| Form N-CSR Cover | 12 Months Ended |
| Aug. 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 | Aug. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Aug. 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 | Aug. 31, 2024 |
| C000013178 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Georgia Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | ETGAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Georgia Municipal Income Fund for the period of September 1, 2023 to August 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 $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 bonds with 22+ years remaining to maturity detracted from Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↓ Security selections and an underweight position in the transportation sector, which outperformed the Index, also weighed on Index-relative returns ↓ An overweight position in AA-rated bonds detracted from relative returns as AA-rated bonds generally underperformed lower-rated bonds during the period ↑ An overweight position in the health care sector, which outperformed the Index during the period, contributed to Index-relative returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined during the period ↑ An out-of-Index allocation to nonrated bonds helped Index-relative returns as lower-rated bonds generally outperformed higher-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-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 Georgia Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,729 $10,010 $10,002 10/14 $9,782 $10,079 $10,065 11/14 $9,756 $10,096 $10,082 12/14 $9,832 $10,147 $10,128 1/15 $9,964 $10,327 $10,294 2/15 $9,914 $10,220 $10,196 3/15 $9,931 $10,250 $10,230 4/15 $9,891 $10,196 $10,181 5/15 $9,885 $10,168 $10,161 6/15 $9,854 $10,159 $10,158 7/15 $9,916 $10,232 $10,233 8/15 $9,942 $10,252 $10,260 9/15 $10,027 $10,327 $10,330 10/15 $10,053 $10,368 $10,360 11/15 $10,115 $10,409 $10,392 12/15 $10,200 $10,482 $10,447 1/16 $10,309 $10,607 $10,562 2/16 $10,286 $10,624 $10,579 3/16 $10,347 $10,658 $10,602 4/16 $10,433 $10,736 $10,669 5/16 $10,459 $10,765 $10,685 6/16 $10,628 $10,936 $10,835 7/16 $10,594 $10,943 $10,845 8/16 $10,632 $10,958 $10,865 9/16 $10,598 $10,903 $10,811 10/16 $10,490 $10,789 $10,722 11/16 $10,130 $10,386 $10,364 12/16 $10,240 $10,508 $10,474 1/17 $10,252 $10,577 $10,538 2/17 $10,314 $10,651 $10,603 3/17 $10,327 $10,674 $10,616 4/17 $10,401 $10,751 $10,683 5/17 $10,549 $10,922 $10,835 6/17 $10,514 $10,883 $10,797 7/17 $10,563 $10,971 $10,868 8/17 $10,652 $11,054 $10,939 9/17 $10,604 $10,998 $10,879 10/17 $10,568 $11,025 $10,903 11/17 $10,520 $10,966 $10,844 12/17 $10,608 $11,081 $10,940 1/18 $10,496 $10,950 $10,825 2/18 $10,471 $10,918 $10,807 3/18 $10,521 $10,958 $10,833 4/18 $10,497 $10,919 $10,798 5/18 $10,599 $11,044 $10,904 6/18 $10,601 $11,053 $10,920 7/18 $10,626 $11,080 $10,939 8/18 $10,650 $11,108 $10,957 9/18 $10,600 $11,037 $10,891 10/18 $10,536 $10,969 $10,836 11/18 $10,651 $11,090 $10,955 12/18 $10,766 $11,223 $11,072 1/19 $10,869 $11,308 $11,154 2/19 $10,907 $11,368 $11,209 3/19 $11,048 $11,548 $11,363 4/19 $11,059 $11,591 $11,402 5/19 $11,186 $11,751 $11,554 6/19 $11,234 $11,794 $11,602 7/19 $11,309 $11,889 $11,689 8/19 $11,461 $12,077 $11,859 9/19 $11,367 $11,980 $11,747 10/19 $11,377 $12,002 $11,774 11/19 $11,387 $12,032 $11,806 12/19 $11,422 $12,068 $11,845 1/20 $11,602 $12,285 $12,049 