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Average Annual Total Returns (Vanguard Windsor Fund Participant)
Vanguard Windsor Fund
Vanguard Windsor Fund - Investor Shares
11/1/2013 - 10/31/2014
Russell 1000 Value Index
Vanguard Windsor Fund
Vanguard Windsor Fund - Investor Shares
11/1/2013 - 10/31/2014
Average Annual Returns for Periods Ended December 31, 2014    
One Year 11.82%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000004417Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012178Member		 13.45%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000004417Member
/ rr_PerformanceMeasureAxis
= vanguard_Russell1000ValueIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000012178Member
Five Years 15.17%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000004417Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012178Member		 15.42%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000004417Member
/ rr_PerformanceMeasureAxis
= vanguard_Russell1000ValueIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000012178Member
Ten Years 6.89%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000004417Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012178Member		 7.30%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000004417Member
/ rr_PerformanceMeasureAxis
= vanguard_Russell1000ValueIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000012178Member