| Form N-CSR Cover | 12 Months Ended |
| Jul. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | EATON VANCE MUNICIPALS TRUST |
| Entity Central Index Key | 0000778365 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| Shareholder Report | 12 Months Ended | 119 Months Ended |
| Jul. 31, 2024 USD ($) Holding | Jul. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | ||
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | EATON VANCE MUNICIPALS TRUST | |
| Entity Central Index Key | 0000778365 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Jul. 31, 2024 | |
| C000013133 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Arizona Municipal Income Fund | |
| Class Name | Class A | |
| Trading Symbol | ETAZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Arizona Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $75 0.73% | |
| Expenses Paid, Amount | $ 75 | |
| Expense Ratio, Percent | 0.73% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds outperformed higher-rated bonds ↑ Security selections and an underweight exposure to AAA-rated bonds helped the Fund’s returns as AAA bonds generally underperformed lower-rated bonds ↑ Security selections in the water & sewer sector contributed to the Fund’s Index-relative performance during the period ↓ An underweight position in bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ An underweight position in A-rated bonds hurt Index-relative returns as A-rated bonds generally outperformed higher-rated bonds during the period ↓ Security selections and an overweight position in the electric utilities sector, which underperformed the Index, also weighed on Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B24"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class A with Maximum Sales Charge Bloomberg Municipal Bond Index Bloomberg Arizona Municipal Bond Index 7/14 $9,675 $10,000 $10,000 8/14 $9,784 $10,121 $10,113 9/14 $9,814 $10,131 $10,125 10/14 $9,874 $10,201 $10,190 11/14 $9,853 $10,218 $10,216 12/14 $9,943 $10,270 $10,265 1/15 $10,114 $10,452 $10,451 2/15 $9,990 $10,344 $10,334 3/15 $10,024 $10,374 $10,371 4/15 $9,971 $10,320 $10,322 5/15 $9,928 $10,291 $10,295 6/15 $9,895 $10,282 $10,286 7/15 $9,934 $10,356 $10,362 8/15 $9,942 $10,377 $10,383 9/15 $9,993 $10,452 $10,459 10/15 $10,032 $10,493 $10,507 11/15 $10,104 $10,535 $10,537 12/15 $10,206 $10,609 $10,598 1/16 $10,310 $10,736 $10,737 2/16 $10,284 $10,753 $10,757 3/16 $10,353 $10,787 $10,783 4/16 $10,445 $10,866 $10,860 5/16 $10,482 $10,895 $10,876 6/16 $10,627 $11,069 $11,027 7/16 $10,589 $11,075 $11,038 8/16 $10,658 $11,090 $11,034 9/16 $10,620 $11,035 $10,985 10/16 $10,527 $10,919 $10,890 11/16 $10,163 $10,512 $10,525 12/16 $10,277 $10,635 $10,639 1/17 $10,302 $10,705 $10,706 2/17 $10,352 $10,780 $10,789 3/17 $10,379 $10,803 $10,807 4/17 $10,450 $10,882 $10,897 5/17 $10,607 $11,054 $11,059 6/17 $10,567 $11,015 $11,012 7/17 $10,626 $11,104 $11,088 8/17 $10,696 $11,188 $11,163 9/17 $10,677 $11,131 $11,095 10/17 $10,669 $11,159 $11,125 11/17 $10,639 $11,099 $11,051 12/17 $10,777 $11,215 $11,172 1/18 $10,646 $11,083 $11,038 2/18 $10,594 $11,050 $11,002 3/18 $10,643 $11,090 $11,047 4/18 $10,612 $11,051 $11,007 5/18 $10,745 $11,177 $11,123 6/18 $10,763 $11,187 $11,140 7/18 $10,789 $11,214 $11,157 8/18 $10,792 $11,243 $11,181 9/18 $10,736 $11,170 $11,110 10/18 $10,670 $11,101 $11,051 11/18 $10,764 $11,224 $11,170 12/18 $10,870 $11,359 $11,294 1/19 $10,952 $11,444 $11,380 2/19 $11,013 $11,506 $11,437 3/19 $11,154 $11,688 $11,610 4/19 $11,202 $11,732 $11,652 5/19 $11,319 $11,893 $11,796 6/19 $11,355 $11,937 $11,837 7/19 $11,450 $12,033 $11,936 8/19 $11,602 $12,223 $12,114 9/19 $11,520 $12,125 $11,999 10/19 $11,520 $12,147 $12,031 11/19 $11,533 $12,177 $12,058 12/19 $11,560 $12,215 $12,093 1/20 $11,752 $12,434 $12,308 2/20 $11,910 $12,594 $12,472 3/20 $11,519 $12,137 $11,975 4/20 $11,367 $11,985 $11,922 5/20 $11,729 $12,366 $12,291 6/20 $11,780 $12,468 $12,368 7/20 $11,951 $12,678 $12,543 8/20 $11,893 $12,619 $12,489 9/20 $11,895 $12,621 $12,492 10/20 $11,860 $12,583 $12,455 11/20 $12,031 $12,773 $12,640 12/20 $12,103 $12,851 $12,705 1/21 $12,147 $12,933 $12,761 2/21 $11,936 $12,728 $12,579 3/21 $11,993 $12,806 $12,654 4/21 $12,087 $12,913 $12,745 5/21 $12,143 $12,952 $12,777 6/21 $12,163 $12,988 $12,796 7/21 $12,243 $13,095 $12,904 8/21 $12,212 $13,047 $12,870 9/21 $12,108 $12,953 $12,777 10/21 $12,091 $12,915 $12,746 11/21 $12,174 $13,025 $12,846 12/21 $12,182 $13,046 $12,861 1/22 $11,892 $12,689 $12,522 2/22 $11,839 $12,644 $12,487 3/22 $11,522 $12,234 $12,090 4/22 $11,257 $11,895 $11,741 5/22 $11,341 $12,072 $11,906 6/22 $11,214 $11,874 $11,724 7/22 $11,436 $12,188 $12,018 8/22 $11,218 $11,921 $11,773 9/22 $10,862 $11,463 $11,315 10/22 $10,797 $11,368 $11,219 11/22 $11,201 $11,900 $11,708 12/22 $11,213 $11,934 $11,762 1/23 $11,492 $12,277 $12,068 2/23 $11,238 $11,999 $11,804 3/23 $11,456 $12,265 $12,057 4/23 $11,444 $12,237 $12,018 5/23 $11,356 $12,131 $11,918 6/23 $11,449 $12,253 $12,002 7/23 $11,462 $12,301 $12,067 8/23 $11,349 $12,124 $11,904 9/23 $11,067 $11,769 $11,581 10/23 $10,901 $11,669 $11,498 11/23 $11,595 $12,409 $12,180 12/23 $11,873 $12,698 $12,473 1/24 $11,850 $12,633 $12,397 2/24 $11,867 $12,649 $12,423 3/24 $11,858 $12,649 $12,411 4/24 $11,744 $12,492 $12,277 5/24 $11,762 $12,455 $12,259 6/24 $11,953 $12,646 $12,445 7/24 $12,057 $12,762 $12,544 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 5.15% 1.03% 2.22% Class A with 3.25% Maximum Sales Charge 1.70% 0.36% 1.89% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Arizona Municipal Bond Index 3.95% 1.00% 2.29% | |
| AssetsNet | $ 79,377,824 | $ 79,377,824 |
| Holdings Count | Holding | 91 | 91 |
| Advisory Fees Paid, Amount | $ 232,134 | |
| InvestmentCompanyPortfolioTurnover | 58% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $79,377,824 # of Portfolio Holdings 91 Portfolio Turnover Rate 58% Total Advisory Fees Paid $232,134 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.7% Electric Utilities 5.6% Transportation 5.7% Industrial Development Revenue 7.1% Housing 8.4% Hospital 8.5% Water and Sewer 9.3% Education 11.1% Special Tax Revenue 14.2% General Obligations 24.4% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013135 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Arizona Municipal Income Fund | |
| Class Name | Class C | |
| Trading Symbol | ECAZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Arizona Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B44"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $151 1.48% | |
| Expenses Paid, Amount | $ 151 | |
| Expense Ratio, Percent | 1.48% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds outperformed higher-rated bonds ↑ Security selections and an underweight exposure to AAA-rated bonds helped the Fund’s returns as AAA bonds generally underperformed lower-rated bonds ↑ Security selections in the water & sewer sector contributed to the Fund’s Index-relative performance during the period ↓ An underweight position in bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ An underweight position in A-rated bonds hurt Index-relative returns as A-rated bonds generally outperformed higher-rated bonds during the period ↓ Security selections and an overweight position in the electric utilities sector, which underperformed the Index, also weighed on Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B49"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Bloomberg Arizona Municipal Bond Index 7/14 $10,000 $10,000 $10,000 8/14 $10,117 $10,121 $10,113 9/14 $10,132 $10,131 $10,125 10/14 $10,184 $10,201 $10,190 11/14 $10,162 $10,218 $10,216 12/14 $10,251 $10,270 $10,265 1/15 $10,415 $10,452 $10,451 2/15 $10,289 $10,344 $10,334 3/15 $10,307 $10,374 $10,371 4/15 $10,247 $10,320 $10,322 5/15 $10,204 $10,291 $10,295 6/15 $10,160 $10,282 $10,286 7/15 $10,193 $10,356 $10,362 8/15 $10,188 $10,377 $10,383 9/15 $10,241 $10,452 $10,459 10/15 $10,274 $10,493 $10,507 11/15 $10,346 $10,535 $10,537 12/15 $10,447 $10,609 $10,598 1/16 $10,538 $10,736 $10,737 2/16 $10,511 $10,753 $10,757 3/16 $10,571 $10,787 $10,783 4/16 $10,651 $10,866 $10,860 5/16 $10,682 $10,895 $10,876 6/16 $10,830 $11,069 $11,027 7/16 $10,781 $11,075 $11,038 8/16 $10,850 $11,090 $11,034 9/16 $10,801 $11,035 $10,985 10/16 $10,702 $10,919 $10,890 11/16 $10,326 $10,512 $10,525 12/16 $10,436 $10,635 $10,639 1/17 $10,455 $10,705 $10,706 2/17 $10,497 $10,780 $10,789 3/17 $10,518 $10,803 $10,807 4/17 $10,589 $10,882 $10,897 5/17 $10,728 $11,054 $11,059 6/17 $10,688 $11,015 $11,012 7/17 $10,737 $11,104 $11,088 8/17 $10,806 $11,188 $11,163 9/17 $10,785 $11,131 $11,095 10/17 $10,763 $11,159 $11,125 11/17 $10,723 $11,099 $11,051 12/17 $10,853 $11,215 $11,172 1/18 $10,720 $11,083 $11,038 2/18 $10,660 $11,050 $11,002 3/18 $10,699 $11,090 $11,047 4/18 $10,668 $11,051 $11,007 5/18 $10,794 $11,177 $11,123 6/18 $10,796 $11,187 $11,140 7/18 $10,826 $11,214 $11,157 8/18 $10,824 $11,243 $11,181 9/18 $10,760 $11,170 $11,110 10/18 $10,685 $11,101 $11,051 11/18 $10,776 $11,224 $11,170 12/18 $10,878 $11,359 $11,294 1/19 $10,937 $11,444 $11,380 2/19 $10,998 $11,506 $11,437 3/19 $11,140 $11,688 $11,610 4/19 $11,169 $11,732 $11,652 5/19 $11,280 $11,893 $11,796 6/19 $11,318 $11,937 $11,837 7/19 $11,398 $12,033 $11,936 8/19 $11,551 $12,223 $12,114 9/19 $11,463 $12,125 $11,999 10/19 $11,458 $12,147 $12,031 11/19 $11,454 $12,177 $12,058 12/19 $11,473 $12,215 $12,093 1/20 $11,662 $12,434 $12,308 2/20 $11,810 $12,594 $12,472 3/20 $11,414 $12,137 $11,975 4/20 $11,254 $11,985 $11,922 5/20 $11,604 $12,366 $12,291 6/20 $11,646 $12,468 $12,368 7/20 $11,814 $12,678 $12,543 8/20 $11,747 $12,619 $12,489 9/20 $11,735 $12,621 $12,492 10/20 $11,698 $12,583 $12,455 11/20 $11,867 $12,773 $12,640 12/20 $11,927 $12,851 $12,705 1/21 $11,960 $12,933 $12,761 2/21 $11,747 $12,728 $12,579 3/21 $11,792 $12,806 $12,654 4/21 $11,870 $12,913 $12,745 5/21 $11,925 $12,952 $12,777 6/21 $11,936 $12,988 $12,796 7/21 $12,012 $13,095 $12,904 8/21 $11,968 $13,047 $12,870 9/21 $11,860 $12,953 $12,777 10/21 $11,840 $12,915 $12,746 11/21 $11,919 $13,025 $12,846 12/21 $11,909 $13,046 $12,861 1/22 $11,626 $12,689 $12,522 2/22 $11,564 $12,644 $12,487 3/22 $11,248 $12,234 $12,090 4/22 $10,978 $11,895 $11,741 5/22 $11,058 $12,072 $11,906 6/22 $10,919 $11,874 $11,724 7/22 $11,142 $12,188 $12,018 8/22 $10,913 $11,921 $11,773 9/22 $10,564 $11,463 $11,315 10/22 $10,492 $11,368 $11,219 11/22 $10,885 $11,900 $11,708 12/22 $10,880 $11,934 $11,762 1/23 $11,140 $12,277 $12,068 2/23 $10,893 $11,999 $11,804 3/23 $11,090 $12,265 $12,057 4/23 $11,075 $12,237 $12,018 5/23 $10,983 $12,131 $11,918 6/23 $11,071 $12,253 $12,002 7/23 $11,078 $12,301 $12,067 8/23 $10,964 $12,124 $11,904 9/23 $10,681 $11,769 $11,581 10/23 $10,511 $11,669 $11,498 11/23 $11,178 $12,409 $12,180 12/23 $11,436 $12,698 $12,473 1/24 $11,412 $12,633 $12,397 2/24 $11,412 $12,649 $12,423 3/24 $11,400 $12,649 $12,411 4/24 $11,286 $12,492 $12,277 5/24 $11,285 $12,455 $12,259 6/24 $11,469 $12,646 $12,445 7/24 $11,742 $12,762 $12,544 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 4.37% 0.29% 1.62% Class C with 1% Maximum Deferred Sales Charge 3.37% 0.29% 1.62% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Arizona Municipal Bond Index 3.95% 1.00% 2.29% | |
| AssetsNet | $ 79,377,824 | $ 79,377,824 |
| Holdings Count | Holding | 91 | 91 |
| Advisory Fees Paid, Amount | $ 232,134 | |
| InvestmentCompanyPortfolioTurnover | 58% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $79,377,824 # of Portfolio Holdings 91 Portfolio Turnover Rate 58% Total Advisory Fees Paid $232,134 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.7% Electric Utilities 5.6% Transportation 5.7% Industrial Development Revenue 7.1% Housing 8.4% Hospital 8.5% Water and Sewer 9.3% Education 11.1% Special Tax Revenue 14.2% General Obligations 24.4% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000092720 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Arizona Municipal Income Fund | |
| Class Name | Class I | |
| Trading Symbol | EIAZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Arizona Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B69"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $54 0.53% | |
| Expenses Paid, Amount | $ 54 | |
| Expense Ratio, Percent | 0.53% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds outperformed higher-rated bonds ↑ Security selections and an underweight exposure to AAA-rated bonds helped the Fund’s returns as AAA bonds generally underperformed lower-rated bonds ↑ Security selections in the water & sewer sector contributed to the Fund’s Index-relative performance during the period ↓ An underweight position in bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ An underweight position in A-rated bonds hurt Index-relative returns as A-rated bonds generally outperformed higher-rated bonds during the period ↓ Security selections and an overweight position in the electric utilities sector, which underperformed the Index, also weighed on Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B74"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class I Bloomberg Municipal Bond Index Bloomberg Arizona Municipal Bond Index 7/14 $1,000,000 $1,000,000 $1,000,000 8/14 $1,012,533 $1,012,107 $1,011,325 9/14 $1,015,745 $1,013,136 $1,012,474 10/14 $1,022,090 $1,020,082 $1,019,011 11/14 $1,020,139 $1,021,847 $1,021,573 12/14 $1,029,576 $1,027,003 $1,026,462 1/15 $1,047,501 $1,045,205 $1,045,135 2/15 $1,034,844 $1,034,424 $1,033,362 3/15 $1,038,530 $1,037,411 $1,037,092 4/15 $1,032,097 $1,031,968 $1,032,245 5/15 $1,028,897 $1,029,117 $1,029,526 6/15 $1,025,595 $1,028,179 $1,028,573 7/15 $1,029,833 $1,035,627 $1,036,219 8/15 $1,030,853 $1,037,660 $1,038,333 9/15 $1,036,273 $1,045,177 $1,045,926 10/15 $1,040,538 $1,049,332 $1,050,701 11/15 $1,048,119 $1,053,504 $1,053,746 12/15 $1,058,976 $1,060,906 $1,059,834 1/16 $1,068,800 $1,073,565 $1,073,710 2/16 $1,067,384 $1,075,253 $1,075,722 3/16 $1,074,754 $1,078,659 $1,078,337 4/16 $1,084,419 $1,086,590 $1,086,045 5/16 $1,087,415 $1,089,529 $1,087,626 6/16 $1,103,692 $1,106,862 $1,102,692 7/16 $1,098,816 $1,107,538 $1,103,800 8/16 $1,107,310 $1,109,032 $1,103,417 9/16 $1,103,505 $1,103,497 $1,098,512 10/16 $1,094,069 $1,091,920 $1,088,975 11/16 $1,056,415 $1,051,197 $1,052,510 12/16 $1,068,364 $1,063,538 $1,063,879 1/17 $1,071,220 $1,070,549 $1,070,624 2/17 $1,076,554 $1,077,983 $1,078,944 3/17 $1,079,523 $1,080,323 $1,080,710 4/17 $1,087,104 $1,088,162 $1,089,701 5/17 $1,103,659 $1,105,432 $1,105,868 6/17 $1,099,696 $1,101,468 $1,101,160 7/17 $1,106,005 $1,110,379 $1,108,793 8/17 $1,113,420 $1,118,829 $1,116,322 9/17 $1,111,648 $1,113,141 $1,109,501 10/17 $1,111,021 $1,115,858 $1,112,503 11/17 $1,108,127 $1,109,883 $1,105,123 12/17 $1,122,673 $1,121,483 $1,117,199 1/18 $1,109,214 $1,108,280 $1,103,783 2/18 $1,103,983 $1,104,969 $1,100,193 3/18 $1,109,209 $1,109,047 $1,104,671 4/18 $1,106,223 $1,105,089 $1,100,735 5/18 $1,120,209 $1,117,744 $1,112,329 6/18 $1,122,290 $1,118,698 $1,113,979 7/18 $1,125,223 $1,121,412 $1,115,729 8/18 $1,125,645 $1,124,292 $1,118,100 9/18 $1,120,069 $1,117,014 $1,111,034 10/18 $1,113,300 $1,110,135 $1,105,133 11/18 $1,123,333 $1,122,422 $1,116,971 12/18 $1,134,600 $1,135,861 $1,129,355 1/19 $1,143,358 $1,144,448 $1,138,011 2/19 $1,149,838 $1,150,575 $1,143,657 3/19 $1,164,740 $1,168,763 $1,160,953 4/19 $1,169,966 $1,173,156 $1,165,151 5/19 $1,182,426 $1,189,329 $1,179,649 6/19 $1,186,377 $1,193,721 $1,183,666 7/19 $1,196,462 $1,203,341 $1,193,603 8/19 $1,212,614 $1,222,322 $1,211,395 9/19 $1,204,236 $1,212,524 $1,199,871 10/19 $1,204,446 $1,214,697 $1,203,107 11/19 $1,206,002 $1,217,735 $1,205,832 12/19 $1,208,969 $1,221,453 $1,209,295 1/20 $1,229,328 $1,243,398 $1,230,793 2/20 $1,246,028 $1,259,432 $1,247,229 3/20 $1,205,352 $1,213,749 $1,197,532 4/20 $1,189,657 $1,198,516 $1,192,204 5/20 $1,227,732 $1,236,643 $1,229,056 6/20 $1,233,320 $1,246,821 $1,236,813 7/20 $1,251,431 $1,267,820 $1,254,260 8/20 $1,245,582 $1,261,872 $1,248,873 9/20 $1,244,827 $1,262,139 $1,249,243 10/20 $1,242,551 $1,258,348 $1,245,537 11/20 $1,260,625 $1,277,337 $1,264,026 12/20 $1,268,374 $1,285,118 $1,270,505 1/21 $1,273,164 $1,293,308 $1,276,143 2/21 $1,251,306 $1,272,759 $1,257,894 3/21 $1,257,504 $1,280,608 $1,265,431 4/21 $1,267,539 $1,291,350 $1,274,534 5/21 $1,273,643 $1,295,202 $1,277,689 6/21 $1,275,913 $1,298,759 $1,279,648 7/21 $1,284,492 $1,309,530 $1,290,352 8/21 $1,281,491 $1,304,724 $1,287,029 9/21 $1,270,822 $1,295,309 $1,277,655 10/21 $1,269,251 $1,291,521 $1,274,616 11/21 $1,278,177 $1,302,516 $1,284,602 12/21 $1,279,243 $1,304,617 $1,286,120 1/22 $1,248,924 $1,268,906 $1,252,196 2/22 $1,243,554 $1,264,360 $1,248,733 3/22 $1,210,551 $1,223,373 $1,209,041 4/22 $1,182,892 $1,189,535 $1,174,131 5/22 $1,191,932 $1,207,206 $1,190,626 6/22 $1,178,696 $1,187,434 $1,172,403 7/22 $1,202,241 $1,218,808 $1,201,753 8/22 $1,179,531 $1,192,096 $1,177,302 9/22 $1,142,326 $1,146,342 $1,131,485 10/22 $1,135,705 $1,136,809 $1,121,882 11/22 $1,178,371 $1,189,982 $1,170,816 12/22 $1,179,854 $1,193,388 $1,176,200 1/23 $1,209,360 $1,227,669 $1,206,842 2/23 $1,182,855 $1,199,909 $1,180,446 3/23 $1,205,978 $1,226,532 $1,205,703 4/23 $1,204,954 $1,223,730 $1,201,783 5/23 $1,195,884 $1,213,125 $1,191,827 6/23 $1,205,809 $1,225,277 $1,200,204 7/23 $1,207,460 $1,230,125 $1,206,710 8/23 $1,195,665 $1,212,415 $1,190,361 9/23 $1,166,146 $1,176,881 $1,158,094 10/23 $1,148,877 $1,166,866 $1,149,807 11/23 $1,222,292 $1,240,940 $1,217,971 12/23 $1,251,741 $1,269,782 $1,247,251 1/24 $1,249,522 $1,263,297 $1,239,693 2/24 $1,251,557 $1,264,919 $1,242,278 3/24 $1,250,799 $1,264,879 $1,241,069 4/24 $1,238,969 $1,249,214 $1,227,680 5/24 $1,241,041 $1,245,550 $1,225,944 6/24 $1,261,398 $1,264,642 $1,244,542 7/24 $1,272,165 $1,276,168 $1,254,419 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 5.36% 1.23% 2.43% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Arizona Municipal Bond Index 3.95% 1.00% 2.29% | |
| AssetsNet | $ 79,377,824 | $ 79,377,824 |
| Holdings Count | Holding | 91 | 91 |
| Advisory Fees Paid, Amount | $ 232,134 | |
| InvestmentCompanyPortfolioTurnover | 58% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $79,377,824 # of Portfolio Holdings 91 Portfolio Turnover Rate 58% Total Advisory Fees Paid $232,134 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.7% Electric Utilities 5.6% Transportation 5.7% Industrial Development Revenue 7.1% Housing 8.4% Hospital 8.5% Water and Sewer 9.3% Education 11.1% Special Tax Revenue 14.2% General Obligations 24.4% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013173 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Connecticut Municipal Income Fund | |
| Class Name | Class A | |
| Trading Symbol | ETCTX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Connecticut Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B94"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $73 0.71% | |
| Expenses Paid, Amount | $ 73 | |
| Expense Ratio, Percent | 0.71% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an underweight position in the special tax sector, which underperformed the Index during the period, contributed to returns ↑ Security selections and an underweight position in AA-rated bonds helped Index-relative returns as AA bonds generally underperformed lower-rated bonds ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds generally outperformed higher-rated bonds ↓ An underweight position in bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds generally outperformed shorter-maturity bonds ↓ An overweight position in the education sector, which underperformed the Index, detracted from the Fund’s Index-relative returns during the period ↓ An out-of-Index exposure to bonds with effective maturities of under one year hurt returns as shorter-maturity bonds underperformed longer-maturity bonds | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B99"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class A with Maximum Sales Charge Bloomberg Municipal Bond Index Bloomberg Connecticut Municipal Bond Index 7/14 $9,675 $10,000 $10,000 8/14 $9,817 $10,121 $10,099 9/14 $9,837 $10,131 $10,095 10/14 $9,904 $10,201 $10,151 11/14 $9,895 $10,218 $10,157 12/14 $9,961 $10,270 $10,193 1/15 $10,142 $10,452 $10,345 2/15 $10,037 $10,344 $10,242 3/15 $10,065 $10,374 $10,266 4/15 $10,017 $10,320 $10,222 5/15 $9,989 $10,291 $10,192 6/15 $9,960 $10,282 $10,181 7/15 $10,017 $10,356 $10,242 8/15 $10,016 $10,377 $10,267 9/15 $10,084 $10,452 $10,338 10/15 $10,122 $10,493 $10,374 11/15 $10,171 $10,535 $10,404 12/15 $10,239 $10,609 $10,474 1/16 $10,366 $10,736 $10,601 2/16 $10,386 $10,753 $10,610 3/16 $10,425 $10,787 $10,614 4/16 $10,494 $10,866 $10,683 5/16 $10,493 $10,895 $10,692 6/16 $10,642 $11,069 $10,845 7/16 $10,640 $11,075 $10,853 8/16 $10,718 $11,090 $10,851 9/16 $10,696 $11,035 $10,792 10/16 $10,612 $10,919 $10,670 11/16 $10,302 $10,512 $10,314 12/16 $10,359 $10,635 $10,410 1/17 $10,387 $10,705 $10,474 2/17 $10,436 $10,780 $10,540 3/17 $10,453 $10,803 $10,535 4/17 $10,543 $10,882 $10,629 5/17 $10,633 $11,054 $10,748 6/17 $10,589 $11,015 $10,665 7/17 $10,648 $11,104 $10,739 8/17 $10,697 $11,188 $10,830 9/17 $10,694 $11,131 $10,772 10/17 $10,669 $11,159 $10,809 11/17 $10,614 $11,099 $10,747 12/17 $10,695 $11,215 $10,815 1/18 $10,627 $11,083 $10,719 2/18 $10,582 $11,050 $10,694 3/18 $10,601 $11,090 $10,704 4/18 $10,576 $11,051 $10,685 5/18 $10,659 $11,177 $10,799 6/18 $10,677 $11,187 $10,813 7/18 $10,736 $11,214 $10,860 8/18 $10,762 $11,243 $10,881 9/18 $10,702 $11,170 $10,826 10/18 $10,642 $11,101 $10,783 11/18 $10,735 $11,224 $10,892 12/18 $10,839 $11,359 $11,014 1/19 $10,909 $11,444 $11,108 2/19 $10,959 $11,506 $11,179 3/19 $11,074 $11,688 $11,360 4/19 $11,090 $11,732 $11,410 5/19 $11,216 $11,893 $11,564 6/19 $11,264 $11,937 $11,621 7/19 $11,357 $12,033 $11,734 8/19 $11,505 $12,223 $11,881 9/19 $11,434 $12,125 $11,779 10/19 $11,439 $12,147 $11,816 11/19 $11,443 $12,177 $11,845 12/19 $11,470 $12,215 $11,877 1/20 $11,639 $12,434 $12,076 2/20 $11,767 $12,594 $12,197 3/20 $11,433 $12,137 $11,823 4/20 $11,256 $11,985 $11,664 5/20 $11,542 $12,366 $12,031 6/20 $11,636 $12,468 $12,150 7/20 $11,809 $12,678 $12,357 8/20 $11,765 $12,619 $12,325 9/20 $11,777 $12,621 $12,342 10/20 $11,754 $12,583 $12,319 11/20 $11,906 $12,773 $12,469 12/20 $11,987 $12,851 $12,511 1/21 $12,055 $12,933 $12,563 2/21 $11,872 $12,728 $12,396 3/21 $11,918 $12,806 $12,467 4/21 $11,999 $12,913 $12,536 5/21 $12,044 $12,952 $12,574 6/21 $12,068 $12,988 $12,592 7/21 $12,158 $13,095 $12,703 8/21 $12,120 $13,047 $12,661 9/21 $12,024 $12,953 $12,591 10/21 $11,998 $12,915 $12,547 11/21 $12,090 $13,025 $12,623 12/21 $12,087 $13,046 $12,635 1/22 $11,813 $12,689 $12,325 2/22 $11,753 $12,644 $12,287 3/22 $11,454 $12,234 $11,926 4/22 $11,179 $11,895 $11,664 5/22 $11,282 $12,072 $11,828 6/22 $11,102 $11,874 $11,717 7/22 $11,386 $12,188 $12,002 8/22 $11,098 $11,921 $11,771 9/22 $10,727 $11,463 $11,406 10/22 $10,668 $11,368 $11,352 11/22 $11,184 $11,900 $11,785 12/22 $11,184 $11,934 $11,834 1/23 $11,473 $12,277 $12,110 2/23 $11,208 $11,999 $11,876 3/23 $11,439 $12,265 $12,134 4/23 $11,427 $12,237 $12,075 5/23 $11,319 $12,131 $11,970 6/23 $11,406 $12,253 $12,071 7/23 $11,433 $12,301 $12,098 8/23 $11,288 $12,124 $11,981 9/23 $10,971 $11,769 $11,681 10/23 $10,815 $11,669 $11,638 11/23 $11,547 $12,409 $12,234 12/23 $11,834 $12,698 $12,476 1/24 $11,813 $12,633 $12,416 2/24 $11,830 $12,649 $12,434 3/24 $11,822 $12,649 $12,429 4/24 $11,713 $12,492 $12,290 5/24 $11,705 $12,455 $12,206 6/24 $11,873 $12,646 $12,382 7/24 $11,972 $12,762 $12,505 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 4.67% 1.05% 2.15% Class A with 3.25% Maximum Sales Charge 1.30% 0.39% 1.81% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Connecticut Municipal Bond Index 3.36% 1.28% 2.26% | |
