| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity Municipal Trust |
| Entity Central Index Key | 0000035373 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity Municipal Trust |
| Entity Central Index Key | 0000035373 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Fidelity Advisor Municipal Income Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Income Fund |
| Class Name | Fidelity Advisor® Municipal Income Fund Class I |
| Trading Symbol | FROGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $ 0.52 % |
| Expenses Paid, Amount | $ 26 |
| Expense Ratio, Percent | 0.52% |
| Net Assets | $ 4,615,397,246 |
| Holdings Count | shares | 1,417 |
| Investment Company Portfolio Turnover | 11% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,417 Portfolio Turnover 11 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 23.8 General Obligations 22.0 Health Care 20.5 Education 9.8 Special Tax 9.3 State G.O. 6.1 Others(Individually Less Than 5%) 8.5 100.0 AAA 5.6 AA 29.7 A 46.3 BBB 10.2 BB 2.4 B 0.4 CCC,CC,C 0.0 Not Rated 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.8 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 14.9 New York 9.0 Pennsylvania 7.7 New Jersey 6.5 Florida 6.3 |
| Fidelity Michigan Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Michigan Municipal Income Fund |
| Class Name | Fidelity® Michigan Municipal Income Fund |
| Trading Symbol | FMHTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Michigan Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Michigan Municipal Income Fund $ 0.48 % |
| Expenses Paid, Amount | $ 24 |
| Expense Ratio, Percent | 0.48% |
| Net Assets | $ 466,692,866 |
| Holdings Count | shares | 285 |
| Investment Company Portfolio Turnover | 17% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 285 Portfolio Turnover 17 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Health Care 22.7 General Obligations 22.6 Transportation 13.2 Education 11.5 Housing 9.5 Electric Utilities 6.6 Others(Individually Less Than 5%) 13.9 100.0 AAA 2.9 AA 45.9 A 34.5 BBB 5.9 BB 1.8 Not Rated 7.7 Short-Term Investments and Net Other Assets (Liabilities) 1.3 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Limited Term Municipal Income Fund |
| Class Name | Fidelity Advisor® Limited Term Municipal Income Fund Class A |
| Trading Symbol | FASHX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Limited Term Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 0.55 % |
| Expenses Paid, Amount | $ 27 |
| Expense Ratio, Percent | 0.55% |
| Net Assets | $ 2,594,296,689 |
| Holdings Count | shares | 988 |
| Investment Company Portfolio Turnover | 19% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 988 Portfolio Turnover 19 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 24.0 Transportation 21.7 Health Care 16.7 Housing 7.5 State G.O. 7.3 Electric Utilities 7.0 Others(Individually Less Than 5%) 15.8 100.0 AAA 13.2 AA 39.8 A 38.2 BBB 6.3 BB 0.6 Not Rated 1.8 Short-Term Investments and Net Other Assets (Liabilities) 0.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 15.5 New York 11.5 Illinois 8.8 New Jersey 4.6 Florida 4.3 |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Conservative Income Municipal Bond Fund |
| Class Name | Fidelity Advisor® Conservative Income Municipal Bond Fund Class Z |
| Trading Symbol | FMNHX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Conservative Income Municipal Bond Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $ 0.20 % |
| Expenses Paid, Amount | $ 10 |
| Expense Ratio, Percent | 0.20% |
| Net Assets | $ 1,498,953,331 |
| Holdings Count | shares | 540 |
| Investment Company Portfolio Turnover | 73% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 540 Portfolio Turnover 73 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Synthetics 19.2 General Obligations 17.4 Resource Recovery 12.8 Industrial Development 11.6 Transportation 10.1 Health Care 7.8 Electric Utilities 7.8 Housing 6.0 Others(Individually Less Than 5%) 7.3 100.0 AAA 14.2 AA 20.0 A 42.2 BBB 16.4 Not Rated 11.0 QUALITY DIVERSIFICATION (% of Fund's net assets) Short-Term Investments and Net Other Assets (Liabilities) - (3.8)%* We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Non-state Specific 12.9 Texas 11.3 Florida 8.0 Pennsylvania 7.0 North Dakota 6.2 |
| Fidelity Limited Term Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Limited Term Municipal Income Fund |
| Class Name | Fidelity® Limited Term Municipal Income Fund |
| Trading Symbol | FSTFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Limited Term Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Limited Term Municipal Income Fund $ 0.30 % |
| Expenses Paid, Amount | $ 15 |
| Expense Ratio, Percent | 0.30% |
| Net Assets | $ 2,594,296,689 |
| Holdings Count | shares | 988 |
| Investment Company Portfolio Turnover | 19% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 988 Portfolio Turnover 19 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 24.0 Transportation 21.7 Health Care 16.7 Housing 7.5 State G.O. 7.3 Electric Utilities 7.0 Others(Individually Less Than 5%) 15.8 100.0 AAA 13.2 AA 39.8 A 38.2 BBB 6.3 BB 0.6 Not Rated 1.8 Short-Term Investments and Net Other Assets (Liabilities) 0.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 15.5 New York 11.5 Illinois 8.8 New Jersey 4.6 Florida 4.3 |
| Fidelity Conservative Income Municipal Bond Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Conservative Income Municipal Bond Fund |
| Class Name | Fidelity® Conservative Income Municipal Bond Fund |
