| Form N-CSR Cover | 6 Months Ended |
| Jul. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity New York Municipal Trust |
| Entity Central Index Key | 0000718581 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| Shareholder Report | 6 Months Ended |
| Jul. 31, 2024 USD ($) shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Fidelity New York Municipal Trust |
| Entity Central Index Key | 0000718581 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| Fidelity Advisor New York Municipal Income Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New York Municipal Income Fund |
| Class Name | Fidelity Advisor® New York Municipal Income Fund Class A |
| Trading Symbol | FNMAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New York Municipal Income Fund for the period February 1, 2024 to July 31, 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 | $ 1,224,414,030 |
| Holdings Count | shares | 386 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 386 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 27.1 Special Tax 22.2 Education 15.0 General Obligations 12.1 Health Care 9.2 Housing 6.4 Others(Individually Less Than 5%) 8.0 100.0 AAA 0.8 AA 52.6 A 27.6 BBB 13.3 BB 0.7 CCC,CC,C 1.2 Not Rated 2.7 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 Advisor New York Municipal Income Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New York Municipal Income Fund |
| Class Name | Fidelity Advisor® New York Municipal Income Fund Class I |
| Trading Symbol | FEMIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New York Municipal Income Fund for the period February 1, 2024 to July 31, 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 $ 0.53 % |
| Expenses Paid, Amount | $ 27 |
| Expense Ratio, Percent | 0.53% |
| Net Assets | $ 1,224,414,030 |
| Holdings Count | shares | 386 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 386 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 27.1 Special Tax 22.2 Education 15.0 General Obligations 12.1 Health Care 9.2 Housing 6.4 Others(Individually Less Than 5%) 8.0 100.0 AAA 0.8 AA 52.6 A 27.6 BBB 13.3 BB 0.7 CCC,CC,C 1.2 Not Rated 2.7 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 New York Municipal Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New York Municipal Income Fund |
| Class Name | Fidelity® New York Municipal Income Fund |
| Trading Symbol | FTFMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New York Municipal Income Fund for the period February 1, 2024 to July 31, 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® New York Municipal Income Fund $ 0.45 % |
| Expenses Paid, Amount | $ 23 |
| Expense Ratio, Percent | 0.45% |
| Net Assets | $ 1,224,414,030 |
| Holdings Count | shares | 386 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 386 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 27.1 Special Tax 22.2 Education 15.0 General Obligations 12.1 Health Care 9.2 Housing 6.4 Others(Individually Less Than 5%) 8.0 100.0 AAA 0.8 AA 52.6 A 27.6 BBB 13.3 BB 0.7 CCC,CC,C 1.2 Not Rated 2.7 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 Advisor New York Municipal Income Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New York Municipal Income Fund |
| Class Name | Fidelity Advisor® New York Municipal Income Fund Class Z |
| Trading Symbol | FIJAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New York Municipal Income Fund for the period February 1, 2024 to July 31, 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 $ 0.43 % |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.43% |
| Net Assets | $ 1,224,414,030 |
| Holdings Count | shares | 386 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 386 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 27.1 Special Tax 22.2 Education 15.0 General Obligations 12.1 Health Care 9.2 Housing 6.4 Others(Individually Less Than 5%) 8.0 100.0 AAA 0.8 AA 52.6 A 27.6 BBB 13.3 BB 0.7 CCC,CC,C 1.2 Not Rated 2.7 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 Advisor New York Municipal Income Fund - Class M | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New York Municipal Income Fund |
| Class Name | Fidelity Advisor® New York Municipal Income Fund Class M |
| Trading Symbol | FNYPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New York Municipal Income Fund for the period February 1, 2024 to July 31, 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 $ 0.72 % |
| Expenses Paid, Amount | $ 36 |
| Expense Ratio, Percent | 0.72% |
| Net Assets | $ 1,224,414,030 |
| Holdings Count | shares | 386 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 386 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 27.1 Special Tax 22.2 Education 15.0 General Obligations 12.1 Health Care 9.2 Housing 6.4 Others(Individually Less Than 5%) 8.0 100.0 AAA 0.8 AA 52.6 A 27.6 BBB 13.3 BB 0.7 CCC,CC,C 1.2 Not Rated 2.7 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 Advisor New York Municipal Income Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New York Municipal Income Fund |
| Class Name | Fidelity Advisor® New York Municipal Income Fund Class C |
| Trading Symbol | FNYCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains information about Fidelity® New York Municipal Income Fund for the period February 1, 2024 to July 31, 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 $ 1.47 % |
| Expenses Paid, Amount | $ 73 |
| Expense Ratio, Percent | 1.47% |
| Net Assets | $ 1,224,414,030 |
| Holdings Count | shares | 386 |
| Investment Company Portfolio Turnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024) KEY FACTS Fund Size $ Number of Holdings 386 Portfolio Turnover 8 % |