| AssetsNet | $ 115,390,887 | $ 115,390,887 |
| Holdings Count | Holding | 116 | 116 |
| Advisory Fees Paid, Amount | $ 354,241 | |
| InvestmentCompanyPortfolioTurnover | 41% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $115,390,887 # of Portfolio Holdings 116 Portfolio Turnover Rate 41% Total Advisory Fees Paid $354,241 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 6.0% Student Loan 3.1% Water and Sewer 4.3% Special Tax Revenue 6.1% Hospital 8.9% Housing 9.2% Education 27.4% General Obligations 35.0% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013172 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Connecticut Municipal Income Fund | |
| Class Name | Class C | |
| Trading Symbol | ECCTX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Connecticut Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B119"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $149 1.46% | |
| Expenses Paid, Amount | $ 149 | |
| Expense Ratio, Percent | 1.46% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an underweight position in the special tax sector, which underperformed the Index during the period, contributed to returns ↑ Security selections and an underweight position in AA-rated bonds helped Index-relative returns as AA bonds generally underperformed lower-rated bonds ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds generally outperformed higher-rated bonds ↓ An underweight position in bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds generally outperformed shorter-maturity bonds ↓ An overweight position in the education sector, which underperformed the Index, detracted from the Fund’s Index-relative returns during the period ↓ An out-of-Index exposure to bonds with effective maturities of under one year hurt returns as shorter-maturity bonds underperformed longer-maturity bonds | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B124"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Bloomberg Connecticut Municipal Bond Index 7/14 $10,000 $10,000 $10,000 8/14 $10,141 $10,121 $10,099 9/14 $10,155 $10,131 $10,095 10/14 $10,218 $10,201 $10,151 11/14 $10,212 $10,218 $10,157 12/14 $10,264 $10,270 $10,193 1/15 $10,455 $10,452 $10,345 2/15 $10,340 $10,344 $10,242 3/15 $10,353 $10,374 $10,266 4/15 $10,306 $10,320 $10,222 5/15 $10,270 $10,291 $10,192 6/15 $10,224 $10,282 $10,181 7/15 $10,276 $10,356 $10,242 8/15 $10,268 $10,377 $10,267 9/15 $10,332 $10,452 $10,338 10/15 $10,365 $10,493 $10,374 11/15 $10,418 $10,535 $10,404 12/15 $10,472 $10,609 $10,474 1/16 $10,595 $10,736 $10,601 2/16 $10,609 $10,753 $10,610 3/16 $10,642 $10,787 $10,614 4/16 $10,706 $10,866 $10,683 5/16 $10,708 $10,895 $10,692 6/16 $10,844 $11,069 $10,845 7/16 $10,845 $11,075 $10,853 8/16 $10,908 $11,090 $10,851 9/16 $10,878 $11,035 $10,792 10/16 $10,785 $10,919 $10,670 11/16 $10,463 $10,512 $10,314 12/16 $10,525 $10,635 $10,410 1/17 $10,536 $10,705 $10,474 2/17 $10,579 $10,780 $10,540 3/17 $10,601 $10,803 $10,535 4/17 $10,675 $10,882 $10,629 5/17 $10,760 $11,054 $10,748 6/17 $10,718 $11,015 $10,665 7/17 $10,761 $11,104 $10,739 8/17 $10,804 $11,188 $10,830 9/17 $10,794 $11,131 $10,772 10/17 $10,762 $11,159 $10,809 11/17 $10,699 $11,099 $10,747 12/17 $10,775 $11,215 $10,815 1/18 $10,699 $11,083 $10,719 2/18 $10,658 $11,050 $10,694 3/18 $10,659 $11,090 $10,704 4/18 $10,638 $11,051 $10,685 5/18 $10,704 $11,177 $10,799 6/18 $10,727 $11,187 $10,813 7/18 $10,768 $11,214 $10,860 8/18 $10,798 $11,243 $10,881 9/18 $10,720 $11,170 $10,826 10/18 $10,653 $11,101 $10,783 11/18 $10,740 $11,224 $10,892 12/18 $10,837 $11,359 $11,014 1/19 $10,901 $11,444 $11,108 2/19 $10,944 $11,506 $11,179 3/19 $11,052 $11,688 $11,360 4/19 $11,072 $11,732 $11,410 5/19 $11,191 $11,893 $11,564 6/19 $11,232 $11,937 $11,621 7/19 $11,307 $12,033 $11,734 8/19 $11,459 $12,223 $11,881 9/19 $11,380 $12,125 $11,779 10/19 $11,366 $12,147 $11,816 11/19 $11,374 $12,177 $11,845 12/19 $11,393 $12,215 $11,877 1/20 $11,555 $12,434 $12,076 2/20 $11,664 $12,594 $12,197 3/20 $11,324 $12,137 $11,823 4/20 $11,142 $11,985 $11,664 5/20 $11,430 $12,366 $12,031 6/20 $11,517 $12,468 $12,150 7/20 $11,670 $12,678 $12,357 8/20 $11,629 $12,619 $12,325 9/20 $11,623 $12,621 $12,342 10/20 $11,593 $12,583 $12,319 11/20 $11,736 $12,773 $12,469 12/20 $11,808 $12,851 $12,511 1/21 $11,868 $12,933 $12,563 2/21 $11,680 $12,728 $12,396 3/21 $11,718 $12,806 $12,467 4/21 $11,790 $12,913 $12,536 5/21 $11,828 $12,952 $12,574 6/21 $11,843 $12,988 $12,592 7/21 $11,925 $13,095 $12,703 8/21 $11,880 $13,047 $12,661 9/21 $11,778 $12,953 $12,591 10/21 $11,745 $12,915 $12,547 11/21 $11,827 $13,025 $12,623 12/21 $11,829 $13,046 $12,635 1/22 $11,541 $12,689 $12,325 2/22 $11,475 $12,644 $12,287 3/22 $11,186 $12,234 $11,926 4/22 $10,898 $11,895 $11,664 5/22 $11,004 $12,072 $11,828 6/22 $10,821 $11,874 $11,717 7/22 $11,091 $12,188 $12,002 8/22 $10,803 $11,921 $11,771 9/22 $10,423 $11,463 $11,406 10/22 $10,370 $11,368 $11,352 11/22 $10,855 $11,900 $11,785 12/22 $10,860 $11,934 $11,834 1/23 $11,122 $12,277 $12,110 2/23 $10,858 $11,999 $11,876 3/23 $11,075 $12,265 $12,134 4/23 $11,069 $12,237 $12,075 5/23 $10,944 $12,131 $11,970 6/23 $11,022 $12,253 $12,071 7/23 $11,053 $12,301 $12,098 8/23 $10,906 $12,124 $11,981 9/23 $10,580 $11,769 $11,681 10/23 $10,433 $11,669 $11,638 11/23 $11,124 $12,409 $12,234 12/23 $11,394 $12,698 $12,476 1/24 $11,379 $12,633 $12,416 2/24 $11,376 $12,649 $12,434 3/24 $11,361 $12,649 $12,429 4/24 $11,261 $12,492 $12,290 5/24 $11,246 $12,455 $12,206 6/24 $11,389 $12,646 $12,382 7/24 $11,659 $12,762 $12,505 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 3.89% 0.31% 1.55% Class C with 1% Maximum Deferred Sales Charge 2.89% 0.31% 1.55% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Connecticut Municipal Bond Index 3.36% 1.28% 2.26% | |
| AssetsNet | $ 115,390,887 | $ 115,390,887 |
| Holdings Count | Holding | 116 | 116 |
| Advisory Fees Paid, Amount | $ 354,241 | |
| InvestmentCompanyPortfolioTurnover | 41% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $115,390,887 # of Portfolio Holdings 116 Portfolio Turnover Rate 41% Total Advisory Fees Paid $354,241 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 6.0% Student Loan 3.1% Water and Sewer 4.3% Special Tax Revenue 6.1% Hospital 8.9% Housing 9.2% Education 27.4% General Obligations 35.0% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000063955 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Connecticut Municipal Income Fund | |
| Class Name | Class I | |
| Trading Symbol | EICTX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Connecticut Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B144"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $52 0.51% | |
| Expenses Paid, Amount | $ 52 | |
| Expense Ratio, Percent | 0.51% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an underweight position in the special tax sector, which underperformed the Index during the period, contributed to returns ↑ Security selections and an underweight position in AA-rated bonds helped Index-relative returns as AA bonds generally underperformed lower-rated bonds ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds generally outperformed higher-rated bonds ↓ An underweight position in bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds generally outperformed shorter-maturity bonds ↓ An overweight position in the education sector, which underperformed the Index, detracted from the Fund’s Index-relative returns during the period ↓ An out-of-Index exposure to bonds with effective maturities of under one year hurt returns as shorter-maturity bonds underperformed longer-maturity bonds | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B149"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class I Bloomberg Municipal Bond Index Bloomberg Connecticut Municipal Bond Index 7/14 $1,000,000 $1,000,000 $1,000,000 8/14 $1,014,855 $1,012,107 $1,009,882 9/14 $1,017,068 $1,013,136 $1,009,478 10/14 $1,024,175 $1,020,082 $1,015,112 11/14 $1,024,376 $1,021,847 $1,015,710 12/14 $1,030,470 $1,027,003 $1,019,268 1/15 $1,050,363 $1,045,205 $1,034,529 2/15 $1,039,590 $1,034,424 $1,024,200 3/15 $1,041,760 $1,037,411 $1,026,594 4/15 $1,037,938 $1,031,968 $1,022,232 5/15 $1,035,172 $1,029,117 $1,019,197 6/15 $1,031,354 $1,028,179 $1,018,066 7/15 $1,037,414 $1,035,627 $1,024,177 8/15 $1,037,475 $1,037,660 $1,026,670 9/15 $1,044,696 $1,045,177 $1,033,806 10/15 $1,048,845 $1,049,332 $1,037,391 11/15 $1,055,086 $1,053,504 $1,040,400 12/15 $1,061,334 $1,060,906 $1,047,358 1/16 $1,074,690 $1,073,565 $1,060,149 2/16 $1,076,889 $1,075,253 $1,061,006 3/16 $1,081,116 $1,078,659 $1,061,417 4/16 $1,088,474 $1,086,590 $1,068,322 5/16 $1,088,517 $1,089,529 $1,069,209 6/16 $1,104,218 $1,106,862 $1,084,463 7/16 $1,104,125 $1,107,538 $1,085,314 8/16 $1,112,465 $1,109,032 $1,085,145 9/16 $1,110,323 $1,103,497 $1,079,162 10/16 $1,101,787 $1,091,920 $1,066,976 11/16 $1,069,820 $1,051,197 $1,031,377 12/16 $1,075,953 $1,063,538 $1,041,024 1/17 $1,078,999 $1,070,549 $1,047,361 2/17 $1,084,227 $1,077,983 $1,053,977 3/17 $1,087,295 $1,080,323 $1,053,457 4/17 $1,095,742 $1,088,162 $1,062,899 5/17 $1,105,299 $1,105,432 $1,074,844 6/17 $1,101,948 $1,101,468 $1,066,533 7/17 $1,107,240 $1,110,379 $1,073,922 8/17 $1,112,498 $1,118,829 $1,082,957 9/17 $1,112,334 $1,113,141 $1,077,216 10/17 $1,109,984 $1,115,858 $1,080,878 11/17 $1,104,383 $1,109,883 $1,074,750 12/17 $1,113,059 $1,121,483 $1,081,504 1/18 $1,106,129 $1,108,280 $1,071,894 2/18 $1,102,773 $1,104,969 $1,069,423 3/18 $1,103,764 $1,109,047 $1,070,449 4/18 $1,101,403 $1,105,089 $1,068,549 5/18 $1,110,166 $1,117,744 $1,079,859 6/18 $1,112,294 $1,118,698 $1,081,295 7/18 $1,118,602 $1,121,412 $1,086,040 8/18 $1,121,503 $1,124,292 $1,088,061 9/18 $1,115,469 $1,117,014 $1,082,581 10/18 $1,109,426 $1,110,135 $1,078,257 11/18 $1,119,272 $1,122,422 $1,089,226 12/18 $1,130,321 $1,135,861 $1,101,370 1/19 $1,137,816 $1,144,448 $1,110,791 2/19 $1,143,191 $1,150,575 $1,117,925 3/19 $1,155,326 $1,168,763 $1,135,985 4/19 $1,157,226 $1,173,156 $1,141,046 5/19 $1,171,685 $1,189,329 $1,156,373 6/19 $1,176,935 $1,193,721 $1,162,117 7/19 $1,185,680 $1,203,341 $1,173,423 8/19 $1,202,537 $1,222,322 $1,188,059 9/19 $1,194,057 $1,212,524 $1,177,892 10/19 $1,194,781 $1,214,697 $1,181,610 11/19 $1,196,621 $1,217,735 $1,184,545 12/19 $1,198,390 $1,221,453 $1,187,732 1/20 $1,217,487 $1,243,398 $1,207,566 2/20 $1,229,902 $1,259,432 $1,219,670 3/20 $1,195,149 $1,213,749 $1,182,330 4/20 $1,176,908 $1,198,516 $1,166,444 5/20 $1,208,203 $1,236,643 $1,203,142 6/20 $1,218,267 $1,246,821 $1,215,010 7/20 $1,235,424 $1,267,820 $1,235,684 8/20 $1,232,136 $1,261,872 $1,232,478 9/20 $1,232,424 $1,262,139 $1,234,150 10/20 $1,230,275 $1,258,348 $1,231,858 11/20 $1,246,340 $1,277,337 $1,246,868 12/20 $1,255,001 $1,285,118 $1,251,055 1/21 $1,262,359 $1,293,308 $1,256,251 2/21 $1,243,347 $1,272,759 $1,239,614 3/21 $1,248,367 $1,280,608 $1,246,690 4/21 $1,257,053 $1,291,350 $1,253,597 5/21 $1,262,057 $1,295,202 $1,257,448 6/21 $1,264,704 $1,298,759 $1,259,219 7/21 $1,274,440 $1,309,530 $1,270,324 8/21 $1,270,683 $1,304,724 $1,266,056 9/21 $1,260,831 $1,295,309 $1,259,050 10/21 $1,258,302 $1,291,521 $1,254,662 11/21 $1,268,092 $1,302,516 $1,262,349 12/21 $1,269,256 $1,304,617 $1,263,472 1/22 $1,239,507 $1,268,906 $1,232,460 2/22 $1,233,340 $1,264,360 $1,228,693 3/22 $1,203,417 $1,223,373 $1,192,593 4/22 $1,173,499 $1,189,535 $1,166,403 5/22 $1,184,542 $1,207,206 $1,182,834 6/22 $1,167,051 $1,187,434 $1,171,716 7/22 $1,195,829 $1,218,808 $1,200,166 8/22 $1,165,851 $1,192,096 $1,177,070 9/22 $1,127,080 $1,146,342 $1,140,595 10/22 $1,120,990 $1,136,809 $1,135,194 11/22 $1,175,428 $1,189,982 $1,178,476 12/22 $1,176,930 $1,193,388 $1,183,368 1/23 $1,206,198 $1,227,669 $1,210,987 2/23 $1,178,558 $1,199,909 $1,187,639 3/23 $1,203,017 $1,226,532 $1,213,403 4/23 $1,202,032 $1,223,730 $1,207,505 5/23 $1,190,783 $1,213,125 $1,196,978 6/23 $1,200,135 $1,225,277 $1,207,122 7/23 $1,203,190 $1,230,125 $1,209,841 8/23 $1,189,446 $1,212,415 $1,198,143 9/23 $1,155,036 $1,176,881 $1,168,116 10/23 $1,138,704 $1,166,866 $1,163,806 11/23 $1,215,998 $1,240,940 $1,223,371 12/23 $1,246,492 $1,269,782 $1,247,589 1/24 $1,244,457 $1,263,297 $1,241,561 2/24 $1,246,429 $1,264,919 $1,243,371 3/24 $1,245,828 $1,264,879 $1,242,867 4/24 $1,235,871 $1,249,214 $1,229,047 5/24 $1,235,179 $1,245,550 $1,220,579 6/24 $1,251,823 $1,264,642 $1,238,210 7/24 $1,263,266 $1,276,168 $1,250,542 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 4.99% 1.27% 2.36% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Connecticut Municipal Bond Index 3.36% 1.28% 2.26% | |
| AssetsNet | $ 115,390,887 | $ 115,390,887 |
| Holdings Count | Holding | 116 | 116 |
| Advisory Fees Paid, Amount | $ 354,241 | |
| InvestmentCompanyPortfolioTurnover | 41% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $115,390,887 # of Portfolio Holdings 116 Portfolio Turnover Rate 41% Total Advisory Fees Paid $354,241 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 6.0% Student Loan 3.1% Water and Sewer 4.3% Special Tax Revenue 6.1% Hospital 8.9% Housing 9.2% Education 27.4% General Obligations 35.0% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013114 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Minnesota Municipal Income Fund | |
| Class Name | Class A | |
| Trading Symbol | ETMNX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Minnesota Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B169"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $72 0.71% | |
| Expenses Paid, Amount | $ 72 | |
| Expense Ratio, Percent | 0.71% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight exposure to bonds with 17+ years to maturity helped as longer-maturity bonds outperformed shorter-maturity bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to the Fund’s performance ↑ Security selections and an underweight position in AA-rated bonds helped returns during a period when AA-rated bonds underperformed lower-rated bonds ↓ Security selections and an underweight position in BBB-rated bonds detracted from returns as lower-rated bonds generally outperformed higher-rated bonds ↓ Security selections in bonds with 4-6 years remaining to maturity detracted from the Fund’s Index-relative performance during the period ↓ An underweight position in the transportation sector, which outperformed the Index during the period, detracted from the Fund’s Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B174"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class A with Maximum Sales Charge Bloomberg Municipal Bond Index Bloomberg Minnesota Municipal Bond Index 7/14 $9,675 $10,000 $10,000 8/14 $9,772 $10,121 $10,096 9/14 $9,809 $10,131 $10,087 10/14 $9,836 $10,201 $10,140 11/14 $9,822 $10,218 $10,151 12/14 $9,868 $10,270 $10,195 1/15 $9,996 $10,452 $10,364 2/15 $9,951 $10,344 $10,255 3/15 $9,957 $10,374 $10,292 4/15 $9,931 $10,320 $10,249 5/15 $9,916 $10,291 $10,227 6/15 $9,922 $10,282 $10,232 7/15 $9,959 $10,356 $10,302 8/15 $9,975 $10,377 $10,333 9/15 $10,034 $10,452 $10,404 10/15 $10,071 $10,493 $10,436 11/15 $10,110 $10,535 $10,452 12/15 $10,168 $10,609 $10,503 1/16 $10,257 $10,736 $10,625 2/16 $10,249 $10,753 $10,646 3/16 $10,284 $10,787 $10,660 4/16 $10,363 $10,866 $10,723 5/16 $10,376 $10,895 $10,733 6/16 $10,518 $11,069 $10,881 7/16 $10,499 $11,075 $10,887 8/16 $10,523 $11,090 $10,892 9/16 $10,472 $11,035 $10,832 10/16 $10,377 $10,919 $10,742 11/16 $10,037 $10,512 $10,352 12/16 $10,149 $10,635 $10,471 1/17 $10,172 $10,705 $10,546 2/17 $10,218 $10,780 $10,638 3/17 $10,240 $10,803 $10,659 4/17 $10,307 $10,882 $10,733 5/17 $10,473 $11,054 $10,864 6/17 $10,431 $11,015 $10,820 7/17 $10,476 $11,104 $10,905 8/17 $10,542 $11,188 $10,962 9/17 $10,499 $11,131 $10,904 10/17 $10,500 $11,159 $10,925 11/17 $10,467 $11,099 $10,839 12/17 $10,567 $11,215 $10,946 1/18 $10,412 $11,083 $10,833 2/18 $10,358 $11,050 $10,807 3/18 $10,414 $11,090 $10,833 4/18 $10,368 $11,051 $10,803 5/18 $10,481 $11,177 $10,899 6/18 $10,481 $11,187 $10,910 7/18 $10,492 $11,214 $10,939 8/18 $10,514 $11,243 $10,952 9/18 $10,445 $11,170 $10,883 10/18 $10,376 $11,101 $10,830 11/18 $10,479 $11,224 $10,952 12/18 $10,605 $11,359 $11,096 1/19 $10,684 $11,444 $11,182 2/19 $10,741 $11,506 $11,240 3/19 $10,877 $11,688 $11,395 4/19 $10,909 $11,732 $11,418 5/19 $11,033 $11,893 $11,557 6/19 $11,076 $11,937 $11,606 7/19 $11,165 $12,033 $11,703 8/19 $11,336 $12,223 $11,865 9/19 $11,251 $12,125 $11,761 10/19 $11,246 $12,147 $11,784 11/19 $11,255 $12,177 $11,810 12/19 $11,286 $12,215 $11,836 1/20 $11,456 $12,434 $12,033 2/20 $11,568 $12,594 $12,159 3/20 $11,270 $12,137 $11,855 4/20 $11,135 $11,985 $11,730 5/20 $11,471 $12,366 $12,103 6/20 $11,512 $12,468 $12,146 7/20 $11,659 $12,678 $12,314 8/20 $11,616 $12,619 $12,252 9/20 $11,621 $12,621 $12,263 10/20 $11,579 $12,583 $12,234 11/20 $11,717 $12,773 $12,391 12/20 $11,757 $12,851 $12,442 1/21 $11,798 $12,933 $12,487 2/21 $11,637 $12,728 $12,317 3/21 $11,677 $12,806 $12,376 4/21 $11,754 $12,913 $12,472 5/21 $11,782 $12,952 $12,487 6/21 $11,799 $12,988 $12,509 7/21 $11,888 $13,095 $12,613 8/21 $11,855 $13,047 $12,562 9/21 $11,775 $12,953 $12,478 10/21 $11,754 $12,915 $12,432 11/21 $11,818 $13,025 $12,528 12/21 $11,821 $13,046 $12,548 1/22 $11,569 $12,689 $12,227 2/22 $11,524 $12,644 $12,194 3/22 $11,259 $12,234 $11,834 4/22 $11,031 $11,895 $11,543 5/22 $11,170 $12,072 $11,689 6/22 $11,043 $11,874 $11,527 7/22 $11,256 $12,188 $11,804 8/22 $11,053 $11,921 $11,583 9/22 $10,717 $11,463 $11,183 10/22 $10,664 $11,368 $11,088 11/22 $11,055 $11,900 $11,579 12/22 $11,064 $11,934 $11,624 1/23 $11,320 $12,277 $11,917 2/23 $11,108 $11,999 $11,678 3/23 $11,292 $12,265 $11,924 4/23 $11,265 $12,237 $11,877 5/23 $11,165 $12,131 $11,750 6/23 $11,252 $12,253 $11,813 7/23 $11,261 $12,301 $11,878 8/23 $11,137 $12,124 $11,730 9/23 $10,787 $11,769 $11,366 10/23 $10,626 $11,669 $11,298 11/23 $11,377 $12,409 $11,984 12/23 $11,621 $12,698 $12,214 1/24 $11,599 $12,633 $12,144 2/24 $11,604 $12,649 $12,172 3/24 $11,583 $12,649 $12,151 4/24 $11,472 $12,492 $12,007 5/24 $11,477 $12,455 $11,935 6/24 $11,624 $12,646 $12,130 7/24 $11,708 $12,762 $12,257 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 3.95% 0.95% 1.92% Class A with 3.25% Maximum Sales Charge 0.58% 0.29% 1.59% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Minnesota Municipal Bond Index 3.19% 0.93% 2.05% | |
| AssetsNet | $ 247,709,568 | $ 247,709,568 |
| Holdings Count | Holding | 152 | 152 |
| Advisory Fees Paid, Amount | $ 887,103 | |
| InvestmentCompanyPortfolioTurnover | 48% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $247,709,568 # of Portfolio Holdings 152 Portfolio Turnover Rate 48% Total Advisory Fees Paid $887,103 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 14.0% Transportation 4.9% Education 11.8% Electric Utilities 14.6% Hospital 18.3% General Obligations 36.4% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013116 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Minnesota Municipal Income Fund | |
| Class Name | Class C | |
| Trading Symbol | ECMNX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Minnesota Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B194"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $148 1.46% | |
| Expenses Paid, Amount | $ 148 | |