| Trading Symbol | FMNDX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Conservative Income Municipal Bond Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Conservative Income Municipal Bond Fund $ 0.25 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.25% |
| Net Assets | $ 1,498,953,331 |
| Holdings Count | shares | 540 |
| Investment Company Portfolio Turnover | 73% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 540 Portfolio Turnover 73 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Synthetics 19.2 General Obligations 17.4 Resource Recovery 12.8 Industrial Development 11.6 Transportation 10.1 Health Care 7.8 Electric Utilities 7.8 Housing 6.0 Others(Individually Less Than 5%) 7.3 100.0 AAA 14.2 AA 20.0 A 42.2 BBB 16.4 Not Rated 11.0 QUALITY DIVERSIFICATION (% of Fund's net assets) Short-Term Investments and Net Other Assets (Liabilities) - (3.8)%* We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Non-state Specific 12.9 Texas 11.3 Florida 8.0 Pennsylvania 7.0 North Dakota 6.2 |
| Fidelity Flex Conservative Income Municipal Bond Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity Flex® Conservative Income Municipal Bond Fund |
| Class Name | Fidelity Flex® Conservative Income Municipal Bond Fund |
| Trading Symbol | FUEMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity Flex® Conservative Income Municipal Bond Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-3455 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity Flex® Conservative Income Municipal Bond 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 | $ 179,825,903 |
| Holdings Count | shares | 366 |
| Investment Company Portfolio Turnover | 63% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 366 Portfolio Turnover 63 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Synthetics 21.1 General Obligations 19.3 Resource Recovery 11.8 Industrial Development 10.8 Health Care 9.3 Electric Utilities 9.2 Transportation 7.6 Others(Individually Less Than 5%) 10.9 100.0 AAA 13.7 AA 20.4 A 41.1 BBB 16.3 Not Rated 14.0 QUALITY DIVERSIFICATION (% of Fund's net assets) Short-Term Investments and Net Other Assets (Liabilities) - (5.5)%* We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 12.7 North Dakota 10.5 Non-state Specific 10.5 Pennsylvania 7.9 Florida 6.4 |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Conservative Income Municipal Bond Fund |
| Class Name | Fidelity Advisor® Conservative Income Municipal Bond Fund Class A |
| Trading Symbol | FMNFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Conservative Income Municipal Bond Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 0.43 % |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.43% |
| Net Assets | $ 1,498,953,331 |
| Holdings Count | shares | 540 |
| Investment Company Portfolio Turnover | 73% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 540 Portfolio Turnover 73 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Synthetics 19.2 General Obligations 17.4 Resource Recovery 12.8 Industrial Development 11.6 Transportation 10.1 Health Care 7.8 Electric Utilities 7.8 Housing 6.0 Others(Individually Less Than 5%) 7.3 100.0 AAA 14.2 AA 20.0 A 42.2 BBB 16.4 Not Rated 11.0 QUALITY DIVERSIFICATION (% of Fund's net assets) Short-Term Investments and Net Other Assets (Liabilities) - (3.8)%* We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Non-state Specific 12.9 Texas 11.3 Florida 8.0 Pennsylvania 7.0 North Dakota 6.2 |
| Fidelity Minnesota Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Minnesota Municipal Income Fund |
| Class Name | Fidelity® Minnesota Municipal Income Fund |
| Trading Symbol | FIMIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Minnesota Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Minnesota Municipal Income Fund $ 0.49 % |
| Expenses Paid, Amount | $ 24 |
| Expense Ratio, Percent | 0.49% |
| Net Assets | $ 539,177,396 |
| Holdings Count | shares | 355 |
| Investment Company Portfolio Turnover | 32% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 355 Portfolio Turnover 32 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 36.6 Health Care 28.2 Education 10.8 Housing 10.8 Electric Utilities 5.4 Others(Individually Less Than 5%) 8.2 100.0 AAA 14.6 AA 42.7 A 28.3 BBB 10.7 BB 0.6 Not Rated 2.0 Short-Term Investments and Net Other Assets (Liabilities) 1.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. |
| Fidelity Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Income Fund |
| Class Name | Fidelity® Municipal Income Fund |
| Trading Symbol | FHIGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Municipal Income Fund $ 0.44 % |
| Expenses Paid, Amount | $ 22 |
| Expense Ratio, Percent | 0.44% |
| Net Assets | $ 4,615,397,246 |
| Holdings Count | shares | 1,417 |
| Investment Company Portfolio Turnover | 11% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,417 Portfolio Turnover 11 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 23.8 General Obligations 22.0 Health Care 20.5 Education 9.8 Special Tax 9.3 State G.O. 6.1 Others(Individually Less Than 5%) 8.5 100.0 AAA 5.6 AA 29.7 A 46.3 BBB 10.2 BB 2.4 B 0.4 CCC,CC,C 0.0 Not Rated 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.8 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 14.9 New York 9.0 Pennsylvania 7.7 New Jersey 6.5 Florida 6.3 |
| Fidelity Flex Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity Flex® Municipal Income Fund |
| Class Name | Fidelity Flex® Municipal Income Fund |
| Trading Symbol | FUENX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity Flex® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-3455 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity Flex® Municipal Income 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 | $ 779,750,071 |
