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Risk/Return Summary - FidelityNewJerseyMunicipalIncomeandMunicipalMoneyMarketFund-RetailComboPRO - FidelityNewJerseyMunicipalIncomeandMunicipalMoneyMarketFund-RetailComboPRO - Fidelity New Jersey Municipal Money Market Fund
Jan. 29, 2025
Risk Lose Money [Text]  
Prospectus Line Items  
Risk Text Block   You could lose money by investing in the fund.
Risk Money Market Fund May Not Preserve Dollar [Text]  
Prospectus Line Items  
Risk Text Block   Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares.
Risk Money Market Fund Sponsor May Not Provide Support [Text]  
Prospectus Line Items  
Risk Text Block Fidelity Investments and its affiliates, the fund's sponsor, is not required to reimburse the fund for losses , and you should not expect that the sponsor will provide financial support to the fund at any time , including during periods of market stress .
Risk Not Insured Depository Institution [Text]  
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Risk Text Block   An investment in the fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
InterestRateChangesMember  
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Risk Text Block Interest Rate Changes. Interest rate increases can cause the price of a money market security to decrease.
IncomeRiskMember  
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Risk Text Block Income Risk. A low or negative interest rate environment can adversely affect the fund's yield.
GeographicConcentrationMember  
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Risk Text Block Geographic Concentration. Unfavorable political or economic conditions within New Jersey can affect the credit quality of issuers located in that state.
ForeignExposureMember  
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Risk Text Block Foreign Exposure. Entities providing credit support or a maturity-shortening structure that are located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries .
IssuerSpecificChangesMember  
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Risk Text Block Issuer-Specific Changes. A decline in the credit quality of an issuer or a provider of credit support (such as guarantees) or a maturity-shortening structure (such as demand and put features) for a security can cause the price of a money market security to decrease.
MunicipalMarketVolatilityMember  
Prospectus Line Items  
Risk Text Block Municipal Market Volatility. The municipal market is volatile and can be significantly affected by adverse tax, legislative, or political changes and the financial condition of the issuers of municipal securities.