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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2013
Registrant Name dei_EntityRegistrantName Vanguard Windsor Funds
Central Index Key dei_EntityCentralIndexKey 0000107606
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Feb. 26, 2014
Document Effective Date dei_DocumentEffectiveDate Feb. 26, 2014
Vanguard Windsor Fund | Participant
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Feb. 26, 2014
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation and income.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 40%.
PortfolioTurnover, Rate rr_PortfolioTurnoverRate 40.00%
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund invests mainly in large- and mid-capitalization companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that the advisor feels are trading at prices that are below average in relation to measures such as earnings and book value. The Fund uses multiple investment advisors.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:

Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.

Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investment in the financial sector subjects the Fund to proportionately higher exposure to the risks of this sector.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.

Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Investor Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees or expenses)
Vanguard Windsor Fund | Participant:
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Feb. 26, 2014
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation and income.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 40%.
PortfolioTurnover, Rate rr_PortfolioTurnoverRate 40.00%
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund invests mainly in large- and mid-capitalization companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that the advisor feels are trading at prices that are below average in relation to measures such as earnings and book value. The Fund uses multiple investment advisors.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:

Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.

Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investment in the financial sector subjects the Fund to proportionately higher exposure to the risks of this sector.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.
Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Windsor Fund Admiral Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 19.01% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -20.54% (quarter ended December 31, 2008 ).
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended September 30, 2009 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended December 31, 2008 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2013
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees or expenses)
Vanguard Windsor Fund | Retail
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Feb. 26, 2014
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation and income.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Investor Shares or Admiral Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 40%.
PortfolioTurnover, Rate rr_PortfolioTurnoverRate 40.00%
EXAMPLE rr_ExpenseExampleHeading

Examples
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following examples are intended to help you compare the cost of investing in the Fund's Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund invests mainly in large- and mid-capitalization companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that the advisor feels are trading at prices that are below average in relation to measures such as earnings and book value. The Fund uses multiple investment advisors.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:

Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.

Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investment in the financial sector subjects the Fund to proportionately higher exposure to the risks of this sector.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.

Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Windsor Fund Investor Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 18.93% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -20.60% (quarter ended December 31, 2008 ).
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended September 30, 2009 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended December 31, 2008 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2013
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate

When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.

One Class of After-Tax Shown rr_PerformanceTableOneClassOfAfterTaxShown

Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class.

Performance Table Explains why after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher

Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Performance Table Closing rr_PerformanceTableClosingTextBlock

Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Vanguard Windsor Fund | Vanguard Windsor Fund - Investor Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther none
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for certain fund account balances below $10,000) rr_MaximumAccountFee 20
Management Fees rr_ManagementFeesOverAssets 0.35%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.37%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 38
3 YEAR rr_ExpenseExampleNoRedemptionYear03 119
5 YEAR rr_ExpenseExampleNoRedemptionYear05 208
10 YEAR rr_ExpenseExampleNoRedemptionYear10 468
Annual Return Inception Date rr_AnnualReturnInceptionDate Oct. 23, 1958
2004 rr_AnnualReturn2004 13.38%
2005 rr_AnnualReturn2005 4.99%
2006 rr_AnnualReturn2006 19.35%
2007 rr_AnnualReturn2007 (3.30%)
2008 rr_AnnualReturn2008 (41.10%)
2009 rr_AnnualReturn2009 34.69%
2010 rr_AnnualReturn2010 14.82%
2011 rr_AnnualReturn2011 (4.00%)
2012 rr_AnnualReturn2012 20.78%
2013 rr_AnnualReturn2013 36.08%
Bar Chart Highest Quarterly Return Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Bar Chart Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.93%
Bar Chart Lowest Quarter Return Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Bar Chart Lowest Quarter Return rr_BarChartLowestQuarterlyReturn (20.60%)
One Year rr_AverageAnnualReturnYear01 36.08%
Five Years rr_AverageAnnualReturnYear05 19.53%
Ten Years rr_AverageAnnualReturnYear10 7.04%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 23, 1958
Vanguard Windsor Fund | Vanguard Windsor Fund - Admiral Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther none
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for certain fund account balances below $10,000) rr_MaximumAccountFee 20
Management Fees rr_ManagementFeesOverAssets 0.26%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.27%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 28
3 YEAR rr_ExpenseExampleNoRedemptionYear03 87
5 YEAR rr_ExpenseExampleNoRedemptionYear05 152
10 YEAR rr_ExpenseExampleNoRedemptionYear10 343
Annual Return Inception Date rr_AnnualReturnInceptionDate Nov. 12, 2001
2004 rr_AnnualReturn2004 13.52%
2005 rr_AnnualReturn2005 5.12%
2006 rr_AnnualReturn2006 19.44%
2007 rr_AnnualReturn2007 (3.14%)
2008 rr_AnnualReturn2008 (41.04%)
2009 rr_AnnualReturn2009 34.89%
2010 rr_AnnualReturn2010 14.91%
2011 rr_AnnualReturn2011 (3.95%)
2012 rr_AnnualReturn2012 20.94%
2013 rr_AnnualReturn2013 36.23%
Bar Chart Highest Quarterly Return Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Bar Chart Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 19.01%
Bar Chart Lowest Quarter Return Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Bar Chart Lowest Quarter Return rr_BarChartLowestQuarterlyReturn (20.54%)
One Year rr_AverageAnnualReturnYear01 36.23%
Five Years rr_AverageAnnualReturnYear05 19.66%
Ten Years rr_AverageAnnualReturnYear10 7.16%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 12, 2001
Vanguard Windsor II Fund | Participant
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Feb. 26, 2014
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation and income.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 27%.
PortfolioTurnover, Rate rr_PortfolioTurnoverRate 27.00%
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund invests mainly in large- and mid-capitalization companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that the advisor feels are trading at prices that are below average in relation to measures such as earnings and book value. These stocks often have above-average dividend yields. The Fund uses multiple investment advisors.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:

Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.

Asset concentration risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks. The Fund tends to invest a high percentage of assets in its ten largest holdings.

Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investment in the financial sector subjects the Fund to proportionately higher exposure to the risks of this sector.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Additional Market Index rr_PerformanceAdditionalMarketIndex

, which have investment characteristics similar to those of the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.
Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Windsor II Fund Investor Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Investor Shares compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 17.78% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -21.62% (quarter ended December 31, 2008 ).
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended June 30, 2009 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended December 31, 2008 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2013
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflect no deduction for fees or expenses)
Vanguard Windsor II Fund | Participant:
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Feb. 26, 2014
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation and income.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 27%.
PortfolioTurnover, Rate rr_PortfolioTurnoverRate 27.00%
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund invests mainly in large- and mid-capitalization companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that the advisor feels are trading at prices that are below average in relation to measures such as earnings and book value. These stocks often have above-average dividend yields. The Fund uses multiple investment advisors.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:

Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.

Asset concentration risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks. The Fund tends to invest a high percentage of assets in its ten largest holdings.

Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investment in the financial sector subjects the Fund to proportionately higher exposure to the risks of this sector.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Additional Market Index rr_PerformanceAdditionalMarketIndex

, which have investment characteristics similar to those of the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.
Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Windsor II Fund Admiral Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 17.81% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -21.58% (quarter ended December 31, 2008 ).
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended June 30, 2009 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended December 31, 2008 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2013
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflect no deduction for fees or expenses)
Vanguard Windsor II Fund | Retail
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Feb. 26, 2014
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation and income.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Investor Shares or Admiral Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 27%.
PortfolioTurnover, Rate rr_PortfolioTurnoverRate 27.00%
EXAMPLE rr_ExpenseExampleHeading

Examples
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following examples are intended to help you compare the cost of investing in the Fund's Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund invests mainly in large- and mid-capitalization companies whose stocks are considered by an advisor to be undervalued. Undervalued stocks are generally those that are out of favor with investors and that the advisor feels are trading at prices that are below average in relation to measures such as earnings and book value. These stocks often have above-average dividend yields. The Fund uses multiple investment advisors.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:

Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.

Asset concentration risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks. The Fund tends to invest a high percentage of assets in its ten largest holdings.

Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investment in the financial sector subjects the Fund to proportionately higher exposure to the risks of this sector.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Additional Market Index rr_PerformanceAdditionalMarketIndex

, which have investment characteristics similar to those of the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.

Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Windsor II Fund Investor Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 17.78% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -21.62% (quarter ended December 31, 2008 ).
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended June 30, 2009 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended December 31, 2008 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2013
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflect no deduction for fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate

When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.

One Class of After-Tax Shown rr_PerformanceTableOneClassOfAfterTaxShown

Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class.

