v3.25.0.1
Annual Total Returns - FidelityAdvisorConservativeIncomeMunicipalBondFund-ClassAIZ-PRO - FidelityAdvisorConservativeIncomeMunicipalBondFund-ClassAIZ-PRO - Fidelity Conservative Income Municipal Bond Fund
Mar. 01, 2025
Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z  
Bar Chart Table:  
Annual Return, Inception Date May 25, 2023
Fidelity Advisor Conservative Income Municipal Bond Fund - Class A  
Bar Chart Table:  
Annual Return, Inception Date May 25, 2023
Annual Return 2024 3.11%
Fidelity Advisor Conservative Income Municipal Bond Fund - Class I  
Bar Chart Table:  
Annual Return, Inception Date May 25, 2023