| Form N-CSR Cover | 12 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Fidelity Revere Street Trust |
| Entity Central Index Key | 0001022695 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 12 Months Ended |
| May 31, 2024 USD ($) shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Fidelity Revere Street Trust |
| Entity Central Index Key | 0001022695 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| Fidelity Tax-Free Cash Central Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Tax-Free Cash Central Fund |
| Class Name | Fidelity® Tax-Free Cash Central Fund |
| No Trading Symbol Flag | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Tax-Free Cash Central Fund for the period June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Tax-Free Cash Central Fund $ A 0.00 % B A Amount represents less than $.50 B Amount represents less than 0.005% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| Net Assets | $ 1,451,419,094 |
| Holdings Count | shares | 226 |
| Advisory Fees Paid, Amount | $ 0 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) KEY FACTS Fund Size $ Number of Holdings 226 Total Advisory Fee $ |
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 99.9 Variable Rate Demand Notes (VRDNs) 63.9 Tender Option Bond 32.7 Municipal Securities 3.3 Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets) |
| Fidelity Cash Central Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Cash Central Fund |
| Class Name | Fidelity® Cash Central Fund |
| No Trading Symbol Flag | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Cash Central Fund for the period June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Cash Central Fund $ A 0.00 % B A Amount represents less than $.50 B Amount represents less than 0.005% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| Net Assets | $ 48,411,595,900 |
| Holdings Count | shares | 26 |
| Advisory Fees Paid, Amount | $ 0 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) KEY FACTS Fund Size $ Number of Holdings 26 Total Advisory Fee $ |
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 72.5 8-30 12.1 31-60 13.8 61-90 1.7 91-180 0.1 Repurchase Agreements 68.0 U.S. Treasury Obligations 30.4 Non-Negotiable Time Deposit 1.8 ASSET ALLOCATION (% of Fund's net assets) Net Other Assets (Liabilities) - (0.2)% |
| Fidelity Municipal Cash Central Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Cash Central Fund |
| Class Name | Fidelity® Municipal Cash Central Fund |
| No Trading Symbol Flag | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Municipal Cash Central Fund for the period June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Municipal Cash Central Fund $ A 0.00 % B A Amount represents less than $.50 B Amount represents less than 0.005% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| Net Assets | $ 1,991,760,698 |
| Holdings Count | shares | 269 |
| Advisory Fees Paid, Amount | $ 0 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) KEY FACTS Fund Size $ Number of Holdings 269 Total Advisory Fee $ |
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 98.3 Variable Rate Demand Notes (VRDNs) 59.1 Tender Option Bond 37.8 Municipal Securities 1.4 Net Other Assets (Liabilities) 1.7 ASSET ALLOCATION (% of Fund's net assets) |
| Fidelity Securities Lending Cash Central Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Securities Lending Cash Central Fund |
| Class Name | Fidelity® Securities Lending Cash Central Fund |
| No Trading Symbol Flag | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Securities Lending Cash Central Fund for the period June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Securities Lending Cash Central Fund $ A 0.00 % B A Amount represents less than $.50 B Amount represents less than 0.005% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| Net Assets | $ 24,897,834,231 |
| Holdings Count | shares | 26 |
| Advisory Fees Paid, Amount | $ 0 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) KEY FACTS Fund Size $ Number of Holdings 26 Total Advisory Fee $ |
| Holdings [Text Block] | EFFECTIVE MATURITY DIVERSIFICATION (% of Fund's net assets) Days 1-7 70.0 8-30 12.3 31-60 15.2 61-90 1.8 91-180 0.1 Repurchase Agreements 65.5 U.S. Treasury Obligations 32.2 Non-Negotiable Time Deposit 1.7 Net Other Assets (Liabilities) 0.6 ASSET ALLOCATION (% of Fund's net assets) |
| Shareholder Report, Holdings (Details) | May 31, 2024 |
| Fidelity Tax-Free Cash Central Fund | EMD0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.90% |
| Fidelity Tax-Free Cash Central Fund | AAVariableRateDemandNotesVRDNsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 63.90% |
| Fidelity Tax-Free Cash Central Fund | AATenderOptionBondMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.70% |
| Fidelity Tax-Free Cash Central Fund | AAMunicipalSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Tax-Free Cash Central Fund | AANetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Cash Central Fund | EMD0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 72.50% |
| Fidelity Cash Central Fund | EMD1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity Cash Central Fund | EMD2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Fidelity Cash Central Fund | EMD3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Cash Central Fund | EMD4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Cash Central Fund | AARepurchaseAgreementsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 68% |
| Fidelity Cash Central Fund | AAUSTreasuryObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.40% |
| Fidelity Cash Central Fund | AANonNegotiableTimeDepositMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Municipal Cash Central Fund | EMD0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.30% |
| Fidelity Municipal Cash Central Fund | AAVariableRateDemandNotesVRDNsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59.10% |
| Fidelity Municipal Cash Central Fund | AATenderOptionBondMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 37.80% |
| Fidelity Municipal Cash Central Fund | AAMunicipalSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity Municipal Cash Central Fund | AANetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Securities Lending Cash Central Fund | EMD0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 70% |
| Fidelity Securities Lending Cash Central Fund | EMD1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| Fidelity Securities Lending Cash Central Fund | EMD2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.20% |
| Fidelity Securities Lending Cash Central Fund | EMD3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Securities Lending Cash Central Fund | EMD4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Securities Lending Cash Central Fund | AANetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Securities Lending Cash Central Fund | AARepurchaseAgreementsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.50% |
| Fidelity Securities Lending Cash Central Fund | AAUSTreasuryObligationsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.20% |
| Fidelity Securities Lending Cash Central Fund | AANonNegotiableTimeDepositMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