| Expense Ratio, Percent | 1.46% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↓ Security selections and an underweight position in BBB-rated bonds detracted from returns as lower-rated bonds generally outperformed higher-rated bonds ↓ Security selections in bonds with 4-6 years remaining to maturity detracted from the Fund’s Index-relative performance during the period ↓ An underweight position in the transportation sector, which outperformed the Index during the period, detracted from the Fund’s Index-relative returns ↑ Security selections and an overweight exposure to bonds with 17+ years to maturity helped as longer-maturity bonds outperformed shorter-maturity bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to the Fund’s performance ↑ Security selections and an underweight position in AA-rated bonds helped returns during a period when AA-rated bonds underperformed lower-rated bonds | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B199"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Bloomberg Minnesota Municipal Bond Index 7/14 $10,000 $10,000 $10,000 8/14 $10,099 $10,121 $10,096 9/14 $10,120 $10,131 $10,087 10/14 $10,151 $10,201 $10,140 11/14 $10,133 $10,218 $10,151 12/14 $10,173 $10,270 $10,195 1/15 $10,301 $10,452 $10,364 2/15 $10,244 $10,344 $10,255 3/15 $10,244 $10,374 $10,292 4/15 $10,206 $10,320 $10,249 5/15 $10,187 $10,291 $10,227 6/15 $10,188 $10,282 $10,232 7/15 $10,219 $10,356 $10,302 8/15 $10,230 $10,377 $10,333 9/15 $10,291 $10,452 $10,404 10/15 $10,322 $10,493 $10,436 11/15 $10,345 $10,535 $10,452 12/15 $10,406 $10,609 $10,503 1/16 $10,485 $10,736 $10,625 2/16 $10,472 $10,753 $10,646 3/16 $10,502 $10,787 $10,660 4/16 $10,572 $10,866 $10,723 5/16 $10,579 $10,895 $10,733 6/16 $10,719 $11,069 $10,881 7/16 $10,686 $11,075 $10,887 8/16 $10,703 $11,090 $10,892 9/16 $10,650 $11,035 $10,832 10/16 $10,556 $10,919 $10,742 11/16 $10,199 $10,512 $10,352 12/16 $10,310 $10,635 $10,471 1/17 $10,327 $10,705 $10,546 2/17 $10,366 $10,780 $10,638 3/17 $10,382 $10,803 $10,659 4/17 $10,441 $10,882 $10,733 5/17 $10,592 $11,054 $10,864 6/17 $10,547 $11,015 $10,820 7/17 $10,595 $11,104 $10,905 8/17 $10,652 $11,188 $10,962 9/17 $10,607 $11,131 $10,904 10/17 $10,602 $11,159 $10,925 11/17 $10,546 $11,099 $10,839 12/17 $10,656 $11,215 $10,946 1/18 $10,484 $11,083 $10,833 2/18 $10,429 $11,050 $10,807 3/18 $10,476 $11,090 $10,833 4/18 $10,418 $11,051 $10,803 5/18 $10,529 $11,177 $10,899 6/18 $10,514 $11,187 $10,910 7/18 $10,529 $11,214 $10,939 8/18 $10,534 $11,243 $10,952 9/18 $10,465 $11,170 $10,883 10/18 $10,386 $11,101 $10,830 11/18 $10,487 $11,224 $10,952 12/18 $10,610 $11,359 $11,096 1/19 $10,689 $11,444 $11,182 2/19 $10,727 $11,506 $11,240 3/19 $10,858 $11,688 $11,395 4/19 $10,883 $11,732 $11,418 5/19 $11,003 $11,893 $11,557 6/19 $11,038 $11,937 $11,606 7/19 $11,115 $12,033 $11,703 8/19 $11,278 $12,223 $11,865 9/19 $11,183 $12,125 $11,761 10/19 $11,183 $12,147 $11,784 11/19 $11,186 $12,177 $11,810 12/19 $11,209 $12,215 $11,836 1/20 $11,360 $12,434 $12,033 2/20 $11,469 $12,594 $12,159 3/20 $11,166 $12,137 $11,855 4/20 $11,036 $11,985 $11,730 5/20 $11,361 $12,366 $12,103 6/20 $11,394 $12,468 $12,146 7/20 $11,522 $12,678 $12,314 8/20 $11,477 $12,619 $12,252 9/20 $11,476 $12,621 $12,263 10/20 $11,431 $12,583 $12,234 11/20 $11,551 $12,773 $12,391 12/20 $11,582 $12,851 $12,442 1/21 $11,624 $12,933 $12,487 2/21 $11,449 $12,728 $12,317 3/21 $11,491 $12,806 $12,376 4/21 $11,555 $12,913 $12,472 5/21 $11,575 $12,952 $12,487 6/21 $11,585 $12,988 $12,509 7/21 $11,659 $13,095 $12,613 8/21 $11,623 $13,047 $12,562 9/21 $11,544 $12,953 $12,478 10/21 $11,507 $12,915 $12,432 11/21 $11,560 $13,025 $12,528 12/21 $11,556 $13,046 $12,548 1/22 $11,309 $12,689 $12,227 2/22 $11,252 $12,644 $12,194 3/22 $10,994 $12,234 $11,834 4/22 $10,771 $11,895 $11,543 5/22 $10,891 $12,072 $11,689 6/22 $10,759 $11,874 $11,527 7/22 $10,958 $12,188 $11,804 8/22 $10,758 $11,921 $11,583 9/22 $10,426 $11,463 $11,183 10/22 $10,362 $11,368 $11,088 11/22 $10,744 $11,900 $11,579 12/22 $10,747 $11,934 $11,624 1/23 $10,983 $12,277 $11,917 2/23 $10,765 $11,999 $11,678 3/23 $10,936 $12,265 $11,924 4/23 $10,907 $12,237 $11,877 5/23 $10,811 $12,131 $11,750 6/23 $10,885 $12,253 $11,813 7/23 $10,888 $12,301 $11,878 8/23 $10,759 $12,124 $11,730 9/23 $10,406 $11,769 $11,366 10/23 $10,246 $11,669 $11,298 11/23 $10,972 $12,409 $11,984 12/23 $11,197 $12,698 $12,214 1/24 $11,161 $12,633 $12,144 2/24 $11,161 $12,649 $12,172 3/24 $11,137 $12,649 $12,151 4/24 $11,033 $12,492 $12,007 5/24 $11,021 $12,455 $11,935 6/24 $11,159 $12,646 $12,130 7/24 $11,396 $12,762 $12,257 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 3.11% 0.20% 1.31% Class C with 1% Maximum Deferred Sales Charge 2.11% 0.20% 1.31% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Minnesota Municipal Bond Index 3.19% 0.93% 2.05% | |
| AssetsNet | $ 247,709,568 | $ 247,709,568 |
| Holdings Count | Holding | 152 | 152 |
| Advisory Fees Paid, Amount | $ 887,103 | |
| InvestmentCompanyPortfolioTurnover | 48% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $247,709,568 # of Portfolio Holdings 152 Portfolio Turnover Rate 48% Total Advisory Fees Paid $887,103 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 14.0% Transportation 4.9% Education 11.8% Electric Utilities 14.6% Hospital 18.3% General Obligations 36.4% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000092718 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Minnesota Municipal Income Fund | |
| Class Name | Class I | |
| Trading Symbol | EIMNX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Minnesota Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B219"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $52 0.51% | |
| Expenses Paid, Amount | $ 52 | |
| Expense Ratio, Percent | 0.51% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight exposure to bonds with 17+ years to maturity helped as longer-maturity bonds outperformed shorter-maturity bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to the Fund’s performance ↑ Security selections and an underweight position in AA-rated bonds helped returns during a period when AA-rated bonds underperformed lower-rated bonds ↓ Security selections and an underweight position in BBB-rated bonds detracted from returns as lower-rated bonds generally outperformed higher-rated bonds ↓ Security selections in bonds with 4-6 years remaining to maturity detracted from the Fund’s Index-relative performance during the period ↓ An underweight position in the transportation sector, which outperformed the Index during the period, detracted from the Fund’s Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B224"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class I Bloomberg Municipal Bond Index Bloomberg Minnesota Municipal Bond Index 7/14 $1,000,000 $1,000,000 $1,000,000 8/14 $1,010,239 $1,012,107 $1,009,632 9/14 $1,014,214 $1,013,136 $1,008,729 10/14 $1,017,127 $1,020,082 $1,014,041 11/14 $1,015,845 $1,021,847 $1,015,074 12/14 $1,020,835 $1,027,003 $1,019,505 1/15 $1,034,273 $1,045,205 $1,036,414 2/15 $1,029,737 $1,034,424 $1,025,483 3/15 $1,030,482 $1,037,411 $1,029,214 4/15 $1,028,052 $1,031,968 $1,024,880 5/15 $1,026,671 $1,029,117 $1,022,698 6/15 $1,027,437 $1,028,179 $1,023,193 7/15 $1,031,460 $1,035,627 $1,030,153 8/15 $1,033,262 $1,037,660 $1,033,339 9/15 $1,039,519 $1,045,177 $1,040,357 10/15 $1,043,512 $1,049,332 $1,043,589 11/15 $1,047,772 $1,053,504 $1,045,195 12/15 $1,055,045 $1,060,906 $1,050,317 1/16 $1,063,289 $1,073,565 $1,062,514 2/16 $1,062,612 $1,075,253 $1,064,574 3/16 $1,066,506 $1,078,659 $1,066,050 4/16 $1,074,836 $1,086,590 $1,072,343 5/16 $1,076,402 $1,089,529 $1,073,292 6/16 $1,091,283 $1,106,862 $1,088,123 7/16 $1,089,490 $1,107,538 $1,088,655 8/16 $1,092,171 $1,109,032 $1,089,174 9/16 $1,087,046 $1,103,497 $1,083,215 10/16 $1,077,410 $1,091,920 $1,074,157 11/16 $1,042,269 $1,051,197 $1,035,231 12/16 $1,053,995 $1,063,538 $1,047,132 1/17 $1,056,659 $1,070,549 $1,054,618 2/17 $1,061,531 $1,077,983 $1,063,805 3/17 $1,065,201 $1,080,323 $1,065,904 4/17 $1,071,210 $1,088,162 $1,073,275 5/17 $1,088,617 $1,105,432 $1,086,391 6/17 $1,084,413 $1,101,468 $1,082,022 7/17 $1,089,242 $1,110,379 $1,090,492 8/17 $1,096,366 $1,118,829 $1,096,151 9/17 $1,092,039 $1,113,141 $1,090,447 10/17 $1,092,305 $1,115,858 $1,092,495 11/17 $1,089,061 $1,109,883 $1,083,893 12/17 $1,099,721 $1,121,483 $1,094,603 1/18 $1,083,778 $1,108,280 $1,083,270 2/18 $1,078,292 $1,104,969 $1,080,664 3/18 $1,084,240 $1,109,047 $1,083,318 4/18 $1,079,705 $1,105,089 $1,080,285 5/18 $1,091,592 $1,117,744 $1,089,871 6/18 $1,091,790 $1,118,698 $1,090,960 7/18 $1,093,122 $1,121,412 $1,093,898 8/18 $1,095,578 $1,124,292 $1,095,163 9/18 $1,088,614 $1,117,014 $1,088,328 10/18 $1,081,637 $1,110,135 $1,082,970 11/18 $1,092,572 $1,122,422 $1,095,157 12/18 $1,105,821 $1,135,861 $1,109,629 1/19 $1,115,463 $1,144,448 $1,118,155 2/19 $1,120,416 $1,150,575 $1,123,981 3/19 $1,134,758 $1,168,763 $1,139,524 4/19 $1,138,323 $1,173,156 $1,141,833 5/19 $1,151,408 $1,189,329 $1,155,735 6/19 $1,156,125 $1,193,721 $1,160,641 7/19 $1,165,644 $1,203,341 $1,170,289 8/19 $1,183,634 $1,222,322 $1,186,461 9/19 $1,174,954 $1,212,524 $1,176,055 10/19 $1,174,692 $1,214,697 $1,178,376 11/19 $1,175,776 $1,217,735 $1,180,993 12/19 $1,179,261 $1,221,453 $1,183,621 1/20 $1,197,170 $1,243,398 $1,203,347 2/20 $1,209,103 $1,259,432 $1,215,945 3/20 $1,178,078 $1,213,749 $1,185,453 4/20 $1,164,186 $1,198,516 $1,172,975 5/20 $1,199,505 $1,236,643 $1,210,340 6/20 $1,204,011 $1,246,821 $1,214,580 7/20 $1,219,566 $1,267,820 $1,231,379 8/20 $1,215,315 $1,261,872 $1,225,233 9/20 $1,216,058 $1,262,139 $1,226,313 10/20 $1,211,835 $1,258,348 $1,223,409 11/20 $1,226,435 $1,277,337 $1,239,050 12/20 $1,230,894 $1,285,118 $1,244,228 1/21 $1,235,352 $1,293,308 $1,248,724 2/21 $1,218,641 $1,272,759 $1,231,697 3/21 $1,223,087 $1,280,608 $1,237,625 4/21 $1,231,337 $1,291,350 $1,247,157 5/21 $1,234,537 $1,295,202 $1,248,717 6/21 $1,236,511 $1,298,759 $1,250,896 7/21 $1,245,998 $1,309,530 $1,261,293 8/21 $1,242,806 $1,304,724 $1,256,224 9/21 $1,234,590 $1,295,309 $1,247,843 10/21 $1,232,586 $1,291,521 $1,243,196 11/21 $1,239,504 $1,302,516 $1,252,843 12/21 $1,240,036 $1,304,617 $1,254,791 1/22 $1,213,774 $1,268,906 $1,222,728 2/22 $1,209,267 $1,264,360 $1,219,442 3/22 $1,181,676 $1,223,373 $1,183,439 4/22 $1,157,948 $1,189,535 $1,154,268 5/22 $1,172,693 $1,207,206 $1,168,852 6/22 $1,159,565 $1,187,434 $1,152,699 7/22 $1,182,146 $1,218,808 $1,180,406 8/22 $1,161,050 $1,192,096 $1,158,297 9/22 $1,125,914 $1,146,342 $1,118,292 10/22 $1,120,495 $1,136,809 $1,108,837 11/22 $1,161,828 $1,189,982 $1,157,945 12/22 $1,162,967 $1,193,388 $1,162,380 1/23 $1,190,100 $1,227,669 $1,191,695 2/23 $1,167,943 $1,199,909 $1,167,810 3/23 $1,187,490 $1,226,532 $1,192,375 4/23 $1,184,902 $1,223,730 $1,187,744 5/23 $1,174,497 $1,213,125 $1,175,050 6/23 $1,183,889 $1,225,277 $1,181,286 7/23 $1,185,077 $1,230,125 $1,187,827 8/23 $1,172,134 $1,212,415 $1,173,008 9/23 $1,135,480 $1,176,881 $1,136,555 10/23 $1,118,752 $1,166,866 $1,129,849 11/23 $1,197,998 $1,240,940 $1,198,397 12/23 $1,223,932 $1,269,782 $1,221,433 1/24 $1,221,841 $1,263,297 $1,214,366 2/24 $1,222,545 $1,264,919 $1,217,170 3/24 $1,220,485 $1,264,879 $1,215,056 4/24 $1,209,074 $1,249,214 $1,200,691 5/24 $1,209,764 $1,245,550 $1,193,539 6/24 $1,225,463 $1,264,642 $1,212,958 7/24 $1,234,300 $1,276,168 $1,225,692 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 4.15% 1.15% 2.13% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Minnesota Municipal Bond Index 3.19% 0.93% 2.05% | |
| AssetsNet | $ 247,709,568 | $ 247,709,568 |
| Holdings Count | Holding | 152 | 152 |
| Advisory Fees Paid, Amount | $ 887,103 | |
| InvestmentCompanyPortfolioTurnover | 48% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $247,709,568 # of Portfolio Holdings 152 Portfolio Turnover Rate 48% Total Advisory Fees Paid $887,103 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 14.0% Transportation 4.9% Education 11.8% Electric Utilities 14.6% Hospital 18.3% General Obligations 36.4% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000100969 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Municipal Opportunities Fund | |
| Class Name | Class A | |
| Trading Symbol | EMOAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Municipal Opportunities Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B245"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $98 0.95% | |
| Expenses Paid, Amount | $ 98 | |
| Expense Ratio, Percent | 0.95% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds outperformed higher-rated bonds ↑ Security selections in California bonds, which underperformed the Index during the period, contributed to the Fund’s Index-relative returns ↑ Security selections in local general obligation bonds, which underperformed the Index during the period, contributed to Index-relative returns ↓ Security selections and an underweight position in A-rated bonds, which generally outperformed higher-rated bonds during the period, hurt returns ↓ An underweight exposure to bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ Security selections in the IDR/PCR sector (industrial development revenue/pollution control revenue) detracted from returns during the period | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B250"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class A with Maximum Sales Charge Bloomberg Municipal Bond Index 7/14 $9,675 $10,000 8/14 $9,847 $10,121 9/14 $9,891 $10,131 10/14 $9,961 $10,201 11/14 $9,960 $10,218 12/14 $10,059 $10,270 1/15 $10,263 $10,452 2/15 $10,126 $10,344 3/15 $10,182 $10,374 4/15 $10,134 $10,320 5/15 $10,086 $10,291 6/15 $10,041 $10,282 7/15 $10,127 $10,356 8/15 $10,144 $10,377 9/15 $10,259 $10,452 10/15 $10,304 $10,493 11/15 $10,385 $10,535 12/15 $10,464 $10,609 1/16 $10,612 $10,736 2/16 $10,619 $10,753 3/16 $10,678 $10,787 4/16 $10,774 $10,866 5/16 $10,797 $10,895 6/16 $11,000 $11,069 7/16 $10,998 $11,075 8/16 $11,031 $11,090 9/16 $11,002 $11,035 10/16 $10,882 $10,919 11/16 $10,421 $10,512 12/16 $10,504 $10,635 1/17 $10,549 $10,705 2/17 $10,625 $10,780 3/17 $10,672 $10,803 4/17 $10,783 $10,882 5/17 $10,938 $11,054 6/17 $10,911 $11,015 7/17 $11,002 $11,104 8/17 $11,102 $11,188 9/17 $11,082 $11,131 10/17 $11,070 $11,159 11/17 $11,022 $11,099 12/17 $11,114 $11,215 1/18 $10,995 $11,083 2/18 $10,969 $11,050 3/18 $10,998 $11,090 4/18 $10,964 $11,051 5/18 $11,096 $11,177 6/18 $11,108 $11,187 7/18 $11,158 $11,214 8/18 $11,170 $11,243 9/18 $11,116 $11,170 10/18 $11,044 $11,101 11/18 $11,133 $11,224 12/18 $11,231 $11,359 1/19 $11,338 $11,444 2/19 $11,399 $11,506 3/19 $11,534 $11,688 4/19 $11,565 $11,732 5/19 $11,701 $11,893 6/19 $11,751 $11,937 7/19 $11,829 $12,033 8/19 $11,975 $12,223 9/19 $11,899 $12,125 10/19 $11,910 $12,147 11/19 $11,930 $12,177 12/19 $11,969 $12,215 1/20 $12,172 $12,434 2/20 $12,358 $12,594 3/20 $11,563 $12,137 4/20 $11,225 $11,985 5/20 $11,578 $12,366 6/20 $11,885 $12,468 7/20 $12,103 $12,678 8/20 $12,104 $12,619 9/20 $12,098 $12,621 10/20 $12,081 $12,583 11/20 $12,281 $12,773 12/20 $12,450 $12,851 1/21 $12,631 $12,933 2/21 $12,482 $12,728 3/21 $12,520 $12,806 4/21 $12,625 $12,913 5/21 $12,700 $12,952 6/21 $12,766 $12,988 7/21 $12,870 $13,095 8/21 $12,825 $13,047 9/21 $12,711 $12,953 10/21 $12,667 $12,915 11/21 $12,775 $13,025 12/21 $12,775 $13,046 1/22 $12,455 $12,689 2/22 $12,382 $12,644 3/22 $12,031 $12,234 4/22 $11,693 $11,895 5/22 $11,766 $12,072 6/22 $11,541 $11,874 7/22 $11,780 $12,188 8/22 $11,567 $11,921 9/22 $11,197 $11,463 10/22 $11,097 $11,368 11/22 $11,521 $11,900 12/22 $11,520 $11,934 1/23 $11,845 $12,277 2/23 $11,613 $11,999 3/23 $11,821 $12,265 4/23 $11,798 $12,237 5/23 $11,732 $12,131 6/23 $11,827 $12,253 7/23 $11,856 $12,301 8/23 $11,706 $12,124 9/23 $11,396 $11,769 10/23 $11,235 $11,669 11/23 $11,934 $12,409 12/23 $12,213 $12,698 1/24 $12,236 $12,633 2/24 $12,248 $12,649 3/24 $12,270 $12,649 4/24 $12,162 $12,492 5/24 $12,173 $12,455 6/24 $12,371 $12,646 7/24 $12,488 $12,762 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 5.36% 1.10% 2.59% Class A with 3.25% Maximum Sales Charge 1.97% 0.44% 2.24% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% | |
| AssetsNet | $ 655,366,494 | $ 655,366,494 |
| Holdings Count | Holding | 360 | 360 |
| Advisory Fees Paid, Amount | $ 3,410,907 | |
| InvestmentCompanyPortfolioTurnover | 118% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $655,366,494 # of Portfolio Holdings 360 Portfolio Turnover Rate 118% Total Advisory Fees Paid $3,410,907 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.0% Other Revenue 3.1% Electric Utilities 3.2% Industrial Development Revenue 4.8% Special Tax Revenue 5.5% Education 5.8% Senior Living/Life Care 8.5% Housing 9.4% Water and Sewer 9.8% Transportation 11.9% Hospital 12.3% General Obligations 20.7% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | Material Fund Changes This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. Effective December 31, 2023, the investment adviser and administrator has agreed to reimburse the Fund’s expenses to the extent that total annual operating expenses (relating to ordinary operating expenses only and excluding such expenses such as brokerage commissions, acquired fund fees and expenses of unaffiliated funds, borrowing costs (including borrowing costs of any acquired funds), taxes or litigation expenses) exceed 0.92% of the Fund’s average daily net assets for Class A. This agreement may be changed or terminated after November 30, 2024. | |
| Material Fund Change Expenses [Text Block] | Effective December 31, 2023, the investment adviser and administrator has agreed to reimburse the Fund’s expenses to the extent that total annual operating expenses (relating to ordinary operating expenses only and excluding such expenses such as brokerage commissions, acquired fund fees and expenses of unaffiliated funds, borrowing costs (including borrowing costs of any acquired funds), taxes or litigation expenses) exceed 0.92% of the Fund’s average daily net assets for Class A. This agreement may be changed or terminated after November 30, 2024. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. | |
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000100970 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Municipal Opportunities Fund | |
| Class Name | Class C | |
| Trading Symbol | EMOCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Municipal Opportunities Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B273"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $174 1.70% | |
| Expenses Paid, Amount | $ 174 | |
| Expense Ratio, Percent | 1.70% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds outperformed higher-rated bonds ↑ Security selections in California bonds, which underperformed the Index during the period, contributed to the Fund’s Index-relative returns ↑ Security selections in local general obligation bonds, which underperformed the Index during the period, contributed to Index-relative returns ↓ Security selections and an underweight position in A-rated bonds, which generally outperformed higher-rated bonds during the period, hurt returns ↓ An underweight exposure to bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ Security selections in the IDR/PCR sector (industrial development revenue/pollution control revenue) detracted from returns during the period | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B278"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index 8/14 $10,000 $10,000 8/14 $10,075 $10,040 9/14 $10,113 $10,051 10/14 $10,176 $10,120 11/14 $10,169 $10,137 12/14 $10,262 $10,188 1/15 $10,464 $10,369 2/15 $10,318 $10,262 3/15 $10,368 $10,292 4/15 $10,312 $10,238 5/15 $10,266 $10,209 6/15 $10,205 $10,200 7/15 $10,286 $10,274 8/15 $10,296 $10,294 9/15 $10,407 $10,369 10/15 $10,455 $10,410 11/15 $10,521 $10,451 12/15 $10,595 $10,525 1/16 $10,738 $10,650 2/16 $10,739 $10,667 3/16 $10,792 $10,701 4/16 $10,882 $10,779 5/16 $10,907 $10,809 6/16 $11,096 $10,981 7/16 $11,096 $10,987 8/16 $11,123 $11,002 9/16 $11,077 $10,947 10/16 $10,950 $10,832 11/16 $10,479 $10,428 12/16 $10,555 $10,551 1/17 $10,594 $10,620 2/17 $10,663 $10,694 3/17 $10,704 $10,717 4/17 $10,818 $10,795 5/17 $10,967 $10,966 6/17 $10,923 $10,927 7/17 $11,017 $11,015 8/17 $11,101 $11,099 9/17 $11,074 $11,043 10/17 $11,055 $11,070 11/17 $11,010 $11,010 12/17 $11,085 $11,126 1/18 $10,968 $10,995 2/18 $10,927 $10,962 3/18 $10,949 $11,002 4/18 $10,917 $10,963 5/18 $11,032 $11,088 6/18 $11,047 $11,098 7/18 $11,080 $11,125 8/18 $11,094 $11,153 9/18 $11,034 $11,081 10/18 $10,955 $11,013 11/18 $11,037 $11,135 12/18 $11,127 $11,268 1/19 $11,217 $11,353 2/19 $11,270 $11,414 3/19 $11,397 $11,595 4/19 $11,421 $11,638 5/19 $11,557 $11,799 6/19 $11,599 $11,842 7/19 $11,659 $11,938 8/19 $11,795 $12,126 9/19 $11,714 $12,029 10/19 $11,717 $12,050 11/19 $11,739 $12,080 12/19 $11,761 $12,117 1/20 $11,962 $12,335 2/20 $12,138 $12,494 3/20 $11,340 $12,041 4/20 $11,001 $11,890 5/20 $11,350 $12,268 6/20 $11,634 $12,369 7/20 $11,850 $12,577 8/20 $11,844 $12,518 9/20 $11,830 $12,521 10/20 $11,797 $12,483 11/20 $11,994 $12,672 12/20 $12,142 $12,749 1/21 $12,311 $12,830 2/21 $12,159 $12,626 3/21 $12,198 $12,704 4/21 $12,292 $12,811 5/21 $12,348 $12,849 6/21 $12,404 $12,884 7/21 $12,507 $12,991 8/21 $12,456 $12,943 9/21 $12,337 $12,850 10/21 $12,277 $12,812 11/21 $12,373 $12,921 12/21 $12,366 $12,942 1/22 $12,057 $12,588 2/22 $11,970 $12,543 3/22 $11,624 $12,136 4/22 $11,299 $11,801 5/22 $11,353 $11,976 6/22 $11,129 $11,780 7/22 $11,362 $12,091 8/22 $11,150 $11,826 9/22 $10,776 $11,372 10/22 $10,673 $11,278 11/22 $11,084 $11,805 12/22 $11,076 $11,839 1/23 $11,372 $12,179 2/23 $11,152 $11,904 3/23 $11,345 $12,168 4/23 $11,316 $12,140 5/23 $11,245 $12,035 6/23 $11,329 $12,155 7/23 $11,350 $12,203 8/23 $11,189 $12,028 9/23 $10,895 $11,675 10/23 $10,735 $11,576 11/23 $11,395 $12,311 12/23 $11,655 $12,597 1/24 $11,670 $12,532 2/24 $11,674 $12,548 3/24 $11,688 $12,548 4/24 $11,577 $12,393 5/24 $11,581 $12,356 6/24 $11,762 $12,546 7/24 $12,048 $12,660 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception 8/18/14 Class C 4.57% 0.36% 1.89% Class C with 1% Maximum Deferred Sales Charge 3.57% 0.36% 1.89% Bloomberg Municipal Bond Index 3.74% 1.18% 2.40% | |
| Performance Inception Date | Aug. 18, 2014 | |
| AssetsNet | $ 655,366,494 | $ 655,366,494 |
| Holdings Count | Holding | 360 | 360 |
| Advisory Fees Paid, Amount | $ 3,410,907 | |
| InvestmentCompanyPortfolioTurnover | 118% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $655,366,494 # of Portfolio Holdings 360 Portfolio Turnover Rate 118% Total Advisory Fees Paid $3,410,907 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.0% Other Revenue 3.1% Electric Utilities 3.2% Industrial Development Revenue 4.8% Special Tax Revenue 5.5% Education 5.8% Senior Living/Life Care 8.5% Housing 9.4% Water and Sewer 9.8% Transportation 11.9% Hospital 12.3% General Obligations 20.7% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | Material Fund Changes This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. Effective December 31, 2023, the investment adviser and administrator has agreed to reimburse the Fund’s expenses to the extent that total annual operating expenses (relating to ordinary operating expenses only and excluding such expenses such as brokerage commissions, acquired fund fees and expenses of unaffiliated funds, borrowing costs (including borrowing costs of any acquired funds), taxes or litigation expenses) exceed 1.67% of the Fund’s average daily net assets for Class C. This agreement may be changed or terminated after November 30, 2024. | |
| Material Fund Change Expenses [Text Block] | Effective December 31, 2023, the investment adviser and administrator has agreed to reimburse the Fund’s expenses to the extent that total annual operating expenses (relating to ordinary operating expenses only and excluding such expenses such as brokerage commissions, acquired fund fees and expenses of unaffiliated funds, borrowing costs (including borrowing costs of any acquired funds), taxes or litigation expenses) exceed 1.67% of the Fund’s average daily net assets for Class C. This agreement may be changed or terminated after November 30, 2024. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. | |
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000100971 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Municipal Opportunities Fund | |
| Class Name | Class I | |
| Trading Symbol | EMOIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Municipal Opportunities Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B302"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $72 0.70% | |
