This semi-annual shareholder report contains important information about Vanguard FTSE Social Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

<span style="white-space: nowrap; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto;"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: collapse;"><span style="text-decoration: underline; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: collapse;">https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature</span></span></span>

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$7	0.13%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 7

Expense Ratio, Percent

^[1]

0.13%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 24,856,000,000

Holdings Count | Holding

398

InvestmentCompanyPortfolioTurnover

4.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$24,856
Number of Portfolio Holdings	398
Portfolio Turnover Rate	4%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Basic Materials	1.6%
Consumer Discretionary	15.7%
Consumer Staples	4.0%
Energy	0.0%
Financials	9.4%
Health Care	10.3%
Industrials	6.8%
Real Estate	2.3%
Technology	46.4%
Telecommunications	2.5%
Utilities	0.5%
Other Assets and Liabilities—Net	0.5%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

This is a summary of certain changes to the Fund since August 31, 2025. For more complete information, you may review the Fund’s prospectus, at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature or upon request at 800-662-7447.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012204

Shareholder Report [Line Items]

Fund Name

FTSE Social Index Fund

Class Name

Institutional Shares

Trading Symbol

VFTNX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard FTSE Social Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares	$3	0.06%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 3

Expense Ratio, Percent

^[2]

0.06%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 24,856,000,000

Holdings Count | Holding

398

InvestmentCompanyPortfolioTurnover

4.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$24,856
Number of Portfolio Holdings	398
Portfolio Turnover Rate	4%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Basic Materials	1.6%
Consumer Discretionary	15.7%
Consumer Staples	4.0%
Energy	0.0%
Financials	9.4%
Health Care	10.3%
Industrials	6.8%
Real Estate	2.3%
Technology	46.4%
Telecommunications	2.5%
Utilities	0.5%
Other Assets and Liabilities—Net	0.5%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012206

Shareholder Report [Line Items]

Fund Name

Materials Index Fund

Class Name

ETF Shares

Trading Symbol

VAW

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Materials Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[3]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 4,733,000,000

Holdings Count | Holding

115

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$4,733
Number of Portfolio Holdings	115
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Chemicals	48.4%
Construction Materials	12.7%
Containers & Packaging	10.4%
Metals & Mining	27.6%
Paper & Forest Products	0.5%
Other Assets and Liabilities—Net	0.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012205

Shareholder Report [Line Items]

Fund Name

Materials Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VMIAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Materials Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[4]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 4,733,000,000

Holdings Count | Holding

115

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$4,733
Number of Portfolio Holdings	115
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Chemicals	48.4%
Construction Materials	12.7%
Containers & Packaging	10.4%
Metals & Mining	27.6%
Paper & Forest Products	0.5%
Other Assets and Liabilities—Net	0.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012209

Shareholder Report [Line Items]

Fund Name

Communication Services Index Fund

Class Name

ETF Shares

Trading Symbol

VOX

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Communication Services Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[5]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 6,323,000,000

Holdings Count | Holding

119

InvestmentCompanyPortfolioTurnover

11.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$6,323
Number of Portfolio Holdings	119
Portfolio Turnover Rate	11%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Diversified Telecommunication Services	11.2%
Entertainment	24.7%
Interactive Media & Services	47.8%
Media	12.7%
Wireless Telecommunication Services	3.3%
Other Assets and Liabilities—Net	0.3%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012208

Shareholder Report [Line Items]

Fund Name

Communication Services Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VTCAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Communication Services Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[6]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 6,323,000,000

Holdings Count | Holding

119

InvestmentCompanyPortfolioTurnover

11.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$6,323
Number of Portfolio Holdings	119
Portfolio Turnover Rate	11%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Diversified Telecommunication Services	11.2%
Entertainment	24.7%
Interactive Media & Services	47.8%
Media	12.7%
Wireless Telecommunication Services	3.3%
Other Assets and Liabilities—Net	0.3%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012210

Shareholder Report [Line Items]

Fund Name

U.S. Growth Fund

Class Name

Investor Shares

Trading Symbol

VWUSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard U.S. Growth Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$18	0.37%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 18

Expense Ratio, Percent

^[7]