| Holdings Count | shares | 1,152 |
| Investment Company Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,152 Portfolio Turnover 7 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 20.6 Transportation 20.6 Health Care 11.1 Education 10.9 Special Tax 10.0 Housing 8.0 Others(Individually Less Than 5%) 18.8 100.0 AAA 7.6 AA 34.7 A 37.7 BBB 9.7 BB 0.8 B 0.2 CCC,CC,C 0.2 Not Rated 3.6 Short-Term Investments and Net Other Assets (Liabilities) 5.5 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 10.7 New York 9.9 Pennsylvania 7.5 California 6.1 New Jersey 5.9 |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Limited Term Municipal Income Fund |
| Class Name | Fidelity Advisor® Limited Term Municipal Income Fund Class I |
| Trading Symbol | FISHX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Limited Term Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $ 0.30 % |
| Expenses Paid, Amount | $ 15 |
| Expense Ratio, Percent | 0.30% |
| Net Assets | $ 2,594,296,689 |
| Holdings Count | shares | 988 |
| Investment Company Portfolio Turnover | 19% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 988 Portfolio Turnover 19 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 24.0 Transportation 21.7 Health Care 16.7 Housing 7.5 State G.O. 7.3 Electric Utilities 7.0 Others(Individually Less Than 5%) 15.8 100.0 AAA 13.2 AA 39.8 A 38.2 BBB 6.3 BB 0.6 Not Rated 1.8 Short-Term Investments and Net Other Assets (Liabilities) 0.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 15.5 New York 11.5 Illinois 8.8 New Jersey 4.6 Florida 4.3 |
| Fidelity Advisor Municipal Income Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Income Fund |
| Class Name | Fidelity Advisor® Municipal Income Fund Class Z |
| Trading Symbol | FIWEX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $ 0.41 % |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.41% |
| Net Assets | $ 4,615,397,246 |
| Holdings Count | shares | 1,417 |
| Investment Company Portfolio Turnover | 11% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,417 Portfolio Turnover 11 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 23.8 General Obligations 22.0 Health Care 20.5 Education 9.8 Special Tax 9.3 State G.O. 6.1 Others(Individually Less Than 5%) 8.5 100.0 AAA 5.6 AA 29.7 A 46.3 BBB 10.2 BB 2.4 B 0.4 CCC,CC,C 0.0 Not Rated 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.8 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 14.9 New York 9.0 Pennsylvania 7.7 New Jersey 6.5 Florida 6.3 |
| Fidelity Ohio Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Ohio Municipal Income Fund |
| Class Name | Fidelity® Ohio Municipal Income Fund |
| Trading Symbol | FOHFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Ohio Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Ohio Municipal Income Fund $ 0.47 % |
| Expenses Paid, Amount | $ 24 |
| Expense Ratio, Percent | 0.47% |
| Net Assets | $ 489,392,781 |
| Holdings Count | shares | 275 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 275 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Health Care 36.6 Education 20.2 Special Tax 8.4 General Obligations 7.0 Housing 5.0 Others(Individually Less Than 5%) 22.8 100.0 AAA 6.9 AA 34.7 A 35.2 BBB 13.0 BB 0.9 Not Rated 6.9 Short-Term Investments and Net Other Assets (Liabilities) 2.4 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. |
| Fidelity Advisor Municipal Income Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Income Fund |
| Class Name | Fidelity Advisor® Municipal Income Fund Class A |
| Trading Symbol | FHUGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 0.77 % |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.77% |
| Net Assets | $ 4,615,397,246 |
| Holdings Count | shares | 1,417 |
| Investment Company Portfolio Turnover | 11% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,417 Portfolio Turnover 11 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 23.8 General Obligations 22.0 Health Care 20.5 Education 9.8 Special Tax 9.3 State G.O. 6.1 Others(Individually Less Than 5%) 8.5 100.0 AAA 5.6 AA 29.7 A 46.3 BBB 10.2 BB 2.4 B 0.4 CCC,CC,C 0.0 Not Rated 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.8 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 14.9 New York 9.0 Pennsylvania 7.7 New Jersey 6.5 Florida 6.3 |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Limited Term Municipal Income Fund |
| Class Name | Fidelity Advisor® Limited Term Municipal Income Fund Class Z |
| Trading Symbol | FIWAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Limited Term Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $ 0.25 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.25% |
| Net Assets | $ 2,594,296,689 |
| Holdings Count | shares | 988 |
| Investment Company Portfolio Turnover | 19% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 988 Portfolio Turnover 19 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 24.0 Transportation 21.7 Health Care 16.7 Housing 7.5 State G.O. 7.3 Electric Utilities 7.0 Others(Individually Less Than 5%) 15.8 100.0 AAA 13.2 AA 39.8 A 38.2 BBB 6.3 BB 0.6 Not Rated 1.8 Short-Term Investments and Net Other Assets (Liabilities) 0.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 15.5 New York 11.5 Illinois 8.8 New Jersey 4.6 Florida 4.3 |
| Fidelity Pennsylvania Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Pennsylvania Municipal Income Fund |
| Class Name | Fidelity® Pennsylvania Municipal Income Fund |
| Trading Symbol | FPXTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Pennsylvania Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Pennsylvania Municipal Income Fund $ 0.48 % |
