v3.25.0.1
Average Annual Total Returns - FidelitySeries0-55YearInflation-ProtectedBondIndexFunds-ComboPRO - FidelitySeries0-55YearInflation-ProtectedBondIndexFunds-ComboPRO - Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund
Mar. 01, 2025
Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund | Return Before Taxes  
Average Annual Return:  
Past 1 year 4.86%
Since Inception 2.31% [1]
Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund | After Taxes on Distributions  
Average Annual Return:  
Past 1 year 3.75%
Since Inception 1.00% [1]
Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund | After Taxes on Distributions and Sales  
Average Annual Return:  
Past 1 year 2.93%
Since Inception 1.21% [1]
LB001  
Average Annual Return:  
Past 1 year 1.25%
Since Inception (2.35%)
IXW3Z  
Average Annual Return:  
Past 1 year 4.69%
Since Inception 2.31%
[1]
A From August 13, 2021 .