000000 - Document - Document and Entity Information link:presentationLink link:definitionLink link:calculationLink 000001 - Document - Risk/Return Summary - FidelityFlexMidCapFocusedandFlexSmallCapFocusedIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000002 - Disclosure - Risk/Return Detail Data - FidelityFlexMidCapFocusedandFlexSmallCapFocusedIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000003 - Document - Risk/Return Summary - FidelityFlexMidCapIndexFundFidelityFlexSmallCapIndexFund-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000004 - Disclosure - Risk/Return Detail Data - FidelityFlexMidCapIndexFundFidelityFlexSmallCapIndexFund-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000005 - Document - Risk/Return Summary - FidelityFlexMidCapFocusedandFlexSmallCapFocusedIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000006 - Disclosure - Risk/Return Detail Data - FidelityFlexMidCapFocusedandFlexSmallCapFocusedIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000007 - Document - Risk/Return Summary - FidelityFlexMidCapIndexFundFidelityFlexSmallCapIndexFund-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000008 - Disclosure - Risk/Return Detail Data - FidelityFlexMidCapIndexFundFidelityFlexSmallCapIndexFund-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000009 - Document - Risk/Return Summary - FidelityLargeCapGrowthIndexFund-PRO link:presentationLink link:definitionLink link:calculationLink 000010 - Disclosure - Risk/Return Detail Data - FidelityLargeCapGrowthIndexFund-PRO link:presentationLink link:definitionLink link:calculationLink 000011 - Document - Risk/Return Summary - FidelityLargeCapValueIndexFund-PRO link:presentationLink link:definitionLink link:calculationLink 000012 - Disclosure - Risk/Return Detail Data - FidelityLargeCapValueIndexFund-PRO link:presentationLink link:definitionLink link:calculationLink 000013 - Document - Risk/Return Summary - FidelityMidCapIndexSmallCapIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000014 - Disclosure - Risk/Return Detail Data - FidelityMidCapIndexSmallCapIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000015 - Document - Risk/Return Summary - FidelitySeriesLargeCapGrowthIndexFund-PRO link:presentationLink link:definitionLink link:calculationLink 000016 - Disclosure - Risk/Return Detail Data - FidelitySeriesLargeCapGrowthIndexFund-PRO link:presentationLink link:definitionLink link:calculationLink 000017 - Document - Risk/Return Summary - FidelityMidCapIndexSmallCapIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink 000018 - Disclosure - Risk/Return Detail Data - FidelityMidCapIndexSmallCapIndexFunds-ComboPRO link:presentationLink link:definitionLink link:calculationLink