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&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; margin-bottom: 1.5pt;"&gt;What were the Fund costs for the last six months?&lt;/div&gt;

&lt;div style="margin-top: 0px; margin-bottom: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt;"&gt;&lt;i&gt;(based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;

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&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); width: 33%; vertical-align: middle; text-align: center; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Share Class Name&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: center; width: 33%; vertical-align: middle; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Costs of a $10,000 investment&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: center; width: 33%; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Costs paid as a percentage of a $10,000 investment&lt;/strong&gt;&lt;/td&gt;
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&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; text-align: center; font-weight: normal; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Investor Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-weight: normal; font-size: 8pt; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;9&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-weight: normal; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;0.18&lt;span&gt;%&lt;/span&gt;&lt;sup&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;

&lt;table style="border-collapse: collapse; break-inside: avoid; width: auto; margin-top: 4pt;"&gt;


&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-color: initial; border-bottom-style: none; height: auto;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; width: 0px; vertical-align: top; text-align: center; font-weight: normal; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; vertical-align: baseline; font-weight: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; line-height: 99%; color: rgb(0, 0, 0); font-family: 'arial'; font-style: normal; font-size: 8pt; text-align: left; margin-bottom: 0px;"&gt;&#x200b;&lt;sup&gt;1&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; vertical-align: baseline; font-weight: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; text-align: left; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 0 0 3pt;"&gt;

&lt;div style="color: rgb(0, 0, 0); margin-top: 0px; margin-bottom: 0px; line-height: 99%; font-family: 'arial'; font-style: normal; font-size: 8pt; text-align: left;"&gt;Annualized.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:ExpensesTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; top: 0.7pt; left: 0.7pt; background-image: initial; border-right-width: 0; padding: 2pt;"&gt;&lt;strong&gt;Fund Statistics&lt;br/&gt;(as of June 30, 2026)&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); border-right-color: initial; border-right-style: none; border-right-width: 0; text-align: left; top: 0.7pt; left: 0.7pt; background-image: initial; padding: 2pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Fund Net Assets&lt;br/&gt;(in millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;63,699&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;16,316&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
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&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; padding: 2pt;"&gt;&lt;strong&gt;Portfolio Composition % of Net Assets&lt;br/&gt;(as of June 30, 2026)&lt;/strong&gt;&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;61.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;9.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Rights&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Taxable Municipal Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;U.S. Government and Agency Obligations&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;26.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Other Assets and Liabilities&#x2014;Net&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.5&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-color: initial; border-bottom-style: none; height: 20pt;"&gt;
&lt;td colspan="2" style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;&lt;strong&gt;This table reflects the Fund&#x2019;s investments, including short-term investments, derivatives and other assets and liabilities.&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:HoldingsTableTextBlock>
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      id="h_7_b92bcc90_8fd6_4025_9778_f47fab026055"
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      id="h_8_1f5c1b5c_9cce_49be_8afe_542f417ce7b3"
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      contextRef="TI20260630_C000007054Member_SovereignDebtMember"
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      id="h_9_b49a4ef2_f47c_47a8_a461_85ee57ed3f27"
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      contextRef="TI20260630_C000007054Member_TaxableMunicipalBondsMember"