| Expenses Paid, Amount | $ 72 | |
| Expense Ratio, Percent | 0.70% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds outperformed higher-rated bonds ↑ Security selections in California bonds, which underperformed the Index during the period, contributed to the Fund’s Index-relative returns ↑ Security selections in local general obligation bonds, which underperformed the Index during the period, contributed to Index-relative returns ↓ Security selections and an underweight position in A-rated bonds, which generally outperformed higher-rated bonds during the period, hurt returns ↓ An underweight exposure to bonds with 22+ years remaining to maturity hurt returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ Security selections in the IDR/PCR sector (industrial development revenue/pollution control revenue) detracted from returns during the period | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B307"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class I Bloomberg Municipal Bond Index 7/14 $1,000,000 $1,000,000 8/14 $1,017,967 $1,012,107 9/14 $1,022,768 $1,013,136 10/14 $1,030,211 $1,020,082 11/14 $1,031,246 $1,021,847 12/14 $1,040,719 $1,027,003 1/15 $1,063,006 $1,045,205 2/15 $1,048,151 $1,034,424 3/15 $1,055,024 $1,037,411 4/15 $1,049,351 $1,031,968 5/15 $1,045,579 $1,029,117 6/15 $1,040,198 $1,028,179 7/15 $1,049,403 $1,035,627 8/15 $1,051,303 $1,037,660 9/15 $1,063,501 $1,045,177 10/15 $1,069,300 $1,049,332 11/15 $1,077,857 $1,053,504 12/15 $1,085,366 $1,060,906 1/16 $1,100,990 $1,073,565 2/16 $1,101,927 $1,075,253 3/16 $1,109,221 $1,078,659 4/16 $1,118,415 $1,086,590 5/16 $1,121,962 $1,089,529 6/16 $1,143,280 $1,106,862 7/16 $1,143,272 $1,107,538 8/16 $1,147,010 $1,109,032 9/16 $1,144,197 $1,103,497 10/16 $1,131,074 $1,091,920 11/16 $1,084,341 $1,051,197 12/16 $1,092,202 $1,063,538 1/17 $1,098,141 $1,070,549 2/17 $1,106,165 $1,077,983 3/17 $1,111,302 $1,080,323 4/17 $1,123,042 $1,088,162 5/17 $1,139,468 $1,105,432 6/17 $1,136,857 $1,101,468 7/17 $1,146,602 $1,110,379 8/17 $1,157,244 $1,118,829 9/17 $1,155,371 $1,113,141 10/17 $1,154,424 $1,115,858 11/17 $1,149,682 $1,109,883 12/17 $1,159,514 $1,121,483 1/18 $1,147,274 $1,108,280 2/18 $1,143,880 $1,104,969 3/18 $1,147,176 $1,109,047 4/18 $1,144,774 $1,105,089 5/18 $1,157,846 $1,117,744 6/18 $1,160,320 $1,118,698 7/18 $1,165,752 $1,121,412 8/18 $1,167,245 $1,124,292 9/18 $1,161,910 $1,117,014 10/18 $1,154,616 $1,110,135 11/18 $1,164,115 $1,122,422 12/18 $1,174,635 $1,135,861 1/19 $1,186,089 $1,144,448 2/19 $1,192,661 $1,150,575 3/19 $1,206,059 $1,168,763 4/19 $1,209,588 $1,173,156 5/19 $1,225,010 $1,189,329 6/19 $1,230,487 $1,193,721 7/19 $1,237,887 $1,203,341 8/19 $1,254,378 $1,222,322 9/19 $1,246,795 $1,212,524 10/19 $1,247,144 $1,214,697 11/19 $1,250,507 $1,217,735 12/19 $1,253,874 $1,221,453 1/20 $1,276,429 $1,243,398 2/20 $1,296,178 $1,259,432 3/20 $1,212,162 $1,213,749 4/20 $1,176,989 $1,198,516 5/20 $1,215,293 $1,236,643 6/20 $1,246,639 $1,246,821 7/20 $1,270,786 $1,267,820 8/20 $1,271,209 $1,261,872 9/20 $1,270,789 $1,262,139 10/20 $1,269,308 $1,258,348 11/20 $1,290,580 $1,277,337 12/20 $1,307,574 $1,285,118 1/21 $1,327,908 $1,293,308 2/21 $1,311,475 $1,272,759 3/21 $1,316,778 $1,280,608 4/21 $1,328,103 $1,291,350 5/21 $1,335,211 $1,295,202 6/21 $1,342,348 $1,298,759 7/21 $1,354,659 $1,309,530 8/21 $1,350,249 $1,304,724 9/21 $1,338,555 $1,295,309 10/21 $1,334,185 $1,291,521 11/21 $1,344,720 $1,302,516 12/21 $1,346,142 $1,304,617 1/22 $1,312,685 $1,268,906 2/22 $1,304,168 $1,264,360 3/22 $1,267,593 $1,223,373 4/22 $1,233,332 $1,189,535 5/22 $1,240,174 $1,207,206 6/22 $1,216,774 $1,187,434 7/22 $1,243,303 $1,218,808 8/22 $1,221,136 $1,192,096 9/22 $1,181,301 $1,146,342 10/22 $1,171,025 $1,136,809 11/22 $1,217,050 $1,189,982 12/22 $1,217,178 $1,193,388 1/23 $1,250,680 $1,227,669 2/23 $1,227,497 $1,199,909 3/23 $1,248,617 $1,226,532 4/23 $1,247,557 $1,223,730 5/23 $1,240,887 $1,213,125 6/23 $1,251,122 $1,225,277 7/23 $1,254,523 $1,230,125 8/23 $1,237,775 $1,212,415 9/23 $1,206,391 $1,176,881 10/23 $1,189,662 $1,166,866 11/23 $1,262,603 $1,240,940 12/23 $1,293,581 $1,269,782 1/24 $1,296,274 $1,263,297 2/24 $1,296,636 $1,264,919 3/24 $1,300,410 $1,264,879 4/24 $1,289,245 $1,249,214 5/24 $1,290,722 $1,245,550 6/24 $1,311,930 $1,264,642 7/24 $1,323,776 $1,276,168 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 5.53% 1.35% 2.84% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% | |
| AssetsNet | $ 655,366,494 | $ 655,366,494 |
| Holdings Count | Holding | 360 | 360 |
| Advisory Fees Paid, Amount | $ 3,410,907 | |
| InvestmentCompanyPortfolioTurnover | 118% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $655,366,494 # of Portfolio Holdings 360 Portfolio Turnover Rate 118% Total Advisory Fees Paid $3,410,907 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.0% Other Revenue 3.1% Electric Utilities 3.2% Industrial Development Revenue 4.8% Special Tax Revenue 5.5% Education 5.8% Senior Living/Life Care 8.5% Housing 9.4% Water and Sewer 9.8% Transportation 11.9% Hospital 12.3% General Obligations 20.7% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | Material Fund Changes This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. Effective December 31, 2023, the investment adviser and administrator has agreed to reimburse the Fund’s expenses to the extent that total annual operating expenses (relating to ordinary operating expenses only and excluding such expenses such as brokerage commissions, acquired fund fees and expenses of unaffiliated funds, borrowing costs (including borrowing costs of any acquired funds), taxes or litigation expenses) exceed 0.67% of the Fund’s average daily net assets for Class I. This agreement may be changed or terminated after November 30, 2024. | |
| Material Fund Change Expenses [Text Block] | Effective December 31, 2023, the investment adviser and administrator has agreed to reimburse the Fund’s expenses to the extent that total annual operating expenses (relating to ordinary operating expenses only and excluding such expenses such as brokerage commissions, acquired fund fees and expenses of unaffiliated funds, borrowing costs (including borrowing costs of any acquired funds), taxes or litigation expenses) exceed 0.67% of the Fund’s average daily net assets for Class I. This agreement may be changed or terminated after November 30, 2024. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. | |
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013127 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance New Jersey Municipal Income Fund | |
| Class Name | Class A | |
| Trading Symbol | ETNJX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance New Jersey Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B329"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $73 0.72% | |
| Expenses Paid, Amount | $ 73 | |
| Expense Ratio, Percent | 0.72% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in BBB-rated bonds helped returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections in bonds with 22+ years remaining to maturity contributed to the Fund’s Index-relative performance during the period ↑ An out-of-Index exposure to taxable municipal bonds helped Index-relative returns as taxable municipal bonds outperformed tax-exempt municipal bonds ↓ Security selections in bonds with 12-17 years remaining to maturity detracted from the Fund’s Index-relative performance during the period ↓ Security selections in the IDR/PCR sector (industrial development revenue/pollution control revenue) detracted from returns during the period ↓ An overweight position in bonds with coupon rates of less than 4%, excluding zero-coupon bonds, detracted from Index-relative returns during the period | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B334"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class A with Maximum Sales Charge Bloomberg Municipal Bond Index Bloomberg New Jersey Municipal Bond Index 7/14 $9,675 $10,000 $10,000 8/14 $9,787 $10,121 $10,142 9/14 $9,858 $10,131 $10,150 10/14 $9,876 $10,201 $10,202 11/14 $9,842 $10,218 $10,206 12/14 $9,892 $10,270 $10,280 1/15 $9,984 $10,452 $10,464 2/15 $9,940 $10,344 $10,305 3/15 $9,949 $10,374 $10,304 4/15 $9,915 $10,320 $10,196 5/15 $9,923 $10,291 $10,083 6/15 $9,879 $10,282 $10,089 7/15 $9,952 $10,356 $10,177 8/15 $9,960 $10,377 $10,074 9/15 $10,045 $10,452 $10,191 10/15 $10,087 $10,493 $10,262 11/15 $10,140 $10,535 $10,343 12/15 $10,236 $10,609 $10,484 1/16 $10,343 $10,736 $10,641 2/16 $10,331 $10,753 $10,631 3/16 $10,394 $10,787 $10,695 4/16 $10,458 $10,866 $10,808 5/16 $10,487 $10,895 $10,846 6/16 $10,629 $11,069 $11,084 7/16 $10,627 $11,075 $11,112 8/16 $10,680 $11,090 $11,181 9/16 $10,654 $11,035 $11,136 10/16 $10,583 $10,919 $10,991 11/16 $10,208 $10,512 $10,487 12/16 $10,294 $10,635 $10,558 1/17 $10,290 $10,705 $10,630 2/17 $10,344 $10,780 $10,731 3/17 $10,386 $10,803 $10,749 4/17 $10,474 $10,882 $10,805 5/17 $10,631 $11,054 $11,014 6/17 $10,616 $11,015 $10,977 7/17 $10,670 $11,104 $11,089 8/17 $10,760 $11,188 $11,260 9/17 $10,747 $11,131 $11,298 10/17 $10,744 $11,159 $11,336 11/17 $10,718 $11,099 $11,302 12/17 $10,785 $11,215 $11,421 1/18 $10,686 $11,083 $11,288 2/18 $10,658 $11,050 $11,257 3/18 $10,701 $11,090 $11,304 4/18 $10,673 $11,051 $11,278 5/18 $10,787 $11,177 $11,409 6/18 $10,817 $11,187 $11,440 7/18 $10,872 $11,214 $11,517 8/18 $10,902 $11,243 $11,554 9/18 $10,836 $11,170 $11,479 10/18 $10,781 $11,101 $11,390 11/18 $10,884 $11,224 $11,509 12/18 $10,999 $11,359 $11,665 1/19 $11,088 $11,444 $11,765 2/19 $11,153 $11,506 $11,838 3/19 $11,327 $11,688 $12,064 4/19 $11,380 $11,732 $12,111 5/19 $11,543 $11,893 $12,328 6/19 $11,608 $11,937 $12,390 7/19 $11,708 $12,033 $12,519 8/19 $11,944 $12,223 $12,747 9/19 $11,847 $12,125 $12,620 10/19 $11,848 $12,147 $12,635 11/19 $11,863 $12,177 $12,681 12/19 $11,892 $12,215 $12,735 1/20 $12,145 $12,434 $12,995 2/20 $12,337 $12,594 $13,182 3/20 $11,788 $12,137 $12,286 4/20 $11,515 $11,985 $12,009 5/20 $11,934 $12,366 $12,312 6/20 $12,038 $12,468 $12,646 7/20 $12,257 $12,678 $13,047 8/20 $12,233 $12,619 $13,059 9/20 $12,247 $12,621 $13,035 10/20 $12,222 $12,583 $12,987 11/20 $12,415 $12,773 $13,270 12/20 $12,531 $12,851 $13,449 1/21 $12,659 $12,933 $13,640 2/21 $12,428 $12,728 $13,431 3/21 $12,491 $12,806 $13,517 4/21 $12,594 $12,913 $13,663 5/21 $12,644 $12,952 $13,715 6/21 $12,682 $12,988 $13,785 7/21 $12,783 $13,095 $13,929 8/21 $12,729 $13,047 $13,890 9/21 $12,622 $12,953 $13,789 10/21 $12,595 $12,915 $13,708 11/21 $12,694 $13,025 $13,833 12/21 $12,698 $13,046 $13,867 1/22 $12,364 $12,689 $13,451 2/22 $12,280 $12,644 $13,370 3/22 $11,918 $12,234 $12,920 4/22 $11,543 $11,895 $12,535 5/22 $11,633 $12,072 $12,723 6/22 $11,457 $11,874 $12,536 7/22 $11,747 $12,188 $12,908 8/22 $11,452 $11,921 $12,630 9/22 $11,050 $11,463 $12,112 10/22 $10,956 $11,368 $12,009 11/22 $11,439 $11,900 $12,606 12/22 $11,453 $11,934 $12,628 1/23 $11,750 $12,277 $13,048 2/23 $11,495 $11,999 $12,764 3/23 $11,725 $12,265 $13,074 4/23 $11,727 $12,237 $13,041 5/23 $11,634 $12,131 $12,952 6/23 $11,731 $12,253 $13,082 7/23 $11,759 $12,301 $13,159 8/23 $11,650 $12,124 $12,985 9/23 $11,377 $11,769 $12,633 10/23 $11,254 $11,669 $12,520 11/23 $11,849 $12,409 $13,286 12/23 $12,099 $12,698 $13,603 1/24 $12,072 $12,633 $13,544 2/24 $12,075 $12,649 $13,569 3/24 $12,063 $12,649 $13,563 4/24 $11,941 $12,492 $13,402 5/24 $11,931 $12,455 $13,357 6/24 $12,104 $12,646 $13,561 7/24 $12,211 $12,762 $13,691 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 3.81% 0.84% 2.35% Class A with 3.25% Maximum Sales Charge 0.41% 0.17% 2.02% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg New Jersey Municipal Bond Index 4.04% 1.80% 3.19% | |
| AssetsNet | $ 151,085,148 | $ 151,085,148 |
| Holdings Count | Holding | 96 | 96 |
| Advisory Fees Paid, Amount | $ 539,080 | |
| InvestmentCompanyPortfolioTurnover | 52% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $151,085,148 # of Portfolio Holdings 96 Portfolio Turnover Rate 52% Total Advisory Fees Paid $539,080 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 11.2% Industrial Development Revenue 3.5% Water and Sewer 4.0% Education 10.4% Lease Rev./Cert. of Participation 11.5% Hospital 11.7% Special Tax Revenue 12.4% Transportation 16.8% General Obligations 18.5% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013129 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance New Jersey Municipal Income Fund | |
| Class Name | Class C | |
| Trading Symbol | ECNJX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance New Jersey Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B354"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $149 1.47% | |
| Expenses Paid, Amount | $ 149 | |
| Expense Ratio, Percent | 1.47% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↓ Security selections in bonds with 12-17 years remaining to maturity detracted from the Fund’s Index-relative performance during the period ↓ Security selections in the IDR/PCR sector (industrial development revenue/pollution control revenue) detracted from returns during the period ↓ An overweight position in bonds with coupon rates of less than 4%, excluding zero-coupon bonds, detracted from Index-relative returns during the period ↑ Security selections and an overweight position in BBB-rated bonds helped returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections in bonds with 22+ years remaining to maturity contributed to the Fund’s Index-relative performance during the period ↑ An out-of-Index exposure to taxable municipal bonds helped Index-relative returns as taxable municipal bonds outperformed tax-exempt municipal bonds | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B359"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Bloomberg New Jersey Municipal Bond Index 7/14 $10,000 $10,000 $10,000 8/14 $10,116 $10,121 $10,142 9/14 $10,182 $10,131 $10,150 10/14 $10,194 $10,201 $10,202 11/14 $10,155 $10,218 $10,206 12/14 $10,199 $10,270 $10,280 1/15 $10,286 $10,452 $10,464 2/15 $10,237 $10,344 $10,305 3/15 $10,240 $10,374 $10,304 4/15 $10,202 $10,320 $10,196 5/15 $10,195 $10,291 $10,083 6/15 $10,146 $10,282 $10,089 7/15 $10,213 $10,356 $10,177 8/15 $10,216 $10,377 $10,074 9/15 $10,305 $10,452 $10,191 10/15 $10,341 $10,493 $10,262 11/15 $10,377 $10,535 $10,343 12/15 $10,476 $10,609 $10,484 1/16 $10,577 $10,736 $10,641 2/16 $10,559 $10,753 $10,631 3/16 $10,616 $10,787 $10,695 4/16 $10,684 $10,866 $10,808 5/16 $10,696 $10,895 $10,846 6/16 $10,841 $11,069 $11,084 7/16 $10,822 $11,075 $11,112 8/16 $10,879 $11,090 $11,181 9/16 $10,838 $11,035 $11,136 10/16 $10,763 $10,919 $10,991 11/16 $10,370 $10,512 $10,487 12/16 $10,449 $10,635 $10,558 1/17 $10,440 $10,705 $10,630 2/17 $10,487 $10,780 $10,731 3/17 $10,522 $10,803 $10,749 4/17 $10,614 $10,882 $10,805 5/17 $10,761 $11,054 $11,014 6/17 $10,741 $11,015 $10,977 7/17 $10,788 $11,104 $11,089 8/17 $10,870 $11,188 $11,260 9/17 $10,851 $11,131 $11,298 10/17 $10,843 $11,159 $11,336 11/17 $10,801 $11,099 $11,302 12/17 $10,872 $11,215 $11,421 1/18 $10,771 $11,083 $11,288 2/18 $10,728 $11,050 $11,257 3/18 $10,775 $11,090 $11,304 4/18 $10,731 $11,051 $11,278 5/18 $10,846 $11,177 $11,409 6/18 $10,859 $11,187 $11,440 7/18 $10,906 $11,214 $11,517 8/18 $10,941 $11,243 $11,554 9/18 $10,872 $11,170 $11,479 10/18 $10,802 $11,101 $11,390 11/18 $10,896 $11,224 $11,509 12/18 $11,000 $11,359 $11,665 1/19 $11,091 $11,444 $11,765 2/19 $11,148 $11,506 $11,838 3/19 $11,309 $11,688 $12,064 4/19 $11,354 $11,732 $12,111 5/19 $11,516 $11,893 $12,328 6/19 $11,572 $11,937 $12,390 7/19 $11,661 $12,033 $12,519 8/19 $11,892 $12,223 $12,747 9/19 $11,793 $12,125 $12,620 10/19 $11,788 $12,147 $12,635 11/19 $11,784 $12,177 $12,681 12/19 $11,817 $12,215 $12,735 1/20 $12,064 $12,434 $12,995 2/20 $12,240 $12,594 $13,182 3/20 $11,689 $12,137 $12,286 4/20 $11,411 $11,985 $12,009 5/20 $11,815 $12,366 $12,312 6/20 $11,908 $12,468 $12,646 7/20 $12,120 $12,678 $13,047 8/20 $12,092 $12,619 $13,059 9/20 $12,100 $12,621 $13,035 10/20 $12,058 $12,583 $12,987 11/20 $12,235 $12,773 $13,270 12/20 $12,363 $12,851 $13,449 1/21 $12,466 $12,933 $13,640 2/21 $12,242 $12,728 $13,431 3/21 $12,296 $12,806 $13,517 4/21 $12,387 $12,913 $13,663 5/21 $12,429 $12,952 $13,715 6/21 $12,447 $12,988 $13,785 7/21 $12,536 $13,095 $13,929 8/21 $12,491 $13,047 $13,890 9/21 $12,374 $12,953 $13,789 10/21 $12,342 $12,915 $13,708 11/21 $12,429 $13,025 $13,833 12/21 $12,426 $13,046 $13,867 1/22 $12,092 $12,689 $13,451 2/22 $12,007 $12,644 $13,370 3/22 $11,636 $12,234 $12,920 4/22 $11,267 $11,895 $12,535 5/22 $11,344 $12,072 $12,723 6/22 $11,162 $11,874 $12,536 7/22 $11,440 $12,188 $12,908 8/22 $11,145 $11,921 $12,630 9/22 $10,751 $11,463 $12,112 10/22 $10,658 $11,368 $12,009 11/22 $11,115 $11,900 $12,606 12/22 $11,110 $11,934 $12,628 1/23 $11,392 $12,277 $13,048 2/23 $11,149 $11,999 $12,764 3/23 $11,371 $12,265 $13,074 4/23 $11,366 $12,237 $13,041 5/23 $11,261 $12,131 $12,952 6/23 $11,358 $12,253 $13,082 7/23 $11,366 $12,301 $13,159 8/23 $11,258 $12,124 $12,985 9/23 $10,986 $11,769 $12,633 10/23 $10,854 $11,669 $12,520 11/23 $11,424 $12,409 $13,286 12/23 $11,663 $12,698 $13,603 1/24 $11,632 $12,633 $13,544 2/24 $11,615 $12,649 $13,569 3/24 $11,611 $12,649 $13,563 4/24 $11,480 $12,492 $13,402 5/24 $11,465 $12,455 $13,357 6/24 $11,618 $12,646 $13,561 7/24 $11,886 $12,762 $13,691 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 3.12% 0.10% 1.74% Class C with 1% Maximum Deferred Sales Charge 2.12% 0.10% 1.74% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg New Jersey Municipal Bond Index 4.04% 1.80% 3.19% | |
| AssetsNet | $ 151,085,148 | $ 151,085,148 |
| Holdings Count | Holding | 96 | 96 |
| Advisory Fees Paid, Amount | $ 539,080 | |
| InvestmentCompanyPortfolioTurnover | 52% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $151,085,148 # of Portfolio Holdings 96 Portfolio Turnover Rate 52% Total Advisory Fees Paid $539,080 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 11.2% Industrial Development Revenue 3.5% Water and Sewer 4.0% Education 10.4% Lease Rev./Cert. of Participation 11.5% Hospital 11.7% Special Tax Revenue 12.4% Transportation 16.8% General Obligations 18.5% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000063948 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance New Jersey Municipal Income Fund | |
| Class Name | Class I | |
| Trading Symbol | EINJX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance New Jersey Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B379"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $53 0.52% | |
| Expenses Paid, Amount | $ 53 | |
| Expense Ratio, Percent | 0.52% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight position in BBB-rated bonds helped returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections in bonds with 22+ years remaining to maturity contributed to the Fund’s Index-relative performance during the period ↑ An out-of-Index exposure to taxable municipal bonds helped Index-relative returns as taxable municipal bonds outperformed tax-exempt municipal bonds ↓ Security selections in bonds with 12-17 years remaining to maturity detracted from the Fund’s Index-relative performance during the period ↓ Security selections in the IDR/PCR sector (industrial development revenue/pollution control revenue) detracted from returns during the period ↓ An overweight position in bonds with coupon rates of less than 4%, excluding zero-coupon bonds, detracted from Index-relative returns during the period | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B384"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class I Bloomberg Municipal Bond Index Bloomberg New Jersey Municipal Bond Index 7/14 $1,000,000 $1,000,000 $1,000,000 8/14 $1,011,735 $1,012,107 $1,014,152 9/14 $1,019,248 $1,013,136 $1,014,981 10/14 $1,021,321 $1,020,082 $1,020,196 11/14 $1,019,009 $1,021,847 $1,020,581 12/14 $1,023,264 $1,027,003 $1,028,006 1/15 $1,034,103 $1,045,205 $1,046,383 2/15 $1,029,662 $1,034,424 $1,030,504 3/15 $1,029,644 $1,037,411 $1,030,419 4/15 $1,027,405 $1,031,968 $1,019,611 5/15 $1,027,387 $1,029,117 $1,008,253 6/15 $1,022,929 $1,028,179 $1,008,856 7/15 $1,030,688 $1,035,627 $1,017,725 8/15 $1,032,872 $1,037,660 $1,007,364 9/15 $1,041,828 $1,045,177 $1,019,069 10/15 $1,046,294 $1,049,332 $1,026,230 11/15 $1,050,810 $1,053,504 $1,034,287 12/15 $1,060,964 $1,060,906 $1,048,421 1/16 $1,072,324 $1,073,565 $1,064,086 2/16 $1,072,314 $1,075,253 $1,063,050 3/16 $1,077,960 $1,078,659 $1,069,536 4/16 $1,085,860 $1,086,590 $1,080,774 5/16 $1,087,973 $1,089,529 $1,084,572 6/16 $1,104,027 $1,106,862 $1,108,395 7/16 $1,102,829 $1,107,538 $1,111,219 8/16 $1,109,643 $1,109,032 $1,118,141 9/16 $1,106,019 $1,103,497 $1,113,567 10/16 $1,098,846 $1,091,920 $1,099,132 11/16 $1,060,041 $1,051,197 $1,048,652 12/16 $1,069,214 $1,063,538 $1,055,841 1/17 $1,068,969 $1,070,549 $1,063,001 2/17 $1,074,665 $1,077,983 $1,073,099 3/17 $1,079,227 $1,080,323 $1,074,879 4/17 $1,089,748 $1,088,162 $1,080,525 5/17 $1,105,078 $1,105,432 $1,101,406 6/17 $1,103,718 $1,101,468 $1,097,729 7/17 $1,109,542 $1,110,379 $1,108,912 8/17 $1,119,091 $1,118,829 $1,125,968 9/17 $1,117,859 $1,113,141 $1,129,766 10/17 $1,117,791 $1,115,858 $1,133,595 11/17 $1,115,248 $1,109,883 $1,130,181 12/17 $1,123,614 $1,121,483 $1,142,057 1/18 $1,113,543 $1,108,280 $1,128,760 2/18 $1,109,572 $1,104,969 $1,125,720 3/18 $1,115,444 $1,109,047 $1,130,357 4/18 $1,112,692 $1,105,089 $1,127,820 5/18 $1,124,736 $1,117,744 $1,140,940 6/18 $1,126,873 $1,118,698 $1,144,001 7/18 $1,132,755 $1,121,412 $1,151,715 8/18 $1,136,096 $1,124,292 $1,155,380 9/18 $1,130,642 $1,117,014 $1,147,926 10/18 $1,123,887 $1,110,135 $1,139,003 11/18 $1,134,802 $1,122,422 $1,150,905 12/18 $1,146,982 $1,135,861 $1,166,480 1/19 $1,157,640 $1,144,448 $1,176,474 2/19 $1,163,384 $1,150,575 $1,183,826 3/19 $1,183,045 $1,168,763 $1,206,352 4/19 $1,187,485 $1,173,156 $1,211,063 5/19 $1,204,709 $1,189,329 $1,232,846 6/19 $1,211,631 $1,193,721 $1,239,047 7/19 $1,222,322 $1,203,341 $1,251,890 8/19 $1,247,199 $1,222,322 $1,274,662 9/19 $1,238,536 $1,212,524 $1,261,984 10/19 $1,238,881 $1,214,697 $1,263,514 11/19 $1,239,341 $1,217,735 $1,268,059 12/19 $1,243,820 $1,221,453 $1,273,541 1/20 $1,270,528 $1,243,398 $1,299,498 2/20 $1,289,407 $1,259,432 $1,318,162 3/20 $1,233,556 $1,213,749 $1,228,610 4/20 $1,203,857 $1,198,516 $1,200,939 5/20 $1,247,824 $1,236,643 $1,231,190 6/20 $1,258,834 $1,246,821 $1,264,591 7/20 $1,283,110 $1,267,820 $1,304,652 8/20 $1,280,801 $1,261,872 $1,305,883 9/20 $1,282,398 $1,262,139 $1,303,481 10/20 $1,278,554 $1,258,348 $1,298,748 11/20 $1,298,920 $1,277,337 $1,326,978 12/20 $1,312,509 $1,285,118 $1,344,877 1/21 $1,326,008 $1,293,308 $1,364,032 2/21 $1,301,876 $1,272,759 $1,343,082 3/21 $1,308,659 $1,280,608 $1,351,662 4/21 $1,320,894 $1,291,350 $1,366,264 5/21 $1,324,864 $1,295,202 $1,371,510 6/21 $1,328,965 $1,298,759 $1,378,456 7/21 $1,339,659 $1,309,530 $1,392,868 8/21 $1,335,441 $1,304,724 $1,388,991 9/21 $1,324,410 $1,295,309 $1,378,931 10/21 $1,321,600 $1,291,521 $1,370,804 11/21 $1,332,216 $1,302,516 $1,383,262 12/21 $1,332,899 $1,304,617 $1,386,750 1/22 $1,298,080 $1,268,906 $1,345,124 2/22 $1,289,485 $1,264,360 $1,336,975 3/22 $1,250,388 $1,223,373 $1,292,016 4/22 $1,212,718 $1,189,535 $1,253,483 5/22 $1,222,301 $1,207,206 $1,272,271 6/22 $1,202,757 $1,187,434 $1,253,576 7/22 $1,233,373 $1,218,808 $1,290,844 8/22 $1,202,624 $1,192,096 $1,262,985 9/22 $1,162,071 $1,146,342 $1,211,177 10/22 $1,152,399 $1,136,809 $1,200,889 11/22 $1,203,266 $1,189,982 $1,260,566 12/22 $1,203,545 $1,193,388 $1,262,823 1/23 $1,234,888 $1,227,669 $1,304,763 2/23 $1,209,708 $1,199,909 $1,276,390 3/23 $1,234,161 $1,226,532 $1,307,440 4/23 $1,234,520 $1,223,730 $1,304,116 5/23 $1,223,513 $1,213,125 $1,295,238 6/23 $1,235,419 $1,225,277 $1,308,224 7/23 $1,238,591 $1,230,125 $1,315,943 8/23 $1,227,335 $1,212,415 $1,298,516 9/23 $1,198,769 $1,176,881 $1,263,302 10/23 $1,186,050 $1,166,866 $1,251,975 11/23 $1,247,360 $1,240,940 $1,328,629 12/23 $1,275,368 $1,269,782 $1,360,274 1/24 $1,272,782 $1,263,297 $1,354,446 2/24 $1,273,231 $1,264,919 $1,356,903 3/24 $1,272,230 $1,264,879 $1,356,270 4/24 $1,258,106 $1,249,214 $1,340,162 5/24 $1,258,772 $1,245,550 $1,335,723 6/24 $1,275,751 $1,264,642 $1,356,078 7/24 $1,288,262 $1,276,168 $1,369,127 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 4.01% 1.06% 2.56% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg New Jersey Municipal Bond Index 4.04% 1.80% 3.19% | |
