XML 14 R7.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Sep. 30, 2010
Registrant Name dei_EntityRegistrantName Vanguard Quantitative Funds /
Central Index Key dei_EntityCentralIndexKey 0000799127
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Oct. 10, 2011
Document Effective Date dei_DocumentEffectiveDate Sep. 30, 2011
Participant | Vanguard Growth and Income Fund
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Jan. 27, 2011
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Participant: | Vanguard Growth and Income Fund
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Jan. 27, 2011
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Retail | Vanguard Growth and Income Fund
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Jan. 27, 2011
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Investor Shares or Admiral Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
EXAMPLE rr_ExpenseExampleHeading

Examples
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following examples are intended to help you compare the cost of investing in the Fund's Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Vanguard Growth and Income Fund | Vanguard Growth and Income Fund - Investor Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther none
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for fund account balances below $10,000) rr_MaximumAccountFee 20
Management Expenses rr_ManagementFeesOverAssets 0.31%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.34% [1]
1 YEAR rr_ExpenseExampleNoRedemptionYear01 35
3 YEAR rr_ExpenseExampleNoRedemptionYear03 109
5 YEAR rr_ExpenseExampleNoRedemptionYear05 191
10 YEAR rr_ExpenseExampleNoRedemptionYear10 431
Vanguard Growth and Income Fund | Vanguard Growth and Income Fund - Admiral Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther none
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for fund account balances below $10,000) rr_MaximumAccountFee 20
Management Expenses rr_ManagementFeesOverAssets 0.20%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.23% [1]
1 YEAR rr_ExpenseExampleNoRedemptionYear01 24
3 YEAR rr_ExpenseExampleNoRedemptionYear03 74
5 YEAR rr_ExpenseExampleNoRedemptionYear05 130
10 YEAR rr_ExpenseExampleNoRedemptionYear10 293
[1] The expense information shown in the table has been restated to reflect estimated amounts for the current fiscal year.