2/20 $11,729 $12,444 $12,206 3/20 $11,394 $11,992 $11,763 4/20 $11,256 $11,842 $11,651 5/20 $11,595 $12,219 $12,014 6/20 $11,656 $12,319 $12,134 7/20 $11,822 $12,527 $12,322 8/20 $11,762 $12,468 $12,290 9/20 $11,781 $12,470 $12,309 10/20 $11,746 $12,433 $12,280 11/20 $11,899 $12,621 $12,439 12/20 $11,957 $12,697 $12,483 1/21 $12,002 $12,778 $12,545 2/21 $11,830 $12,575 $12,356 3/21 $11,887 $12,653 $12,430 4/21 $11,972 $12,759 $12,513 5/21 $12,001 $12,797 $12,535 6/21 $12,016 $12,832 $12,557 7/21 $12,098 $12,939 $12,655 8/21 $12,059 $12,891 $12,615 9/21 $11,965 $12,798 $12,532 10/21 $11,952 $12,761 $12,487 11/21 $12,035 $12,869 $12,594 12/21 $12,050 $12,890 $12,608 1/22 $11,751 $12,537 $12,285 2/22 $11,686 $12,492 $12,243 3/22 $11,372 $12,087 $11,852 4/22 $11,101 $11,753 $11,549 5/22 $11,228 $11,928 $11,695 6/22 $11,081 $11,732 $11,526 7/22 $11,320 $12,042 $11,809 8/22 $11,090 $11,778 $11,553 9/22 $10,724 $11,326 $11,103 10/22 $10,661 $11,232 $10,995 11/22 $11,086 $11,757 $11,501 12/22 $11,107 $11,791 $11,516 1/23 $11,380 $12,130 $11,845 2/23 $11,153 $11,856 $11,582 3/23 $11,359 $12,119 $11,817 4/23 $11,356 $12,091 $11,818 5/23 $11,254 $11,986 $11,704 6/23 $11,336 $12,106 $11,812 7/23 $11,362 $12,154 $11,856 8/23 $11,246 $11,979 $11,711 9/23 $10,933 $11,628 $11,378 10/23 $10,776 $11,529 $11,298 11/23 $11,446 $12,261 $11,981 12/23 $11,731 $12,546 $12,255 1/24 $11,716 $12,482 $12,184 2/24 $11,702 $12,498 $12,209 3/24 $11,702 $12,497 $12,231 4/24 $11,588 $12,343 $12,099 5/24 $11,574 $12,307 $12,073 6/24 $11,748 $12,495 $12,246 7/24 $11,836 $12,609 $12,385 8/24 $11,894 $12,708 $12,475 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 5.77% 0.74% 2.09% Class A with 3.25% Maximum Sales Charge 2.28% 0.09% 1.75% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Georgia Municipal Bond Index 6.52% 1.02% 2.23% |
| AssetsNet | $ 122,460,706 |
| Holdings Count | Holding | 96 |
| Advisory Fees Paid, Amount | $ 390,911 |
| InvestmentCompanyPortfolioTurnover | 44% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $122,460,706 # of Portfolio Holdings 96 Portfolio Turnover Rate 44% Total Advisory Fees Paid $390,911 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 1.5% Lease Rev./Cert. of Participation 3.8% Other Revenue 4.7% Housing 4.8% Industrial Development Revenue 6.0% Special Tax Revenue 7.2% Electric Utilities 7.6% Education 7.7% Transportation 9.0% Hospital 14.7% General Obligations 15.3% Water and Sewer 17.7% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013180 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Georgia Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECGAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Georgia Municipal Income Fund for the period of September 1, 2023 to August 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 $150 1.46% |
| Expenses Paid, Amount | $ 150 |
| 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 bonds with 22+ years remaining to maturity detracted from Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↓ Security selections and an underweight position in the transportation sector, which outperformed the Index, also weighed on Index-relative returns ↓ An overweight position in AA-rated bonds detracted from relative returns as AA-rated bonds generally underperformed lower-rated bonds during the period ↑ An overweight position in the health care sector, which outperformed the Index