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      id="h_10_542c4adf_dbbf_4c0a_aea6_0f3209f0ea7a"
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    <oef:PctOfNav
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    <oef:MaterialFundChngTextBlock
      contextRef="D20251231_20260630_C000007054Member"
      id="t_40_79d1e0a4_1704_e545_3705_e9d1cd25954a">&lt;div style="line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; margin-bottom: 1.5pt; margin-top: 10pt;"&gt;How has the Fund changed?&lt;/div&gt;&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt; margin-bottom: 5pt;"&gt;Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.&lt;/div&gt;&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since December 31, 2025. For more complete information, you may review the Fund&#x2019;s prospectus at &lt;span style="text-decoration-line: underline; color: rgb(0, 0, 0); white-space: nowrap; line-height: 99%; font-family: 'arial'; font-size: 8pt;"&gt;https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature&lt;/span&gt; or upon request at 800-662-7447.&lt;/div&gt;</oef:MaterialFundChngTextBlock>
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      contextRef="D20251231_20260630_C000007054Member"
      id="t_41_57dc1fae_345e_6ac2_1136_4e0cb0be33ea">&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since December 31, 2025. For more complete information, you may review the Fund&#x2019;s prospectus at &lt;span style="text-decoration-line: underline; color: rgb(0, 0, 0); white-space: nowrap; line-height: 99%; font-family: 'arial'; font-size: 8pt;"&gt;https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature&lt;/span&gt; or upon request at 800-662-7447.&lt;/div&gt;</oef:SummaryOfChngLegendTextBlock>
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    <oef:FundName
      contextRef="D20251231_20260630_C000007055Member"
      id="t_36_8a094907_30c7_d010_2435_9784d5f97043">Vanguard Balanced Index Fund</oef:FundName>
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      id="t_37_c8b05d39_5fa5_8cd1_08c0_bcc838364217">Admiral&#x2122; Shares</oef:ClassName>
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      contextRef="D20251231_20260630_C000007055Member"
      id="t_10_bb1562fa_0201_4bc5_8d26_da4994cc8812">This semi-annual shareholder report contains important information about Vanguard Balanced Index Fund (the "Fund") for the period of &lt;span style="white-space: nowrap;"&gt;January 1, 2026&lt;/span&gt;, to &lt;span style="white-space: nowrap;"&gt;June 30, 2026&lt;/span&gt;.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="D20251231_20260630_C000007055Member"
      id="t_39_214bce2c_84aa_e814_4fdb_17ac9f0ff6a8">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: rgb(0, 0, 0); white-space: nowrap; line-height: 99%; font-family: 'arial'; font-size: 8pt;"&gt;https://personal1.vanguard.com/ngf&#x2011;next&#x2011;gen&#x2011;form&#x2011;webapp/fund&#x2011;literature&lt;/span&gt;. You can also request this information by contacting us at 800-662-7447.</oef:AddlInfoTextBlock>
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      id="t_40_03612d43_4a50_6a83_2d38_abebbaf1f5bd">https://personal1.vanguard.com/ngf&#x2011;next&#x2011;gen&#x2011;form&#x2011;webapp/fund&#x2011;literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20251231_20260630_C000007055Member"
      id="t_14_43bfa653_1d7e_4813_8c9b_2dd047949bd6">800-662-7447</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="D20251231_20260630_C000007055Member"
      id="t_41_7f014d28_e20e_3c4b_92a5_a29f1cc5bdcc">The report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="D20251231_20260630_C000007055Member"
      id="t_42_7652725f_af23_f501_e7dd_000b5f27f51e">&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; margin-bottom: 1.5pt;"&gt;What were the Fund costs for the last six months?&lt;/div&gt;&lt;div style="margin-top: 0px; margin-bottom: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt;"&gt;&lt;i&gt;(based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); width: 33%; vertical-align: middle; text-align: center; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Share Class Name&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: center; width: 33%; vertical-align: middle; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Costs of a $10,000 investment&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: center; width: 33%; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Costs paid as a percentage of a $10,000 investment&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.25pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; text-align: center; font-weight: normal; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Admiral Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-weight: normal; font-size: 8pt; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;4&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-weight: normal; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;0.07&lt;span&gt;%&lt;/span&gt;&lt;sup&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;&lt;table style="border-collapse: collapse; break-inside: avoid; width: auto; margin-top: 4pt;"&gt;


