v3.25.1
Expense Example - FidelityMassachusettsMunicipalMoneyMarketFund-InstitutionalPRO - FidelityMassachusettsMunicipalMoneyMarketFund-InstitutionalPRO - Fidelity Massachusetts Municipal Money Market Fund - Fidelity Massachusetts Municipal Money Market Fund - Institutional Class
Apr. 01, 2025
USD ($)
Expense Example:  
1 year $ 20
3 years 64
5 years 113
10 years $ 255