| Expenses Paid, Amount | $ 24 |
| Expense Ratio, Percent | 0.48% |
| Net Assets | $ 399,407,787 |
| Holdings Count | shares | 221 |
| Investment Company Portfolio Turnover | 4% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 221 Portfolio Turnover 4 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Health Care 26.9 Transportation 19.3 Education 18.9 General Obligations 13.4 Housing 7.2 Others(Individually Less Than 5%) 14.3 100.0 AA 20.3 A 60.2 BBB 6.9 BB 4.8 B 1.0 Not Rated 4.2 Short-Term Investments and Net Other Assets (Liabilities) 2.6 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Limited Term Municipal Income Fund |
| Class Name | Fidelity Advisor® Limited Term Municipal Income Fund Class C |
| Trading Symbol | FCSHX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Limited Term Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $ 1.29 % |
| Expenses Paid, Amount | $ 64 |
| Expense Ratio, Percent | 1.29% |
| Net Assets | $ 2,594,296,689 |
| Holdings Count | shares | 988 |
| Investment Company Portfolio Turnover | 19% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 988 Portfolio Turnover 19 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 24.0 Transportation 21.7 Health Care 16.7 Housing 7.5 State G.O. 7.3 Electric Utilities 7.0 Others(Individually Less Than 5%) 15.8 100.0 AAA 13.2 AA 39.8 A 38.2 BBB 6.3 BB 0.6 Not Rated 1.8 Short-Term Investments and Net Other Assets (Liabilities) 0.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 15.5 New York 11.5 Illinois 8.8 New Jersey 4.6 Florida 4.3 |
| Fidelity Advisor Municipal Income Fund - Class M | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Income Fund |
| Class Name | Fidelity Advisor® Municipal Income Fund Class M |
| Trading Symbol | FLUVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class M $ 0.75 % |
| Expenses Paid, Amount | $ 37 |
| Expense Ratio, Percent | 0.75% |
| Net Assets | $ 4,615,397,246 |
| Holdings Count | shares | 1,417 |
| Investment Company Portfolio Turnover | 11% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,417 Portfolio Turnover 11 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 23.8 General Obligations 22.0 Health Care 20.5 Education 9.8 Special Tax 9.3 State G.O. 6.1 Others(Individually Less Than 5%) 8.5 100.0 AAA 5.6 AA 29.7 A 46.3 BBB 10.2 BB 2.4 B 0.4 CCC,CC,C 0.0 Not Rated 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.8 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 14.9 New York 9.0 Pennsylvania 7.7 New Jersey 6.5 Florida 6.3 |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Limited Term Municipal Income Fund |
| Class Name | Fidelity Advisor® Limited Term Municipal Income Fund Class M |
| Trading Symbol | FTSHX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Limited Term Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class M $ 0.55 % |
| Expenses Paid, Amount | $ 27 |
| Expense Ratio, Percent | 0.55% |
| Net Assets | $ 2,594,296,689 |
| Holdings Count | shares | 988 |
| Investment Company Portfolio Turnover | 19% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 988 Portfolio Turnover 19 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) General Obligations 24.0 Transportation 21.7 Health Care 16.7 Housing 7.5 State G.O. 7.3 Electric Utilities 7.0 Others(Individually Less Than 5%) 15.8 100.0 AAA 13.2 AA 39.8 A 38.2 BBB 6.3 BB 0.6 Not Rated 1.8 Short-Term Investments and Net Other Assets (Liabilities) 0.1 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Texas 15.5 New York 11.5 Illinois 8.8 New Jersey 4.6 Florida 4.3 |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Conservative Income Municipal Bond Fund |
| Class Name | Fidelity Advisor® Conservative Income Municipal Bond Fund Class I |
| Trading Symbol | FMNGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Conservative Income Municipal Bond Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $ 0.25 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.25% |
| Net Assets | $ 1,498,953,331 |
| Holdings Count | shares | 540 |
| Investment Company Portfolio Turnover | 73% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 540 Portfolio Turnover 73 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Synthetics 19.2 General Obligations 17.4 Resource Recovery 12.8 Industrial Development 11.6 Transportation 10.1 Health Care 7.8 Electric Utilities 7.8 Housing 6.0 Others(Individually Less Than 5%) 7.3 100.0 AAA 14.2 AA 20.0 A 42.2 BBB 16.4 Not Rated 11.0 QUALITY DIVERSIFICATION (% of Fund's net assets) Short-Term Investments and Net Other Assets (Liabilities) - (3.8)%* We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Non-state Specific 12.9 Texas 11.3 Florida 8.0 Pennsylvania 7.0 North Dakota 6.2 |
| Fidelity Advisor Municipal Income Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Municipal Income Fund |
| Class Name | Fidelity Advisor® Municipal Income Fund Class C |
| Trading Symbol | FKISX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® Municipal Income Fund for the period January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-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 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last six months? (based on hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $ 1.51 % |
| Expenses Paid, Amount | $ 75 |
| Expense Ratio, Percent | 1.51% |
| Net Assets | $ 4,615,397,246 |
| Holdings Count | shares | 1,417 |
