This semi-annual shareholder report contains important information about Vanguard Windsor™ Fund (the "Fund") for the period of November 1, 2025, to April 30, 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
Investor Shares	$15	0.29%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 15

Expense Ratio, Percent

^[1]

0.29%

Material Change Date

Oct. 31, 2025

AssetsNet

$ 24,245,000,000

Holdings Count | Holding

141

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of April 30, 2026)

Table Summary
Fund Net Assets (in millions)	$24,245
Number of Portfolio Holdings	141
Portfolio Turnover Rate	27%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of April 30, 2026)

Table Summary
Communication Services	4.5%
Consumer Discretionary	9.2%
Consumer Staples	6.4%
Energy	7.2%
Financials	20.2%
Health Care	15.6%
Industrials	11.4%
Information Technology	12.6%
Materials	4.7%
Real Estate	3.3%
Utilities	2.4%
Other Assets and Liabilities—Net	2.5%

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 through its wholly-owned subsidiaries, Vanguard Capital Management, LLC and Vanguard Portfolio Management, LLC.

This is a summary of certain changes to the Fund since October 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]

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

C000012179

Shareholder Report [Line Items]

Fund Name

Windsor™ Fund

Class Name

Admiral™ Shares

Trading Symbol

VWNEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Windsor™ Fund (the "Fund") for the period of November 1, 2025, to April 30, 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	$9	0.18%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 9

Expense Ratio, Percent

^[2]

0.18%

Material Change Date

Oct. 31, 2025

AssetsNet

$ 24,245,000,000

Holdings Count | Holding

141

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of April 30, 2026)

Table Summary
Fund Net Assets (in millions)	$24,245
Number of Portfolio Holdings	141
Portfolio Turnover Rate	27%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of April 30, 2026)

Table Summary
Communication Services	4.5%
Consumer Discretionary	9.2%
Consumer Staples	6.4%
Energy	7.2%
Financials	20.2%
Health Care	15.6%
Industrials	11.4%
Information Technology	12.6%
Materials	4.7%
Real Estate	3.3%
Utilities	2.4%
Other Assets and Liabilities—Net	2.5%

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?

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

C000012180

Shareholder Report [Line Items]

Fund Name

Windsor™ II Fund

Class Name

Investor Shares

Trading Symbol

VWNFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Windsor™ II Fund (the "Fund") for the period of November 1, 2025, to April 30, 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	$17	0.33%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 17

Expense Ratio, Percent

^[3]

0.33%

Material Change Date

Oct. 31, 2025

AssetsNet

$ 64,938,000,000

Holdings Count | Holding

181

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of April 30, 2026)

Table Summary
Fund Net Assets (in millions)	$64,938
Number of Portfolio Holdings	181
Portfolio Turnover Rate	35%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of April 30, 2026)

Table Summary
Communication Services	8.7%
Consumer Discretionary	7.5%
Consumer Staples	5.4%
Energy	6.0%
Financials	19.5%
Health Care	12.5%
Industrials	10.2%
Information Technology	19.3%
Materials	4.4%
Other	0.4%
Real Estate	0.5%
Utilities	2.1%
Other Assets and Liabilities—Net	3.5%

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?

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

C000012181

Shareholder Report [Line Items]

Fund Name

Windsor™ II Fund

Class Name

Admiral™ Shares

Trading Symbol

VWNAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard Windsor™ II Fund (the "Fund") for the period of November 1, 2025, to April 30, 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

^[4]

0.24%

Material Change Date

Oct. 31, 2025

AssetsNet

$ 64,938,000,000

Holdings Count | Holding

181

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of April 30, 2026)

Table Summary
Fund Net Assets (in millions)	$64,938
Number of Portfolio Holdings	181
Portfolio Turnover Rate	35%

Holdings [Text Block]

Portfolio Composition % of Net Assets (as of April 30, 2026)

Table Summary
Communication Services	8.7%
Consumer Discretionary	7.5%
Consumer Staples	5.4%
Energy	6.0%
Financials	19.5%
Health Care	12.5%
Industrials	10.2%
Information Technology	19.3%
Materials	4.4%
Other	0.4%
Real Estate	0.5%
Utilities	2.1%
Other Assets and Liabilities—Net	3.5%

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?

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

[1]	Annualized.
[2]	Annualized.
[3]	Annualized.
[4]	Annualized.