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Average Annual Total Returns (Vanguard Target Retirement 2025 Fund Participant)
Vanguard Target Retirement 2025 Fund
Vanguard Target Retirement 2025 Fund - Investor Shares
10/1/2013 - 9/30/2014
Barclays U.S. Aggregate Bond Index
Vanguard Target Retirement 2025 Fund
Vanguard Target Retirement 2025 Fund - Investor Shares
10/1/2013 - 9/30/2014
MSCI US Broad Market Index
Vanguard Target Retirement 2025 Fund
Vanguard Target Retirement 2025 Fund - Investor Shares
10/1/2013 - 9/30/2014
Target 2025 Composite Index
Vanguard Target Retirement 2025 Fund
Vanguard Target Retirement 2025 Fund - Investor Shares
10/1/2013 - 9/30/2014
Average Annual Returns for Periods Ended December 31, 2014        
One Year 7.17%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 5.97%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_BarclaysUSAggregateBondIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 12.66%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_MSCIUSBroadMarketIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 7.45%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_Target2025CompositeIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member
Five Years 10.22%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 4.45%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_BarclaysUSAggregateBondIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 15.75%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_MSCIUSBroadMarketIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 10.49%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_Target2025CompositeIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member
Ten Years 6.20%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 4.71%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_BarclaysUSAggregateBondIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 8.15%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_MSCIUSBroadMarketIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member		 6.33%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002572Member
/ rr_PerformanceMeasureAxis
= vanguard_Target2025CompositeIndexMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007075Member