Investment Risks |
Jun. 12, 2026 |
|---|---|
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | CashTransactionsRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Cash Transactions Risk. The fund may effect some or all creations and redemptions of its ETF Class shares using cash rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in a fund that effects ETF share class redemptions entirely in-kind. |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | FluctuationOfNetAssetValueAndSharePriceMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Fluctuation of Net Asset Value and Share Price. The net asset value per share (NAV) of the fund's ETF Class will generally fluctuate with changes in the market value of the fund's holdings. The fund's ETF Class shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's ETF Class shares may result in the fund's ETF Class shares trading significantly above (at a premium) or below (at a discount) to NAV. Given the nature of the relevant markets for certain of the fund's securities, the fund's ETF Class shares may trade at a larger premium or discount to the NAV than shares of other ETFs. In addition, in stressed market conditions or periods of market disruption or volatility, the market for the fund's ETF Class shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | TradingIssuesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Trading Issues. There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's ETF Class shares or to submit purchase and redemption orders for creation units. Decisions by market makers or Authorized Participants to reduce their role with respect to market making or creation and redemption activities during times of market stress, or a decline in the number of Authorized Participants due to decisions to exit the business, bankruptcy, or other factors, could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying value of the fund's portfolio securities and the market price of the fund's ETF Class shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. 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 security to decrease. |
| FidelityIntermediateMunicipalIncomeFund-ETFClassPRO | Fidelity Intermediate Municipal Income Fund | 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. |
| Document Type | 485BPOS |