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Expense Example, No Redemption (Vanguard Pennsylvania Long-Term Tax-Exempt Fund Retail)
Vanguard Pennsylvania Long-Term Tax-Exempt Fund
Vanguard Pennsylvania Long-Term Tax-Exempt Fund - Investor Shares
12/1/2013 - 11/30/2014
USD ($)
Vanguard Pennsylvania Long-Term Tax-Exempt Fund
Vanguard Pennsylvania Long-Term Tax-Exempt Fund - Admiral Shares
12/1/2013 - 11/30/2014
USD ($)
Expense Example, No Redemption:    
1 YEAR 20rr_ExpenseExampleNoRedemptionYear01
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007976Member
12rr_ExpenseExampleNoRedemptionYear01
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007977Member
3 YEAR 64rr_ExpenseExampleNoRedemptionYear03
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007976Member
39rr_ExpenseExampleNoRedemptionYear03
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007977Member
5 YEAR 113rr_ExpenseExampleNoRedemptionYear05
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007976Member
68rr_ExpenseExampleNoRedemptionYear05
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007977Member
10 YEAR 255rr_ExpenseExampleNoRedemptionYear10
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007976Member
154rr_ExpenseExampleNoRedemptionYear10
/ dei_LegalEntityAxis
= vanguard_S000002911Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007977Member