v3.25.1
Annual Total Returns - FidelityIntermediateLong-TermandShort-TermTreasuryBondIndexFunds-ComboPRO - FidelityIntermediateLong-TermandShort-TermTreasuryBondIndexFunds-ComboPRO - Fidelity Intermediate Treasury Bond Index Fund - Fidelity Intermediate Treasury Bond Index Fund
Apr. 29, 2025
Bar Chart Table:  
Annual Return 2015 1.67%
Annual Return 2016 0.96%
Annual Return 2017 2.28%
Annual Return 2018 1.24%
Annual Return 2019 7.25%
Annual Return 2020 9.10%
Annual Return 2021 (3.00%)
Annual Return 2022 (12.73%)
Annual Return 2023 4.06%
Annual Return 2024 0.40%