49_a486_4990763b46fe"
      unitRef="USD">10</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000037543Member"
      decimals="4"
      id="h_280_88d68009_c4b8_434b_a058_85f7c1a411b1"
      unitRef="pure">0.0020</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_11_16795b22_663d_da58_ad73_af1e9cc55016">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.49&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.96&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.25&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.56&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.58&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.98&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.25&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.55&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg U.S. Government/Credit Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.61&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;7.21&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(0.02&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;1.76&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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      id="h_288_0999af31_38b7_4803_8a19_c551e5e13506"
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      contextRef="D20240301_20240831_BloombergUSUniversalIndexMember"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0499</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_290_7985d565_87bc_4abf_854b_8232dbce08fe"
      unitRef="pure">0.0792</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSUniversalIndexMember"
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      id="h_291_57f324a7_6f03_4fce_a62d_4cddce1d2066"
      unitRef="pure">0.0034</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_292_05649329_50d9_46e9_887a_41fcecdce9e5"
      unitRef="pure">0.0193</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_BloombergUSGovernmentCreditBondIndexMember"
      id="t_21_578afc75_5747_f74b_3590_b5b173e59ed6">Bloomberg U.S. Government/Credit Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_BloombergUSGovernmentCreditBondIndexMember"
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      id="h_293_a7f8d2cf_817d_4ec6_9ac4_a3022c508876"
      unitRef="pure">0.0461</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_294_2ea3df79_7e39_43f2_9a68_8f4ff2192bd4"
      unitRef="pure">0.0721</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSGovernmentCreditBondIndexMember"
      decimals="4"
      id="h_295_543670a7_7023_44be_9d8f_07c04aa9f921"
      unitRef="pure">-0.0002</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSGovernmentCreditBondIndexMember"
      decimals="4"
      id="h_296_d5de31a4_3d1f_441d_8bff_bf2606ea2774"
      unitRef="pure">0.0176</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_12_df754ba5_a47e_08f0_f110_788e66beec7c">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;221,940,158&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;4,052&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000037543Member"
      decimals="INF"
      id="h_297_5e7a5d66_a6a1_4c6b_8c7b_748eaefcffa9"
      unitRef="USD">221940158</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000037543Member"
      decimals="INF"
      id="h_298_485afb31_d827_4e11_abb8_ec1e5accb28d"
      unitRef="Holding">4052</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000037543Member"
      decimals="4"
      id="h_299_739dbdff_a0e1_4b1b_910a_d48bb02407e0"
      unitRef="pure">0.08</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000037543Member"
      id="t_15_4a955c4b_1728_1d17_73a9_c8dc54c3faaa">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_22_87368f63_d0bb_7573_b0f6_fcfb9b4d0fc3">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="D20240301_20240831_C000037543Member"
      id="t_17_97544e9b_df8d_84a4_66d9_0db8a6fc0239">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_18_9572d376_f760_3e73_e49b_29973917ff86"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;62.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;2.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;15.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;17.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;0.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;60.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;35.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;3.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Municipal Debt Obligations&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-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;0.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="font-size: smaller; line-height: 0px;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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_300_bc04914d_b1cf_47cb_8ba4_5daa18b9a8cf"
      unitRef="pure">0.629</oef:PctOfTotalInv>
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      id="h_301_aaf18ec9_617d_4cdd_bf52_4653cb4cbc34"
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      decimals="4"
      id="h_302_fe0a1bbb_8e51_42b5_94a4_6b2838369dce"
      unitRef="pure">0.156</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037543Member_BaaMember"
      decimals="4"
      id="h_303_405d3d80_5fc0_429a_8b08_9645829b6dcd"
      unitRef="pure">0.174</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037543Member_BaMember"
      decimals="4"
      id="h_304_a1809721_009a_4fdd_a833_8c360e9c294d"
      unitRef="pure">0.008</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037543Member_NotRatedMember"
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      id="h_305_8ef045a5_b4b9_42c4_bb44_a4c4db5b39bb"
      unitRef="pure">0.004</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037543Member_USGovernmentCorporationsAndAgenciesSecuritiesMember"
      decimals="4"
      id="h_306_304bbe49_d482_8a66_401c_cc4d13d21682"
      unitRef="pure">0.607</oef:PctOfTotalInv>
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      id="h_307_25cb37c9_e8d4_a110_2233_e08803960cff"
      unitRef="pure">0.352</oef:PctOfTotalInv>
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      id="h_308_101faf79_1d53_0f10_0ec5_7290ae4209b4"
      unitRef="pure">0.033</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037543Member_MunicipalDebtObligationsMember"
      decimals="4"
      id="h_309_aabf8114_976d_3e4d_aea0_1d6a45e01b98"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="D20240301_20240831_C000037543Member"
      id="t_23_d39f3d58_3633_7540_7570_0889cc848992">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000037543Member"
      id="t_24_149b1a58_466d_deb5_c3a5_1c07eda19da8">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000182992Member"
      id="t_2_54c3bc21_632c_ee92_9779_8540fa7eafe8">iShares High Yield Systematic Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000182992Member"
      id="t_4_fffff9ed_c7ca_005f_07fe_3f735bd9b10f">This semi-annual shareholder report contains important information about iShares High Yield Systematic Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000182992Member"
      id="t_5_77abe738_5709_6a9e_54cb_f39c08493d15">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000182992Member"
      id="t_6_cfbdee5b_486d_ebd8_9cfa_3b80e49a64af">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000182992Member"
      id="t_7_7599d1e8_a052_f4f0_3824_e9c722202b20">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000182992Member"
      id="t_8_6078a630_2c87_29c7_ce29_319c2f35a2f2">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
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      contextRef="D20240301_20240831_C000182992Member"
      id="t_9_45b2dfc8_9fb1_cbc6_ecf0_8761de04970e"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares High Yield Systematic Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.35&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000182992Member"
      decimals="INF"
