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Annual Fund Operating Expenses (Vanguard U.S. Growth Fund Participant)
Vanguard U.S. Growth Fund
Vanguard U.S. Growth Fund - Investor Shares
9/1/2013 - 8/31/2014
Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)  
Management Fees 0.42%rr_ManagementFeesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000004444Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012210Member
12b-1 Distribution Fee none
Other Expenses 0.02%rr_OtherExpensesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000004444Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012210Member
Total Annual Fund Operating Expenses 0.44%rr_NetExpensesOverAssets
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= vanguard_S000004444Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012210Member