0.37%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 43,704,000,000

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$43,704
Number of Portfolio Holdings	109
Portfolio Turnover Rate	23%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Communication Services	16.2%
Consumer Discretionary	13.6%
Consumer Staples	1.2%
Financials	6.0%
Health Care	10.7%
Industrials	6.3%
Information Technology	42.2%
Materials	0.3%
Other	0.3%
Real Estate	1.3%
Utilities	0.5%
Other Assets and Liabilities—Net	1.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities through its wholly-owned subsidiaries, Vanguard Capital Management, LLC and Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012211

Shareholder Report [Line Items]

Fund Name

U.S. Growth Fund

Class Name

Admiral™ Shares

Trading Symbol

VWUAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard U.S. Growth Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$13	0.27%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 13

Expense Ratio, Percent

^[8]

0.27%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 43,704,000,000

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$43,704
Number of Portfolio Holdings	109
Portfolio Turnover Rate	23%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Communication Services	16.2%
Consumer Discretionary	13.6%
Consumer Staples	1.2%
Financials	6.0%
Health Care	10.7%
Industrials	6.3%
Information Technology	42.2%
Materials	0.3%
Other	0.3%
Real Estate	1.3%
Utilities	0.5%
Other Assets and Liabilities—Net	1.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Material Fund Change Adviser [Text Block]

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012213

Shareholder Report [Line Items]

Fund Name

Utilities Index Fund

Class Name

ETF Shares

Trading Symbol

VPU

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Utilities Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[9]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 11,029,000,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$11,029
Number of Portfolio Holdings	70
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Electric Utilities	61.7%
Gas Utilities	4.8%
Independent Power and Renewable Electricity Producers	6.0%
Multi-Utilities	24.0%
Water Utilities	3.0%
Other Assets and Liabilities—Net	0.5%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012212

Shareholder Report [Line Items]

Fund Name

Utilities Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VUIAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Utilities Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[10]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 11,029,000,000

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$11,029
Number of Portfolio Holdings	70
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Electric Utilities	61.7%
Gas Utilities	4.8%
Independent Power and Renewable Electricity Producers	6.0%
Multi-Utilities	24.0%
Water Utilities	3.0%
Other Assets and Liabilities—Net	0.5%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012215

Shareholder Report [Line Items]

Fund Name

Consumer Discretionary Index Fund

Class Name

ETF Shares

Trading Symbol

VCR

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Consumer Discretionary Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$4	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[11]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 6,681,000,000

Holdings Count | Holding

288

InvestmentCompanyPortfolioTurnover

7.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$6,681
Number of Portfolio Holdings	288
Portfolio Turnover Rate	7%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Automobile Components	2.0%
Automobiles	19.1%
Broadline Retail	25.8%
Distributors	0.7%
Diversified Consumer Services	1.8%
Hotels, Restaurants & Leisure	20.9%
Household Durables	5.0%
Leisure Products	1.0%
Specialty Retail	20.0%
Textiles, Apparel & Luxury Goods	3.6%
Other Assets and Liabilities—Net	0.1%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012214

Shareholder Report [Line Items]

Fund Name

Consumer Discretionary Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VCDAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Consumer Discretionary Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$4	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[12]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 6,681,000,000

Holdings Count | Holding

288

InvestmentCompanyPortfolioTurnover

7.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$6,681
Number of Portfolio Holdings	288
Portfolio Turnover Rate	7%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Automobile Components	2.0%
Automobiles	19.1%
Broadline Retail	25.8%
Distributors	0.7%
Diversified Consumer Services	1.8%
Hotels, Restaurants & Leisure	20.9%
Household Durables	5.0%
Leisure Products	1.0%
Specialty Retail	20.0%
Textiles, Apparel & Luxury Goods	3.6%
Other Assets and Liabilities—Net	0.1%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012217

Shareholder Report [Line Items]

Fund Name

Consumer Staples Index Fund

Class Name

ETF Shares

Trading Symbol

VDC

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Consumer Staples Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[13]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 9,866,000,000

Holdings Count | Holding

107

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$9,866
Number of Portfolio Holdings	107
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Beverages	19.4%
Consumer Staples Distribution & Retail	38.4%
Food Products	14.1%
Household Products	16.1%
Life Sciences Tools & Services	0.0%
Personal Care Products	3.5%
Tobacco	8.4%
Other Assets and Liabilities—Net	0.1%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012216