| Holdings [Text Block] | REVENUE SOURCES (% of Fund's net assets) Transportation 27.1 Special Tax 22.2 Education 15.0 General Obligations 12.1 Health Care 9.2 Housing 6.4 Others(Individually Less Than 5%) 8.0 100.0 AAA 0.8 AA 52.6 A 27.6 BBB 13.3 BB 0.7 CCC,CC,C 1.2 Not Rated 2.7 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. |
| Shareholder Report, Holdings (Details) | Jul. 31, 2024 |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.10% |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15% |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor New York Municipal Income Fund - Class A | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor New York Municipal Income Fund - Class A | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| Fidelity Advisor New York Municipal Income Fund - Class A | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Fidelity Advisor New York Municipal Income Fund - Class A | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor New York Municipal Income Fund - Class A | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor New York Municipal Income Fund - Class A | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor New York Municipal Income Fund - Class A | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.10% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor New York Municipal Income Fund - Class I | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor New York Municipal Income Fund - Class I | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| Fidelity Advisor New York Municipal Income Fund - Class I | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Fidelity Advisor New York Municipal Income Fund - Class I | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor New York Municipal Income Fund - Class I | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor New York Municipal Income Fund - Class I | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor New York Municipal Income Fund - Class I | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity New York Municipal Income Fund | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.10% |
| Fidelity New York Municipal Income Fund | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity New York Municipal Income Fund | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15% |
| Fidelity New York Municipal Income Fund | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity New York Municipal Income Fund | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity New York Municipal Income Fund | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity New York Municipal Income Fund | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity New York Municipal Income Fund | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| Fidelity New York Municipal Income Fund | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Fidelity New York Municipal Income Fund | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity New York Municipal Income Fund | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity New York Municipal Income Fund | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity New York Municipal Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.10% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor New York Municipal Income Fund - Class Z | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.10% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor New York Municipal Income Fund - Class M | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor New York Municipal Income Fund - Class M | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| Fidelity Advisor New York Municipal Income Fund - Class M | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Fidelity Advisor New York Municipal Income Fund - Class M | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor New York Municipal Income Fund - Class M | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor New York Municipal Income Fund - Class M | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor New York Municipal Income Fund - Class M | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.10% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Fidelity Advisor New York Municipal Income Fund - Class C | RS6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Fidelity Advisor New York Municipal Income Fund - Class C | QDAMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| Fidelity Advisor New York Municipal Income Fund - Class C | QDBBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| Fidelity Advisor New York Municipal Income Fund - Class C | QDBBMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Advisor New York Municipal Income Fund - Class C | QDCCCCCCMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Advisor New York Municipal Income Fund - Class C | QDNotRatedMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Fidelity Advisor New York Municipal Income Fund - Class C | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Label | Element | Value |
| C000019549 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.80% |
| C000019549 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 52.60% |
| C000205010 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.80% |
| C000205010 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 52.60% |
| C000019545 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.80% |
| C000019545 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 52.60% |
| C000019544 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.80% |
| C000019544 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 52.60% |
| C000019548 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.80% |
| C000019548 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 52.60% |
| C000019547 [Member] | QDAAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.80% |
| C000019547 [Member] | QDAAMember [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 52.60% |