| AssetsNet | $ 151,085,148 | $ 151,085,148 |
| Holdings Count | Holding | 96 | 96 |
| Advisory Fees Paid, Amount | $ 539,080 | |
| InvestmentCompanyPortfolioTurnover | 52% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $151,085,148 # of Portfolio Holdings 96 Portfolio Turnover Rate 52% Total Advisory Fees Paid $539,080 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 11.2% Industrial Development Revenue 3.5% Water and Sewer 4.0% Education 10.4% Lease Rev./Cert. of Participation 11.5% Hospital 11.7% Special Tax Revenue 12.4% Transportation 16.8% General Obligations 18.5% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | ||
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013145 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Pennsylvania Municipal Income Fund | |
| Class Name | Class A | |
| Trading Symbol | ETPAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Pennsylvania Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B405"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $77 0.75% | |
| Expenses Paid, Amount | $ 77 | |
| Expense Ratio, Percent | 0.75% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight exposure to bonds with 17+ years to maturity helped as longer-maturity bonds outperformed shorter-maturity bonds ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections and an overweight position in the transportation sector, which outperformed the Index during the period, contributed to returns ↓ Security selections in A-rated bonds detracted from the Fund’s Index-relative returns during the period ↓ Security selections and an overweight exposure to the water & sewer sector, which underperformed the Index during the period, detracted from returns ↓ An overweight position in the education sector, which underperformed the Index during the period, detracted from Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B410"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class A with Maximum Sales Charge Bloomberg Municipal Bond Index Bloomberg Pennsylvania Municipal Bond Index 7/14 $9,675 $10,000 $10,000 8/14 $9,772 $10,121 $10,124 9/14 $9,859 $10,131 $10,136 10/14 $9,902 $10,201 $10,207 11/14 $9,880 $10,218 $10,221 12/14 $9,923 $10,270 $10,275 1/15 $10,032 $10,452 $10,460 2/15 $9,965 $10,344 $10,343 3/15 $9,986 $10,374 $10,377 4/15 $9,962 $10,320 $10,325 5/15 $9,961 $10,291 $10,299 6/15 $9,949 $10,282 $10,287 7/15 $10,005 $10,356 $10,375 8/15 $10,038 $10,377 $10,404 9/15 $10,117 $10,452 $10,475 10/15 $10,150 $10,493 $10,508 11/15 $10,194 $10,535 $10,563 12/15 $10,272 $10,609 $10,640 1/16 $10,374 $10,736 $10,766 2/16 $10,361 $10,753 $10,780 3/16 $10,393 $10,787 $10,822 4/16 $10,460 $10,866 $10,899 5/16 $10,481 $10,895 $10,937 6/16 $10,641 $11,069 $11,114 7/16 $10,637 $11,075 $11,118 8/16 $10,656 $11,090 $11,131 9/16 $10,605 $11,035 $11,066 10/16 $10,518 $10,919 $10,951 11/16 $10,185 $10,512 $10,530 12/16 $10,275 $10,635 $10,665 1/17 $10,309 $10,705 $10,730 2/17 $10,364 $10,780 $10,802 3/17 $10,374 $10,803 $10,843 4/17 $10,442 $10,882 $10,925 5/17 $10,558 $11,054 $11,103 6/17 $10,531 $11,015 $11,090 7/17 $10,576 $11,104 $11,164 8/17 $10,645 $11,188 $11,255 9/17 $10,605 $11,131 $11,181 10/17 $10,602 $11,159 $11,218 11/17 $10,537 $11,099 $11,183 12/17 $10,607 $11,215 $11,307 1/18 $10,542 $11,083 $11,163 2/18 $10,527 $11,050 $11,119 3/18 $10,560 $11,090 $11,169 4/18 $10,544 $11,051 $11,132 5/18 $10,641 $11,177 $11,262 6/18 $10,675 $11,187 $11,276 7/18 $10,699 $11,214 $11,301 8/18 $10,723 $11,243 $11,341 9/18 $10,668 $11,170 $11,270 10/18 $10,613 $11,101 $11,191 11/18 $10,697 $11,224 $11,315 12/18 $10,795 $11,359 $11,472 1/19 $10,867 $11,444 $11,564 2/19 $10,926 $11,506 $11,633 3/19 $11,024 $11,688 $11,838 4/19 $11,058 $11,732 $11,891 5/19 $11,181 $11,893 $12,062 6/19 $11,238 $11,937 $12,111 7/19 $11,296 $12,033 $12,211 8/19 $11,456 $12,223 $12,424 9/19 $11,381 $12,125 $12,322 10/19 $11,385 $12,147 $12,348 11/19 $11,389 $12,177 $12,371 12/19 $11,422 $12,215 $12,418 1/20 $11,585 $12,434 $12,650 2/20 $11,721 $12,594 $12,828 3/20 $11,379 $12,137 $12,385 4/20 $11,249 $11,985 $12,179 5/20 $11,545 $12,366 $12,572 6/20 $11,615 $12,468 $12,678 7/20 $11,777 $12,678 $12,891 8/20 $11,723 $12,619 $12,845 9/20 $11,734 $12,621 $12,885 10/20 $11,705 $12,583 $12,844 11/20 $11,868 $12,773 $13,026 12/20 $11,948 $12,851 $13,092 1/21 $12,028 $12,933 $13,219 2/21 $11,835 $12,728 $12,998 3/21 $11,886 $12,806 $13,081 4/21 $11,992 $12,913 $13,191 5/21 $12,056 $12,952 $13,237 6/21 $12,094 $12,988 $13,286 7/21 $12,200 $13,095 $13,403 8/21 $12,156 $13,047 $13,350 9/21 $12,055 $12,953 $13,256 10/21 $12,038 $12,915 $13,209 11/21 $12,131 $13,025 $13,320 12/21 $12,155 $13,046 $13,334 1/22 $11,831 $12,689 $12,979 2/22 $11,758 $12,644 $12,933 3/22 $11,418 $12,234 $12,510 4/22 $11,064 $11,895 $12,160 5/22 $11,187 $12,072 $12,298 6/22 $11,001 $11,874 $12,092 7/22 $11,252 $12,188 $12,416 8/22 $11,009 $11,921 $12,154 9/22 $10,595 $11,463 $11,666 10/22 $10,479 $11,368 $11,559 11/22 $11,034 $11,900 $12,096 12/22 $11,005 $11,934 $12,127 1/23 $11,320 $12,277 $12,494 2/23 $11,020 $11,999 $12,222 3/23 $11,267 $12,265 $12,487 4/23 $11,255 $12,237 $12,461 5/23 $11,171 $12,131 $12,342 6/23 $11,290 $12,253 $12,485 7/23 $11,308 $12,301 $12,558 8/23 $11,164 $12,124 $12,345 9/23 $10,860 $11,769 $11,999 10/23 $10,673 $11,669 $11,885 11/23 $11,386 $12,409 $12,622 12/23 $11,657 $12,698 $12,934 1/24 $11,647 $12,633 $12,884 2/24 $11,652 $12,649 $12,913 3/24 $11,642 $12,649 $12,927 4/24 $11,543 $12,492 $12,770 5/24 $11,548 $12,455 $12,730 6/24 $11,719 $12,646 $12,927 7/24 $11,816 $12,762 $13,022 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 4.50% 0.90% 2.02% Class A with 3.25% Maximum Sales Charge 1.09% 0.24% 1.68% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Pennsylvania Municipal Bond Index 3.70% 1.29% 2.67% | |
| AssetsNet | $ 165,294,458 | $ 165,294,458 |
| Holdings Count | Holding | 105 | 105 |
| Advisory Fees Paid, Amount | $ 602,108 | |
| InvestmentCompanyPortfolioTurnover | 61% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $165,294,458 # of Portfolio Holdings 105 Portfolio Turnover Rate 61% Total Advisory Fees Paid $602,108 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 6.5% Electric Utilities 3.1% Bond Bank 3.9% Housing 4.1% Lease Rev./Cert. of Participation 4.6% Special Tax Revenue 5.0% Water and Sewer 9.0% Education 12.9% General Obligations 13.7% Hospital 18.4% Transportation 18.8% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | Material Fund Changes This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. The net expense ratio decreased from the prior fiscal year primarily due to a decrease in expenses related to financing activities. | |
| Material Fund Change Expenses [Text Block] | The net expense ratio decreased from the prior fiscal year primarily due to a decrease in expenses related to financing activities. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. | |
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000013147 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Pennsylvania Municipal Income Fund | |
| Class Name | Class C | |
| Trading Symbol | ECPAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Pennsylvania Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B433"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $153 1.50% | |
| Expenses Paid, Amount | $ 153 | |
| Expense Ratio, Percent | 1.50% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight exposure to bonds with 17+ years to maturity helped as longer-maturity bonds outperformed shorter-maturity bonds ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections and an overweight position in the transportation sector, which outperformed the Index during the period, contributed to returns ↓ Security selections in A-rated bonds detracted from the Fund’s Index-relative returns during the period ↓ Security selections and an overweight exposure to the water & sewer sector, which underperformed the Index during the period, detracted from returns ↓ An overweight position in the education sector, which underperformed the Index during the period, detracted from Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B438"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Bloomberg Pennsylvania Municipal Bond Index 7/14 $10,000 $10,000 $10,000 8/14 $10,092 $10,121 $10,124 9/14 $10,173 $10,131 $10,136 10/14 $10,211 $10,201 $10,207 11/14 $10,183 $10,218 $10,221 12/14 $10,221 $10,270 $10,275 1/15 $10,324 $10,452 $10,460 2/15 $10,252 $10,344 $10,343 3/15 $10,268 $10,374 $10,377 4/15 $10,239 $10,320 $10,325 5/15 $10,233 $10,291 $10,299 6/15 $10,205 $10,282 $10,287 7/15 $10,266 $10,356 $10,375 8/15 $10,293 $10,377 $10,404 9/15 $10,366 $10,452 $10,475 10/15 $10,393 $10,493 $10,508 11/15 $10,431 $10,535 $10,563 12/15 $10,503 $10,609 $10,640 1/16 $10,598 $10,736 $10,766 2/16 $10,580 $10,753 $10,780 3/16 $10,606 $10,787 $10,822 4/16 $10,667 $10,866 $10,899 5/16 $10,682 $10,895 $10,937 6/16 $10,845 $11,069 $11,114 7/16 $10,824 $11,075 $11,118 8/16 $10,837 $11,090 $11,131 9/16 $10,781 $11,035 $11,066 10/16 $10,679 $10,919 $10,951 11/16 $10,346 $10,512 $10,530 12/16 $10,418 $10,635 $10,665 1/17 $10,457 $10,705 $10,730 2/17 $10,506 $10,780 $10,802 3/17 $10,510 $10,803 $10,843 4/17 $10,571 $10,882 $10,925 5/17 $10,680 $11,054 $11,103 6/17 $10,647 $11,015 $11,090 7/17 $10,686 $11,104 $11,164 8/17 $10,747 $11,188 $11,255 9/17 $10,703 $11,131 $11,181 10/17 $10,694 $11,159 $11,218 11/17 $10,626 $11,099 $11,183 12/17 $10,689 $11,215 $11,307 1/18 $10,620 $11,083 $11,163 2/18 $10,587 $11,050 $11,119 3/18 $10,374 $11,090 $11,169 4/18 $10,354 $11,051 $11,132 5/18 $10,440 $11,177 $11,262 6/18 $10,466 $11,187 $11,276 7/18 $10,484 $11,214 $11,301 8/18 $10,502 $11,243 $11,341 9/18 $10,444 $11,170 $11,270 10/18 $10,386 $11,101 $11,191 11/18 $10,461 $11,224 $11,315 12/18 $10,548 $11,359 $11,472 1/19 $10,610 $11,444 $11,564 2/19 $10,661 $11,506 $11,633 3/19 $10,759 $11,688 $11,838 4/19 $10,773 $11,732 $11,891 5/19 $10,895 $11,893 $12,062 6/19 $10,931 $11,937 $12,111 7/19 $10,992 $12,033 $12,211 8/19 $11,137 $12,223 $12,424 9/19 $11,060 $12,125 $12,322 10/19 $11,045 $12,147 $12,348 11/19 $11,056 $12,177 $12,371 12/19 $11,069 $12,215 $12,418 1/20 $11,240 $12,434 $12,650 2/20 $11,350 $12,594 $12,828 3/20 $11,024 $12,137 $12,385 4/20 $10,884 $11,985 $12,179 5/20 $11,167 $12,366 $12,572 6/20 $11,226 $12,468 $12,678 7/20 $11,371 $12,678 $12,891 8/20 $11,314 $12,619 $12,845 9/20 $11,318 $12,621 $12,885 10/20 $11,285 $12,583 $12,844 11/20 $11,430 $12,773 $13,026 12/20 $11,499 $12,851 $13,092 1/21 $11,566 $12,933 $13,219 2/21 $11,369 $12,728 $12,998 3/21 $11,409 $12,806 $13,081 4/21 $11,514 $12,913 $13,191 5/21 $11,567 $12,952 $13,237 6/21 $11,595 $12,988 $13,286 7/21 $11,688 $13,095 $13,403 8/21 $11,639 $13,047 $13,350 9/21 $11,540 $12,953 $13,256 10/21 $11,505 $12,915 $13,209 11/21 $11,597 $13,025 $13,320 12/21 $11,613 $13,046 $13,334 1/22 $11,294 $12,689 $12,979 2/22 $11,222 $12,644 $12,933 3/22 $10,889 $12,234 $12,510 4/22 $10,544 $11,895 $12,160 5/22 $10,652 $12,072 $12,298 6/22 $10,475 $11,874 $12,092 7/22 $10,713 $12,188 $12,416 8/22 $10,458 $11,921 $12,154 9/22 $10,059 $11,463 $11,666 10/22 $9,948 $11,368 $11,559 11/22 $10,464 $11,900 $12,096 12/22 $10,432 $11,934 $12,127 1/23 $10,727 $12,277 $12,494 2/23 $10,434 $11,999 $12,222 3/23 $10,668 $12,265 $12,487 4/23 $10,651 $12,237 $12,461 5/23 $10,555 $12,131 $12,342 6/23 $10,659 $12,253 $12,485 7/23 $10,669 $12,301 $12,558 8/23 $10,533 $12,124 $12,345 9/23 $10,237 $11,769 $11,999 10/23 $10,047 $11,669 $11,885 11/23 $10,718 $12,409 $12,622 12/23 $10,972 $12,698 $12,934 1/24 $10,957 $12,633 $12,884 2/24 $10,956 $12,649 $12,913 3/24 $10,942 $12,649 $12,927 4/24 $10,832 $12,492 $12,770 5/24 $10,831 $12,455 $12,730 6/24 $10,995 $12,646 $12,927 7/24 $11,511 $12,762 $13,022 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 3.82% 0.15% 1.42% Class C with 1% Maximum Deferred Sales Charge 2.82% 0.15% 1.42% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Pennsylvania Municipal Bond Index 3.70% 1.29% 2.67% | |
| AssetsNet | $ 165,294,458 | $ 165,294,458 |
| Holdings Count | Holding | 105 | 105 |
| Advisory Fees Paid, Amount | $ 602,108 | |
| InvestmentCompanyPortfolioTurnover | 61% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $165,294,458 # of Portfolio Holdings 105 Portfolio Turnover Rate 61% Total Advisory Fees Paid $602,108 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 6.5% Electric Utilities 3.1% Bond Bank 3.9% Housing 4.1% Lease Rev./Cert. of Participation 4.6% Special Tax Revenue 5.0% Water and Sewer 9.0% Education 12.9% General Obligations 13.7% Hospital 18.4% Transportation 18.8% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | Material Fund Changes This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. The net expense ratio decreased from the prior fiscal year primarily due to a decrease in expenses related to financing activities. | |
| Material Fund Change Expenses [Text Block] | The net expense ratio decreased from the prior fiscal year primarily due to a decrease in expenses related to financing activities. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. | |
| Updated Prospectus Phone Number | 1-800-262-1122 | |
| C000063951 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Eaton Vance Pennsylvania Municipal Income Fund | |
| Class Name | Class I | |
| Trading Symbol | EIPAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Pennsylvania Municipal Income Fund for the period of August 1, 2023 to July 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-262-1122 | |
| Additional Information Website | www.eatonvance.com/open-end-mutual-fund-documents.php</span>" id="sjs-B461"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/open-end-mutual-fund-documents.php</span> | |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $56 0.55% | |
| Expenses Paid, Amount | $ 56 | |
| Expense Ratio, Percent | 0.55% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Bloomberg Municipal Bond Index (the Index): ↑ Security selections and an overweight exposure to bonds with 17+ years to maturity helped as longer-maturity bonds outperformed shorter-maturity bonds ↑ Security selections and an overweight position in bonds rated BBB and below helped returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections and an overweight position in the transportation sector, which outperformed the Index during the period, contributed to returns ↓ Security selections in A-rated bonds detracted from the Fund’s Index-relative returns during the period ↓ Security selections and an overweight exposure to the water & sewer sector, which underperformed the Index during the period, detracted from returns ↓ An overweight position in the education sector, which underperformed the Index during the period, detracted from Index-relative returns | |
| Performance Past Does Not Indicate Future [Text] | Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p>" id="sjs-B466"><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">Performance does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. Performance assumes that all dividends and distributions, if any, were reinvested. For more recent performance information, visit <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/performance.php</span>.</p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"></p><p style="box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.</span></p> | |
| Line Graph [Table Text Block] | Class I Bloomberg Municipal Bond Index Bloomberg Pennsylvania Municipal Bond Index 7/14 $1,000,000 $1,000,000 $1,000,000 8/14 $1,010,188 $1,012,107 $1,012,422 9/14 $1,018,177 $1,013,136 $1,013,643 10/14 $1,022,846 $1,020,082 $1,020,658 11/14 $1,021,815 $1,021,847 $1,022,088 12/14 $1,026,452 $1,027,003 $1,027,538 1/15 $1,036,742 $1,045,205 $1,045,977 2/15 $1,031,110 $1,034,424 $1,034,294 3/15 $1,032,293 $1,037,411 $1,037,658 4/15 $1,031,201 $1,031,968 $1,032,451 5/15 $1,030,132 $1,029,117 $1,029,895 6/15 $1,029,099 $1,028,179 $1,028,735 7/15 $1,036,158 $1,035,627 $1,037,452 8/15 $1,039,753 $1,037,660 $1,040,362 9/15 $1,048,049 $1,045,177 $1,047,466 10/15 $1,051,638 $1,049,332 $1,050,815 11/15 $1,055,212 $1,053,504 $1,056,321 12/15 $1,063,524 $1,060,906 $1,063,958 1/16 $1,074,222 $1,073,565 $1,076,612 2/16 $1,073,004 $1,075,253 $1,077,977 3/16 $1,077,759 $1,078,659 $1,082,165 4/16 $1,083,658 $1,086,590 $1,089,876 5/16 $1,087,191 $1,089,529 $1,093,723 6/16 $1,103,873 $1,106,862 $1,111,379 7/16 $1,102,509 $1,107,538 $1,111,771 8/16 $1,105,883 $1,109,032 $1,113,075 9/16 $1,100,782 $1,103,497 $1,106,599 10/16 $1,090,829 $1,091,920 $1,095,099 11/16 $1,056,512 $1,051,197 $1,053,049 12/16 $1,066,112 $1,063,538 $1,066,471 1/17 $1,069,771 $1,070,549 $1,072,985 2/17 $1,075,649 $1,077,983 $1,080,217 3/17 $1,078,098 $1,080,323 $1,084,315 4/17 $1,084,088 $1,088,162 $1,092,484 5/17 $1,096,344 $1,105,432 $1,110,321 6/17 $1,093,670 $1,101,468 $1,108,992 7/17 $1,098,535 $1,110,379 $1,116,389 8/17 $1,105,896 $1,118,829 $1,125,516 9/17 $1,103,214 $1,113,141 $1,118,058 10/17 $1,101,789 $1,115,858 $1,121,781 11/17 $1,096,570 $1,109,883 $1,118,333 12/17 $1,102,793 $1,121,483 $1,130,669 1/18 $1,097,512 $1,108,280 $1,116,299 2/18 $1,094,794 $1,104,969 $1,111,932 3/18 $1,098,480 $1,109,047 $1,116,908 4/18 $1,097,001 $1,105,089 $1,113,200 5/18 $1,107,259 $1,117,744 $1,126,228 6/18 $1,110,937 $1,118,698 $1,127,611 7/18 $1,113,645 $1,121,412 $1,130,094 8/18 $1,116,369 $1,124,292 $1,134,091 9/18 $1,110,839 $1,117,014 $1,127,006 10/18 $1,106,612 $1,110,135 $1,119,112 11/18 $1,114,245 $1,122,422 $1,131,504 12/18 $1,124,629 $1,135,861 $1,147,213 1/19 $1,132,323 $1,144,448 $1,156,394 2/19 $1,138,634 $1,150,575 $1,163,312 3/19 $1,150,317 $1,168,763 $1,183,759 4/19 $1,152,682 $1,173,156 $1,189,143 5/19 $1,165,671 $1,189,329 $1,206,152 6/19 $1,171,794 $1,193,721 $1,211,113 7/19 $1,179,403 $1,203,341 $1,221,061 8/19 $1,194,944 $1,222,322 $1,242,405 9/19 $1,187,318 $1,212,524 $1,232,214 10/19 $1,187,902 $1,214,697 $1,234,847 11/19 $1,188,586 $1,217,735 $1,237,058 12/19 $1,192,215 $1,221,453 $1,241,754 1/20 $1,210,731 $1,243,398 $1,264,993 2/20 $1,223,755 $1,259,432 $1,282,815 3/20 $1,188,354 $1,213,749 $1,238,537 4/20 $1,175,001 $1,198,516 $1,217,870 5/20 $1,206,058 $1,236,643 $1,257,193 6/20 $1,213,490 $1,246,821 $1,267,774 7/20 $1,230,623 $1,267,820 $1,289,113 8/20 $1,226,557 $1,261,872 $1,284,531 9/20 $1,226,552 $1,262,139 $1,288,490 10/20 $1,223,785 $1,258,348 $1,284,385 11/20 $1,240,925 $1,277,337 $1,302,579 12/20 $1,250,946 $1,285,118 $1,309,170 1/21 $1,258,043 $1,293,308 $1,321,863 2/21 $1,238,176 $1,272,759 $1,299,795 3/21 $1,243,664 $1,280,608 $1,308,105 4/21 $1,254,959 $1,291,350 $1,319,129 5/21 $1,261,868 $1,295,202 $1,323,669 6/21 $1,265,984 $1,298,759 $1,328,575 7/21 $1,277,337 $1,309,530 $1,340,339 8/21 $1,272,884 $1,304,724 $1,335,025 9/21 $1,262,625 $1,295,309 $1,325,570 10/21 $1,261,011 $1,291,521 $1,320,872 11/21 $1,272,446 $1,302,516 $1,331,989 12/21 $1,273,730 $1,304,617 $1,333,416 1/22 $1,240,051 $1,268,906 $1,297,913 2/22 $1,234,143 $1,264,360 $1,293,320 3/22 $1,197,392 $1,223,373 $1,251,045 4/22 $1,160,559 $1,189,535 $1,215,976 5/22 $1,173,648 $1,207,206 $1,229,795 6/22 $1,154,439 $1,187,434 $1,209,209 7/22 $1,180,892 $1,218,808 $1,241,644 8/22 $1,155,674 $1,192,096 $1,215,365 9/22 $1,112,528 $1,146,342 $1,166,623 10/22 $1,100,669 $1,136,809 $1,155,850 11/22 $1,158,927 $1,189,982 $1,209,585 12/22 $1,156,089 $1,193,388 $1,212,739 1/23 $1,189,211 $1,227,669 $1,249,412 2/23 $1,158,038 $1,199,909 $1,222,199 3/23 $1,184,123 $1,226,532 $1,248,662 4/23 $1,183,059 $1,223,730 $1,246,140 5/23 $1,174,422 $1,213,125 $1,234,214 6/23 $1,185,608 $1,225,277 $1,248,495 7/23 $1,189,185 $1,230,125 $1,255,763 8/23 $1,174,402 $1,212,415 $1,234,457 9/23 $1,142,710 $1,176,881 $1,199,864 10/23 $1,121,725 $1,166,866 $1,188,479 11/23 $1,198,242 $1,240,940 $1,262,217 12/23 $1,226,846 $1,269,782 $1,293,394 1/24 $1,226,018 $1,263,297 $1,288,350 2/24 $1,226,790 $1,264,919 $1,291,268 3/24 $1,225,998 $1,264,879 $1,292,674 4/24 $1,214,213 $1,249,214 $1,276,997 5/24 $1,216,555 $1,245,550 $1,272,957 6/24 $1,234,743 $1,264,642 $1,292,661 7/24 $1,245,083 $1,276,168 $1,302,214 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 4.70% 1.09% 2.21% Bloomberg Municipal Bond Index 3.74% 1.18% 2.47% Bloomberg Pennsylvania Municipal Bond Index 3.70% 1.29% 2.67% | |
| AssetsNet | $ 165,294,458 | $ 165,294,458 |
| Holdings Count | Holding | 105 | 105 |
| Advisory Fees Paid, Amount | $ 602,108 | |