&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-color: initial; border-bottom-style: none; height: auto;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; width: 0px; vertical-align: top; text-align: center; font-weight: normal; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; vertical-align: baseline; font-weight: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; line-height: 99%; color: rgb(0, 0, 0); font-family: 'arial'; font-style: normal; font-size: 8pt; text-align: left; margin-bottom: 0px;"&gt;&#x200b;&lt;sup&gt;1&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; vertical-align: baseline; font-weight: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; text-align: left; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 0 0 3pt;"&gt;

&lt;div style="color: rgb(0, 0, 0); margin-top: 0px; margin-bottom: 0px; line-height: 99%; font-family: 'arial'; font-style: normal; font-size: 8pt; text-align: left;"&gt;Annualized.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20251231_20260630_C000007055Member"
      decimals="INF"
      id="h_13_530d8992_a4f0_479d_b143_90313af6822a"
      unitRef="USD">4</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20251231_20260630_C000007055Member"
      decimals="4"
      id="h_14_23f11059_1069_4ed2_b545_13c2b7a04f5c"
      unitRef="pure">0.0007</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20251231_20260630_C000007055Member"
      id="t_16_9d5d67cd_34c3_4d97_b155_e8dd56b35bc5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; top: 0.7pt; left: 0.7pt; background-image: initial; border-right-width: 0; padding: 2pt;"&gt;&lt;strong&gt;Fund Statistics&lt;br/&gt;(as of June 30, 2026)&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); border-right-color: initial; border-right-style: none; border-right-width: 0; text-align: left; top: 0.7pt; left: 0.7pt; background-image: initial; padding: 2pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Fund Net Assets&lt;br/&gt;(in millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;63,699&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;16,316&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260630_C000007055Member"
      decimals="INF"
      id="h_15_0cf37962_8737_487a_afb6_47808735b932"
      unitRef="USD">63699000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260630_C000007055Member"
      decimals="INF"
      id="h_16_f08796c5_824a_4e37_a714_cdda56b9874f"
      unitRef="Holding">16316</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20251231_20260630_C000007055Member"
      decimals="4"
      id="h_17_78a52efb_304c_49ca_82a5_125a2407f6d2"
      unitRef="pure">0.21</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20251231_20260630_C000007055Member"
      id="t_17_e0275634_6509_4bd8_85fe_d0b7128b2207">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; padding: 2pt;"&gt;&lt;strong&gt;Portfolio Composition % of Net Assets&lt;br/&gt;(as of June 30, 2026)&lt;/strong&gt;&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;61.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;9.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Rights&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Taxable Municipal Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;U.S. Government and Agency Obligations&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;26.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Other Assets and Liabilities&#x2014;Net&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.5&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-color: initial; border-bottom-style: none; height: 20pt;"&gt;
&lt;td colspan="2" style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;&lt;strong&gt;This table reflects the Fund&#x2019;s investments, including short-term investments, derivatives and other assets and liabilities.&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_AssetBackedCommercialMortgageBackedSecuritiesMember"
      decimals="4"
      id="h_25_e5fdacdf_e0ef_d09d_8233_d5cb949233fc"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_CommonStockMember"
      decimals="4"
      id="h_18_21c4736b_4289_40e5_b64f_8e9d41e0b846"
      unitRef="pure">0.612</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_19_893bc2e2_d793_4505_8218_3bde2c1536be"
      unitRef="pure">0.097</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_RightsMember"
      decimals="4"
      id="h_20_4c2d2ae4_03b8_402e_a46a_a4d6e0845efa"
      unitRef="pure">0.000</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_SovereignDebtMember"
      decimals="4"
      id="h_21_203ac686_ebc3_420c_8913_a5430cac8ad2"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_TaxableMunicipalBondsMember"
      decimals="4"
      id="h_22_36c6b234_21c5_472e_a4e0_ec3a5ceb65e9"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_USGovernmentCorporationsAndAgenciesSecuritiesMember"
      decimals="4"
      id="h_23_cb625c89_a960_4ad6_bdc7_9e21c3b0d323"
      unitRef="pure">0.263</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20260630_C000007055Member_OtherAssetsAndLiabilitiesNetMember"
      decimals="4"
      id="h_24_b8f3a087_0656_4be8_a205_1778b850fc64"
      unitRef="pure">0.005</oef:PctOfNav>
    <oef:MaterialFundChngTextBlock
      contextRef="D20251231_20260630_C000007055Member"