Shareholder Report [Line Items]

Fund Name

Consumer Staples Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VCSAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Consumer Staples Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[14]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 9,866,000,000

Holdings Count | Holding

107

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$9,866
Number of Portfolio Holdings	107
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Beverages	19.4%
Consumer Staples Distribution & Retail	38.4%
Food Products	14.1%
Household Products	16.1%
Life Sciences Tools & Services	0.0%
Personal Care Products	3.5%
Tobacco	8.4%
Other Assets and Liabilities—Net	0.1%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012219

Shareholder Report [Line Items]

Fund Name

Energy Index Fund

Class Name

ETF Shares

Trading Symbol

VDE

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Energy Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[15]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 11,325,000,000

Holdings Count | Holding

110

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$11,325
Number of Portfolio Holdings	110
Portfolio Turnover Rate	3%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Coal & Consumable Fuels	0.9%
Integrated Oil & Gas	39.0%
Oil & Gas Drilling	1.4%
Oil & Gas Equipment & Services	11.1%
Oil & Gas Exploration & Production	22.4%
Oil & Gas Refining & Marketing	9.3%
Oil & Gas Storage & Transportation	15.2%
Other Assets and Liabilities—Net	0.7%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012218

Shareholder Report [Line Items]

Fund Name

Energy Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VENAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Energy Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[16]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 11,325,000,000

Holdings Count | Holding

110

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$11,325
Number of Portfolio Holdings	110
Portfolio Turnover Rate	3%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Coal & Consumable Fuels	0.9%
Integrated Oil & Gas	39.0%
Oil & Gas Drilling	1.4%
Oil & Gas Equipment & Services	11.1%
Oil & Gas Exploration & Production	22.4%
Oil & Gas Refining & Marketing	9.3%
Oil & Gas Storage & Transportation	15.2%
Other Assets and Liabilities—Net	0.7%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012221

Shareholder Report [Line Items]

Fund Name

Financials Index Fund

Class Name

ETF Shares

Trading Symbol

VFH

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Financials Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$4	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[17]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 13,887,000,000

Holdings Count | Holding

423

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$13,887
Number of Portfolio Holdings	423
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Banks	28.7%
Capital Markets	24.9%
Consumer Finance	4.8%
Financial Services	22.4%
Insurance	15.0%
Mortgage Real Estate Investment Trusts (REITs)	0.8%
Other Assets and Liabilities—Net	3.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012220

Shareholder Report [Line Items]

Fund Name

Financials Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VFAIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Financials Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$4	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[18]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 13,887,000,000

Holdings Count | Holding

423

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$13,887
Number of Portfolio Holdings	423
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Banks	28.7%
Capital Markets	24.9%
Consumer Finance	4.8%
Financial Services	22.4%
Insurance	15.0%
Mortgage Real Estate Investment Trusts (REITs)	0.8%
Other Assets and Liabilities—Net	3.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012223

Shareholder Report [Line Items]

Fund Name

Health Care Index Fund

Class Name

ETF Shares

Trading Symbol

VHT

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Health Care Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[19]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 20,252,000,000

Holdings Count | Holding

415

InvestmentCompanyPortfolioTurnover

4.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$20,252
Number of Portfolio Holdings	415
Portfolio Turnover Rate	4%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Biotechnology	22.8%
Health Care Equipment & Supplies	18.9%
Health Care Providers & Services	16.3%
Health Care Technology	0.6%
Life Sciences Tools & Services	8.5%
Other	0.0%
Pharmaceuticals	32.7%
Other Assets and Liabilities—Net	0.2%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012222

Shareholder Report [Line Items]

Fund Name

Health Care Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VHCIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Health Care Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[20]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 20,252,000,000

Holdings Count | Holding

415

InvestmentCompanyPortfolioTurnover

4.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$20,252
Number of Portfolio Holdings	415
Portfolio Turnover Rate	4%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Biotechnology	22.8%
Health Care Equipment & Supplies	18.9%
Health Care Providers & Services	16.3%
Health Care Technology	0.6%
Life Sciences Tools & Services	8.5%
Other	0.0%
Pharmaceuticals	32.7%
Other Assets and Liabilities—Net	0.2%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012225

