v3.25.1
Average Annual Total Returns - FidelitySAIConservativeIncomeMunicipalBondFund-PRO - FidelitySAIConservativeIncomeMunicipalBondFund-PRO - Fidelity SAI Conservative Income Municipal Bond Fund
Apr. 01, 2025
Fidelity SAI Conservative Income Municipal Bond Fund | Return Before Taxes  
Average Annual Return:  
Past 1 year 3.30%
Since Inception 3.88% [1]
Fidelity SAI Conservative Income Municipal Bond Fund | After Taxes on Distributions  
Average Annual Return:  
Past 1 year 3.30%
Since Inception 3.88% [1]
Fidelity SAI Conservative Income Municipal Bond Fund | After Taxes on Distributions and Sales  
Average Annual Return:  
Past 1 year 3.38%
Since Inception 3.80% [1]
LB015  
Average Annual Return:  
Past 1 year 1.05%
Since Inception 6.76%
F1872  
Average Annual Return:  
Past 1 year 3.10%
Since Inception 3.64%
LB319  
Average Annual Return:  
Past 1 year 2.71%
Since Inception 3.78%
[1]
A From November 6, 2023 .