Performance Table Explains why after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher

Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Performance Table Closing rr_PerformanceTableClosingTextBlock

Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Vanguard Windsor II Fund | Vanguard Windsor II Fund - Investor Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther none
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for certain fund account balances below $10,000) rr_MaximumAccountFee 20
Management Fees rr_ManagementFeesOverAssets 0.34%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.36%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 37
3 YEAR rr_ExpenseExampleNoRedemptionYear03 116
5 YEAR rr_ExpenseExampleNoRedemptionYear05 202
10 YEAR rr_ExpenseExampleNoRedemptionYear10 456
Annual Return Inception Date rr_AnnualReturnInceptionDate Jun. 24, 1985
2004 rr_AnnualReturn2004 18.31%
2005 rr_AnnualReturn2005 7.01%
2006 rr_AnnualReturn2006 18.25%
2007 rr_AnnualReturn2007 2.23%
2008 rr_AnnualReturn2008 (36.70%)
2009 rr_AnnualReturn2009 27.05%
2010 rr_AnnualReturn2010 10.62%
2011 rr_AnnualReturn2011 2.70%
2012 rr_AnnualReturn2012 16.72%
2013 rr_AnnualReturn2013 30.69%
Bar Chart Highest Quarterly Return Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Bar Chart Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.78%
Bar Chart Lowest Quarter Return Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Bar Chart Lowest Quarter Return rr_BarChartLowestQuarterlyReturn (21.62%)
One Year rr_AverageAnnualReturnYear01 30.69%
Five Years rr_AverageAnnualReturnYear05 17.10%
Ten Years rr_AverageAnnualReturnYear10 7.87%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 24, 1985
Vanguard Windsor II Fund | Vanguard Windsor II Fund - Admiral Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther none
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for certain fund account balances below $10,000) rr_MaximumAccountFee 20
Management Fees rr_ManagementFeesOverAssets 0.26%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.28%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 29
3 YEAR rr_ExpenseExampleNoRedemptionYear03 90
5 YEAR rr_ExpenseExampleNoRedemptionYear05 157
10 YEAR rr_ExpenseExampleNoRedemptionYear10 356
Annual Return Inception Date rr_AnnualReturnInceptionDate May 14, 2001
2004 rr_AnnualReturn2004 18.44%
2005 rr_AnnualReturn2005 7.15%
2006 rr_AnnualReturn2006 18.37%
2007 rr_AnnualReturn2007 2.32%
2008 rr_AnnualReturn2008 (36.63%)
2009 rr_AnnualReturn2009 27.17%
2010 rr_AnnualReturn2010 10.70%
2011 rr_AnnualReturn2011 2.78%
2012 rr_AnnualReturn2012 16.80%
2013 rr_AnnualReturn2013 30.80%
Bar Chart Highest Quarterly Return Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Bar Chart Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.81%
Bar Chart Lowest Quarter Return Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Bar Chart Lowest Quarter Return rr_BarChartLowestQuarterlyReturn (21.58%)
One Year rr_AverageAnnualReturnYear01 30.80%
Five Years rr_AverageAnnualReturnYear05 17.19%
Ten Years rr_AverageAnnualReturnYear10 7.97%
Inception Date rr_AverageAnnualReturnInceptionDate May 14, 2001
Standard & Poor's 500 Index | Vanguard Windsor II Fund | Vanguard Windsor II Fund - Investor Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 32.39%
Five Years rr_AverageAnnualReturnYear05 17.94%
Ten Years rr_AverageAnnualReturnYear10 7.41%
Standard & Poor's 500 Index | Vanguard Windsor II Fund | Vanguard Windsor II Fund - Admiral Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 32.39%
Five Years rr_AverageAnnualReturnYear05 17.94%
Ten Years rr_AverageAnnualReturnYear10 7.41%
Russell 1000 Value Index | Vanguard Windsor Fund | Vanguard Windsor Fund - Investor Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 32.53%
Five Years rr_AverageAnnualReturnYear05 16.67%
Ten Years rr_AverageAnnualReturnYear10 7.58%
Russell 1000 Value Index | Vanguard Windsor Fund | Vanguard Windsor Fund - Admiral Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 32.53%
Five Years rr_AverageAnnualReturnYear05 16.67%
Ten Years rr_AverageAnnualReturnYear10 7.58%
Russell 1000 Value Index | Vanguard Windsor II Fund | Vanguard Windsor II Fund - Investor Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 32.53%
Five Years rr_AverageAnnualReturnYear05 16.67%
Ten Years rr_AverageAnnualReturnYear10 7.58%
Russell 1000 Value Index | Vanguard Windsor II Fund | Vanguard Windsor II Fund - Admiral Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 32.53%
Five Years rr_AverageAnnualReturnYear05 16.67%
Ten Years rr_AverageAnnualReturnYear10 7.58%