XML 76 R136.htm IDEA: XBRL DOCUMENT v2.4.1.9
Shareholder Fees (Vanguard Mega Cap Growth Index Fund ETF)
Vanguard Mega Cap Growth Index Fund
Vanguard Mega Cap Growth Index Fund - ETF Shares
9/1/2013 - 8/31/2014
Shareholder Fees (fees paid directly from your investment]  
Transaction Fee on Conversion to ETF Shares 0vanguard_ETFConversionFee
/ dei_LegalEntityAxis
= vanguard_S000019700Member
/ rr_ProspectusShareClassAxis
= vanguard_C000055216Member
Transaction Fee On Purchases and Sales 0vanguard_TransactionFeeOnPurchases
/ dei_LegalEntityAxis
= vanguard_S000019700Member
/ rr_ProspectusShareClassAxis
= vanguard_C000055216Member
Transaction Fee On Reinvested Dividends 0vanguard_TransactionFeeOnReinvestedDividends
/ dei_LegalEntityAxis
= vanguard_S000019700Member
/ rr_ProspectusShareClassAxis
= vanguard_C000055216Member