during the period, contributed to Index-relative returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined during the period ↑ An out-of-Index allocation to nonrated bonds helped Index-relative returns as lower-rated bonds generally outperformed higher-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-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 Georgia Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,059 $10,010 $10,002 10/14 $10,106 $10,079 $10,065 11/14 $10,077 $10,096 $10,082 12/14 $10,146 $10,147 $10,128 1/15 $10,269 $10,327 $10,294 2/15 $10,216 $10,220 $10,196 3/15 $10,228 $10,250 $10,230 4/15 $10,185 $10,196 $10,181 5/15 $10,175 $10,168 $10,161 6/15 $10,129 $10,159 $10,158 7/15 $10,185 $10,232 $10,233 8/15 $10,205 $10,252 $10,260 9/15 $10,282 $10,327 $10,330 10/15 $10,313 $10,368 $10,360 11/15 $10,357 $10,409 $10,392 12/15 $10,445 $10,482 $10,447 1/16 $10,555 $10,607 $10,562 2/16 $10,529 $10,624 $10,579 3/16 $10,583 $10,658 $10,602 4/16 $10,659 $10,736 $10,669 5/16 $10,668 $10,765 $10,685 6/16 $10,836 $10,936 $10,835 7/16 $10,810 $10,943 $10,845 8/16 $10,841 $10,958 $10,865 9/16 $10,792 $10,903 $10,811 10/16 $10,684 $10,789 $10,722 11/16 $10,302 $10,386 $10,364 12/16 $10,413 $10,508 $10,474 1/17 $10,419 $10,577 $10,538 2/17 $10,474 $10,651 $10,603 3/17 $10,481 $10,674 $10,616 4/17 $10,559 $10,751 $10,683 5/17 $10,694 $10,922 $10,835 6/17 $10,655 $10,883 $10,797 7/17 $10,697 $10,971 $10,868 8/17 $10,776 $11,054 $10,939 9/17 $10,714 $10,998 $10,879 10/17 $10,686 $11,025 $10,903 11/17 $10,612 $10,966 $10,844 12/17 $10,702 $11,081 $10,940 1/18 $10,591 $10,950 $10,825 2/18 $10,552 $10,918 $10,807 3/18 $10,594 $10,958 $10,833 4/18 $10,555 $10,919 $10,798 5/18 $10,658 $11,044 $10,904 6/18 $10,654 $11,053 $10,920 7/18 $10,684 $11,080 $10,939 8/18 $10,691 $11,108 $10,957 9/18 $10,638 $11,037 $10,891 10/18 $10,561 $10,969 $10,836 11/18 $10,665 $11,090 $10,955 12/18 $10,791 $11,223 $11,072 1/19 $10,870 $11,308 $11,154 2/19 $10,913 $11,368 $11,209 3/19 $11,039 $11,548 $11,363 4/19 $11,057 $11,591 $11,402 5/19 $11,170 $11,751 $11,554 6/19 $11,210 $11,794 $11,602 7/19 $11,274 $11,889 $11,689 8/19 $11,422 $12,077 $11,859 9/19 $11,328 $11,980 $11,747 10/19 $11,320 $12,002 $11,774 11/19 $11,324 $12,032 $11,806 12/19 $11,351 $12,068 $11,845 1/20 $11,524 $12,285 $12,049 2/20 $11,637 $12,444 $12,206 3/20 $11,308 $11,992 $11,763 4/20 $11,162 $11,842 $11,651 5/20 $11,495 $12,219 $12,014 6/20 $11,545 $12,319 $12,134 7/20 $11,693 $12,527 $12,322 8/20 $11,631 $12,468 $12,290 9/20 $11,643 $12,470 $12,309 10/20 $11,605 $12,433 $12,280 11/20 $11,753 $12,621 $12,439 12/20 $11,800 $12,697 $12,483 1/21 $11,834 $12,778 $12,545 2/21 $11,658 $12,575 $12,356 3/21 $11,704 $12,653 $12,430 4/21 $11,788 $12,759 $12,513 5/21 $11,797 $12,797 $12,535 6/21 $11,816 $12,832 $12,557 7/21 $11,885 $12,939 $12,655 8/21 $11,842 $12,891 $12,615 9/21 $11,750 $12,798 $12,532 10/21 $11,719 $12,761 $12,487 11/21 $11,801 $12,869 $12,594 12/21 $11,796 $12,890 $12,608 1/22 $11,491 $12,537 $12,285 2/22 $11,425 $12,492 $12,243 3/22 $11,120 $12,087 $11,852 4/22 $10,841 $11,753 $11,549 5/22 $10,964 $11,928 $11,695 6/22 $10,812 $11,732 $11,526 7/22 $11,037 $12,042 $11,809 8/22 $10,809 $11,778 $11,553 9/22 $10,444 $11,326 $11,103 10/22 $10,369 $11,232 $10,995 11/22 $10,789 $11,757 $11,501 12/22 $10,790 $11,791 $11,516 1/23 $11,057 $12,130 $11,845 2/23 $10,821 $11,856 $11,582 3/23 $11,016 $12,119 $11,817 4/23 $11,020 $12,091 $11,818 5/23 $10,910 $11,986 $11,704 6/23 $10,979 $12,106 $11,812 7/23 $10,997 $12,154 $11,856 8/23 $10,874 $11,979 $11,711 9/23 $10,573 $11,628 $11,378 10/23 $10,413 $11,529 $11,298 11/23 $11,052 $12,261 $11,981 12/23 $11,317 $12,546 $12,255 1/24 $11,298 $12,482 $12,184 2/24 $11,281 $12,498 $12,209 3/24 $11,276 $12,497 $12,231 4/24 $11,154 $12,343 $12,099 5/24 $11,136 $12,307 $12,073 6/24 $11,289 $12,495 $12,246 7/24 $11,375 $12,609 $12,385 8/24 $11,593 $12,708 $12,475 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 4.92% (0.02)% 1.49% Class C with 1% Maximum Deferred Sales Charge 3.92% (0.02)% 1.49% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Georgia Municipal Bond Index 6.52% 1.02% 2.23% |
| AssetsNet | $ 122,460,706 |
| Holdings Count | Holding | 96 |
| Advisory Fees Paid, Amount | $ 390,911 |
| InvestmentCompanyPortfolioTurnover | 44% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $122,460,706 # of Portfolio Holdings 96 Portfolio Turnover Rate 44% Total Advisory Fees Paid $390,911 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 1.5% Lease Rev./Cert. of Participation 3.8% Other Revenue 4.7% Housing 4.8% Industrial Development Revenue 6.0% Special Tax Revenue 7.2% Electric Utilities 7.6% Education 7.7% Transportation 9.0% Hospital 14.7% General Obligations 15.3% Water and Sewer 17.7% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000063956 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Georgia Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EIGAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Georgia Municipal Income Fund for the period of September 1, 2023 to August 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 $53 0.51% |
| Expenses Paid, Amount | $ 53 |
| 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 bonds with 22+ years remaining to maturity detracted from Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↓ Security selections and an underweight position in the transportation sector, which outperformed the Index, also weighed on Index-relative returns ↓ An overweight position in AA-rated bonds detracted from relative returns as AA-rated bonds generally underperformed lower-rated bonds during the period ↑ An overweight position in the health care sector, which outperformed the Index during the period, contributed to Index-relative returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined during the period ↑ An out-of-Index allocation to nonrated bonds helped Index-relative returns as lower-rated bonds generally outperformed higher-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-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 Georgia Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,005,692 $1,001,017 $1,000,177 10/14 $1,011,392 $1,007,880 $1,006,476 11/14 $1,008,914 $1,009,624 $1,008,180 12/14 $1,018,088 $1,014,718 $1,012,821 1/15 $1,030,731 $1,032,703 $1,029,380 2/15 $1,025,718 $1,022,050 $1,019,560 3/15 $1,027,690 $1,025,002 $1,022,954 4/15 $1,024,870 $1,019,624 $1,018,125 5/15 $1,024,417 $1,016,807 $1,016,104 6/15 $1,021,390 $1,015,880 $1,015,754 7/15 $1,028,033 $1,023,239 $1,023,334 8/15 $1,029,666 $1,025,248 $1,025,974 9/15 $1,038,611 $1,032,675 $1,033,024 10/15 $1,041,517 $1,036,780 $1,036,034 11/15 $1,048,115 $1,040,903 $1,039,160 12/15 $1,057,098 $1,048,216 $1,044,731 1/16 $1,069,724 $1,060,723 $1,056,217 2/16 $1,067,571 $1,062,391 $1,057,874 3/16 $1,074,096 $1,065,756 $1,060,207 4/16 $1,083,111 $1,073,593 $1,066,918 5/16 $1,084,766 $1,076,497 $1,068,544 6/16 $1,102,448 $1,093,622 $1,083,519 7/16 $1,100,356 $1,094,290 $1,084,499 8/16 $1,104,514 $1,095,766 $1,086,470 9/16 $1,099,889 $1,090,297 $1,081,102 10/16 $1,090,195 $1,078,859 $1,072,225 11/16 $1,051,828 $1,038,623 $1,036,430 12/16 $1,063,394 $1,050,816 $1,047,389 1/17 $1,066,107 $1,057,744 $1,053,766 2/17 $1,071,397 $1,065,088 $1,060,317 3/17 $1,074,229 $1,067,401 $1,061,555 4/17 $1,082,143 $1,075,146 $1,068,266 5/17 $1,096,403 $1,092,209 $1,083,533 6/17 $1,094,163 $1,088,292 $1,079,725 7/17 $1,099,489 $1,097,097 $1,086,796 8/17 $1,107,651 $1,105,446 $1,093,852 9/17 $1,102,851 $1,099,825 $1,087,902 10/17 $1,100,571 $1,102,510 $1,090,260 11/17 $1,094,459 $1,096,607 $1,084,404 12/17 $1,103,812 $1,108,068 $1,093,958 1/18 $1,093,683 $1,095,023 $1,082,518 2/18 $1,091,257 $1,091,751 $1,080,702 3/18 $1,095,418 $1,095,781 $1,083,254 4/18 $1,093,118 $1,091,870 $1,079,757 5/18 $1,103,864 $1,104,374 $1,090,436 6/18 $1,105,536 $1,105,316 $1,092,020 7/18 $1,108,326 $1,107,998 $1,093,866 8/18 $1,111,113 $1,110,844 $1,095,687 9/18 $1,104,699 $1,103,652 $1,089,146 10/18 $1,098,253 $1,096,856 $1,083,624 11/18 $1,110,466 $1,108,996 $1,095,471 12/18 $1,123,914 $1,122,274 $1,107,194 1/19 $1,133,438 $1,130,758 $1,115,441 2/19 $1,138,960 $1,136,812 $1,120,918 3/19 $1,152,429 $1,154,783 $1,136,285 4/19 $1,155,158 $1,159,123 $1,140,217 5/19 $1,168,554 $1,175,103 $1,155,365 6/19 $1,172,477 $1,179,442 $1,160,154 7/19 $1,180,477 $1,188,947 $1,168,890 8/19 $1,197,853 $1,207,701 $1,185,940 9/19 $1,188,227 $1,198,020 $1,174,713 10/19 $1,188,126 $1,200,167 $1,177,447 11/19 $1,189,391 $1,203,169 $1,180,612 12/19 $1,193,279 $1,206,842 $1,184,520 1/20 $1,212,240 $1,228,525 $1,204,853 2/20 $1,225,680 $1,244,367 $1,220,579 3/20 $1,192,298 $1,199,230 $1,176,257 4/20 $1,176,711 $1,184,180 $1,165,066 5/20 $1,213,677 $1,221,850 $1,201,434 6/20 $1,218,807 $1,231,906 $1,213,391 7/20 $1,236,366 $1,252,655 $1,232,219 8/20 $1,230,295 $1,246,777 $1,228,969 9/20 $1,232,545 $1,247,042 $1,230,853 10/20 $1,230,523 $1,243,296 $1,227,983 11/20 $1,245,333 $1,262,058 $1,243,852 12/20 $1,251,608 $1,269,746 $1,248,279 1/21 $1,256,458 $1,277,837 $1,254,512 2/21 $1,238,747 $1,257,534 $1,235,590 3/21 $1,244,858 $1,265,290 $1,242,971 4/21 $1,253,928 $1,275,903 $1,251,337 5/21 $1,257,273 $1,279,709 $1,253,505 6/21 $1,258,997 $1,283,223 $1,255,692 7/21 $1,267,821 $1,293,866 $1,265,514 8/21 $1,265,306 $1,289,118 $1,261,453 9/21 $1,255,712 $1,279,814 $1,253,173 10/21 $1,253,173 $1,276,072 $1,248,734 11/21 $1,263,517 $1,286,935 $1,259,428 12/21 $1,263,878 $1,289,012 $1,260,803 1/22 $1,232,769 $1,253,728 $1,228,455 2/22 $1,226,119 $1,249,236 $1,224,324 3/22 $1,193,506 $1,208,739 $1,185,221 4/22 $1,165,329 $1,175,306 $1,154,927 5/22 $1,178,838 $1,192,765 $1,169,501 6/22 $1,163,682 $1,173,230 $1,152,554 7/22 $1,188,899 $1,204,229 $1,180,860 8/22 $1,165,005 $1,177,836 $1,155,278 9/22 $1,126,795 $1,132,630 $1,110,341 10/22 $1,120,432 $1,123,211 $1,099,504 11/22 $1,166,584 $1,175,747 $1,150,050 12/22 $1,167,547 $1,179,113 $1,151,615 1/23 $1,197,843 $1,212,983 $1,184,520 2/23 $1,172,787 $1,185,555 $1,158,207 3/23 $1,194,597 $1,211,860 $1,181,722 4/23 $1,195,916 $1,209,092 $1,181,848 5/23 $1,183,968 $1,198,614 $1,170,427 6/23 $1,192,803 $1,210,621 $1,181,196 7/23 $1,195,712 $1,215,410 $1,185,601 8/23 $1,183,796 $1,197,913 $1,171,129 9/23 $1,151,106 $1,162,804 $1,137,786 10/23 $1,134,798 $1,152,908 $1,129,814 11/23 $1,205,357 $1,226,096 $1,198,080 12/23 $1,235,559 $1,254,593 $1,225,505 1/24 $1,234,207 $1,248,186 $1,218,391 2/24 $1,234,446 $1,249,789 $1,220,927 3/24 $1,234,673 $1,249,749 $1,223,117 4/24 $1,221,311 $1,234,271 $1,209,935 5/24 $1,221,560 $1,230,651 $1,207,314 6/24 $1,238,638 $1,249,514 $1,224,586 7/24 $1,248,090 $1,260,903 $1,238,469 8/24 $1,254,395 $1,270,847 $1,247,529 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 5.97% 0.93% 2.29% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Georgia Municipal Bond Index 6.52% 1.02% 2.23% |
| AssetsNet | $ 122,460,706 |
| Holdings Count | Holding | 96 |
| Advisory Fees Paid, Amount | $ 390,911 |
| InvestmentCompanyPortfolioTurnover | 44% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $122,460,706 # of Portfolio Holdings 96 Portfolio Turnover Rate 44% Total Advisory Fees Paid $390,911 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 1.5% Lease Rev./Cert. of Participation 3.8% Other Revenue 4.7% Housing 4.8% Industrial Development Revenue 6.0% Special Tax Revenue 7.2% Electric Utilities 7.6% Education 7.7% Transportation 9.0% Hospital 14.7% General Obligations 15.3% Water and Sewer 17.7% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013104 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Maryland Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | ETMDX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Maryland Municipal Income Fund for the period of September 1, 2023 to August 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 $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 the health care sector, which outperformed the Index during the period, contributed to Fund returns ↑ Security selections and an overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↑ An overweight position in bonds with 17+ years remaining to maturity helped returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ An out-of-Index position in variable-rate demand notes -- typically considered a defensive investment -- detracted from Index-relative returns as interest rates generally declined during the period ↓ An underweight position in the industrial development revenue sector -- the best-performing sector within the Index -- detracted from relative returns ↓ Security selections in BBB-rated bonds detracted from Fund performance versus the Index 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-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 Maryland Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,692 $10,010 $9,997 10/14 $9,752 $10,079 $10,052 11/14 $9,749 $10,096 $10,071 12/14 $9,788 $10,147 $10,101 1/15 $9,923 $10,327 $10,256 2/15 $9,855 $10,220 $10,164 3/15 $9,872 $10,250 $10,191 4/15 $9,835 $10,196 $10,143 5/15 $9,808 $10,168 $10,123 6/15 $9,804 $10,159 $10,119 7/15 $9,842 $10,232 $10,184 8/15 $9,880 $10,252 $10,207 9/15 $9,919 $10,327 $10,278 10/15 $9,957 $10,368 $10,312 11/15 $9,996 $10,409 $10,331 12/15 $10,066 $10,482 $10,383 1/16 $10,149 $10,607 $10,505 2/16 $10,142 $10,624 $10,528 3/16 $10,182 $10,658 $10,542 4/16 $10,252 $10,736 $10,602 5/16 $10,264 $10,765 $10,611 6/16 $10,377 $10,936 $10,753 7/16 $10,368 $10,943 $10,765 8/16 $10,394 $10,958 $10,781 9/16 $10,362 $10,903 $10,736 10/16 $10,296 $10,789 $10,653 11/16 $10,013 $10,386 $10,326 12/16 $10,097 $10,508 $10,423 1/17 $10,145 $10,577 $10,488 2/17 $10,195 $10,651 $10,557 3/17 $10,210 $10,674 $10,570 4/17 $10,260 $10,751 $10,645 5/17 $10,382 $10,922 $10,779 6/17 $10,351 $10,883 $10,744 7/17 $10,410 $10,971 $10,816 8/17 $10,469 $11,054 $10,880 9/17 $10,423 $10,998 $10,814 10/17 $10,423 $11,025 $10,832 11/17 $10,378 $10,966 $10,762 12/17 $10,462 $11,081 $10,863 1/18 $10,356 $10,950 $10,744 2/18 $10,332 $10,918 $10,718 3/18 $10,368 $10,958 $10,746 4/18 $10,333 $10,919 $10,705 5/18 $10,429 $11,044 $10,819 6/18 $10,431 $11,053 $10,827 7/18 $10,466 $11,080 $10,851 8/18 $10,467 $11,108 $10,867 9/18 $10,407 $11,037 $10,805 10/18 $10,346 $10,969 $10,743 11/18 $10,443 $11,090 $10,872 12/18 $10,539 $11,223 $11,007 1/19 $10,600 $11,308 $11,095 2/19 $10,649 $11,368 $11,144 3/19 $10,808 $11,548 $11,286 4/19 $10,832 $11,591 $11,313 5/19 $10,954 $11,751 $11,449 6/19 $10,990 $11,794 $11,483 7/19 $11,074 $11,889 $11,581 8/19 $11,244 $12,077 $11,741 9/19 $11,169 $11,980 $11,636 10/19 $11,165 $12,002 $11,672 11/19 $11,185 $12,032 $11,697 12/19 $11,206 $12,068 $11,733 1/20 $11,389 $12,285 $11,925 2/20 $11,535 $12,444 $12,049 3/20 $11,131 $11,992 $11,782 4/20 $10,826 $11,842 $11,680 5/20 $11,188 $12,219 $12,055 6/20 $11,299 $12,319 $12,067 7/20 $11,485 $12,527 $12,245 8/20 $11,430 $12,468 $12,174 9/20 $11,438 $12,470 $12,184 10/20 $11,406 $12,433 $12,139 11/20 $11,592 $12,621 $12,299 12/20 $11,674 $12,697 $12,335 1/21 $11,757 $12,778 $12,377 2/21 $11,583 $12,575 $12,191 3/21 $11,613 $12,653 $12,233 4/21 $11,706 $12,759 $12,331 5/21 $11,772 $12,797 $12,357 6/21 $11,800 $12,832 $12,371 7/21 $11,905 $12,939 $12,473 8/21 $11,869 $12,891 $12,426 9/21 $11,768 $12,798 $12,319 10/21 $11,744 $12,761 $12,296 11/21 $11,850 $12,869 $12,395 12/21 $11,852 $12,890 $12,411 1/22 $11,581 $12,537 $12,069 2/22 $11,533 $12,492 $12,044 3/22 $11,171 $12,087 $11,671 4/22 $10,849 $11,753 $11,373 5/22 $10,997 $11,928 $11,538 6/22 $10,795 $11,732 $11,385 7/22 $11,075 $12,042 $11,674 8/22 $10,817 $11,778 $11,427 9/22 $10,403 $11,326 $10,991 10/22 $10,330 $11,232 $10,918 11/22 $10,799 $11,757 $11,387 12/22 $10,780 $11,791 $11,428 1/23 $11,107 $12,130 $11,729 2/23 $10,838 $11,856 $11,466 3/23 $11,073 $12,119 $11,724 4/23 $11,056 $12,091 $11,690 5/23 $10,960 $11,986 $11,563 6/23 $11,052 $12,106 $11,665 7/23 $11,090 $12,154 $11,706 8/23 $10,972 $11,979 $11,539 9/23 $10,639 $11,628 $11,182 10/23 $10,492 $11,529 $11,101 11/23 $11,158 $12,261 $11,781 12/23 $11,472 $12,546 $12,036 1/24 $11,459 $12,482 $11,955 2/24 $11,461 $12,498 $11,972 3/24 $11,462 $12,497 $11,973 4/24 $11,341 $12,343 $11,819 5/24 $11,329 $12,307 $11,773 6/24 $11,510 $12,495 $11,943 7/24 $11,595 $12,609 $12,051 8/24 $11,662 $12,708 $12,157 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 6.34% 0.74% 1.89% Class A with 3.25% Maximum Sales Charge 2.92% 0.09% 1.55% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Maryland Municipal Bond Index 5.36% 0.70% 1.97% |
| AssetsNet | $ 84,537,545 |
| Holdings Count | Holding | 87 |
| Advisory Fees Paid, Amount | $ 244,106 |
