v3.25.1
Annual Total Returns - FidelityMassachusettsMunicipalMoneyMarketFund-InstitutionalPRO - FidelityMassachusettsMunicipalMoneyMarketFund-InstitutionalPRO - Fidelity Massachusetts Municipal Money Market Fund - Fidelity Massachusetts Municipal Money Market Fund - Institutional Class
Apr. 01, 2025
Bar Chart Table:  
Annual Return 2015 0.06%
Annual Return 2016 0.31%
Annual Return 2017 0.66%
Annual Return 2018 1.23%
Annual Return 2019 1.31%
Annual Return 2020 0.43%
Annual Return 2021 0.02%
Annual Return 2022 0.96%
Annual Return 2023 2.96%
Annual Return 2024 3.11%