| Investment Company Portfolio Turnover | 11% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of June 30, 2024) KEY FACTS Fund Size $ Number of Holdings 1,417 Portfolio Turnover 11 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 23.8 General Obligations 22.0 Health Care 20.5 Education 9.8 Special Tax 9.3 State G.O. 6.1 Others(Individually Less Than 5%) 8.5 100.0 AAA 5.6 AA 29.7 A 46.3 BBB 10.2 BB 2.4 B 0.4 CCC,CC,C 0.0 Not Rated 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.8 QUALITY DIVERSIFICATION (% of Fund's net assets) We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes. TOP STATES (% of Fund's net assets) Illinois 14.9 New York 9.0 Pennsylvania 7.7 New Jersey 6.5 Florida 6.3 |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| Fidelity Advisor Municipal Income Fund - Class I | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity Advisor Municipal Income Fund - Class I | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity Advisor Municipal Income Fund - Class I | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Advisor Municipal Income Fund - Class I | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Fidelity Advisor Municipal Income Fund - Class I | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Municipal Income Fund - Class I | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Municipal Income Fund - Class I | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| Fidelity Advisor Municipal Income Fund - Class I | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Fidelity Advisor Municipal Income Fund - Class I | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Fidelity Advisor Municipal Income Fund - Class I | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Advisor Municipal Income Fund - Class I | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Municipal Income Fund - Class I | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| Fidelity Advisor Municipal Income Fund - Class I | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| Fidelity Advisor Municipal Income Fund - Class I | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Fidelity Advisor Municipal Income Fund - Class I | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Municipal Income Fund - Class I | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Municipal Income Fund - Class I | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Municipal Income Fund - Class I | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Municipal Income Fund - Class I | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Michigan Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.70% |
| Fidelity Michigan Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.60% |
| Fidelity Michigan Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.20% |
| Fidelity Michigan Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Michigan Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Fidelity Michigan Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Fidelity Michigan Municipal Income Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.90% |
| Fidelity Michigan Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| Fidelity Michigan Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| Fidelity Michigan Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Michigan Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Michigan Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.20% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class A | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | RS8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.40% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class Z | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Fidelity Limited Term Municipal Income Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.50% |
| Fidelity Limited Term Municipal Income Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Limited Term Municipal Income Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity Limited Term Municipal Income Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Limited Term Municipal Income Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Limited Term Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24% |
| Fidelity Limited Term Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| Fidelity Limited Term Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Limited Term Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Limited Term Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Limited Term Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Limited Term Municipal Income Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Fidelity Limited Term Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.20% |
| Fidelity Limited Term Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Limited Term Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Limited Term Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Limited Term Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Conservative Income Municipal Bond Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Fidelity Conservative Income Municipal Bond Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| Fidelity Conservative Income Municipal Bond Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Conservative Income Municipal Bond Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Conservative Income Municipal Bond Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| Fidelity Conservative Income Municipal Bond Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| Fidelity Conservative Income Municipal Bond Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| Fidelity Conservative Income Municipal Bond Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| Fidelity Conservative Income Municipal Bond Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| Fidelity Conservative Income Municipal Bond Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Conservative Income Municipal Bond Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Conservative Income Municipal Bond Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Conservative Income Municipal Bond Fund | RS7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Conservative Income Municipal Bond Fund | RS8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Conservative Income Municipal Bond Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.20% |