      id="h_306_077351a0_00d7_4a86_9b9c_9d961f78ad1b"
      unitRef="USD">18</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000182992Member"
      decimals="4"
      id="h_307_510339b4_e12b_472f_aa62_f42cdf3f12a5"
      unitRef="pure">0.0035</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000182992Member"
      id="t_10_997f4344_dc73_b76d_d6af_215adbc400da">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.69&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;13.97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.14&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.42&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;13.83&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.03&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.42&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;BlackRock High Yield Systematic Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.89&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;14.68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.64&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.79&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Markit iBoxx USD Liquid High Yield Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;6.03&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;12.32&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;3.79&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.26&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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
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    <oef:AvgAnnlRtrPct
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      id="h_308_004ab90e_c258_4b01_98e9_aa4e2dfe1517"
      unitRef="pure">0.0669</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000182992Member"
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      id="h_309_736d3ef0_5710_4bd0_a412_f594c6e0652b"
      unitRef="pure">0.1397</oef:AvgAnnlRtrPct>
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      id="h_310_5e6c02a5_b8b4_4573_9141_28fba18f588f"
      unitRef="pure">0.0514</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_311_aa63bbf3_34da_4164_b9b2_5126f87361c6"
      unitRef="pure">0.0542</oef:AvgAnnlRtrPct>
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      id="h_312_7cc1486d_3522_42b2_84f4_bc3291ed42f2"
      unitRef="pure">0.0667</oef:AvgAnnlRtrPct>
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      contextRef="FY2024_C000182992Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_313_39fea6b1_5632_4373_b11d_5c943ec98bb4"
      unitRef="pure">0.1383</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000182992Member_WithoutSalesLoadMember"
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      id="h_314_af9b839f_24e4_4fd8_8dbb_0b72f39ffa5b"
      unitRef="pure">0.0503</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;660,015,666&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;265&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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      unitRef="USD">660015666</us-gaap:AssetsNet>
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    <us-gaap:InvestmentCompanyPortfolioTurnover
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      decimals="4"
      id="h_330_1ec9642f_43a5_417c_89f2_57992594c375"
      unitRef="pure">0.34</us-gaap:InvestmentCompanyPortfolioTurnover>
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      id="t_12_e87e1065_4118_614f_3de5_4d29963f4c02">2017-07-11</oef:PerfInceptionDate>
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      contextRef="D20240301_20240831_C000182992Member"
      id="t_15_36cc623c_dc91_e0ae_95ec_5a5d25fbc10c">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      id="t_16_fe8f45f9_7c6a_bdd5_ee6d_c26c22dcaf6f">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>
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      contextRef="D20240301_20240831_C000182992Member"
      id="t_13_5c59cce6_e2fc_dd64_9468_f09a5f5cd755">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000182992Member"
      id="t_14_5f9ce437_6427_2443_832c_e7f17ba906e4"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;1.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;38.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;B&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-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;49.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Caa&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-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;6.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ca&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-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;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;5.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt; &lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;60.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;35.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;1.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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
      contextRef="TI20240831_C000182992Member_BaaMember"
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      id="h_331_247be1b2_3266_407f_b774_9d7c342a48e6"
      unitRef="pure">0.013</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_BaMember"
      decimals="4"
      id="h_332_ae548b90_72f2_4c32_95c5_622616ef0fa3"
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      id="h_333_46ed0679_7122_4996_a694_8a37ffbc77d0"
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      contextRef="TI20240831_C000182992Member_CaaMember"
      decimals="4"
      id="h_334_7be02460_337d_481a_b5bd_7a5485452325"
      unitRef="pure">0.060</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_MoodysCaRatingMember"
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      id="h_335_825e8112_8471_4dfc_8bcc_ccfc2f3cc558"
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      contextRef="TI20240831_C000182992Member_NotRatedMember"
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      id="h_336_d99dfe87_3155_4ffa_86fa_63f5da6c3ff8"
      unitRef="pure">0.052</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_OneTo5YearsMember"
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      id="h_337_1267ddbd_8ad4_5f89_9375_3c4c9700624b"
      unitRef="pure">0.608</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_FiveTo10YearsMember"
      decimals="4"
      id="h_338_7eaf752a_4e4f_6a58_0711_88a71264e12c"
      unitRef="pure">0.353</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_TenTo15YearsMember"
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      id="h_339_62f51326_d9bd_e9bf_ae28_032fd9f82a41"
      unitRef="pure">0.011</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_FifteenTo20YearsMember"
      decimals="4"
      id="h_340_0b26f061_bef3_75fd_f8a2_f7eae0d369d7"
      unitRef="pure">0.014</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182992Member_MoreThan20YearsMember"
      decimals="4"
      id="h_341_a5aed9f5_1e8f_c89a_9b58_0a3fd99a7cc8"
      unitRef="pure">0.014</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="D20240301_20240831_C000182992Member"
      id="t_23_124be3de_d2d3_558b_9081_bb2e35d16d18">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000182992Member"
      id="t_22_3603f0ca_da59_411d_dda8_8f32368741d7">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000046846Member"
      id="t_1_1d5dbb98_866c_c128_5d16_dde23086db5e">iShares iBoxx $ High Yield Corporate Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000046846Member"
      id="t_2_01d10122_935c_cf8c_34b2_5f04e616d3d5">iShares iBoxx $ High Yield Corporate Bond ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000046846Member"
      id="t_3_503d596e_4efa_e3ca_028e_fdf67be52984">HYG</dei:TradingSymbol>
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      contextRef="D20240301_20240831_C000046846Member"