| InvestmentCompanyPortfolioTurnover | 61% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $165,294,458 # of Portfolio Holdings 105 Portfolio Turnover Rate 61% Total Advisory Fees Paid $602,108 | |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 6.5% Electric Utilities 3.1% Bond Bank 3.9% Housing 4.1% Lease Rev./Cert. of Participation 4.6% Special Tax Revenue 5.0% Water and Sewer 9.0% Education 12.9% General Obligations 13.7% Hospital 18.4% Transportation 18.8% Footnote Description Footnote * Sectors less than 3% each | |
| Material Fund Change [Text Block] | Material Fund Changes This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. The net expense ratio decreased from the prior fiscal year primarily due to a decrease in expenses related to financing activities. | |
| Material Fund Change Expenses [Text Block] | The net expense ratio decreased from the prior fiscal year primarily due to a decrease in expenses related to financing activities. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 31, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by December 1, 2024 at www.eatonvance.com/open-end-mutual-fund-documents.php 1-800-262-1122. | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Jul. 31, 2024 | Jun. 30, 2024 | May 31, 2024 | Apr. 30, 2024 | Mar. 31, 2024 | Feb. 29, 2024 | Jan. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2023 | Oct. 31, 2023 | Sep. 30, 2023 | Aug. 31, 2023 | Jul. 31, 2023 | Jun. 30, 2023 | May 31, 2023 | Apr. 30, 2023 | Mar. 31, 2023 | Feb. 28, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Oct. 31, 2022 | Sep. 30, 2022 | Aug. 31, 2022 | Jul. 31, 2022 | Jun. 30, 2022 | May 31, 2022 | Apr. 30, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | Jan. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2021 | Oct. 31, 2021 | Sep. 30, 2021 | Aug. 31, 2021 | Jul. 31, 2021 | Jun. 30, 2021 | May 31, 2021 | Apr. 30, 2021 | Mar. 31, 2021 | Feb. 28, 2021 | Jan. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2020 | Oct. 31, 2020 | Sep. 30, 2020 | Aug. 31, 2020 | Jul. 31, 2020 | Jun. 30, 2020 | May 31, 2020 | Apr. 30, 2020 | Mar. 31, 2020 | Feb. 29, 2020 | Jan. 31, 2020 | Dec. 31, 2019 | Nov. 30, 2019 | Oct. 31, 2019 | Sep. 30, 2019 | Aug. 31, 2019 | Jul. 31, 2019 | Jun. 30, 2019 | May 31, 2019 | Apr. 30, 2019 | Mar. 31, 2019 | Feb. 28, 2019 | Jan. 31, 2019 | Dec. 31, 2018 | Nov. 30, 2018 | Oct. 31, 2018 | Sep. 30, 2018 | Aug. 31, 2018 | Jul. 31, 2018 | Jun. 30, 2018 | May 31, 2018 | Apr. 30, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Nov. 30, 2017 | Oct. 31, 2017 | Sep. 30, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | Jun. 30, 2017 | May 31, 2017 | Apr. 30, 2017 | Mar. 31, 2017 | Feb. 28, 2017 | Jan. 31, 2017 | Dec. 31, 2016 | Nov. 30, 2016 | Oct. 31, 2016 | Sep. 30, 2016 | Aug. 31, 2016 | Jul. 31, 2016 | Jun. 30, 2016 | May 31, 2016 | Apr. 30, 2016 | Mar. 31, 2016 | Feb. 29, 2016 | Jan. 31, 2016 | Dec. 31, 2015 | Nov. 30, 2015 | Oct. 31, 2015 | Sep. 30, 2015 | Aug. 31, 2015 | Jul. 31, 2015 | Jun. 30, 2015 | May 31, 2015 | Apr. 30, 2015 | Mar. 31, 2015 | Feb. 28, 2015 | Jan. 31, 2015 | Dec. 31, 2014 | Nov. 30, 2014 | Oct. 31, 2014 | Sep. 30, 2014 | Aug. 31, 2014 | Aug. 17, 2014 | Jul. 31, 2014 | |
| C000013133 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,057 | $ 11,953 | $ 11,762 | $ 11,744 | $ 11,858 | $ 11,867 | $ 11,850 | $ 11,873 | $ 11,595 | $ 10,901 | $ 11,067 | $ 11,349 | $ 11,462 | $ 11,449 | $ 11,356 | $ 11,444 | $ 11,456 | $ 11,238 | $ 11,492 | $ 11,213 | $ 11,201 | $ 10,797 | $ 10,862 | $ 11,218 | $ 11,436 | $ 11,214 | $ 11,341 | $ 11,257 | $ 11,522 | $ 11,839 | $ 11,892 | $ 12,182 | $ 12,174 | $ 12,091 | $ 12,108 | $ 12,212 | $ 12,243 | $ 12,163 | $ 12,143 | $ 12,087 | $ 11,993 | $ 11,936 | $ 12,147 | $ 12,103 | $ 12,031 | $ 11,860 | $ 11,895 | $ 11,893 | $ 11,951 | $ 11,780 | $ 11,729 | $ 11,367 | $ 11,519 | $ 11,910 | $ 11,752 | $ 11,560 | $ 11,533 | $ 11,520 | $ 11,520 | $ 11,602 | $ 11,450 | $ 11,355 | $ 11,319 | $ 11,202 | $ 11,154 | $ 11,013 | $ 10,952 | $ 10,870 | $ 10,764 | $ 10,670 | $ 10,736 | $ 10,792 | $ 10,789 | $ 10,763 | $ 10,745 | $ 10,612 | $ 10,643 | $ 10,594 | $ 10,646 | $ 10,777 | $ 10,639 | $ 10,669 | $ 10,677 | $ 10,696 | $ 10,626 | $ 10,567 | $ 10,607 | $ 10,450 | $ 10,379 | $ 10,352 | $ 10,302 | $ 10,277 | $ 10,163 | $ 10,527 | $ 10,620 | $ 10,658 | $ 10,589 | $ 10,627 | $ 10,482 | $ 10,445 | $ 10,353 | $ 10,284 | $ 10,310 | $ 10,206 | $ 10,104 | $ 10,032 | $ 9,993 | $ 9,942 | $ 9,934 | $ 9,895 | $ 9,928 | $ 9,971 | $ 10,024 | $ 9,990 | $ 10,114 | $ 9,943 | $ 9,853 | $ 9,874 | $ 9,814 | $ 9,784 | $ 9,675 | |
| C000013135 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000092720 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013173 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,972 | 11,873 | 11,705 | 11,713 | 11,822 | 11,830 | 11,813 | 11,834 | 11,547 | 10,815 | 10,971 | 11,288 | 11,433 | 11,406 | 11,319 | 11,427 | 11,439 | 11,208 | 11,473 | 11,184 | 11,184 | 10,668 | 10,727 | 11,098 | 11,386 | 11,102 | 11,282 | 11,179 | 11,454 | 11,753 | 11,813 | 12,087 | 12,090 | 11,998 | 12,024 | 12,120 | 12,158 | 12,068 | 12,044 | 11,999 | 11,918 | 11,872 | 12,055 | 11,987 | 11,906 | 11,754 | 11,777 | 11,765 | 11,809 | 11,636 | 11,542 | 11,256 | 11,433 | 11,767 | 11,639 | 11,470 | 11,443 | 11,439 | 11,434 | 11,505 | 11,357 | 11,264 | 11,216 | 11,090 | 11,074 | 10,959 | 10,909 | 10,839 | 10,735 | 10,642 | 10,702 | 10,762 | 10,736 | 10,677 | 10,659 | 10,576 | 10,601 | 10,582 | 10,627 | 10,695 | 10,614 | 10,669 | 10,694 | 10,697 | 10,648 | 10,589 | 10,633 | 10,543 | 10,453 | 10,436 | 10,387 | 10,359 | 10,302 | 10,612 | 10,696 | 10,718 | 10,640 | 10,642 | 10,493 | 10,494 | 10,425 | 10,386 | 10,366 | 10,239 | 10,171 | 10,122 | 10,084 | 10,016 | 10,017 | 9,960 | 9,989 | 10,017 | 10,065 | 10,037 | 10,142 | 9,961 | 9,895 | 9,904 | 9,837 | 9,817 | 9,675 | |
| C000013172 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063955 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013114 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,708 | 11,624 | 11,477 | 11,472 | 11,583 | 11,604 | 11,599 | 11,621 | 11,377 | 10,626 | 10,787 | 11,137 | 11,261 | 11,252 | 11,165 | 11,265 | 11,292 | 11,108 | 11,320 | 11,064 | 11,055 | 10,664 | 10,717 | 11,053 | 11,256 | 11,043 | 11,170 | 11,031 | 11,259 | 11,524 | 11,569 | 11,821 | 11,818 | 11,754 | 11,775 | 11,855 | 11,888 | 11,799 | 11,782 | 11,754 | 11,677 | 11,637 | 11,798 | 11,757 | 11,717 | 11,579 | 11,621 | 11,616 | 11,659 | 11,512 | 11,471 | 11,135 | 11,270 | 11,568 | 11,456 | 11,286 | 11,255 | 11,246 | 11,251 | 11,336 | 11,165 | 11,076 | 11,033 | 10,909 | 10,877 | 10,741 | 10,684 | 10,605 | 10,479 | 10,376 | 10,445 | 10,514 | 10,492 | 10,481 | 10,481 | 10,368 | 10,414 | 10,358 | 10,412 | 10,567 | 10,467 | 10,500 | 10,499 | 10,542 | 10,476 | 10,431 | 10,473 | 10,307 | 10,240 | 10,218 | 10,172 | 10,149 | 10,037 | 10,377 | 10,472 | 10,523 | 10,499 | 10,518 | 10,376 | 10,363 | 10,284 | 10,249 | 10,257 | 10,168 | 10,110 | 10,071 | 10,034 | 9,975 | 9,959 | 9,922 | 9,916 | 9,931 | 9,957 | 9,951 | 9,996 | 9,868 | 9,822 | 9,836 | 9,809 | 9,772 | 9,675 | |
| C000013116 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000092718 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000100969 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,488 | 12,371 | 12,173 | 12,162 | 12,270 | 12,248 | 12,236 | 12,213 | 11,934 | 11,235 | 11,396 | 11,706 | 11,856 | 11,827 | 11,732 | 11,798 | 11,821 | 11,613 | 11,845 | 11,520 | 11,521 | 11,097 | 11,197 | 11,567 | 11,780 | 11,541 | 11,766 | 11,693 | 12,031 | 12,382 | 12,455 | 12,775 | 12,775 | 12,667 | 12,711 | 12,825 | 12,870 | 12,766 | 12,700 | 12,625 | 12,520 | 12,482 | 12,631 | 12,450 | 12,281 | 12,081 | 12,098 | 12,104 | 12,103 | 11,885 | 11,578 | 11,225 | 11,563 | 12,358 | 12,172 | 11,969 | 11,930 | 11,910 | 11,899 | 11,975 | 11,829 | 11,751 | 11,701 | 11,565 | 11,534 | 11,399 | 11,338 | 11,231 | 11,133 | 11,044 | 11,116 | 11,170 | 11,158 | 11,108 | 11,096 | 10,964 | 10,998 | 10,969 | 10,995 | 11,114 | 11,022 | 11,070 | 11,082 | 11,102 | 11,002 | 10,911 | 10,938 | 10,783 | 10,672 | 10,625 | 10,549 | 10,504 | 10,421 | 10,882 | 11,002 | 11,031 | 10,998 | 11,000 | 10,797 | 10,774 | 10,678 | 10,619 | 10,612 | 10,464 | 10,385 | 10,304 | 10,259 | 10,144 | 10,127 | 10,041 | 10,086 | 10,134 | 10,182 | 10,126 | 10,263 | 10,059 | 9,960 | 9,961 | 9,891 | 9,847 | 9,675 | |
| C000100970 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000100971 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013127 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,211 | 12,104 | 11,931 | 11,941 | 12,063 | 12,075 | 12,072 | 12,099 | 11,849 | 11,254 | 11,377 | 11,650 | 11,759 | 11,731 | 11,634 | 11,727 | 11,725 | 11,495 | 11,750 | 11,453 | 11,439 | 10,956 | 11,050 | 11,452 | 11,747 | 11,457 | 11,633 | 11,543 | 11,918 | 12,280 | 12,364 | 12,698 | 12,694 | 12,595 | 12,622 | 12,729 | 12,783 | 12,682 | 12,644 | 12,594 | 12,491 | 12,428 | 12,659 | 12,531 | 12,415 | 12,222 | 12,247 | 12,233 | 12,257 | 12,038 | 11,934 | 11,515 | 11,788 | 12,337 | 12,145 | 11,892 | 11,863 | 11,848 | 11,847 | 11,944 | 11,708 | 11,608 | 11,543 | 11,380 | 11,327 | 11,153 | 11,088 | 10,999 | 10,884 | 10,781 | 10,836 | 10,902 | 10,872 | 10,817 | 10,787 | 10,673 | 10,701 | 10,658 | 10,686 | 10,785 | 10,718 | 10,744 | 10,747 | 10,760 | 10,670 | 10,616 | 10,631 | 10,474 | 10,386 | 10,344 | 10,290 | 10,294 | 10,208 | 10,583 | 10,654 | 10,680 | 10,627 | 10,629 | 10,487 | 10,458 | 10,394 | 10,331 | 10,343 | 10,236 | 10,140 | 10,087 | 10,045 | 9,960 | 9,952 | 9,879 | 9,923 | 9,915 | 9,949 | 9,940 | 9,984 | 9,892 | 9,842 | 9,876 | 9,858 | 9,787 | 9,675 | |
| C000013129 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063948 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013145 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,816 | 11,719 | 11,548 | 11,543 | 11,642 | 11,652 | 11,647 | 11,657 | 11,386 | 10,673 | 10,860 | 11,164 | 11,308 | 11,290 | 11,171 | 11,255 | 11,267 | 11,020 | 11,320 | 11,005 | 11,034 | 10,479 | 10,595 | 11,009 | 11,252 | 11,001 | 11,187 | 11,064 | 11,418 | 11,758 | 11,831 | 12,155 | 12,131 | 12,038 | 12,055 | 12,156 | 12,200 | 12,094 | 12,056 | 11,992 | 11,886 | 11,835 | 12,028 | 11,948 | 11,868 | 11,705 | 11,734 | 11,723 | 11,777 | 11,615 | 11,545 | 11,249 | 11,379 | 11,721 | 11,585 | 11,422 | 11,389 | 11,385 | 11,381 | 11,456 | 11,296 | 11,238 | 11,181 | 11,058 | 11,024 | 10,926 | 10,867 | 10,795 | 10,697 | 10,613 | 10,668 | 10,723 | 10,699 | 10,675 | 10,641 | 10,544 | 10,560 | 10,527 | 10,542 | 10,607 | 10,537 | 10,602 | 10,605 | 10,645 | 10,576 | 10,531 | 10,558 | 10,442 | 10,374 | 10,364 | 10,309 | 10,275 | 10,185 | 10,518 | 10,605 | 10,656 | 10,637 | 10,641 | 10,481 | 10,460 | 10,393 | 10,361 | 10,374 | 10,272 | 10,194 | 10,150 | 10,117 | 10,038 | 10,005 | 9,949 | 9,961 | 9,962 | 9,986 | 9,965 | 10,032 | 9,923 | 9,880 | 9,902 | 9,859 | 9,772 | 9,675 | |
| C000013147 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063951 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,276,168 | 1,264,642 | 1,245,550 | 1,249,214 | 1,264,879 | 1,264,919 | 1,263,297 | 1,269,782 | 1,240,940 | 1,166,866 | 1,176,881 | 1,212,415 | 1,230,125 | 1,225,277 | 1,213,125 | 1,223,730 | 1,226,532 | 1,199,909 | 1,227,669 | 1,193,388 | 1,189,982 | 1,136,809 | 1,146,342 | 1,192,096 | 1,218,808 | 1,187,434 | 1,207,206 | 1,189,535 | 1,223,373 | 1,264,360 | 1,268,906 | 1,304,617 | 1,302,516 | 1,291,521 | 1,295,309 | 1,304,724 | 1,309,530 | 1,298,759 | 1,295,202 | 1,291,350 | 1,280,608 | 1,272,759 | 1,293,308 | 1,285,118 | 1,277,337 | 1,258,348 | 1,262,139 | 1,261,872 | 1,267,820 | 1,246,821 | 1,236,643 | 1,198,516 | 1,213,749 | 1,259,432 | 1,243,398 | 1,221,453 | 1,217,735 | 1,214,697 | 1,212,524 | 1,222,322 | 1,203,341 | 1,193,721 | 1,189,329 | 1,173,156 | 1,168,763 | 1,150,575 | 1,144,448 | 1,135,861 | 1,122,422 | 1,110,135 | 1,117,014 | 1,124,292 | 1,121,412 | 1,118,698 | 1,117,744 | 1,105,089 | 1,109,047 | 1,104,969 | 1,108,280 | 1,121,483 | 1,109,883 | 1,115,858 | 1,113,141 | 1,118,829 | 1,110,379 | 1,101,468 | 1,105,432 | 1,088,162 | 1,080,323 | 1,077,983 | 1,070,549 | 1,063,538 | 1,051,197 | 1,091,920 | 1,103,497 | 1,109,032 | 1,107,538 | 1,106,862 | 1,089,529 | 1,086,590 | 1,078,659 | 1,075,253 | 1,073,565 | 1,060,906 | 1,053,504 | 1,049,332 | 1,045,177 | 1,037,660 | 1,035,627 | 1,028,179 | 1,029,117 | 1,031,968 | 1,037,411 | 1,034,424 | 1,045,205 | 1,027,003 | 1,021,847 | 1,020,082 | 1,013,136 | 1,012,107 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,276,168 | 1,264,642 | 1,245,550 | 1,249,214 | 1,264,879 | 1,264,919 | 1,263,297 | 1,269,782 | 1,240,940 | 1,166,866 | 1,176,881 | 1,212,415 | 1,230,125 | 1,225,277 | 1,213,125 | 1,223,730 | 1,226,532 | 1,199,909 | 1,227,669 | 1,193,388 | 1,189,982 | 1,136,809 | 1,146,342 | 1,192,096 | 1,218,808 | 1,187,434 | 1,207,206 | 1,189,535 | 1,223,373 | 1,264,360 | 1,268,906 | 1,304,617 | 1,302,516 | 1,291,521 | 1,295,309 | 1,304,724 | 1,309,530 | 1,298,759 | 1,295,202 | 1,291,350 | 1,280,608 | 1,272,759 | 1,293,308 | 1,285,118 | 1,277,337 | 1,258,348 | 1,262,139 | 1,261,872 | 1,267,820 | 1,246,821 | 1,236,643 | 1,198,516 | 1,213,749 | 1,259,432 | 1,243,398 | 1,221,453 | 1,217,735 | 1,214,697 | 1,212,524 | 1,222,322 | 1,203,341 | 1,193,721 | 1,189,329 | 1,173,156 | 1,168,763 | 1,150,575 | 1,144,448 | 1,135,861 | 1,122,422 | 1,110,135 | 1,117,014 | 1,124,292 | 1,121,412 | 1,118,698 | 1,117,744 | 1,105,089 | 1,109,047 | 1,104,969 | 1,108,280 | 1,121,483 | 1,109,883 | 1,115,858 | 1,113,141 | 1,118,829 | 1,110,379 | 1,101,468 | 1,105,432 | 1,088,162 | 1,080,323 | 1,077,983 | 1,070,549 | 1,063,538 | 1,051,197 | 1,091,920 | 1,103,497 | 1,109,032 | 1,107,538 | 1,106,862 | 1,089,529 | 1,086,590 | 1,078,659 | 1,075,253 | 1,073,565 | 1,060,906 | 1,053,504 | 1,049,332 | 1,045,177 | 1,037,660 | 1,035,627 | 1,028,179 | 1,029,117 | 1,031,968 | 1,037,411 | 1,034,424 | 1,045,205 | 1,027,003 | 1,021,847 | 1,020,082 | 1,013,136 | 1,012,107 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,276,168 | 1,264,642 | 1,245,550 | 1,249,214 | 1,264,879 | 1,264,919 | 1,263,297 | 1,269,782 | 1,240,940 | 1,166,866 | 1,176,881 | 1,212,415 | 1,230,125 | 1,225,277 | 1,213,125 | 1,223,730 | 1,226,532 | 1,199,909 | 1,227,669 | 1,193,388 | 1,189,982 | 1,136,809 | 1,146,342 | 1,192,096 | 1,218,808 | 1,187,434 | 1,207,206 | 1,189,535 | 1,223,373 | 1,264,360 | 1,268,906 | 1,304,617 | 1,302,516 | 1,291,521 | 1,295,309 | 1,304,724 | 1,309,530 | 1,298,759 | 1,295,202 | 1,291,350 | 1,280,608 | 1,272,759 | 1,293,308 | 1,285,118 | 1,277,337 | 1,258,348 | 1,262,139 | 1,261,872 | 1,267,820 | 1,246,821 | 1,236,643 | 1,198,516 | 1,213,749 | 1,259,432 | 1,243,398 | 1,221,453 | 1,217,735 | 1,214,697 | 1,212,524 | 1,222,322 | 1,203,341 | 1,193,721 | 1,189,329 | 1,173,156 | 1,168,763 | 1,150,575 | 1,144,448 | 1,135,861 | 1,122,422 | 1,110,135 | 1,117,014 | 1,124,292 | 1,121,412 | 1,118,698 | 1,117,744 | 1,105,089 | 1,109,047 | 1,104,969 | 1,108,280 | 1,121,483 | 1,109,883 | 1,115,858 | 1,113,141 | 1,118,829 | 1,110,379 | 1,101,468 | 1,105,432 | 1,088,162 | 1,080,323 | 1,077,983 | 1,070,549 | 1,063,538 | 1,051,197 | 1,091,920 | 1,103,497 | 1,109,032 | 1,107,538 | 1,106,862 | 1,089,529 | 1,086,590 | 1,078,659 | 1,075,253 | 1,073,565 | 1,060,906 | 1,053,504 | 1,049,332 | 1,045,177 | 1,037,660 | 1,035,627 | 1,028,179 | 1,029,117 | 1,031,968 | 1,037,411 | 1,034,424 | 1,045,205 | 1,027,003 | 1,021,847 | 1,020,082 | 1,013,136 | 1,012,107 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,660 | 12,546 | 12,356 | 12,393 | 12,548 | 12,548 | 12,532 | 12,597 | 12,311 | 11,576 | 11,675 | 12,028 | 12,203 | 12,155 | 12,035 | 12,140 | 12,168 | 11,904 | 12,179 | 11,839 | 11,805 | 11,278 | 11,372 | 11,826 | 12,091 | 11,780 | 11,976 | 11,801 | 12,136 | 12,543 | 12,588 | 12,942 | 12,921 | 12,812 | 12,850 | 12,943 | 12,991 | 12,884 | 12,849 | 12,811 | 12,704 | 12,626 | 12,830 | 12,749 | 12,672 | 12,483 | 12,521 | 12,518 | 12,577 | 12,369 | 12,268 | 11,890 | 12,041 | 12,494 | 12,335 | 12,117 | 12,080 | 12,050 | 12,029 | 12,126 | 11,938 | 11,842 | 11,799 | 11,638 | 11,595 | 11,414 | 11,353 | 11,268 | 11,135 | 11,013 | 11,081 | 11,153 | 11,125 | 11,098 | 11,088 | 10,963 | 11,002 | 10,962 | 10,995 | 11,126 | 11,010 | 11,070 | 11,043 | 11,099 | 11,015 | 10,927 | 10,966 | 10,795 | 10,717 | 10,694 | 10,620 | 10,551 | 10,428 | 10,832 | 10,947 | 11,002 | 10,987 | 10,981 | 10,809 | 10,779 | 10,701 | 10,667 | 10,650 | 10,525 | 10,451 | 10,410 | 10,369 | 10,294 | 10,274 | 10,200 | 10,209 | 10,238 | 10,292 | 10,262 | 10,369 | 10,188 | 10,137 | 10,120 | 10,051 | 10,040 | $ 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,276,168 | 1,264,642 | 1,245,550 | 1,249,214 | 1,264,879 | 1,264,919 | 1,263,297 | 1,269,782 | 1,240,940 | 1,166,866 | 1,176,881 | 1,212,415 | 1,230,125 | 1,225,277 | 1,213,125 | 1,223,730 | 1,226,532 | 1,199,909 | 1,227,669 | 1,193,388 | 1,189,982 | 1,136,809 | 1,146,342 | 1,192,096 | 1,218,808 | 1,187,434 | 1,207,206 | 1,189,535 | 1,223,373 | 1,264,360 | 1,268,906 | 1,304,617 | 1,302,516 | 1,291,521 | 1,295,309 | 1,304,724 | 1,309,530 | 1,298,759 | 1,295,202 | 1,291,350 | 1,280,608 | 1,272,759 | 1,293,308 | 1,285,118 | 1,277,337 | 1,258,348 | 1,262,139 | 1,261,872 | 1,267,820 | 1,246,821 | 1,236,643 | 1,198,516 | 1,213,749 | 1,259,432 | 1,243,398 | 1,221,453 | 1,217,735 | 1,214,697 | 1,212,524 | 1,222,322 | 1,203,341 | 1,193,721 | 1,189,329 | 1,173,156 | 1,168,763 | 1,150,575 | 1,144,448 | 1,135,861 | 1,122,422 | 1,110,135 | 1,117,014 | 1,124,292 | 1,121,412 | 1,118,698 | 1,117,744 | 1,105,089 | 1,109,047 | 1,104,969 | 1,108,280 | 1,121,483 | 1,109,883 | 1,115,858 | 1,113,141 | 1,118,829 | 1,110,379 | 1,101,468 | 1,105,432 | 1,088,162 | 1,080,323 | 1,077,983 | 1,070,549 | 1,063,538 | 1,051,197 | 1,091,920 | 1,103,497 | 1,109,032 | 1,107,538 | 1,106,862 | 1,089,529 | 1,086,590 | 1,078,659 | 1,075,253 | 1,073,565 | 1,060,906 | 1,053,504 | 1,049,332 | 1,045,177 | 1,037,660 | 1,035,627 | 1,028,179 | 1,029,117 | 1,031,968 | 1,037,411 | 1,034,424 | 1,045,205 | 1,027,003 | 1,021,847 | 1,020,082 | 1,013,136 | 1,012,107 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,276,168 | 1,264,642 | 1,245,550 | 1,249,214 | 1,264,879 | 1,264,919 | 1,263,297 | 1,269,782 | 1,240,940 | 1,166,866 | 1,176,881 | 1,212,415 | 1,230,125 | 1,225,277 | 1,213,125 | 1,223,730 | 1,226,532 | 1,199,909 | 1,227,669 | 1,193,388 | 1,189,982 | 1,136,809 | 1,146,342 | 1,192,096 | 1,218,808 | 1,187,434 | 1,207,206 | 1,189,535 | 1,223,373 | 1,264,360 | 1,268,906 | 1,304,617 | 1,302,516 | 1,291,521 | 1,295,309 | 1,304,724 | 1,309,530 | 1,298,759 | 1,295,202 | 1,291,350 | 1,280,608 | 1,272,759 | 1,293,308 | 1,285,118 | 1,277,337 | 1,258,348 | 1,262,139 | 1,261,872 | 1,267,820 | 1,246,821 | 1,236,643 | 1,198,516 | 1,213,749 | 1,259,432 | 1,243,398 | 1,221,453 | 1,217,735 | 1,214,697 | 1,212,524 | 1,222,322 | 1,203,341 | 1,193,721 | 1,189,329 | 1,173,156 | 1,168,763 | 1,150,575 | 1,144,448 | 1,135,861 | 1,122,422 | 1,110,135 | 1,117,014 | 1,124,292 | 1,121,412 | 1,118,698 | 1,117,744 | 1,105,089 | 1,109,047 | 1,104,969 | 1,108,280 | 1,121,483 | 1,109,883 | 1,115,858 | 1,113,141 | 1,118,829 | 1,110,379 | 1,101,468 | 1,105,432 | 1,088,162 | 1,080,323 | 1,077,983 | 1,070,549 | 1,063,538 | 1,051,197 | 1,091,920 | 1,103,497 | 1,109,032 | 1,107,538 | 1,106,862 | 1,089,529 | 1,086,590 | 1,078,659 | 1,075,253 | 1,073,565 | 1,060,906 | 1,053,504 | 1,049,332 | 1,045,177 | 1,037,660 | 1,035,627 | 1,028,179 | 1,029,117 | 1,031,968 | 1,037,411 | 1,034,424 | 1,045,205 | 1,027,003 | 1,021,847 | 1,020,082 | 1,013,136 | 1,012,107 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,762 | 12,646 | 12,455 | 12,492 | 12,649 | 12,649 | 12,633 | 12,698 | 12,409 | 11,669 | 11,769 | 12,124 | 12,301 | 12,253 | 12,131 | 12,237 | 12,265 | 11,999 | 12,277 | 11,934 | 11,900 | 11,368 | 11,463 | 11,921 | 12,188 | 11,874 | 12,072 | 11,895 | 12,234 | 12,644 | 12,689 | 13,046 | 13,025 | 12,915 | 12,953 | 13,047 | 13,095 | 12,988 | 12,952 | 12,913 | 12,806 | 12,728 | 12,933 | 12,851 | 12,773 | 12,583 | 12,621 | 12,619 | 12,678 | 12,468 | 12,366 | 11,985 | 12,137 | 12,594 | 12,434 | 12,215 | 12,177 | 12,147 | 12,125 | 12,223 | 12,033 | 11,937 | 11,893 | 11,732 | 11,688 | 11,506 | 11,444 | 11,359 | 11,224 | 11,101 | 11,170 | 11,243 | 11,214 | 11,187 | 11,177 | 11,051 | 11,090 | 11,050 | 11,083 | 11,215 | 11,099 | 11,159 | 11,131 | 11,188 | 11,104 | 11,015 | 11,054 | 10,882 | 10,803 | 10,780 | 10,705 | 10,635 | 10,512 | 10,919 | 11,035 | 11,090 | 11,075 | 11,069 | 10,895 | 10,866 | 10,787 | 10,753 | 10,736 | 10,609 | 10,535 | 10,493 | 10,452 | 10,377 | 10,356 | 10,282 | 10,291 | 10,320 | 10,374 | 10,344 | 10,452 | 10,270 | 10,218 | 10,201 | 10,131 | 10,121 | 10,000 | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,276,168 | 1,264,642 | 1,245,550 | 1,249,214 | 1,264,879 | 1,264,919 | 1,263,297 | 1,269,782 | 1,240,940 | 1,166,866 | 1,176,881 | 1,212,415 | 1,230,125 | 1,225,277 | 1,213,125 | 1,223,730 | 1,226,532 | 1,199,909 | 1,227,669 | 1,193,388 | 1,189,982 | 1,136,809 | 1,146,342 | 1,192,096 | 1,218,808 | 1,187,434 | 1,207,206 | 1,189,535 | 1,223,373 | 1,264,360 | 1,268,906 | 1,304,617 | 1,302,516 | 1,291,521 | 1,295,309 | 1,304,724 | 1,309,530 | 1,298,759 | 1,295,202 | 1,291,350 | 1,280,608 | 1,272,759 | 1,293,308 | 1,285,118 | 1,277,337 | 1,258,348 | 1,262,139 | 1,261,872 | 1,267,820 | 1,246,821 | 1,236,643 | 1,198,516 | 1,213,749 | 1,259,432 | 1,243,398 | 1,221,453 | 1,217,735 | 1,214,697 | 1,212,524 | 1,222,322 | 1,203,341 | 1,193,721 | 1,189,329 | 1,173,156 | 1,168,763 | 1,150,575 | 1,144,448 | 1,135,861 | 1,122,422 | 1,110,135 | 1,117,014 | 1,124,292 | 1,121,412 | 1,118,698 | 1,117,744 | 1,105,089 | 1,109,047 | 1,104,969 | 1,108,280 | 1,121,483 | 1,109,883 | 1,115,858 | 1,113,141 | 1,118,829 | 1,110,379 | 1,101,468 | 1,105,432 | 1,088,162 | 1,080,323 | 1,077,983 | 1,070,549 | 1,063,538 | 1,051,197 | 1,091,920 | 1,103,497 | 1,109,032 | 1,107,538 | 1,106,862 | 1,089,529 | 1,086,590 | 1,078,659 | 1,075,253 | 1,073,565 | 1,060,906 | 1,053,504 | 1,049,332 | 1,045,177 | 1,037,660 | 1,035,627 | 1,028,179 | 1,029,117 | 1,031,968 | 1,037,411 | 1,034,424 | 1,045,205 | 1,027,003 | 1,021,847 | 1,020,082 | 1,013,136 | 1,012,107 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Arizona Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,544 | 12,445 | 12,259 | 12,277 | 12,411 | 12,423 | 12,397 | 12,473 | 12,180 | 11,498 | 11,581 | 11,904 | 12,067 | 12,002 | 11,918 | 12,018 | 12,057 | 11,804 | 12,068 | 11,762 | 11,708 | 11,219 | 11,315 | 11,773 | 12,018 | 11,724 | 11,906 | 11,741 | 12,090 | 12,487 | 12,522 | 12,861 | 12,846 | 12,746 | 12,777 | 12,870 | 12,904 | 12,796 | 12,777 | 12,745 | 12,654 | 12,579 | 12,761 | 12,705 | 12,640 | 12,455 | 12,492 | 12,489 | 12,543 | 12,368 | 12,291 | 11,922 | 11,975 | 12,472 | 12,308 | 12,093 | 12,058 | 12,031 | 11,999 | 12,114 | 11,936 | 11,837 | 11,796 | 11,652 | 11,610 | 11,437 | 11,380 | 11,294 | 11,170 | 11,051 | 11,110 | 11,181 | 11,157 | 11,140 | 11,123 | 11,007 | 11,047 | 11,002 | 11,038 | 11,172 | 11,051 | 11,125 | 11,095 | 11,163 | 11,088 | 11,012 | 11,059 | 10,897 | 10,807 | 10,789 | 10,706 | 10,639 | 10,525 | 10,890 | 10,985 | 11,034 | 11,038 | 11,027 | 10,876 | 10,860 | 10,783 | 10,757 | 10,737 | 10,598 | 10,537 | 10,507 | 10,459 | 10,383 | 10,362 | 10,286 | 10,295 | 10,322 | 10,371 | 10,334 | 10,451 | 10,265 | 10,216 | 10,190 | 10,125 | 10,113 | 10,000 | |