| Fidelity Conservative Income Municipal Bond Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.40% |
| Fidelity Conservative Income Municipal Bond Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Fidelity Flex Conservative Income Municipal Bond Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.70% |
| Fidelity Flex Conservative Income Municipal Bond Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| Fidelity Flex Conservative Income Municipal Bond Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| Fidelity Flex Conservative Income Municipal Bond Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| Fidelity Flex Conservative Income Municipal Bond Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.80% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.80% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Fidelity Flex Conservative Income Municipal Bond Fund | RS7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| Fidelity Flex Conservative Income Municipal Bond Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.10% |
| Fidelity Flex Conservative Income Municipal Bond Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.30% |
| Fidelity Flex Conservative Income Municipal Bond Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | RS8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.40% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class A | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Fidelity Minnesota Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.60% |
| Fidelity Minnesota Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| Fidelity Minnesota Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.80% |
| Fidelity Minnesota Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.80% |
| Fidelity Minnesota Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Fidelity Minnesota Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Fidelity Minnesota Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.30% |
| Fidelity Minnesota Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Minnesota Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Minnesota Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Minnesota Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Municipal Income Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity Municipal Income Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity Municipal Income Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Municipal Income Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Fidelity Municipal Income Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| Fidelity Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Fidelity Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Fidelity Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Municipal Income Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| Fidelity Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| Fidelity Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Fidelity Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Municipal Income Fund | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Municipal Income Fund | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Flex Municipal Income Fund | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| Fidelity Flex Municipal Income Fund | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| Fidelity Flex Municipal Income Fund | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Flex Municipal Income Fund | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Flex Municipal Income Fund | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| Fidelity Flex Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| Fidelity Flex Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| Fidelity Flex Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Fidelity Flex Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| Fidelity Flex Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| Fidelity Flex Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Flex Municipal Income Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.80% |
| Fidelity Flex Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 37.70% |
| Fidelity Flex Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| Fidelity Flex Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Flex Municipal Income Fund | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Flex Municipal Income Fund | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Flex Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Fidelity Flex Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.20% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class I | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Municipal Income Fund - Class Z | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity Advisor Municipal Income Fund - Class Z | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity Advisor Municipal Income Fund - Class Z | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Advisor Municipal Income Fund - Class Z | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Fidelity Advisor Municipal Income Fund - Class Z | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Municipal Income Fund - Class Z | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Municipal Income Fund - Class Z | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Ohio Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.60% |