      id="t_5_ead54d47_28b3_b4e3_26dc_e800dca527ae">This semi-annual shareholder report contains important information about iShares iBoxx $ High Yield Corporate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000046846Member"
      id="t_4_bc367299_e307_0197_94a9_e1b681c2b16d">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000046846Member"
      id="t_8_619e7ec8_fe15_4508_e045_356181ba939a">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000046846Member"
      id="t_6_2b2383fe_d02c_9132_6d14_227e070dbdb8">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000046846Member"
      id="t_7_c103f94d_1aae_28e2_c11e_4a40c7eb63f3">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000046846Member"
      id="t_9_ab34197f_7a46_c79c_dc87_c37275df958d"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares iBoxx $ High Yield Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;25&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.49&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      decimals="INF"
      id="h_337_a19e56a3_4891_4ffb_b0cc_299fdef00d86"
      unitRef="USD">25</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      decimals="4"
      id="h_338_9d74a4eb_6f12_4f94_be61_66bd889dbd50"
      unitRef="pure">0.0049</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000046846Member"
      id="t_10_d31070f2_eb1c_02c0_5080_13b403df8d4a">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.88&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;12.01&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.32&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.58&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.84&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;11.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.32&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.57&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Markit iBoxx&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; USD Liquid High Yield Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;6.01&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;12.30&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;3.79&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.10&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;16,784,630,165&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;1,251&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000046846Member"
      decimals="INF"
      id="h_355_63cd9f6d_0598_4c30_82a3_d16790362a3c"
      unitRef="USD">16784630165</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000046846Member"
      decimals="INF"
      id="h_356_16cae902_7a1e_45c2_a3e3_14df7deae186"
      unitRef="Holding">1251</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000046846Member"
      decimals="4"
      id="h_357_885acf38_ba27_48fa_906a_951892d02303"
      unitRef="pure">0.07</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000046846Member"
      id="t_12_2cbf3453_8167_b93e_6b6d_9dd40fae4812">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000046846Member"
      id="t_13_c01fce09_13f8_672c_68cc_5425a4380d02">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="D20240301_20240831_C000046846Member"
      id="t_14_c4eeb39c_e452_8f33_3301_e36b0f4c0249">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000046846Member"
      id="t_16_d3702b31_5437_631e_2836_6a7f9dc72c55"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;1.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;41.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;B&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-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;42.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Caa&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-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;11.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ca&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-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;1.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt; &lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;0-1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;57.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;40.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;1.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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
      contextRef="TI20240831_C000046846Member_BaaMember"
      decimals="4"
      id="h_358_3f46ef83_0706_438e_a98f_105747bdcdb2"
      unitRef="pure">0.015</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_BaMember"
      decimals="4"
      id="h_359_4f2e9886_9730_4dd2_8c89_7ebe0e0b53f1"
      unitRef="pure">0.417</oef:PctOfTotalInv>
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      id="h_360_8136fa85_7757_47d9_9db5_57adfaa38fd1"
      unitRef="pure">0.424</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_CaaMember"
      decimals="4"
      id="h_361_d5b4a667_8a42_4fb4_a18c_9544fdb4969d"
      unitRef="pure">0.115</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_MoodysCaRatingMember"
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      id="h_362_b50f46fa_4612_4149_9d9a_5846b6c8eff7"
      unitRef="pure">0.015</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_NotRatedMember"
      decimals="4"
      id="h_363_b69fe1c8_30ef_488c_90fd_1a51b602e15f"
      unitRef="pure">0.014</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_ZeroTo1YearMember"
      decimals="4"
      id="h_365_2fee3b01_f08e_f659_9729_f234f4e5f71a"
      unitRef="pure">0.002</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_OneTo5YearsMember"
      decimals="4"
      id="h_366_c6c01eb1_a070_0cf3_5f3e_e746090cc6bb"
      unitRef="pure">0.575</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_FiveTo10YearsMember"
      decimals="4"
      id="h_367_4c1ce53f_b425_9783_001d_a07353b9d62d"
      unitRef="pure">0.402</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000046846Member_TenTo15YearsMember"
      decimals="4"
      id="h_368_61ff1a53_47a7_32e2_82ac_bed64332edc1"
      unitRef="pure">0.003</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000046846Member_MoreThan20YearsMember"
      decimals="4"
      id="h_364_c4c5e0e2_1ad6_4670_8615_f90cdbaa2826"
      unitRef="pure">0.018</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="D20240301_20240831_C000046846Member"
      id="t_22_6d41a6f5_866b_415f_0eb9_97fb4555c4f1">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000046846Member"
      id="t_21_7009f306_e392_71fa_aa33_01a48be42e7f">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000012091Member"
      id="t_1_41672d25_96a0_7c35_8eaa_0854f094e030">iShares iBoxx $ Investment Grade Corporate Bond ETF</oef:FundName>
    <oef:ClassName
      contextRef="D20240301_20240831_C000012091Member"
      id="t_2_72cc0ba1_cded_acd1_99a3_1a484485a403">iShares iBoxx $ Investment Grade Corporate Bond ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000012091Member"
      id="t_3_05c135e2_c67a_4cbe_1acd_342104b0bcca">LQD</dei:TradingSymbol>
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      contextRef="D20240301_20240831_C000012091Member"
      id="t_5_6df76044_4364_5985_5d91_2e56d92e243c">This semi-annual shareholder report contains important information about iShares iBoxx $ Investment Grade Corporate Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000012091Member"
      id="t_4_8c271194_a9bc_6720_c583_1b6c28056814">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000012091Member"
      id="t_6_60fbeb99_f6d9_2463_0a46_185346a49a94">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000012091Member"
      id="t_7_d1575d89_96ba_b86b_4ced_e96b73f582dd">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000012091Member"
      id="t_8_707e9385_04e8_1551_e66b_9c51a1b86623">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000012091Member"
