This semi-annual shareholder report contains important information about Vanguard 500 Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$7	0.14%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 7

Expense Ratio, Percent

0.14%

^[1]

AssetsNet

$ 1,490,277,000,000

Holdings Count | Holding

540

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$1,490,277
Number of Portfolio Holdings	540
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Communication Services	9.8%
Consumer Discretionary	10.4%
Consumer Staples	5.5%
Energy	3.0%
Financials	13.9%
Health Care	9.3%
Industrials	8.6%
Information Technology	33.1%
Materials	1.9%
Real Estate	2.0%
Utilities	2.4%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000092055

Shareholder Report [Line Items]

Fund Name

500 Index Fund

Class Name

ETF Shares

Trading Symbol

VOO

Security Exchange Name

NYSEArca

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard 500 Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$2	0.03%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.03%

^[2]

AssetsNet

$ 1,490,277,000,000

Holdings Count | Holding

540

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$1,490,277
Number of Portfolio Holdings	540
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Communication Services	9.8%
Consumer Discretionary	10.4%
Consumer Staples	5.5%
Energy	3.0%
Financials	13.9%
Health Care	9.3%
Industrials	8.6%
Information Technology	33.1%
Materials	1.9%
Real Estate	2.0%
Utilities	2.4%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007774

Shareholder Report [Line Items]

Fund Name

500 Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VFIAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard 500 Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[3]

AssetsNet

$ 1,490,277,000,000

Holdings Count | Holding

540

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$1,490,277
Number of Portfolio Holdings	540
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Communication Services	9.8%
Consumer Discretionary	10.4%
Consumer Staples	5.5%
Energy	3.0%
Financials	13.9%
Health Care	9.3%
Industrials	8.6%
Information Technology	33.1%
Materials	1.9%
Real Estate	2.0%
Utilities	2.4%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000170274

Shareholder Report [Line Items]

Fund Name

500 Index Fund

Class Name

Institutional Select Shares

Trading Symbol

VFFSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard 500 Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Select Shares	$1	0.01%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 1

Expense Ratio, Percent

0.01%

^[4]

AssetsNet

$ 1,490,277,000,000

Holdings Count | Holding

540

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$1,490,277
Number of Portfolio Holdings	540
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Communication Services	9.8%
Consumer Discretionary	10.4%
Consumer Staples	5.5%
Energy	3.0%
Financials	13.9%
Health Care	9.3%
Industrials	8.6%
Information Technology	33.1%
Materials	1.9%
Real Estate	2.0%
Utilities	2.4%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007775

Shareholder Report [Line Items]

Fund Name

Value Index Fund

Class Name

Investor Shares

Trading Symbol

VIVAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Value Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$9	0.17%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 9

Expense Ratio, Percent

0.17%

^[5]

AssetsNet

$ 195,517,000,000

Holdings Count | Holding

353

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$195,517
Number of Portfolio Holdings	353
Portfolio Turnover Rate	3%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	2.4%
Consumer Discretionary	8.9%
Consumer Staples	9.3%
Energy	6.5%
Financials	22.8%
Health Care	13.9%
Industrials	16.2%
Real Estate	2.9%
Technology	7.2%
Telecommunications	3.7%
Utilities	5.9%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007778

Shareholder Report [Line Items]

Fund Name

Value Index Fund

Class Name

ETF Shares

Trading Symbol

VTV

Security Exchange Name

NYSE

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Value Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[6]

AssetsNet

$ 195,517,000,000

Holdings Count | Holding

353

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$195,517
Number of Portfolio Holdings	353
Portfolio Turnover Rate	3%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	2.4%
Consumer Discretionary	8.9%
Consumer Staples	9.3%
Energy	6.5%
Financials	22.8%
Health Care	13.9%
Industrials	16.2%
Real Estate	2.9%
Technology	7.2%
Telecommunications	3.7%
Utilities	5.9%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007776

Shareholder Report [Line Items]

Fund Name

Value Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VVIAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Value Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$3	0.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 3

Expense Ratio, Percent

0.05%

^[7]

AssetsNet

$ 195,517,000,000

Holdings Count | Holding

353

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$195,517
Number of Portfolio Holdings	353
Portfolio Turnover Rate	3%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	2.4%
Consumer Discretionary	8.9%
Consumer Staples	9.3%
Energy	6.5%
Financials	22.8%
Health Care	13.9%
Industrials	16.2%
Real Estate	2.9%
Technology	7.2%
Telecommunications	3.7%
Utilities	5.9%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007777

Shareholder Report [Line Items]

Fund Name

Value Index Fund

Class Name

Institutional Shares

Trading Symbol

VIVIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Value Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[8]

AssetsNet

$ 195,517,000,000

Holdings Count | Holding

353

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$195,517
Number of Portfolio Holdings	353
Portfolio Turnover Rate	3%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	2.4%
Consumer Discretionary	8.9%
Consumer Staples	9.3%
Energy	6.5%
Financials	22.8%
Health Care	13.9%
Industrials	16.2%
Real Estate	2.9%
Technology	7.2%
Telecommunications	3.7%
Utilities	5.9%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007783

Shareholder Report [Line Items]

Fund Name

Growth Index Fund

Class Name

Investor Shares

Trading Symbol

VIGRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Growth Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$9	0.17%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 9

Expense Ratio, Percent

0.17%

^[9]

