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Annual Fund Operating Expenses (Vanguard Mid-Cap Value Index Fund ETF)
Vanguard Mid-Cap Value Index Fund
Vanguard Mid-Cap Value Index Fund - ETF Shares
1/1/2014 - 12/31/2014
Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)  
Management Fees 0.06%rr_ManagementFeesOverAssets
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12b-1 Distribution Fee none
Other Expenses 0.03%rr_OtherExpensesOverAssets
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= vanguard_S000012757Member
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= vanguard_C000034430Member
Total Annual Fund Operating Expenses 0.09%rr_NetExpensesOverAssets
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= vanguard_S000012757Member
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= vanguard_C000034430Member