      id="t_43_9d855847_0179_8d9b_3adf_7ad61eaa7eed">&lt;div style="line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; margin-bottom: 1.5pt; margin-top: 10pt;"&gt;How has the Fund changed?&lt;/div&gt;&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt; margin-bottom: 5pt;"&gt;Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.&lt;/div&gt;&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since December 31, 2025. For more complete information, you may review the Fund&#x2019;s prospectus at &lt;span style="text-decoration-line: underline; color: rgb(0, 0, 0); white-space: nowrap; line-height: 99%; font-family: 'arial'; font-size: 8pt;"&gt;https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature&lt;/span&gt; or upon request at 800-662-7447.&lt;/div&gt;</oef:MaterialFundChngTextBlock>
    <oef:SummaryOfChngLegendTextBlock
      contextRef="D20251231_20260630_C000007055Member"
      id="t_44_c64bae1b_2595_5e00_7071_82c7ccf2781a">&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt; margin-bottom: 5pt;"&gt;This is a summary of certain changes to the Fund since December 31, 2025. For more complete information, you may review the Fund&#x2019;s prospectus at &lt;span style="text-decoration-line: underline; color: rgb(0, 0, 0); white-space: nowrap; line-height: 99%; font-family: 'arial'; font-size: 8pt;"&gt;https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature&lt;/span&gt; or upon request at 800-662-7447.&lt;/div&gt;</oef:SummaryOfChngLegendTextBlock>
    <oef:UpdProspectusWebAddress
      contextRef="D20251231_20260630_C000007055Member"
      id="t_35_62694d9d_b960_4ba4_a8b1_d665b6c83c68">https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature</oef:UpdProspectusWebAddress>
    <oef:UpdProspectusPhoneNumber
      contextRef="D20251231_20260630_C000007055Member"
      id="t_34_6e97e4bd_a81d_423c_ae12_84a3d0e3c4f2">800-662-7447</oef:UpdProspectusPhoneNumber>
    <oef:FundName
      contextRef="D20251231_20260630_C000007056Member"
      id="t_41_0cc14f9e_ff4e_614e_fb60_47614ea4b862">Vanguard Balanced Index Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20251231_20260630_C000007056Member"
      id="t_39_19629ff4_5777_0ae5_0bfc_fdb34ef092da">Institutional Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20251231_20260630_C000007056Member"
      id="t_40_afa9c543_70c2_4a01_5715_aebf60c5bdbf">VBAIX</dei:TradingSymbol>
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      contextRef="D20251231_20260630_C000007056Member"
      id="t_19_718e4494_d080_4b59_b049_c2f40fdf6e8b">This semi-annual shareholder report contains important information about Vanguard Balanced Index Fund (the "Fund") for the period of &lt;span style="white-space: nowrap;"&gt;January 1, 2026&lt;/span&gt;, to &lt;span style="white-space: nowrap;"&gt;June 30, 2026&lt;/span&gt;.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20251231_20260630_C000007056Member"
      id="t_20_266c1cee_bf30_4c4f_b92d_0ef5713afc36">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20251231_20260630_C000007056Member"
      id="t_43_a2f107ff_03f1_211e_360b_4d22651e0451">You can find additional information about the Fund at &lt;span style="text-decoration-line: underline; color: rgb(0, 0, 0); white-space: nowrap; line-height: 99%; font-family: 'arial'; font-size: 8pt;"&gt;https://personal1.vanguard.com/ngf&#x2011;next&#x2011;gen&#x2011;form&#x2011;webapp/fund&#x2011;literature&lt;/span&gt;. You can also request this information by contacting us at 800-662-7447.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20251231_20260630_C000007056Member"
      id="t_42_4e9ef5b1_a2f8_243d_f2fb_e3a0b23b7f2e">https://personal1.vanguard.com/ngf&#x2011;next&#x2011;gen&#x2011;form&#x2011;webapp/fund&#x2011;literature</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20251231_20260630_C000007056Member"
      id="t_23_9773ecb0_6bc1_46cd_8d14_fb0901a9da7f">800-662-7447</oef:AddlInfoPhoneNumber>
    <oef:MaterialFundChngNoticeTextBlock
      contextRef="D20251231_20260630_C000007056Member"
      id="t_44_951fc843_1756_ff62_d639_d6f658838bd6">The report describes changes to the Fund that occurred during the reporting period.</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
      contextRef="D20251231_20260630_C000007056Member"
      id="t_45_66c37226_f751_7218_5c2e_1f213338d9bc">&lt;div style="margin-top: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; margin-bottom: 1.5pt;"&gt;What were the Fund costs for the last six months?&lt;/div&gt;&lt;div style="margin-top: 0px; margin-bottom: 0px; line-height: 99%; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 8pt;"&gt;&lt;i&gt;(based on a hypothetical $10,000 investment)&lt;/i&gt;&lt;/div&gt;&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); width: 33%; vertical-align: middle; text-align: center; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Share Class Name&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: center; width: 33%; vertical-align: middle; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Costs of a $10,000 investment&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: center; width: 33%; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;strong&gt;Costs paid as a percentage of a $10,000 investment&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.25pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; text-align: center; font-weight: normal; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Institutional Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-weight: normal; font-size: 8pt; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;2&lt;sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: center; font-weight: normal; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;0.04&lt;span&gt;%&lt;/span&gt;&lt;sup&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/sup&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;&lt;table style="border-collapse: collapse; break-inside: avoid; width: auto; margin-top: 4pt;"&gt;


