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Disclosure - Risk/Return Detail Data {Elements} - Vanguard Small-Cap Growth Index Fund (Institutional) link:presentationLink link:calculationLink link:definitionLink 000581 - Document - Risk/Return Summary {Unlabeled} - Vanguard Small-Cap Index Fund (Admiral Shares for Participants) link:presentationLink link:calculationLink link:definitionLink 000582 - Schedule - Shareholder Fees link:presentationLink link:calculationLink link:definitionLink 000583 - Schedule - Annual Fund Operating Expenses link:presentationLink link:calculationLink link:definitionLink 000584 - Schedule - Expense Example {Transposed} link:presentationLink link:calculationLink link:definitionLink 000585 - Schedule - Expense Example, No Redemption {Transposed} link:presentationLink link:calculationLink link:definitionLink 000586 - Schedule - Annual Total Returns [BarChart] link:presentationLink link:calculationLink link:definitionLink 000587 - Schedule - Average Annual Total Returns {Transposed} link:presentationLink link:calculationLink link:definitionLink 000588 - Document - Risk/Return Detail {Unlabeled} - Vanguard Small-Cap Index Fund Admiral Shares link:presentationLink link:calculationLink link:definitionLink 000589 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Small-Cap Index Fund (Admiral Shares for Participants) link:presentationLink link:calculationLink link:definitionLink 000591 - Document - Risk/Return Summary {Unlabeled} - Vanguard Small-Cap Value Index Fund (Admiral Shares for Participants) link:presentationLink link:calculationLink link:definitionLink 000592 - Schedule - Shareholder Fees link:presentationLink link:calculationLink link:definitionLink 000593 - Schedule - Annual Fund Operating Expenses link:presentationLink link:calculationLink link:definitionLink 000594 - Schedule - Expense Example {Transposed} link:presentationLink link:calculationLink link:definitionLink 000595 - Schedule - Expense Example, No Redemption {Transposed} link:presentationLink link:calculationLink link:definitionLink 000596 - Schedule - Annual Total Returns [BarChart] link:presentationLink link:calculationLink link:definitionLink 000597 - Schedule - Average Annual Total Returns {Transposed} link:presentationLink link:calculationLink link:definitionLink 000598 - Document - Risk/Return Detail {Unlabeled} - Vanguard Small-Cap Value Index Fund Admiral Shares link:presentationLink link:calculationLink link:definitionLink 000599 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Small-Cap Value Index Fund (Admiral Shares for Participants) link:presentationLink link:calculationLink link:definitionLink 000601 - Document - Risk/Return Summary {Unlabeled} - Vanguard Small-Cap Growth Index Fund (Admiral Shares for Participants) link:presentationLink link:calculationLink link:definitionLink 000602 - Schedule - Shareholder Fees link:presentationLink link:calculationLink link:definitionLink 000603 - Schedule - Annual Fund Operating Expenses link:presentationLink link:calculationLink link:definitionLink 000604 - Schedule - Expense Example {Transposed} link:presentationLink link:calculationLink link:definitionLink 000605 - Schedule - Expense Example, No Redemption {Transposed} link:presentationLink link:calculationLink link:definitionLink 000606 - Schedule - Annual Total Returns [BarChart] link:presentationLink link:calculationLink link:definitionLink 000607 - Schedule - Average Annual Total Returns {Transposed} link:presentationLink link:calculationLink link:definitionLink 000608 - Document - Risk/Return Detail {Unlabeled} - Vanguard Small-Cap Growth Index Fund Admiral Shares link:presentationLink link:calculationLink link:definitionLink 000609 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Small-Cap Growth Index Fund (Admiral Shares for Participants) link:presentationLink link:calculationLink link:definitionLink