| Fidelity Ohio Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.20% |
| Fidelity Ohio Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| Fidelity Ohio Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Ohio Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Fidelity Ohio Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.80% |
| Fidelity Ohio Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.20% |
| Fidelity Ohio Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity Ohio Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Ohio Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Fidelity Ohio Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Municipal Income Fund - Class A | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity Advisor Municipal Income Fund - Class A | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity Advisor Municipal Income Fund - Class A | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Advisor Municipal Income Fund - Class A | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Fidelity Advisor Municipal Income Fund - Class A | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Municipal Income Fund - Class A | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Municipal Income Fund - Class A | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| Fidelity Advisor Municipal Income Fund - Class A | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Fidelity Advisor Municipal Income Fund - Class A | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Fidelity Advisor Municipal Income Fund - Class A | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Advisor Municipal Income Fund - Class A | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Municipal Income Fund - Class A | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| Fidelity Advisor Municipal Income Fund - Class A | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| Fidelity Advisor Municipal Income Fund - Class A | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Fidelity Advisor Municipal Income Fund - Class A | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Municipal Income Fund - Class A | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Municipal Income Fund - Class A | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Municipal Income Fund - Class A | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Municipal Income Fund - Class A | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.20% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class Z | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Pennsylvania Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.90% |
| Fidelity Pennsylvania Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| Fidelity Pennsylvania Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.90% |
| Fidelity Pennsylvania Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Fidelity Pennsylvania Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Fidelity Pennsylvania Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Fidelity Pennsylvania Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60.20% |
| Fidelity Pennsylvania Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Fidelity Pennsylvania Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Fidelity Pennsylvania Municipal Income Fund | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Pennsylvania Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Fidelity Pennsylvania Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.20% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class C | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Municipal Income Fund - Class M | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity Advisor Municipal Income Fund - Class M | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity Advisor Municipal Income Fund - Class M | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Advisor Municipal Income Fund - Class M | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Fidelity Advisor Municipal Income Fund - Class M | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Municipal Income Fund - Class M | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Municipal Income Fund - Class M | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| Fidelity Advisor Municipal Income Fund - Class M | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Fidelity Advisor Municipal Income Fund - Class M | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Fidelity Advisor Municipal Income Fund - Class M | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Advisor Municipal Income Fund - Class M | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Municipal Income Fund - Class M | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| Fidelity Advisor Municipal Income Fund - Class M | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| Fidelity Advisor Municipal Income Fund - Class M | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Fidelity Advisor Municipal Income Fund - Class M | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Municipal Income Fund - Class M | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Municipal Income Fund - Class M | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Municipal Income Fund - Class M | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Municipal Income Fund - Class M | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.20% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Advisor Limited Term Municipal Income Fund - Class M | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | RS8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.20% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.40% |
