v3.25.1
Expense Example - FidelitySeriesLong-TermTreasuryBondIndexFund-PRO - FidelitySeriesLong-TermTreasuryBondIndexFund-PRO - Fidelity Series Long-Term Treasury Bond Index Fund - Fidelity Series Long-Term Treasury Bond Index Fund
Apr. 29, 2025
USD ($)
Expense Example:  
1 year none
3 years none
5 years none
10 years none