Shareholder Report [Line Items]

Fund Name

Industrials Index Fund

Class Name

ETF Shares

Trading Symbol

VIS

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Industrials Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[21]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 8,128,000,000

Holdings Count | Holding

389

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$8,128
Number of Portfolio Holdings	389
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Aerospace & Defense	24.1%
Air Freight & Logistics	3.2%
Building Products	6.1%
Commercial Services & Supplies	5.8%
Construction & Engineering	4.5%
Electrical Equipment	11.9%
Ground Transportation	8.0%
Industrial Conglomerates	3.4%
Machinery	20.6%
Marine Transportation	0.2%
Passenger Airlines	1.8%
Professional Services	5.4%
Trading Companies & Distributors	4.6%
Other Assets and Liabilities—Net	0.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012224

Shareholder Report [Line Items]

Fund Name

Industrials Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VINAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Industrials Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[22]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 8,128,000,000

Holdings Count | Holding

389

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$8,128
Number of Portfolio Holdings	389
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Aerospace & Defense	24.1%
Air Freight & Logistics	3.2%
Building Products	6.1%
Commercial Services & Supplies	5.8%
Construction & Engineering	4.5%
Electrical Equipment	11.9%
Ground Transportation	8.0%
Industrial Conglomerates	3.4%
Machinery	20.6%
Marine Transportation	0.2%
Passenger Airlines	1.8%
Professional Services	5.4%
Trading Companies & Distributors	4.6%
Other Assets and Liabilities—Net	0.4%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012227

Shareholder Report [Line Items]

Fund Name

Information Technology Index Fund

Class Name

ETF Shares

Trading Symbol

VGT

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Information Technology Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[23]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 126,509,000,000

Holdings Count | Holding

322

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$126,509
Number of Portfolio Holdings	322
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Communications Equipment	4.3%
Electronic Equipment, Instruments & Components	6.3%
IT Services	4.3%
Other	0.0%
Semiconductors & Semiconductor Equipment	40.1%
Software	26.1%
Technology Hardware, Storage & Peripherals	18.8%
Other Assets and Liabilities—Net	0.1%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012226

Shareholder Report [Line Items]

Fund Name

Information Technology Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VITAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Information Technology Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[24]

0.09%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 126,509,000,000

Holdings Count | Holding

322

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$126,509
Number of Portfolio Holdings	322
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Communications Equipment	4.3%
Electronic Equipment, Instruments & Components	6.3%
IT Services	4.3%
Other	0.0%
Semiconductors & Semiconductor Equipment	40.1%
Software	26.1%
Technology Hardware, Storage & Peripherals	18.8%
Other Assets and Liabilities—Net	0.1%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012228

Shareholder Report [Line Items]

Fund Name

International Growth Fund

Class Name

Investor Shares

Trading Symbol

VWIGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard International Growth Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$18	0.36%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 18

Expense Ratio, Percent

^[25]

0.36%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 44,950,000,000

Holdings Count | Holding

127

InvestmentCompanyPortfolioTurnover

10.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$44,950
Number of Portfolio Holdings	127
Portfolio Turnover Rate	10%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Asia	40.3%
Europe	46.4%
North America	8.3%
Oceania	0.6%
South America	2.4%
Other Assets and Liabilities—Net	2.0%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Material Fund Change Adviser [Text Block]

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000012229

Shareholder Report [Line Items]

Fund Name

International Growth Fund

Class Name

Admiral™ Shares

Trading Symbol

VWILX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard International Growth Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$12	0.24%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 12

Expense Ratio, Percent

^[26]

0.24%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 44,950,000,000

Holdings Count | Holding

127

InvestmentCompanyPortfolioTurnover

10.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$44,950
Number of Portfolio Holdings	127
Portfolio Turnover Rate	10%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Asia	40.3%
Europe	46.4%
North America	8.3%
Oceania	0.6%
South America	2.4%
Other Assets and Liabilities—Net	2.0%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Material Fund Change Adviser [Text Block]

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000055210

Shareholder Report [Line Items]

Fund Name

Mega Cap Index Fund

Class Name

ETF Shares

Trading Symbol

MGC

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Mega Cap Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$4	0.07%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[27]