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Arizona Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,544 | 12,445 | 12,259 | 12,277 | 12,411 | 12,423 | 12,397 | 12,473 | 12,180 | 11,498 | 11,581 | 11,904 | 12,067 | 12,002 | 11,918 | 12,018 | 12,057 | 11,804 | 12,068 | 11,762 | 11,708 | 11,219 | 11,315 | 11,773 | 12,018 | 11,724 | 11,906 | 11,741 | 12,090 | 12,487 | 12,522 | 12,861 | 12,846 | 12,746 | 12,777 | 12,870 | 12,904 | 12,796 | 12,777 | 12,745 | 12,654 | 12,579 | 12,761 | 12,705 | 12,640 | 12,455 | 12,492 | 12,489 | 12,543 | 12,368 | 12,291 | 11,922 | 11,975 | 12,472 | 12,308 | 12,093 | 12,058 | 12,031 | 11,999 | 12,114 | 11,936 | 11,837 | 11,796 | 11,652 | 11,610 | 11,437 | 11,380 | 11,294 | 11,170 | 11,051 | 11,110 | 11,181 | 11,157 | 11,140 | 11,123 | 11,007 | 11,047 | 11,002 | 11,038 | 11,172 | 11,051 | 11,125 | 11,095 | 11,163 | 11,088 | 11,012 | 11,059 | 10,897 | 10,807 | 10,789 | 10,706 | 10,639 | 10,525 | 10,890 | 10,985 | 11,034 | 11,038 | 11,027 | 10,876 | 10,860 | 10,783 | 10,757 | 10,737 | 10,598 | 10,537 | 10,507 | 10,459 | 10,383 | 10,362 | 10,286 | 10,295 | 10,322 | 10,371 | 10,334 | 10,451 | 10,265 | 10,216 | 10,190 | 10,125 | 10,113 | 10,000 | |
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Arizona Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,254,419 | 1,244,542 | 1,225,944 | 1,227,680 | 1,241,069 | 1,242,278 | 1,239,693 | 1,247,251 | 1,217,971 | 1,149,807 | 1,158,094 | 1,190,361 | 1,206,710 | 1,200,204 | 1,191,827 | 1,201,783 | 1,205,703 | 1,180,446 | 1,206,842 | 1,176,200 | 1,170,816 | 1,121,882 | 1,131,485 | 1,177,302 | 1,201,753 | 1,172,403 | 1,190,626 | 1,174,131 | 1,209,041 | 1,248,733 | 1,252,196 | 1,286,120 | 1,284,602 | 1,274,616 | 1,277,655 | 1,287,029 | 1,290,352 | 1,279,648 | 1,277,689 | 1,274,534 | 1,265,431 | 1,257,894 | 1,276,143 | 1,270,505 | 1,264,026 | 1,245,537 | 1,249,243 | 1,248,873 | 1,254,260 | 1,236,813 | 1,229,056 | 1,192,204 | 1,197,532 | 1,247,229 | 1,230,793 | 1,209,295 | 1,205,832 | 1,203,107 | 1,199,871 | 1,211,395 | 1,193,603 | 1,183,666 | 1,179,649 | 1,165,151 | 1,160,953 | 1,143,657 | 1,138,011 | 1,129,355 | 1,116,971 | 1,105,133 | 1,111,034 | 1,118,100 | 1,115,729 | 1,113,979 | 1,112,329 | 1,100,735 | 1,104,671 | 1,100,193 | 1,103,783 | 1,117,199 | 1,105,123 | 1,112,503 | 1,109,501 | 1,116,322 | 1,108,793 | 1,101,160 | 1,105,868 | 1,089,701 | 1,080,710 | 1,078,944 | 1,070,624 | 1,063,879 | 1,052,510 | 1,088,975 | 1,098,512 | 1,103,417 | 1,103,800 | 1,102,692 | 1,087,626 | 1,086,045 | 1,078,337 | 1,075,722 | 1,073,710 | 1,059,834 | 1,053,746 | 1,050,701 | 1,045,926 | 1,038,333 | 1,036,219 | 1,028,573 | 1,029,526 | 1,032,245 | 1,037,092 | 1,033,362 | 1,045,135 | 1,026,462 | 1,021,573 | 1,019,011 | 1,012,474 | 1,011,325 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Connecticut Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,505 | 12,382 | 12,206 | 12,290 | 12,429 | 12,434 | 12,416 | 12,476 | 12,234 | 11,638 | 11,681 | 11,981 | 12,098 | 12,071 | 11,970 | 12,075 | 12,134 | 11,876 | 12,110 | 11,834 | 11,785 | 11,352 | 11,406 | 11,771 | 12,002 | 11,717 | 11,828 | 11,664 | 11,926 | 12,287 | 12,325 | 12,635 | 12,623 | 12,547 | 12,591 | 12,661 | 12,703 | 12,592 | 12,574 | 12,536 | 12,467 | 12,396 | 12,563 | 12,511 | 12,469 | 12,319 | 12,342 | 12,325 | 12,357 | 12,150 | 12,031 | 11,664 | 11,823 | 12,197 | 12,076 | 11,877 | 11,845 | 11,816 | 11,779 | 11,881 | 11,734 | 11,621 | 11,564 | 11,410 | 11,360 | 11,179 | 11,108 | 11,014 | 10,892 | 10,783 | 10,826 | 10,881 | 10,860 | 10,813 | 10,799 | 10,685 | 10,704 | 10,694 | 10,719 | 10,815 | 10,747 | 10,809 | 10,772 | 10,830 | 10,739 | 10,665 | 10,748 | 10,629 | 10,535 | 10,540 | 10,474 | 10,410 | 10,314 | 10,670 | 10,792 | 10,851 | 10,853 | 10,845 | 10,692 | 10,683 | 10,614 | 10,610 | 10,601 | 10,474 | 10,404 | 10,374 | 10,338 | 10,267 | 10,242 | 10,181 | 10,192 | 10,222 | 10,266 | 10,242 | 10,345 | 10,193 | 10,157 | 10,151 | 10,095 | 10,099 | 10,000 | |
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Connecticut Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,505 | 12,382 | 12,206 | 12,290 | 12,429 | 12,434 | 12,416 | 12,476 | 12,234 | 11,638 | 11,681 | 11,981 | 12,098 | 12,071 | 11,970 | 12,075 | 12,134 | 11,876 | 12,110 | 11,834 | 11,785 | 11,352 | 11,406 | 11,771 | 12,002 | 11,717 | 11,828 | 11,664 | 11,926 | 12,287 | 12,325 | 12,635 | 12,623 | 12,547 | 12,591 | 12,661 | 12,703 | 12,592 | 12,574 | 12,536 | 12,467 | 12,396 | 12,563 | 12,511 | 12,469 | 12,319 | 12,342 | 12,325 | 12,357 | 12,150 | 12,031 | 11,664 | 11,823 | 12,197 | 12,076 | 11,877 | 11,845 | 11,816 | 11,779 | 11,881 | 11,734 | 11,621 | 11,564 | 11,410 | 11,360 | 11,179 | 11,108 | 11,014 | 10,892 | 10,783 | 10,826 | 10,881 | 10,860 | 10,813 | 10,799 | 10,685 | 10,704 | 10,694 | 10,719 | 10,815 | 10,747 | 10,809 | 10,772 | 10,830 | 10,739 | 10,665 | 10,748 | 10,629 | 10,535 | 10,540 | 10,474 | 10,410 | 10,314 | 10,670 | 10,792 | 10,851 | 10,853 | 10,845 | 10,692 | 10,683 | 10,614 | 10,610 | 10,601 | 10,474 | 10,404 | 10,374 | 10,338 | 10,267 | 10,242 | 10,181 | 10,192 | 10,222 | 10,266 | 10,242 | 10,345 | 10,193 | 10,157 | 10,151 | 10,095 | 10,099 | 10,000 | |
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Connecticut Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,250,542 | 1,238,210 | 1,220,579 | 1,229,047 | 1,242,867 | 1,243,371 | 1,241,561 | 1,247,589 | 1,223,371 | 1,163,806 | 1,168,116 | 1,198,143 | 1,209,841 | 1,207,122 | 1,196,978 | 1,207,505 | 1,213,403 | 1,187,639 | 1,210,987 | 1,183,368 | 1,178,476 | 1,135,194 | 1,140,595 | 1,177,070 | 1,200,166 | 1,171,716 | 1,182,834 | 1,166,403 | 1,192,593 | 1,228,693 | 1,232,460 | 1,263,472 | 1,262,349 | 1,254,662 | 1,259,050 | 1,266,056 | 1,270,324 | 1,259,219 | 1,257,448 | 1,253,597 | 1,246,690 | 1,239,614 | 1,256,251 | 1,251,055 | 1,246,868 | 1,231,858 | 1,234,150 | 1,232,478 | 1,235,684 | 1,215,010 | 1,203,142 | 1,166,444 | 1,182,330 | 1,219,670 | 1,207,566 | 1,187,732 | 1,184,545 | 1,181,610 | 1,177,892 | 1,188,059 | 1,173,423 | 1,162,117 | 1,156,373 | 1,141,046 | 1,135,985 | 1,117,925 | 1,110,791 | 1,101,370 | 1,089,226 | 1,078,257 | 1,082,581 | 1,088,061 | 1,086,040 | 1,081,295 | 1,079,859 | 1,068,549 | 1,070,449 | 1,069,423 | 1,071,894 | 1,081,504 | 1,074,750 | 1,080,878 | 1,077,216 | 1,082,957 | 1,073,922 | 1,066,533 | 1,074,844 | 1,062,899 | 1,053,457 | 1,053,977 | 1,047,361 | 1,041,024 | 1,031,377 | 1,066,976 | 1,079,162 | 1,085,145 | 1,085,314 | 1,084,463 | 1,069,209 | 1,068,322 | 1,061,417 | 1,061,006 | 1,060,149 | 1,047,358 | 1,040,400 | 1,037,391 | 1,033,806 | 1,026,670 | 1,024,177 | 1,018,066 | 1,019,197 | 1,022,232 | 1,026,594 | 1,024,200 | 1,034,529 | 1,019,268 | 1,015,710 | 1,015,112 | 1,009,478 | 1,009,882 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Minnesota Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,257 | 12,130 | 11,935 | 12,007 | 12,151 | 12,172 | 12,144 | 12,214 | 11,984 | 11,298 | 11,366 | 11,730 | 11,878 | 11,813 | 11,750 | 11,877 | 11,924 | 11,678 | 11,917 | 11,624 | 11,579 | 11,088 | 11,183 | 11,583 | 11,804 | 11,527 | 11,689 | 11,543 | 11,834 | 12,194 | 12,227 | 12,548 | 12,528 | 12,432 | 12,478 | 12,562 | 12,613 | 12,509 | 12,487 | 12,472 | 12,376 | 12,317 | 12,487 | 12,442 | 12,391 | 12,234 | 12,263 | 12,252 | 12,314 | 12,146 | 12,103 | 11,730 | 11,855 | 12,159 | 12,033 | 11,836 | 11,810 | 11,784 | 11,761 | 11,865 | 11,703 | 11,606 | 11,557 | 11,418 | 11,395 | 11,240 | 11,182 | 11,096 | 10,952 | 10,830 | 10,883 | 10,952 | 10,939 | 10,910 | 10,899 | 10,803 | 10,833 | 10,807 | 10,833 | 10,946 | 10,839 | 10,925 | 10,904 | 10,962 | 10,905 | 10,820 | 10,864 | 10,733 | 10,659 | 10,638 | 10,546 | 10,471 | 10,352 | 10,742 | 10,832 | 10,892 | 10,887 | 10,881 | 10,733 | 10,723 | 10,660 | 10,646 | 10,625 | 10,503 | 10,452 | 10,436 | 10,404 | 10,333 | 10,302 | 10,232 | 10,227 | 10,249 | 10,292 | 10,255 | 10,364 | 10,195 | 10,151 | 10,140 | 10,087 | 10,096 | 10,000 | |
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Minnesota Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,257 | 12,130 | 11,935 | 12,007 | 12,151 | 12,172 | 12,144 | 12,214 | 11,984 | 11,298 | 11,366 | 11,730 | 11,878 | 11,813 | 11,750 | 11,877 | 11,924 | 11,678 | 11,917 | 11,624 | 11,579 | 11,088 | 11,183 | 11,583 | 11,804 | 11,527 | 11,689 | 11,543 | 11,834 | 12,194 | 12,227 | 12,548 | 12,528 | 12,432 | 12,478 | 12,562 | 12,613 | 12,509 | 12,487 | 12,472 | 12,376 | 12,317 | 12,487 | 12,442 | 12,391 | 12,234 | 12,263 | 12,252 | 12,314 | 12,146 | 12,103 | 11,730 | 11,855 | 12,159 | 12,033 | 11,836 | 11,810 | 11,784 | 11,761 | 11,865 | 11,703 | 11,606 | 11,557 | 11,418 | 11,395 | 11,240 | 11,182 | 11,096 | 10,952 | 10,830 | 10,883 | 10,952 | 10,939 | 10,910 | 10,899 | 10,803 | 10,833 | 10,807 | 10,833 | 10,946 | 10,839 | 10,925 | 10,904 | 10,962 | 10,905 | 10,820 | 10,864 | 10,733 | 10,659 | 10,638 | 10,546 | 10,471 | 10,352 | 10,742 | 10,832 | 10,892 | 10,887 | 10,881 | 10,733 | 10,723 | 10,660 | 10,646 | 10,625 | 10,503 | 10,452 | 10,436 | 10,404 | 10,333 | 10,302 | 10,232 | 10,227 | 10,249 | 10,292 | 10,255 | 10,364 | 10,195 | 10,151 | 10,140 | 10,087 | 10,096 | 10,000 | |
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Minnesota Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,225,692 | 1,212,958 | 1,193,539 | 1,200,691 | 1,215,056 | 1,217,170 | 1,214,366 | 1,221,433 | 1,198,397 | 1,129,849 | 1,136,555 | 1,173,008 | 1,187,827 | 1,181,286 | 1,175,050 | 1,187,744 | 1,192,375 | 1,167,810 | 1,191,695 | 1,162,380 | 1,157,945 | 1,108,837 | 1,118,292 | 1,158,297 | 1,180,406 | 1,152,699 | 1,168,852 | 1,154,268 | 1,183,439 | 1,219,442 | 1,222,728 | 1,254,791 | 1,252,843 | 1,243,196 | 1,247,843 | 1,256,224 | 1,261,293 | 1,250,896 | 1,248,717 | 1,247,157 | 1,237,625 | 1,231,697 | 1,248,724 | 1,244,228 | 1,239,050 | 1,223,409 | 1,226,313 | 1,225,233 | 1,231,379 | 1,214,580 | 1,210,340 | 1,172,975 | 1,185,453 | 1,215,945 | 1,203,347 | 1,183,621 | 1,180,993 | 1,178,376 | 1,176,055 | 1,186,461 | 1,170,289 | 1,160,641 | 1,155,735 | 1,141,833 | 1,139,524 | 1,123,981 | 1,118,155 | 1,109,629 | 1,095,157 | 1,082,970 | 1,088,328 | 1,095,163 | 1,093,898 | 1,090,960 | 1,089,871 | 1,080,285 | 1,083,318 | 1,080,664 | 1,083,270 | 1,094,603 | 1,083,893 | 1,092,495 | 1,090,447 | 1,096,151 | 1,090,492 | 1,082,022 | 1,086,391 | 1,073,275 | 1,065,904 | 1,063,805 | 1,054,618 | 1,047,132 | 1,035,231 | 1,074,157 | 1,083,215 | 1,089,174 | 1,088,655 | 1,088,123 | 1,073,292 | 1,072,343 | 1,066,050 | 1,064,574 | 1,062,514 | 1,050,317 | 1,045,195 | 1,043,589 | 1,040,357 | 1,033,339 | 1,030,153 | 1,023,193 | 1,022,698 | 1,024,880 | 1,029,214 | 1,025,483 | 1,036,414 | 1,019,505 | 1,015,074 | 1,014,041 | 1,008,729 | 1,009,632 | 1,000,000 | |
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg New Jersey Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 13,691 | 13,561 | 13,357 | 13,402 | 13,563 | 13,569 | 13,544 | 13,603 | 13,286 | 12,520 | 12,633 | 12,985 | 13,159 | 13,082 | 12,952 | 13,041 | 13,074 | 12,764 | 13,048 | 12,628 | 12,606 | 12,009 | 12,112 | 12,630 | 12,908 | 12,536 | 12,723 | 12,535 | 12,920 | 13,370 | 13,451 | 13,867 | 13,833 | 13,708 | 13,789 | 13,890 | 13,929 | 13,785 | 13,715 | 13,663 | 13,517 | 13,431 | 13,640 | 13,449 | 13,270 | 12,987 | 13,035 | 13,059 | 13,047 | 12,646 | 12,312 | 12,009 | 12,286 | 13,182 | 12,995 | 12,735 | 12,681 | 12,635 | 12,620 | 12,747 | 12,519 | 12,390 | 12,328 | 12,111 | 12,064 | 11,838 | 11,765 | 11,665 | 11,509 | 11,390 | 11,479 | 11,554 | 11,517 | 11,440 | 11,409 | 11,278 | 11,304 | 11,257 | 11,288 | 11,421 | 11,302 | 11,336 | 11,298 | 11,260 | 11,089 | 10,977 | 11,014 | 10,805 | 10,749 | 10,731 | 10,630 | 10,558 | 10,487 | 10,991 | 11,136 | 11,181 | 11,112 | 11,084 | 10,846 | 10,808 | 10,695 | 10,631 | 10,641 | 10,484 | 10,343 | 10,262 | 10,191 | 10,074 | 10,177 | 10,089 | 10,083 | 10,196 | 10,304 | 10,305 | 10,464 | 10,280 | 10,206 | 10,202 | 10,150 | 10,142 | 10,000 | |
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg New Jersey Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 13,691 | 13,561 | 13,357 | 13,402 | 13,563 | 13,569 | 13,544 | 13,603 | 13,286 | 12,520 | 12,633 | 12,985 | 13,159 | 13,082 | 12,952 | 13,041 | 13,074 | 12,764 | 13,048 | 12,628 | 12,606 | 12,009 | 12,112 | 12,630 | 12,908 | 12,536 | 12,723 | 12,535 | 12,920 | 13,370 | 13,451 | 13,867 | 13,833 | 13,708 | 13,789 | 13,890 | 13,929 | 13,785 | 13,715 | 13,663 | 13,517 | 13,431 | 13,640 | 13,449 | 13,270 | 12,987 | 13,035 | 13,059 | 13,047 | 12,646 | 12,312 | 12,009 | 12,286 | 13,182 | 12,995 | 12,735 | 12,681 | 12,635 | 12,620 | 12,747 | 12,519 | 12,390 | 12,328 | 12,111 | 12,064 | 11,838 | 11,765 | 11,665 | 11,509 | 11,390 | 11,479 | 11,554 | 11,517 | 11,440 | 11,409 | 11,278 | 11,304 | 11,257 | 11,288 | 11,421 | 11,302 | 11,336 | 11,298 | 11,260 | 11,089 | 10,977 | 11,014 | 10,805 | 10,749 | 10,731 | 10,630 | 10,558 | 10,487 | 10,991 | 11,136 | 11,181 | 11,112 | 11,084 | 10,846 | 10,808 | 10,695 | 10,631 | 10,641 | 10,484 | 10,343 | 10,262 | 10,191 | 10,074 | 10,177 | 10,089 | 10,083 | 10,196 | 10,304 | 10,305 | 10,464 | 10,280 | 10,206 | 10,202 | 10,150 | 10,142 | 10,000 | |
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg New Jersey Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,369,127 | 1,356,078 | 1,335,723 | 1,340,162 | 1,356,270 | 1,356,903 | 1,354,446 | 1,360,274 | 1,328,629 | 1,251,975 | 1,263,302 | 1,298,516 | 1,315,943 | 1,308,224 | 1,295,238 | 1,304,116 | 1,307,440 | 1,276,390 | 1,304,763 | 1,262,823 | 1,260,566 | 1,200,889 | 1,211,177 | 1,262,985 | 1,290,844 | 1,253,576 | 1,272,271 | 1,253,483 | 1,292,016 | 1,336,975 | 1,345,124 | 1,386,750 | 1,383,262 | 1,370,804 | 1,378,931 | 1,388,991 | 1,392,868 | 1,378,456 | 1,371,510 | 1,366,264 | 1,351,662 | 1,343,082 | 1,364,032 | 1,344,877 | 1,326,978 | 1,298,748 | 1,303,481 | 1,305,883 | 1,304,652 | 1,264,591 | 1,231,190 | 1,200,939 | 1,228,610 | 1,318,162 | 1,299,498 | 1,273,541 | 1,268,059 | 1,263,514 | 1,261,984 | 1,274,662 | 1,251,890 | 1,239,047 | 1,232,846 | 1,211,063 | 1,206,352 | 1,183,826 | 1,176,474 | 1,166,480 | 1,150,905 | 1,139,003 | 1,147,926 | 1,155,380 | 1,151,715 | 1,144,001 | 1,140,940 | 1,127,820 | 1,130,357 | 1,125,720 | 1,128,760 | 1,142,057 | 1,130,181 | 1,133,595 | 1,129,766 | 1,125,968 | 1,108,912 | 1,097,729 | 1,101,406 | 1,080,525 | 1,074,879 | 1,073,099 | 1,063,001 | 1,055,841 | 1,048,652 | 1,099,132 | 1,113,567 | 1,118,141 | 1,111,219 | 1,108,395 | 1,084,572 | 1,080,774 | 1,069,536 | 1,063,050 | 1,064,086 | 1,048,421 | 1,034,287 | 1,026,230 | 1,019,069 | 1,007,364 | 1,017,725 | 1,008,856 | 1,008,253 | 1,019,611 | 1,030,419 | 1,030,504 | 1,046,383 | 1,028,006 | 1,020,581 | 1,020,196 | 1,014,981 | 1,014,152 | 1,000,000 | |
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Pennsylvania Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 13,022 | 12,927 | 12,730 | 12,770 | 12,927 | 12,913 | 12,884 | 12,934 | 12,622 | 11,885 | 11,999 | 12,345 | 12,558 | 12,485 | 12,342 | 12,461 | 12,487 | 12,222 | 12,494 | 12,127 | 12,096 | 11,559 | 11,666 | 12,154 | 12,416 | 12,092 | 12,298 | 12,160 | 12,510 | 12,933 | 12,979 | 13,334 | 13,320 | 13,209 | 13,256 | 13,350 | 13,403 | 13,286 | 13,237 | 13,191 | 13,081 | 12,998 | 13,219 | 13,092 | 13,026 | 12,844 | 12,885 | 12,845 | 12,891 | 12,678 | 12,572 | 12,179 | 12,385 | 12,828 | 12,650 | 12,418 | 12,371 | 12,348 | 12,322 | 12,424 | 12,211 | 12,111 | 12,062 | 11,891 | 11,838 | 11,633 | 11,564 | 11,472 | 11,315 | 11,191 | 11,270 | 11,341 | 11,301 | 11,276 | 11,262 | 11,132 | 11,169 | 11,119 | 11,163 | 11,307 | 11,183 | 11,218 | 11,181 | 11,255 | 11,164 | 11,090 | 11,103 | 10,925 | 10,843 | 10,802 | 10,730 | 10,665 | 10,530 | 10,951 | 11,066 | 11,131 | 11,118 | 11,114 | 10,937 | 10,899 | 10,822 | 10,780 | 10,766 | 10,640 | 10,563 | 10,508 | 10,475 | 10,404 | 10,375 | 10,287 | 10,299 | 10,325 | 10,377 | 10,343 | 10,460 | 10,275 | 10,221 | 10,207 | 10,136 | 10,124 | 10,000 | |
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Pennsylvania Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 13,022 | 12,927 | 12,730 | 12,770 | 12,927 | 12,913 | 12,884 | 12,934 | 12,622 | 11,885 | 11,999 | 12,345 | 12,558 | 12,485 | 12,342 | 12,461 | 12,487 | 12,222 | 12,494 | 12,127 | 12,096 | 11,559 | 11,666 | 12,154 | 12,416 | 12,092 | 12,298 | 12,160 | 12,510 | 12,933 | 12,979 | 13,334 | 13,320 | 13,209 | 13,256 | 13,350 | 13,403 | 13,286 | 13,237 | 13,191 | 13,081 | 12,998 | 13,219 | 13,092 | 13,026 | 12,844 | 12,885 | 12,845 | 12,891 | 12,678 | 12,572 | 12,179 | 12,385 | 12,828 | 12,650 | 12,418 | 12,371 | 12,348 | 12,322 | 12,424 | 12,211 | 12,111 | 12,062 | 11,891 | 11,838 | 11,633 | 11,564 | 11,472 | 11,315 | 11,191 | 11,270 | 11,341 | 11,301 | 11,276 | 11,262 | 11,132 | 11,169 | 11,119 | 11,163 | 11,307 | 11,183 | 11,218 | 11,181 | 11,255 | 11,164 | 11,090 | 11,103 | 10,925 | 10,843 | 10,802 | 10,730 | 10,665 | 10,530 | 10,951 | 11,066 | 11,131 | 11,118 | 11,114 | 10,937 | 10,899 | 10,822 | 10,780 | 10,766 | 10,640 | 10,563 | 10,508 | 10,475 | 10,404 | 10,375 | 10,287 | 10,299 | 10,325 | 10,377 | 10,343 | 10,460 | 10,275 | 10,221 | 10,207 | 10,136 | 10,124 | 10,000 | |
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Pennsylvania Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,302,214 | $ 1,292,661 | $ 1,272,957 | $ 1,276,997 | $ 1,292,674 | $ 1,291,268 | $ 1,288,350 | $ 1,293,394 | $ 1,262,217 | $ 1,188,479 | $ 1,199,864 | $ 1,234,457 | $ 1,255,763 | $ 1,248,495 | $ 1,234,214 | $ 1,246,140 | $ 1,248,662 | $ 1,222,199 | $ 1,249,412 | $ 1,212,739 | $ 1,209,585 | $ 1,155,850 | $ 1,166,623 | $ 1,215,365 | $ 1,241,644 | $ 1,209,209 | $ 1,229,795 | $ 1,215,976 | $ 1,251,045 | $ 1,293,320 | $ 1,297,913 | $ 1,333,416 | $ 1,331,989 | $ 1,320,872 | $ 1,325,570 | $ 1,335,025 | $ 1,340,339 | $ 1,328,575 | $ 1,323,669 | $ 1,319,129 | $ 1,308,105 | $ 1,299,795 | $ 1,321,863 | $ 1,309,170 | $ 1,302,579 | $ 1,284,385 | $ 1,288,490 | $ 1,284,531 | $ 1,289,113 | $ 1,267,774 | $ 1,257,193 | $ 1,217,870 | $ 1,238,537 | $ 1,282,815 | $ 1,264,993 | $ 1,241,754 | $ 1,237,058 | $ 1,234,847 | $ 1,232,214 | $ 1,242,405 | $ 1,221,061 | $ 1,211,113 | $ 1,206,152 | $ 1,189,143 | $ 1,183,759 | $ 1,163,312 | $ 1,156,394 | $ 1,147,213 | $ 1,131,504 | $ 1,119,112 | $ 1,127,006 | $ 1,134,091 | $ 1,130,094 | $ 1,127,611 | $ 1,126,228 | $ 1,113,200 | $ 1,116,908 | $ 1,111,932 | $ 1,116,299 | $ 1,130,669 | $ 1,118,333 | $ 1,121,781 | $ 1,118,058 | $ 1,125,516 | $ 1,116,389 | $ 1,108,992 | $ 1,110,321 | $ 1,092,484 | $ 1,084,315 | $ 1,080,217 | $ 1,072,985 | $ 1,066,471 | $ 1,053,049 | $ 1,095,099 | $ 1,106,599 | $ 1,113,075 | $ 1,111,771 | $ 1,111,379 | $ 1,093,723 | $ 1,089,876 | $ 1,082,165 | $ 1,077,977 | $ 1,076,612 | $ 1,063,958 | $ 1,056,321 | $ 1,050,815 | $ 1,047,466 | $ 1,040,362 | $ 1,037,452 | $ 1,028,735 | $ 1,029,895 | $ 1,032,451 | $ 1,037,658 | $ 1,034,294 | $ 1,045,977 | $ 1,027,538 | $ 1,022,088 | $ 1,020,658 | $ 1,013,643 | $ 1,012,422 | $ 1,000,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 119 Months Ended | 120 Months Ended |
| Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | |
| C000013133 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||
| Average Annual Return, Percent | 1.70% | 0.36% | 1.89% | |
| C000013135 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| Average Annual Return, Percent | 3.37% | 0.29% | 1.62% | |
| C000092720 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| C000013173 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||
| Average Annual Return, Percent | 1.30% | 0.39% | 1.81% | |
| C000013172 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| Average Annual Return, Percent | 2.89% | 0.31% | 1.55% | |
| C000063955 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| C000013114 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||
| Average Annual Return, Percent | 0.58% | 0.29% | 1.59% | |
| C000013116 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| Average Annual Return, Percent | 2.11% | 0.20% | 1.31% | |
| C000092718 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| C000100969 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||
| Average Annual Return, Percent | 1.97% | 0.44% | 2.24% | |
| C000100970 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| Average Annual Return, Percent | 3.57% | 0.36% | 1.89% | |
| C000100971 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| C000013127 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||
| Average Annual Return, Percent | 0.41% | 0.17% | 2.02% | |
| C000013129 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| Average Annual Return, Percent | 2.12% | 0.10% | 1.74% | |
| C000063948 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| C000013145 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | |||
| Average Annual Return, Percent | 1.09% | 0.24% | 1.68% | |
| C000013147 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| Average Annual Return, Percent | 2.82% | 0.15% | 1.42% | |
| C000063951 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| Without Sales Load [Member] | C000013133 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 5.15% | 1.03% | 2.22% | |
| Without Sales Load [Member] | C000013135 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.37% | 0.29% | 1.62% | |
| Without Sales Load [Member] | C000092720 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 5.36% | 1.23% | 2.43% | |
| Without Sales Load [Member] | C000013173 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.67% | 1.05% | 2.15% | |
| Without Sales Load [Member] | C000013172 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.89% | 0.31% | 1.55% | |
| Without Sales Load [Member] | C000063955 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.99% | 1.27% | 2.36% | |
| Without Sales Load [Member] | C000013114 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.95% | 0.95% | 1.92% | |
| Without Sales Load [Member] | C000013116 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.11% | 0.20% | 1.31% | |
| Without Sales Load [Member] | C000092718 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.15% | 1.15% | 2.13% | |