| Fidelity Advisor Conservative Income Municipal Bond Fund - Class I | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Fidelity Advisor Municipal Income Fund - Class C | TS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.90% |
| Fidelity Advisor Municipal Income Fund - Class C | TS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| Fidelity Advisor Municipal Income Fund - Class C | TS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| Fidelity Advisor Municipal Income Fund - Class C | TS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Fidelity Advisor Municipal Income Fund - Class C | TS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Fidelity Advisor Municipal Income Fund - Class C | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Municipal Income Fund - Class C | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| Fidelity Advisor Municipal Income Fund - Class C | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Fidelity Advisor Municipal Income Fund - Class C | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| Fidelity Advisor Municipal Income Fund - Class C | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| Fidelity Advisor Municipal Income Fund - Class C | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Fidelity Advisor Municipal Income Fund - Class C | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| Fidelity Advisor Municipal Income Fund - Class C | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| Fidelity Advisor Municipal Income Fund - Class C | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Fidelity Advisor Municipal Income Fund - Class C | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Advisor Municipal Income Fund - Class C | QDBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Advisor Municipal Income Fund - Class C | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Advisor Municipal Income Fund - Class C | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Fidelity Advisor Municipal Income Fund - Class C | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Label | Element | Value |
| C000198966 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 29.70% |
| C000198966 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 5.60% |
| C000198968 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 29.70% |
| C000198968 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 5.60% |
| C000198967 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 29.70% |
| C000198967 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 5.60% |
| C000019497 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 39.80% |
| C000019497 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.20% |
| C000243072 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 20% |
| C000243072 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 14.20% |
| C000019507 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 20.30% |
| C000131629 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 20% |
| C000131629 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 14.20% |
| C000019506 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 34.70% |
| C000019506 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 6.90% |
| C000019501 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 39.80% |
| C000019501 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.20% |
| C000194468 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 20.40% |
| C000194468 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.70% |
| C000019500 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 39.80% |
| C000019500 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.20% |
| C000019504 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 42.70% |
| C000019504 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 14.60% |
| C000205039 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 29.70% |
| C000205039 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 5.60% |
| C000205038 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 39.80% |
| C000205038 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.20% |
| C000243073 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 20% |
| C000243073 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 14.20% |
| C000019502 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 39.80% |
| C000019502 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.20% |
| C000019503 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 45.90% |
| C000019503 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.90% |
| C000019498 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 39.80% |
| C000019498 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 13.20% |
| C000243074 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 20% |
| C000243074 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 14.20% |
| C000019505 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 29.70% |
| C000019505 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 5.60% |
| C000198965 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 29.70% |
| C000198965 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 5.60% |
| C000194469 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 34.70% |
| C000194469 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.60% |