AssetsNet

$ 311,870,000,000

Holdings Count | Holding

169

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$311,870
Number of Portfolio Holdings	169
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	0.4%
Consumer Discretionary	18.8%
Consumer Staples	0.2%
Energy	0.6%
Financials	2.9%
Health Care	5.4%
Industrials	8.9%
Real Estate	1.3%
Technology	60.4%
Telecommunications	0.8%
Utilities	0.2%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007786

Shareholder Report [Line Items]

Fund Name

Growth Index Fund

Class Name

ETF Shares

Trading Symbol

VUG

Security Exchange Name

NYSE

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Growth Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[10]

AssetsNet

$ 311,870,000,000

Holdings Count | Holding

169

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$311,870
Number of Portfolio Holdings	169
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	0.4%
Consumer Discretionary	18.8%
Consumer Staples	0.2%
Energy	0.6%
Financials	2.9%
Health Care	5.4%
Industrials	8.9%
Real Estate	1.3%
Technology	60.4%
Telecommunications	0.8%
Utilities	0.2%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007784

Shareholder Report [Line Items]

Fund Name

Growth Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VIGAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Growth Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$3	0.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 3

Expense Ratio, Percent

0.05%

^[11]

AssetsNet

$ 311,870,000,000

Holdings Count | Holding

169

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$311,870
Number of Portfolio Holdings	169
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	0.4%
Consumer Discretionary	18.8%
Consumer Staples	0.2%
Energy	0.6%
Financials	2.9%
Health Care	5.4%
Industrials	8.9%
Real Estate	1.3%
Technology	60.4%
Telecommunications	0.8%
Utilities	0.2%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007785

Shareholder Report [Line Items]

Fund Name

Growth Index Fund

Class Name

Institutional Shares

Trading Symbol

VIGIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Growth Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[12]

AssetsNet

$ 311,870,000,000

Holdings Count | Holding

169

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$311,870
Number of Portfolio Holdings	169
Portfolio Turnover Rate	5%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	0.4%
Consumer Discretionary	18.8%
Consumer Staples	0.2%
Energy	0.6%
Financials	2.9%
Health Care	5.4%
Industrials	8.9%
Real Estate	1.3%
Technology	60.4%
Telecommunications	0.8%
Utilities	0.2%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007787

Shareholder Report [Line Items]

Fund Name

Large-Cap Index Fund

Class Name

Investor Shares

Trading Symbol

VLACX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Large-Cap Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$9	0.17%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 9

Expense Ratio, Percent

0.17%

^[13]

AssetsNet

$ 61,238,000,000

Holdings Count | Holding

472

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$61,238
Number of Portfolio Holdings	472
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	1.2%
Consumer Discretionary	14.6%
Consumer Staples	4.0%
Energy	3.0%
Financials	11.2%
Health Care	8.8%
Industrials	11.6%
Real Estate	1.9%
Technology	38.8%
Telecommunications	2.1%
Utilities	2.6%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007790

Shareholder Report [Line Items]

Fund Name

Large-Cap Index Fund

Class Name

ETF Shares

Trading Symbol

Security Exchange Name

NYSE

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Large-Cap Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[14]

AssetsNet

$ 61,238,000,000

Holdings Count | Holding

472

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$61,238
Number of Portfolio Holdings	472
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	1.2%
Consumer Discretionary	14.6%
Consumer Staples	4.0%
Energy	3.0%
Financials	11.2%
Health Care	8.8%
Industrials	11.6%
Real Estate	1.9%
Technology	38.8%
Telecommunications	2.1%
Utilities	2.6%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007788

Shareholder Report [Line Items]

Fund Name

Large-Cap Index Fund

Class Name

Admiral™ Shares

Trading Symbol

VLCAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Large-Cap Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$3	0.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 3

Expense Ratio, Percent

0.05%

^[15]

AssetsNet

$ 61,238,000,000

Holdings Count | Holding

472

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$61,238
Number of Portfolio Holdings	472
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	1.2%
Consumer Discretionary	14.6%
Consumer Staples	4.0%
Energy	3.0%
Financials	11.2%
Health Care	8.8%
Industrials	11.6%
Real Estate	1.9%
Technology	38.8%
Telecommunications	2.1%
Utilities	2.6%
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]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

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

C000007789

Shareholder Report [Line Items]

Fund Name

Large-Cap Index Fund

Class Name

Institutional Shares

Trading Symbol

VLISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Large-Cap Index Fund (the "Fund") for the period of January 1, 2025, to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

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.

Additional Information Phone Number

800-662-7447

Additional Information Website

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

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares	$2	0.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 2

Expense Ratio, Percent

0.04%

^[16]

AssetsNet

$ 61,238,000,000

Holdings Count | Holding

472

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of June 30, 2025)

Fund Net Assets (in millions)	$61,238
Number of Portfolio Holdings	472
Portfolio Turnover Rate	1%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of June 30, 2025)

Basic Materials	1.2%
Consumer Discretionary	14.6%
Consumer Staples	4.0%
Energy	3.0%
Financials	11.2%
Health Care	8.8%
Industrials	11.6%
Real Estate	1.9%
Technology	38.8%
Telecommunications	2.1%
Utilities	2.6%
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]

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.
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[10]	Annualized.
[11]	Annualized.
[12]	Annualized.
[13]	Annualized.
[14]	Annualized.
[15]	Annualized.
[16]	Annualized.