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Expense Example, No Redemption (Vanguard Health Care Index Fund ETF)
Vanguard Health Care Index Fund
Vanguard Health Care Index Fund - ETF Shares
9/1/2013 - 8/31/2014
USD ($)
Expense Example, No Redemption:  
1 YEAR 12rr_ExpenseExampleNoRedemptionYear01
/ dei_LegalEntityAxis
= vanguard_S000004450Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012223Member
3 YEAR 39rr_ExpenseExampleNoRedemptionYear03
/ dei_LegalEntityAxis
= vanguard_S000004450Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012223Member
5 YEAR 68rr_ExpenseExampleNoRedemptionYear05
/ dei_LegalEntityAxis
= vanguard_S000004450Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012223Member
10 YEAR 154rr_ExpenseExampleNoRedemptionYear10
/ dei_LegalEntityAxis
= vanguard_S000004450Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012223Member