      id="t_9_9969cb64_a8a9_4b9a_30ec_1b4235ea06a2"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares iBoxx $ Investment Grade Corporate Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&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; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.14&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000012091Member"
      decimals="INF"
      id="h_365_439d6fea_5ceb_4d30_aad4_e7422c3ff253"
      unitRef="USD">7</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000012091Member"
      decimals="4"
      id="h_366_bc6fefcf_b796_43cd_8e15_cd933b62c583"
      unitRef="pure">0.0014</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000012091Member"
      id="t_10_4bf8311c_b0f3_3102_df44_c7303cd801b0">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.48&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.40&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.30&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.52&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.62&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.49&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.32&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.53&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Markit iBoxx&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; USD Liquid Investment Grade Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.59&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;9.61&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;0.43&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.70&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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      unitRef="pure">0.0043</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_MarkitIBoxxUSDLiquidInvestmentGradeIndexMember"
      decimals="4"
      id="h_382_f903ed6d_aac9_494d_9274_e29b6ef629dc"
      unitRef="pure">0.0270</oef:AvgAnnlRtrPct>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;32,712,080,192&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;2,772&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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    <oef:HoldingsCount
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      id="h_384_e60b5db3_0c92_497c_acbb_5713a3882ef0"
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    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000012091Member"
      decimals="4"
      id="h_385_78cb5b8c_50eb_4ff3_99ae_d0f0e3beb937"
      unitRef="pure">0.09</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="D20240301_20240831_C000012091Member"
      id="t_12_df31a248_abf7_84d5_e784_c470130f547a">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="D20240301_20240831_C000012091Member"
      id="t_13_b410a133_6ade_0380_061a_951aa9b959b4"> 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="D20240301_20240831_C000012091Member"
      id="t_14_87c894ce_a706_074c_385b_4351417ef9e6">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000012091Member"
      id="t_15_9f15ccc5_5abf_f195_ff12_80d1ffd18ac1"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;2.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;46.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;42.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;2.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;0.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt; (a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;16.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;38.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;8.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;8.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;28.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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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      unitRef="pure">0.025</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000012091Member_AaMember"
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      id="h_387_2fe5d298_d16f_4301_a6c8_ad51860671a9"
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      contextRef="TI20240831_C000012091Member_AMember"
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      id="h_388_0fc5699f_ab5e_4f7b_82b1_bd8ba981ec10"
      unitRef="pure">0.469</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000012091Member_BaaMember"
      decimals="4"
      id="h_389_dc52acca_c91d_49e0_991a_4b983617dbd5"
      unitRef="pure">0.421</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000012091Member_BaMember"
      decimals="4"
      id="h_390_d3df4591_805a_4408_b92d_96ee339a7d94"
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      contextRef="TI20240831_C000012091Member_NotRatedMember"
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      id="h_391_ee5611b3_f304_4c85_bf4b_0090e82c6375"
      unitRef="pure">0.003</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000012091Member_OneTo5YearsMember"
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      id="h_392_c5b139ee_4cdf_c99e_123c_519ac4bb3330"
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      contextRef="TI20240831_C000012091Member_FiveTo10YearsMember"
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      id="h_393_d2e399f1_3fcb_ac29_40ef_4565a3739233"
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      id="h_394_6970280d_f40a_7f44_eec4_4c67a73690b9"
      unitRef="pure">0.085</oef:PctOfTotalInv>
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      id="h_395_94167b55_c926_8fe3_4d8a_7635da11113d"
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      id="h_396_690b29d2_729a_9c0d_f1b7_296485c53946"
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      contextRef="D20240301_20240831_C000012091Member"
      id="t_21_fb15a2f8_ee4b_a68e_8b43_af9e1582d131">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000012091Member"
      id="t_20_59d7456e_8c97_e283_3319_08e68c610017">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000037542Member"
      id="t_1_4a1dbf24_b0cc_f711_217f_f55518a22e08">iShares Intermediate Government/Credit Bond ETF</oef:FundName>
    <oef:ClassName
      contextRef="D20240301_20240831_C000037542Member"
      id="t_2_4885f463_72bc_dd11_4280_af7e3474fb3d">iShares Intermediate Government/Credit Bond ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000037542Member"
      id="t_3_090e2e52_e3a2_a2d9_686e_fef554bb3d46">GVI</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_4_3b53450c_940b_2cd2_4674_fa22dae65dfb">This semi-annual shareholder report contains important information about iShares Intermediate Government/Credit Bond ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000037542Member"
      id="t_5_07c31e26_8b4e_15c1_9943_4035ecb7a38e">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_6_044edc98_c737_543c_68fb_69eb2b61c0ca">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000037542Member"
      id="t_7_e6205dfb_75a2_fd74_c24f_25f85f7a4d34">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000037542Member"
      id="t_8_eeb6e901_3cb7_d462_891d_6a432963de1f">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_9_5b0a532d_0e0e_a89a_d967_34551134ea0c"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Intermediate Government/Credit Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;10&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.20&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; 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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000037542Member"
      decimals="INF"
      id="h_392_65ac1f0c_b976_4dda_a171_dae210f379f0"
      unitRef="USD">10</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000037542Member"
      decimals="4"
      id="h_393_b4bc09af_4615_47f0_af7a_db493a529f95"