| Without Sales Load [Member] | C000100969 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 5.36% | 1.10% | 2.59% | |
| Without Sales Load [Member] | C000100970 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.57% | 0.36% | 1.89% | |
| Without Sales Load [Member] | C000100971 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 5.53% | 1.35% | 2.84% | |
| Without Sales Load [Member] | C000013127 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.81% | 0.84% | 2.35% | |
| Without Sales Load [Member] | C000013129 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.12% | 0.10% | 1.74% | |
| Without Sales Load [Member] | C000063948 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.01% | 1.06% | 2.56% | |
| Without Sales Load [Member] | C000013145 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.50% | 0.90% | 2.02% | |
| Without Sales Load [Member] | C000013147 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.82% | 0.15% | 1.42% | |
| Without Sales Load [Member] | C000063951 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 4.70% | 1.09% | 2.21% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.40% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||
| Average Annual Return, Percent | 3.74% | 1.18% | 2.47% | |
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Arizona Municipal Bond Index | |||
| Average Annual Return, Percent | 3.95% | 1% | 2.29% | |
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Arizona Municipal Bond Index | |||
| Average Annual Return, Percent | 3.95% | 1% | 2.29% | |
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Arizona Municipal Bond Index | |||
| Average Annual Return, Percent | 3.95% | 1% | 2.29% | |
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Connecticut Municipal Bond Index | |||
| Average Annual Return, Percent | 3.36% | 1.28% | 2.26% | |
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Connecticut Municipal Bond Index | |||
| Average Annual Return, Percent | 3.36% | 1.28% | 2.26% | |
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Connecticut Municipal Bond Index | |||
| Average Annual Return, Percent | 3.36% | 1.28% | 2.26% | |
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Minnesota Municipal Bond Index | |||
| Average Annual Return, Percent | 3.19% | 0.93% | 2.05% | |
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Minnesota Municipal Bond Index | |||
| Average Annual Return, Percent | 3.19% | 0.93% | 2.05% | |
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Minnesota Municipal Bond Index | |||
| Average Annual Return, Percent | 3.19% | 0.93% | 2.05% | |
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg New Jersey Municipal Bond Index | |||
| Average Annual Return, Percent | 4.04% | 1.80% | 3.19% | |
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg New Jersey Municipal Bond Index | |||
| Average Annual Return, Percent | 4.04% | 1.80% | 3.19% | |
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg New Jersey Municipal Bond Index | |||
| Average Annual Return, Percent | 4.04% | 1.80% | 3.19% | |
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Pennsylvania Municipal Bond Index | |||
| Average Annual Return, Percent | 3.70% | 1.29% | 2.67% | |
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Pennsylvania Municipal Bond Index | |||
| Average Annual Return, Percent | 3.70% | 1.29% | 2.67% | |
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Pennsylvania Municipal Bond Index | |||
| Average Annual Return, Percent | 3.70% | 1.29% | 2.67% |
| Shareholder Report, Holdings (Details) | Jul. 31, 2024 |
| C000013133 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000013133 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000013133 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000013133 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000013133 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.40% |
| C000013133 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.80% |
| C000013133 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013133 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000013133 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013133 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.10% |
| C000013133 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.40% |
| C000013133 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000013133 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000013133 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.10% |
| C000013133 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.20% |
| C000013133 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 24.40% |
| C000013135 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000013135 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000013135 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000013135 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000013135 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.40% |
| C000013135 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.80% |
| C000013135 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013135 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000013135 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013135 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.10% |
| C000013135 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.40% |
| C000013135 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000013135 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000013135 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.10% |
| C000013135 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.20% |
| C000013135 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 24.40% |
| C000092720 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000092720 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000092720 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000092720 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000092720 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.40% |
| C000092720 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.80% |
| C000092720 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000092720 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000092720 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000092720 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.10% |
| C000092720 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.40% |
| C000092720 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000092720 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000092720 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.10% |
| C000092720 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.20% |
| C000092720 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 24.40% |
| C000013173 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000013173 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000013173 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000013173 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.20% |
| C000013173 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.90% |
| C000013173 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000013173 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000013173 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.20% |
| C000013173 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.90% |
| C000013173 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000013173 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 27.40% |
| C000013173 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.10% |
| C000013173 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 35% |
| C000013173 | Student Loan | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000013172 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000013172 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000013172 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000013172 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.20% |
| C000013172 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.90% |
| C000013172 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000013172 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000013172 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.20% |
| C000013172 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.90% |
| C000013172 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000013172 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 27.40% |
| C000013172 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.10% |
| C000013172 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 35% |
| C000013172 | Student Loan | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000063955 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000063955 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000063955 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000063955 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.20% |
| C000063955 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.90% |
| C000063955 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000063955 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000063955 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.20% |
| C000063955 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.90% |
| C000063955 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000063955 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 27.40% |
| C000063955 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.10% |
| C000063955 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 35% |
| C000063955 | Student Loan | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000013114 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000013114 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000013114 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000013114 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.50% |
| C000013114 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 44.30% |
| C000013114 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.30% |
| C000013114 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14% |
| C000013114 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.60% |
| C000013114 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000013114 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000013114 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| C000013114 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 36.40% |
| C000013116 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000013116 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000013116 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000013116 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.50% |
| C000013116 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 44.30% |
| C000013116 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.30% |
| C000013116 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14% |
| C000013116 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.60% |
| C000013116 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000013116 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000013116 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| C000013116 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 36.40% |
| C000092718 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000092718 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000092718 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000092718 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.50% |
| C000092718 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 44.30% |
| C000092718 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.30% |
| C000092718 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14% |
| C000092718 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.60% |
| C000092718 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000092718 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000092718 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| C000092718 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 36.40% |
| C000100969 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000100969 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000100969 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000100969 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.30% |
| C000100969 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000100969 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000100969 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000100969 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000100969 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000100969 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.90% |
| C000100969 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000100969 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| C000100969 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.30% |
| C000100969 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000100969 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.80% |
| C000100969 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000100969 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.70% |
| C000100969 | Other Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000100969 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000100970 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000100970 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000100970 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000100970 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.30% |
| C000100970 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000100970 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000100970 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000100970 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000100970 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000100970 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.90% |
| C000100970 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000100970 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| C000100970 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.30% |
| C000100970 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000100970 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.80% |
| C000100970 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000100970 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.70% |
| C000100970 | Other Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000100970 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000100971 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000100971 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000100971 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000100971 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.30% |
| C000100971 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000100971 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000100971 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000100971 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000100971 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000100971 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.90% |
| C000100971 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000100971 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| C000100971 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.30% |
| C000100971 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000100971 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.80% |
| C000100971 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000100971 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.70% |
| C000100971 | Other Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000100971 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000013127 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000013127 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000013127 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000013127 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.60% |
| C000013127 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.70% |
| C000013127 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| C000013127 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.20% |
| C000013127 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.80% |
| C000013127 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000013127 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.70% |
| C000013127 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000013127 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.40% |
| C000013127 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000013127 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.50% |
| C000013127 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.50% |
| C000013129 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000013129 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000013129 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000013129 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.60% |
| C000013129 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.70% |
| C000013129 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| C000013129 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.20% |
| C000013129 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.80% |
| C000013129 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000013129 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.70% |
| C000013129 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000013129 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.40% |
| C000013129 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000013129 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.50% |
| C000013129 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.50% |
| C000063948 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000063948 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000063948 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000063948 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.60% |
| C000063948 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.70% |
| C000063948 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| C000063948 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.20% |
| C000063948 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.80% |
| C000063948 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000063948 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.70% |
| C000063948 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000063948 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.40% |
| C000063948 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000063948 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.50% |
| C000063948 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.50% |
| C000013145 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000013145 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000013145 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000013145 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| C000013145 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 55.40% |
| C000013145 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000013145 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000013145 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000013145 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000013145 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.80% |
| C000013145 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000013145 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.40% |
| C000013145 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000013145 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.90% |
| C000013145 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000013145 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.70% |
| C000013145 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000013145 | Bond Bank | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000013147 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000013147 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000013147 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000013147 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| C000013147 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 55.40% |
| C000013147 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000013147 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000013147 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000013147 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000013147 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.80% |
| C000013147 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000013147 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.40% |
| C000013147 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000013147 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.90% |
| C000013147 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000013147 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.70% |
| C000013147 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000013147 | Bond Bank | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000063951 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000063951 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000063951 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000063951 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.60% |
| C000063951 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 55.40% |
| C000063951 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000063951 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000063951 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000063951 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000063951 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.80% |
| C000063951 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000063951 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.40% |
| C000063951 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000063951 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.90% |
| C000063951 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000063951 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.70% |
| C000063951 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000063951 | Bond Bank | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
