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Expense Example, No Redemption (Vanguard Morgan Growth Fund Participant:)
Vanguard Morgan Growth Fund
Vanguard Morgan Growth Fund - Admiral Shares
10/1/2013 - 9/30/2014
USD ($)
Expense Example, No Redemption:  
1 YEAR 27rr_ExpenseExampleNoRedemptionYear01
/ dei_LegalEntityAxis
= vanguard_S000002871Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007889Member
3 YEAR 84rr_ExpenseExampleNoRedemptionYear03
/ dei_LegalEntityAxis
= vanguard_S000002871Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007889Member
5 YEAR 146rr_ExpenseExampleNoRedemptionYear05
/ dei_LegalEntityAxis
= vanguard_S000002871Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007889Member
10 YEAR 331rr_ExpenseExampleNoRedemptionYear10
/ dei_LegalEntityAxis
= vanguard_S000002871Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007889Member