&lt;tr style="break-inside: avoid-page; border-bottom-width: initial; border-bottom-color: initial; border-bottom-style: none; height: auto;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; width: 0px; vertical-align: top; text-align: center; font-weight: normal; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; vertical-align: baseline; font-weight: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; text-align: left; padding: 0;"&gt;
&lt;div style="margin-top: 0px; line-height: 99%; color: rgb(0, 0, 0); font-family: 'arial'; font-style: normal; font-size: 8pt; text-align: left; margin-bottom: 0px;"&gt;&#x200b;&lt;sup&gt;1&lt;/sup&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; line-height: normal; vertical-align: baseline; font-weight: normal; font-family: 'Arial'; font-style: normal; font-size: 8pt; text-align: left; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 0 0 3pt;"&gt;

&lt;div style="color: rgb(0, 0, 0); margin-top: 0px; margin-bottom: 0px; line-height: 99%; font-family: 'arial'; font-style: normal; font-size: 8pt; text-align: left;"&gt;Annualized.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20251231_20260630_C000007056Member"
      decimals="INF"
      id="h_25_1d602db7_6108_40c6_ba10_40826222f094"
      unitRef="USD">2</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20251231_20260630_C000007056Member"
      decimals="4"
      id="h_26_b7615be1_b611_4813_8e91_9452b6cb5fb9"
      unitRef="pure">0.0004</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20251231_20260630_C000007056Member"
      id="t_25_ed550aa3_d67d_4674_93d9_bcec52207ba9">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-after: avoid; break-inside: avoid-page; border-top-color: rgb(0, 0, 0); border-top-style: solid; border-top-width: 0.25pt; height: 20pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; top: 0.7pt; left: 0.7pt; background-image: initial; border-right-width: 0; padding: 2pt;"&gt;&lt;strong&gt;Fund Statistics&lt;br/&gt;(as of June 30, 2026)&lt;/strong&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; background-color: rgb(242, 242, 242); border-right-color: initial; border-right-style: none; border-right-width: 0; text-align: left; top: 0.7pt; left: 0.7pt; background-image: initial; padding: 2pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Fund Net Assets&lt;br/&gt;(in millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;63,699&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;16,316&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-width: 0.5pt; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; height: 20pt;"&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; color: rgb(0, 0, 0); font-size: 8pt; font-family: 'Arial'; text-align: left; font-weight: normal; width: 75%; padding: 2pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: right; padding: 2pt;"&gt;21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260630_C000007056Member"
      decimals="INF"
      id="h_27_c5870a61_7881_4021_a7e1_b4ea00af8c1c"
      unitRef="USD">63699000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260630_C000007056Member"
      decimals="INF"
      id="h_28_fd363c09_963c_430f_b44d_f8bddeb5c912"
      unitRef="Holding">16316</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20251231_20260630_C000007056Member"
      decimals="4"
      id="h_29_a54f1019_c7a8_4745_a8e7_8ab61d4d5807"
      unitRef="pure">0.21</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="D20251231_20260630_C000007056Member"
      id="t_26_5149343d_3b3d_42ea_8580_ce2597c7ddf5">
&lt;table style="width: 100%; border-collapse: collapse; break-inside: avoid;"&gt;


&lt;tr style="break-inside: avoid-page;border-top-color: rgb(0, 0, 0);border-top-style: solid;border-top-width: 0.25pt;height: 20pt;border-bottom-color: rgb(0, 0, 0);border-bottom-style: solid;border-bottom-width: 0.5pt"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; padding: 2pt;"&gt;&lt;strong&gt;Portfolio Composition % of Net Assets&lt;br/&gt;(as of June 30, 2026)&lt;/strong&gt;&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; background-color: rgb(242, 242, 242); text-align: left; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Asset-Backed/Commercial Mortgage-Backed Securities&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Common Stocks&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;61.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Corporate Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;9.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Rights&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Sovereign Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Taxable Municipal Bonds&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;U.S. Government and Agency Obligations&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;26.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; border-bottom-color: rgb(0, 0, 0); border-bottom-style: solid; border-bottom-width: 0.5pt; height: 20pt;"&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; padding: 2pt;"&gt;Other Assets and Liabilities&#x2014;Net&lt;/td&gt;
&lt;td style="color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; line-height: normal; font-family: 'Arial'; font-size: 8pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;0.5&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-color: initial; border-bottom-style: none; height: 20pt;"&gt;
&lt;td colspan="2" style="color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; line-height: normal; text-align: left; font-family: 'Arial'; font-size: 8pt; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt;"&gt;&lt;strong&gt;This table reflects the Fund&#x2019;s investments, including short-term investments, derivatives and other assets and liabilities.&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;


&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfNav
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      decimals="4"
      id="h_37_1af0e8db_c4e2_4a3f_5243_c69b9084dac0"
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      contextRef="TI20260630_C000007056Member_CorporateBondSecuritiesMember"
      decimals="4"
      id="h_31_8ea1f8cc_58df_4852_af70_9e608b8ddece"
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    <oef:PctOfNav
      contextRef="TI20260630_C000007056Member_RightsMember"
      decimals="4"
      id="h_32_c8cda857_bd18_4bf0_9973_24945f315510"
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    <oef:PctOfNav
      contextRef="TI20260630_C000007056Member_SovereignDebtMember"
      decimals="4"
      id="h_33_5f0d2ef9_4ca0_4d6a_927a_08f6a9c8f789"
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      contextRef="TI20260630_C000007056Member_TaxableMunicipalBondsMember"
      decimals="4"
      id="h_34_67407395_15fb_4924_af3a_327d89d57c67"
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