      unitRef="pure">0.0020</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_10_e1903c62_0696_da11_648a_5626c4683851">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.27&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.90&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; 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: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.62&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.28&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;6.84&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.78&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.62&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg U.S. Intermediate Government/Credit Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.37&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;7.11&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;0.96&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;1.80&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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      id="t_16_321139f5_4f4d_e1da_0355_304e64f29ad5">Fund NAV</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0427</oef:AvgAnnlRtrPct>
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      id="h_395_2d5419e5_b391_4659_a59a_80b5ae9faea0"
      unitRef="pure">0.0690</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_396_22bff200_6a21_463d_8e18_af27c541cb4b"
      unitRef="pure">0.0079</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_397_65b8032a_cff9_4b67_b154_e57c711e6776"
      unitRef="pure">0.0162</oef:AvgAnnlRtrPct>
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      contextRef="D20240301_20240831_C000037542Member_WithoutSalesLoadMember"
      id="t_17_f65c5f36_9a38_11aa_6d78_8a255e0a9b1b">Fund Market</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_C000037542Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_398_abd3da14_4d5b_4bfd_ad46_d0e63782b947"
      unitRef="pure">0.0428</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_C000037542Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_399_1129b685_a75e_4fef_a2d4_d81c88d8784e"
      unitRef="pure">0.0684</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_C000037542Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_400_b8d66e52_152f_4558_8817_e65625b5c8c7"
      unitRef="pure">0.0078</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_C000037542Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_401_47b0618d_ddf4_42ca_805b_192e43b384c3"
      unitRef="pure">0.0162</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_BloombergUSUniversalIndexMember"
      id="t_18_f7f1c705_c178_ff95_f2ee_46fc170ba374">Bloomberg U.S. Universal Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_402_c21bcd63_ec64_4d2d_beb3_facd099b25fa"
      unitRef="pure">0.0499</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_403_0785e7bf_eef4_4d25_942d_b2dc5504bdd7"
      unitRef="pure">0.0792</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_404_d56a1b48_a71b_4fe6_b77d_e131ab1741db"
      unitRef="pure">0.0034</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSUniversalIndexMember"
      decimals="4"
      id="h_405_4337eeb4_3c2f_498f_a467_264891656380"
      unitRef="pure">0.0193</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="D20240301_20240831_BloombergUSIntermediateGovernmentCreditBondIndexMember"
      id="t_19_fedce9b4_f81c_25eb_8f35_d475ecc9b902">Bloomberg U.S. Intermediate Government/Credit Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="D20240301_20240831_BloombergUSIntermediateGovernmentCreditBondIndexMember"
      decimals="4"
      id="h_406_b792c143_d8a0_4e29_aa86_5cf13cbc727e"
      unitRef="pure">0.0437</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_BloombergUSIntermediateGovernmentCreditBondIndexMember"
      decimals="4"
      id="h_407_56519a80_185f_4994_a5c6_7e68e5344337"
      unitRef="pure">0.0711</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_BloombergUSIntermediateGovernmentCreditBondIndexMember"
      decimals="4"
      id="h_408_2be99c47_90f3_49ab_8352_6c136729c2b3"
      unitRef="pure">0.0096</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2024_BloombergUSIntermediateGovernmentCreditBondIndexMember"
      decimals="4"
      id="h_409_43bfd7d1_ab2a_451a_969c_7aeb48b15604"
      unitRef="pure">0.0180</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_11_3fe8e9a0_f464_c355_7444_e00c3aabb636">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3,346,853,291&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;5,599&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000037542Member"
      decimals="INF"
      id="h_410_0ff224d8_743a_4617_90ea_8cbb08757fe9"
      unitRef="USD">3346853291</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000037542Member"
      decimals="INF"
      id="h_411_a5abe586_d4a5_4ac4_acc6_ba064a3b0569"
      unitRef="Holding">5599</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000037542Member"
      decimals="4"
      id="h_412_33da8b2c_5dfd_4217_83de_dbd4ca25a468"
      unitRef="pure">0.11</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000037542Member"
      id="t_12_78cbd9c2_f602_c80b_024b_1c344e9cf53e">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_13_934e4d3c_6555_15fa_b239_8ab42e411849"> 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="D20240301_20240831_C000037542Member"
      id="t_14_74a83036_ded5_df58_f138_89d32f6be6df">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000037542Member"
      id="t_15_a6b54ec3_cb90_5ea3_28cf_d8e0538d56d5"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;68.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;2.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;14.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;14.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;0.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Portfolio composition&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Investment Type&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="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;U.S. Government &amp;amp; Agency Obligations&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-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;65.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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 Bonds &amp;amp; Notes&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-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;31.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Foreign Government Obligations&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-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;3.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Municipal Debt Obligations&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-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; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;*&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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_413_d11a56e8_3a3d_47e8_908e_d490c40eb2a1"
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      id="h_414_227d3864_adcb_4bfc_9647_2b5138cbc956"
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      id="h_415_f52dd63f_99db_411d_85ba_b055118bbe55"
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      id="h_416_138b6ff7_93b8_4653_bca7_a874a96201c5"
      unitRef="pure">0.145</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037542Member_BaMember"
      decimals="4"
      id="h_417_b8133d54_6a7f_47a6_a55a_86c8ba9ff750"
      unitRef="pure">0.006</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037542Member_NotRatedMember"
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      id="h_418_390aa44b_dcbc_4df8_be46_fef867b13830"
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      contextRef="TI20240831_C000037542Member_USGovernmentCorporationsAndAgenciesSecuritiesMember"
      decimals="4"
      id="h_419_b6cba8c5_e82c_f90e_56ca_3e81971eca9a"
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      contextRef="TI20240831_C000037542Member_CorporateBondsAndNotesMember"
      decimals="4"
      id="h_420_89291369_832b_3362_484b_74ed3205d8c3"
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      id="h_421_7419960d_0cf9_3eeb_e03b_1e52afd75a8c"
