XML 18 R7.htm IDEA: XBRL DOCUMENT v2.4.1.9
Average Annual Total Returns (Vanguard Pennsylvania Tax-Exempt Money Market Fund Retail)
Vanguard Pennsylvania Tax-Exempt Money Market Fund
Vanguard Pennsylvania Tax-Exempt Money Market Fund - Investor Shares
12/1/2013 - 11/30/2014
Other States Tax-Exempt Money Market Funds Average
Vanguard Pennsylvania Tax-Exempt Money Market Fund
Vanguard Pennsylvania Tax-Exempt Money Market Fund - Investor Shares
12/1/2013 - 11/30/2014
Spliced Pennsylvania Tax-Exempt Money Market Funds Average
Vanguard Pennsylvania Tax-Exempt Money Market Fund
Vanguard Pennsylvania Tax-Exempt Money Market Fund - Investor Shares
12/1/2013 - 11/30/2014
Average Annual Returns for Periods Ended December 31, 2014      
One Year 0.01%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member		 0.01%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_PerformanceMeasureAxis
= vanguard_OtherStatesTaxExemptMoneyMarketFundsAverageMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member		 0.01%rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_PerformanceMeasureAxis
= vanguard_SplicedPennsylvaniaTaxExemptMoneyMarketFundsMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member
Five Years 0.04%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member		 0.01%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_PerformanceMeasureAxis
= vanguard_OtherStatesTaxExemptMoneyMarketFundsAverageMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member		 none
Ten Years 1.21%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member		 0.98%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_PerformanceMeasureAxis
= vanguard_OtherStatesTaxExemptMoneyMarketFundsAverageMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member		 0.97%rr_AverageAnnualReturnYear10
/ dei_LegalEntityAxis
= vanguard_S000002912Member
/ rr_PerformanceMeasureAxis
= vanguard_SplicedPennsylvaniaTaxExemptMoneyMarketFundsMember
/ rr_ProspectusShareClassAxis
= vanguard_C000007978Member