0.07%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 10,336,000,000

Holdings Count | Holding

183

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$10,336
Number of Portfolio Holdings	183
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Basic Materials	1.0%
Consumer Discretionary	13.6%
Consumer Staples	3.7%
Energy	2.7%
Financials	9.6%
Health Care	9.8%
Industrials	9.9%
Real Estate	1.0%
Technology	44.9%
Telecommunications	2.1%
Utilities	1.4%
Other Assets and Liabilities—Net	0.3%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000055209

Shareholder Report [Line Items]

Fund Name

Mega Cap Index Fund

Class Name

Institutional Shares

Trading Symbol

VMCTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Mega Cap Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares	$3	0.06%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 3

Expense Ratio, Percent

^[28]

0.06%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 10,336,000,000

Holdings Count | Holding

183

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$10,336
Number of Portfolio Holdings	183
Portfolio Turnover Rate	2%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Basic Materials	1.0%
Consumer Discretionary	13.6%
Consumer Staples	3.7%
Energy	2.7%
Financials	9.6%
Health Care	9.8%
Industrials	9.9%
Real Estate	1.0%
Technology	44.9%
Telecommunications	2.1%
Utilities	1.4%
Other Assets and Liabilities—Net	0.3%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000055213

Shareholder Report [Line Items]

Fund Name

Mega Cap Value Index Fund

Class Name

ETF Shares

Trading Symbol

MGV

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Mega Cap Value Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$4	0.07%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[29]

0.07%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 11,987,000,000

Holdings Count | Holding

132

InvestmentCompanyPortfolioTurnover

7.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$11,987
Number of Portfolio Holdings	132
Portfolio Turnover Rate	7%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Basic Materials	2.0%
Consumer Discretionary	10.1%
Consumer Staples	8.5%
Energy	6.4%
Financials	22.0%
Health Care	16.9%
Industrials	16.2%
Real Estate	1.0%
Technology	8.8%
Telecommunications	4.2%
Utilities	3.2%
Other Assets and Liabilities—Net	0.7%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000055212

Shareholder Report [Line Items]

Fund Name

Mega Cap Value Index Fund

Class Name

Institutional Shares

Trading Symbol

VMVLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Mega Cap Value Index Fund (the "Fund") for the period of September 1, 2025, to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature. You can also request this information by contacting us at 800-662-7447.

Material Fund Change Notice [Text Block]

The report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares	$3	0.06%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 3

Expense Ratio, Percent

^[30]

0.06%

Material Change Date

Aug. 31, 2025

AssetsNet

$ 11,987,000,000

Holdings Count | Holding

132

InvestmentCompanyPortfolioTurnover

7.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of February 28, 2026)

Table Summary
Fund Net Assets (in millions)	$11,987
Number of Portfolio Holdings	132
Portfolio Turnover Rate	7%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of February 28, 2026)

Table Summary
Basic Materials	2.0%
Consumer Discretionary	10.1%
Consumer Staples	8.5%
Energy	6.4%
Financials	22.0%
Health Care	16.9%
Industrials	16.2%
Real Estate	1.0%
Technology	8.8%
Telecommunications	4.2%
Utilities	3.2%
Other Assets and Liabilities—Net	0.7%

This table reflects the Fund's investments, including short-term investments, derivatives and other assets and liabilities.

Material Fund Change [Text Block]

How has the Fund changed?

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Portfolio Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

[1]	Annualized.
[2]	Annualized.
[3]	Annualized.
[4]	Annualized.
[5]	Annualized.
[6]	Annualized.
[7]	Annualized.
[8]	Annualized.
[9]	Annualized.
[10]	Annualized.
[11]	Annualized.
[12]	Annualized.
[13]	Annualized.
[14]	Annualized.
[15]	Annualized.
[16]	Annualized.
[17]	Annualized.
[18]	Annualized.
[19]	Annualized.
[20]	Annualized.
[21]	Annualized.
[22]	Annualized.
[23]	Annualized.
[24]	Annualized.
[25]	Annualized.
[26]	Annualized.
[27]	Annualized.
[28]	Annualized.
[29]	Annualized.
[30]	Annualized.