      unitRef="pure">0.038</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000037542Member_MunicipalDebtObligationsMember"
      decimals="4"
      id="h_422_c1b6eaa8_c952_3114_e77d_870235f873de"
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      contextRef="D20240301_20240831_C000037542Member"
      id="t_20_dc2dfbca_a7c5_111a_313d_811222887517">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000037542Member"
      id="t_21_8b8d2309_05cf_1733_92a6_e189ef59c839">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
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      id="t_1_a14ec076_ad00_8c9e_512d_281d20c0af0e">iShares Investment Grade Systematic Bond ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000182993Member"
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      contextRef="D20240301_20240831_C000182993Member"
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      id="t_5_a16398ab_8a4d_f7fe_bc29_09f58e419ce1">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000182993Member"
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      contextRef="D20240301_20240831_C000182993Member"
      id="t_7_d2d4a173_82a4_bae5_de16_4c6648885fd3">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
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      contextRef="D20240301_20240831_C000182993Member"
      id="t_8_198a9d2c_af45_4936_8346_fe23780472c8"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares Investment Grade Systematic Bond ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.18&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_419_8cf4e90b_543e_4e9d_b02e_ed601083b1be"
      unitRef="USD">9</oef:ExpensesPaidAmt>
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      id="h_420_f718b77a_4cc1_4a79_8233_aad5819d7f6a"
      unitRef="pure">0.0018</oef:ExpenseRatioPct>
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      id="t_9_25cf4888_f023_2000_688e_1198fe8235c8">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;Since Fund&lt;br/&gt;Inception&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: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.64&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.19&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.53&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.55&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.13&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.98&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.68&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;BlackRock Investment Grade Systematic Bond Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.73&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.39&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.71&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.14&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Markit iBoxx USD Liquid Investment Grade Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.60&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;9.62&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;0.43&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.38&lt;/td&gt;
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      contextRef="D20240301_20240831_MarkitIBoxxUSDLiquidInvestmentGradeC000182993IndexMember"
      decimals="4"
      id="h_437_535b0294_e2ec_4581_981c_094d969b22b2"
      unitRef="pure">0.0560</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FY2024_MarkitIBoxxUSDLiquidInvestmentGradeC000182993IndexMember"
      decimals="4"
      id="h_438_3d886b88_d3e0_41cc_88b3_1382ef792903"
      unitRef="pure">0.0962</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2024_MarkitIBoxxUSDLiquidInvestmentGradeIndexMember"
      decimals="4"
      id="h_439_ecacbc5d_a071_4f9a_9ae8_1560fd1964fc"
      unitRef="pure">0.0043</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20170711_20240831_MarkitIBoxxUSDLiquidInvestmentGradeIndexMember"
      decimals="4"
      id="h_440_ae9b04e7_5c96_4c65_83ca_7434a5a4f959"
      unitRef="pure">0.0238</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240301_20240831_C000182993Member"
      id="t_10_827f6c3f_ee79_4e7e_d78b_2e25d1bd2e0f">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;1,512,211,337&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;443&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20240831_C000182993Member"
      decimals="INF"
      id="h_441_c1a766d1_983b_4993_a358_045500160dd9"
      unitRef="USD">1512211337</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20240831_C000182993Member"
      decimals="INF"
      id="h_442_e51e52b4_002f_4c48_b6ab_5aec26c52f3f"
      unitRef="Holding">443</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240301_20240831_C000182993Member"
      decimals="4"
      id="h_443_5f2d9642_1dc2_48f5_94b4_046cf383c0be"
      unitRef="pure">0.34</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerfInceptionDate
      contextRef="D20240301_20240831_C000182993Member"
      id="t_16_00c5c657_8db3_a013_bb41_8926f42775b2">2017-07-11</oef:PerfInceptionDate>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="D20240301_20240831_C000182993Member"
      id="t_24_c5a7192d_43ec_229e_f3b0_c7244c0423b5">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="D20240301_20240831_C000182993Member"
      id="t_25_eabba6e8_10eb_f978_89db_e0020ba734dc">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="D20240301_20240831_C000182993Member"
      id="t_26_59ad7f83_ce1f_8661_ddb0_4f1a1d921384">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000182993Member"
      id="t_14_373f9d8b_55f4_8a73_8dd4_ebcdac8a1500"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Credit quality allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Moody's Credit Rating&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;*&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 6pt;"&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;2.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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&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-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;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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; 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;20.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Baa&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-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;67.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Ba&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-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;5.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Not Rated&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-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;0.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;/em&gt; &lt;br/&gt;&lt;em&gt;Investments&lt;/em&gt; &lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;12.8&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;55.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;7.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;2.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;More than 20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;21.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;&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: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. 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
      contextRef="TI20240831_C000182993Member_MoodysAaaRatingMember"
      decimals="4"
      id="h_444_328c6f5a_f05b_493d_85cf_ef3f724b8f94"
      unitRef="pure">0.024</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182993Member_AaMember"
      decimals="4"
      id="h_445_18eeaf6a_5afd_458a_b19c_9233e01c2fa5"
      unitRef="pure">0.036</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182993Member_AMember"
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      id="h_446_528c1d76_84bb_4b21_8b50_4986584038b8"
      unitRef="pure">0.207</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000182993Member_BaaMember"
      decimals="4"
      id="h_447_6327fd67_318b_42fd_ab2c_fec1afc45b68"
      unitRef="pure">0.674</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182993Member_BaMember"
      decimals="4"
      id="h_448_f7b10418_0034_48aa_90e0_98f7bead5a63"
      unitRef="pure">0.051</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182993Member_NotRatedMember"
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      id="h_449_502bfb58_603e_4be4_89d7_9b8c76cc3607"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000182993Member_OneTo5YearsMember"
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      id="h_450_fb27f0d5_3387_d439_630d_557ba772463b"
      unitRef="pure">0.128</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182993Member_FiveTo10YearsMember"
      decimals="4"
      id="h_451_3c40788f_300a_8a9b_93cd_1e1af2030aa7"
      unitRef="pure">0.557</oef:PctOfTotalInv>
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      contextRef="TI20240831_C000182993Member_TenTo15YearsMember"
      decimals="4"
      id="h_452_fce730e4_c8d6_6353_2e77_4cdd868fa5a6"
      unitRef="pure">0.076</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000182993Member_FifteenTo20YearsMember"
      decimals="4"
      id="h_453_cfa4bb48_5207_9ebd_8a0a_2e64c40f7730"
      unitRef="pure">0.029</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000182993Member_MoreThan20YearsMember"
      decimals="4"
      id="h_454_f436f584_d24e_c62f_e785_4a0eaa4b2acc"
      unitRef="pure">0.210</oef:PctOfTotalInv>
    <oef:CreditQualityExplanationTextBlock
      contextRef="D20240301_20240831_C000182993Member"
      id="t_22_31d2ae92_b6b4_fcdb_d605_3b0f29cc9403">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization. Moody&#x2019;s credit ratings are opinions of the credit quality of individual obligations or of an issuer&#x2019;s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.</oef:CreditQualityExplanationTextBlock>
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      contextRef="D20240301_20240831_C000182993Member"
      id="t_21_e41f9aa4_1619_d63a_46eb_5b041766ae50">Credit quality ratings shown reflect the ratings assigned by Moody&#x2019;s Investors Service (&#x201c;Moody&#x2019;s&#x201d;), a widely used independent, nationally recognized statistical rating organization.</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="D20240301_20240831_C000037544Member"
      id="t_1_251e1d0d_e630_690f_1743_df804407374f">iShares MBS ETF</oef:FundName>
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      contextRef="D20240301_20240831_C000037544Member"
      id="t_2_e853be62_b0d3_925f_78a5_598114d3e92e">iShares MBS ETF</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240301_20240831_C000037544Member"
      id="t_3_a3484b28_baa5_a39a_676a_5041bd1f39cc">MBB</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D20240301_20240831_C000037544Member"
      id="t_20_1d35e538_9a76_1493_e7ca_e7d16a2b4426">NASDAQ</dei:SecurityExchangeName>
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      contextRef="D20240301_20240831_C000037544Member"
      id="t_5_0e2e6fca_e56e_051e_89b1_2afa8583f815">This semi-annual shareholder report contains important information about iShares MBS ETF (the &#x201c;Fund&#x201d;) for the period of March 1, 2024 to August 31, 2024.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240301_20240831_C000037544Member"
      id="t_4_f25cf983_dcb1_8ca7_0e8d_3a4f84d03b8f">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="D20240301_20240831_C000037544Member"
      id="t_6_aa6d6153_f0ed_4078_01a1_7d2cca12cf03">You can find additional information about the Fund&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;at &lt;span style="color: #000000; 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;&lt;b&gt;.&lt;/b&gt; You can also request this information by contacting us at 1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737).</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240301_20240831_C000037544Member"
      id="t_7_b5b63033_11fc_e3b7_1a17_c5438ff0571d">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240301_20240831_C000037544Member"
      id="t_8_5591c881_83cc_3e95_091e_bb1d1b918b79">1&#x2011;800&#x2011;iShares (1&#x2011;800&#x2011;474&#x2011;2737)</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="D20240301_20240831_C000037544Member"
      id="t_9_12c3e92c_5bd5_8732_f8a4_74629852b28e"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;&lt;b&gt;What were the Fund costs for the last six months?&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: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; border-bottom-color: #000000;"&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: #000000; background-color: #76bc21; text-align: left; padding: 2pt 0 2pt 0;"&gt;Fund 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: #000000; background-color: #76bc21; 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: #000000; background-color: #76bc21; text-align: center; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a&lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; overflow-x: hidden; text-align: left; padding: 4pt 0 2pt 0;"&gt;iShares MBS ETF&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; font-size: 9pt; line-height: 11pt; color: #000000; text-align: center; padding: 4pt 0 2pt 0;"&gt;0.04&lt;span&gt;%&lt;/span&gt;&lt;span style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/span&gt;&lt;sup style="vertical-align: 0.5em; font-size: smaller; line-height: 0px;"&gt;&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; text-indent: 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&lt;sup style="vertical-align: middle; font-size: smaller;"&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; color: #000000; text-indent: 0; width: 100%; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Annualized.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240301_20240831_C000037544Member"
      decimals="INF"
      id="h_450_0f801eb0_b18e_448b_aa65_3639fc8d35c9"
      unitRef="USD">2</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240301_20240831_C000037544Member"
      decimals="4"
      id="h_451_e3a03a86_b93a_4b4a_a401_a0648e7b6262"
      unitRef="pure">0.0004</oef:ExpenseRatioPct>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="D20240301_20240831_C000037544Member"
      id="t_10_c014ffed_c67d_82be_c3da_69c6b966cc21">
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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: #000000; 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: #000000; 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: #000000; 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: #000000; 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-inside: avoid-page; border-bottom-style: none; border-bottom-width: initial; 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: #000000; 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: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;6-Month&lt;br/&gt;Total&lt;br/&gt;Returns&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: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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: #000000; border-bottom-color: #000000; 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; white-space: nowrap; width: auto; border-bottom-color: #000000; 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-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund NAV&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.47&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.49&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.23&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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;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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.17&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Fund Market&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.64&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.63&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;(0.19&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Bloomberg U.S. Universal Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;7.92&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;0.34&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;1.93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;Bloomberg U.S. MBS Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;5.47&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;7.46&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;(0.18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 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: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;1.28&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; 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>
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&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; background-color: #76bc21; border-bottom-color: #000000;"&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: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt; white-space: nowrap;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;33,451,226,293&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 0 6pt;"&gt;10,980&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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    <oef:HoldingsCount
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    <us-gaap:InvestmentCompanyPortfolioTurnover
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      decimals="4"
      id="h_470_195813d2_ac75_4ace_a6d0_0ae8a249b619"
      unitRef="pure">0.73</us-gaap:InvestmentCompanyPortfolioTurnover>
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      id="t_12_cfd44906_3472_9aaf_5bbe_23f48db7de60">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
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      id="t_19_0a3e258d_dc0d_1c5c_920f_a3bb408fab33">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>
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      contextRef="D20240301_20240831_C000037544Member"
      id="t_13_80d55690_f3cd_412f_b2df_261219c20822">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;iShares.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="D20240301_20240831_C000037544Member"
      id="t_14_7a68a63a_4346_4ba3_2e2d_01d1f4df7675"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; 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: #000000; margin-bottom: 0px;"&gt;(as of August 31, 2024)&lt;/div&gt;  &lt;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Issuer allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Issuer&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;Percent of Total&lt;br/&gt;Investments&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Uniform Mortgage-Backed Securities&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-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;75.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Government National Mortgage Association&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-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;22.0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; 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;Federal Home Loan Mortgage Corp.&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-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;2.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;Federal National Mortgage Association&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-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;0.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; 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;div style="font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #76bc21; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Maturity allocation&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-style: solid; border-bottom-width: 0.5pt; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&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;Maturity&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 0;"&gt;&lt;em&gt;Percent of Total&lt;br/&gt;Investments&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; width: auto; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;1-5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;0.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;5-10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;2.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;10-15 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;8.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;15-20 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;3.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;20-25 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;14.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;25-30 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;68.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-style: solid; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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%; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;30-35 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; text-align: right; font-kerning: none; color: #000000; 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;3.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; 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-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-style: none; 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; vertical-align: top; width: initial; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="vertical-align: middle; font-size: smaller;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; 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: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes money market funds.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_UniformMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_471_970af8b2_9a2c_4c6f_a8d7_3c8a84b21d09"
      unitRef="pure">0.752</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember"
      decimals="4"
      id="h_472_ac7c73e8_ef79_4ca0_a560_a486978c3d90"
      unitRef="pure">0.220</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember"
      decimals="4"
      id="h_473_547bcc2f_1f85_4751_a024_749b5018228c"
      unitRef="pure">0.027</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_FederalNationalMortgageAssociationFnmaInsuredLoansMember"
      decimals="4"
      id="h_474_b31efecd_f07a_40d6_a329_4f4e3c8f1c38"
      unitRef="pure">0.001</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_OneTo5YearsMember"
      decimals="4"
      id="h_475_aaee20b8_feb4_39a4_c24e_22fe465a474d"
      unitRef="pure">0.002</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_FiveTo10YearsMember"
      decimals="4"
      id="h_476_19e99a8e_2ecd_10ae_3a13_7a5d75faa52c"
      unitRef="pure">0.023</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_TenTo15YearsMember"
      decimals="4"
      id="h_477_3a0a9bbe_6a9b_d8c3_f743_054c4b5facc8"
      unitRef="pure">0.086</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_FifteenTo20YearsMember"
      decimals="4"
      id="h_478_eb58fa36_bf08_697c_0171_881d9a5a74ae"
      unitRef="pure">0.034</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_TwentyTo25YearsMember"
      decimals="4"
      id="h_479_a9cd0f43_32b5_6b37_c96a_a548ac6c3a43"
      unitRef="pure">0.141</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20240831_C000037544Member_TwentyFiveTo30YearsMember"
      decimals="4"
      id="h_480_4315a9d1_57a2_1188_3057_301cf8dc7dde"
      unitRef="pure">0.681</oef:PctOfTotalInv>
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