| InvestmentCompanyPortfolioTurnover | 42% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $84,537,545 # of Portfolio Holdings 87 Portfolio Turnover Rate 42% Total Advisory Fees Paid $244,106 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 7.4% Senior Living/Life Care 3.5% Lease Rev./Cert. of Participation 4.7% Education 8.0% Special Tax Revenue 10.4% Transportation 11.8% Housing 15.0% Hospital 18.1% General Obligations 21.1% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013106 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Maryland Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECMDX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Maryland Municipal Income Fund for the period of September 1, 2023 to August 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 $152 1.48% |
| Expenses Paid, Amount | $ 152 |
| 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): ↓ An out-of-Index position in variable-rate demand notes -- typically considered a defensive investment -- detracted from Index-relative returns as interest rates generally declined during the period ↓ An underweight position in the industrial development revenue sector -- the best-performing sector within the Index -- detracted from relative returns ↓ Security selections in BBB-rated bonds detracted from Fund performance versus the Index during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index during the period, contributed to Fund returns ↑ Security selections and an overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↑ An overweight position in bonds with 17+ years remaining to maturity helped returns as longer-maturity bonds outperformed shorter-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 Maryland Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,013 $10,010 $9,997 10/14 $10,066 $10,079 $10,052 11/14 $10,059 $10,096 $10,071 12/14 $10,092 $10,147 $10,101 1/15 $10,226 $10,327 $10,256 2/15 $10,137 $10,220 $10,164 3/15 $10,149 $10,250 $10,191 4/15 $10,111 $10,196 $10,143 5/15 $10,071 $10,168 $10,123 6/15 $10,073 $10,159 $10,119 7/15 $10,105 $10,232 $10,184 8/15 $10,137 $10,252 $10,207 9/15 $10,159 $10,327 $10,278 10/15 $10,191 $10,368 $10,312 11/15 $10,234 $10,409 $10,331 12/15 $10,296 $10,482 $10,383 1/16 $10,380 $10,607 $10,505 2/16 $10,359 $10,624 $10,528 3/16 $10,392 $10,658 $10,542 4/16 $10,465 $10,736 $10,602 5/16 $10,463 $10,765 $10,611 6/16 $10,586 $10,936 $10,753 7/16 $10,563 $10,943 $10,765 8/16 $10,583 $10,958 $10,781 9/16 $10,538 $10,903 $10,736 10/16 $10,472 $10,789 $10,653 11/16 $10,183 $10,386 $10,326 12/16 $10,256 $10,508 $10,423 1/17 $10,297 $10,577 $10,488 2/17 $10,339 $10,651 $10,557 3/17 $10,349 $10,674 $10,570 4/17 $10,392 $10,751 $10,645 5/17 $10,511 $10,922 $10,779 6/17 $10,467 $10,883 $10,744 7/17 $10,528 $10,971 $10,816 8/17 $10,579 $11,054 $10,880 9/17 $10,531 $10,998 $10,814 10/17 $10,516 $11,025 $10,832 11/17 $10,458 $10,966 $10,762 12/17 $10,543 $11,081 $10,863 1/18 $10,440 $10,950 $10,744 2/18 $10,392 $10,918 $10,718 3/18 $10,432 $10,958 $10,746 4/18 $10,384 $10,919 $10,705 5/18 $10,479 $11,044 $10,819 6/18 $10,476 $11,053 $10,827 7/18 $10,504 $11,080 $10,851 8/18 $10,501 $11,108 $10,867 9/18 $10,430 $11,037 $10,805 10/18 $10,358 $10,969 $10,743 11/18 $10,454 $11,090 $10,872 12/18 $10,548 $11,223 $11,007 1/19 $10,599 $11,308 $11,095 2/19 $10,640 $11,368 $11,144 3/19 $10,792 $11,548 $11,286 4/19 $10,810 $11,591 $11,313 5/19 $10,928 $11,751 $11,449 6/19 $10,956 $11,794 $11,483 7/19 $11,038 $11,889 $11,581 8/19 $11,189 $12,077 $11,741 9/19 $11,115 $11,980 $11,636 10/19 $11,106 $12,002 $11,672 11/19 $11,108 $12,032 $11,697 12/19 $11,121 $12,068 $11,733 1/20 $11,294 $12,285 $11,925 2/20 $11,444 $12,444 $12,049 3/20 $11,026 $11,992 $11,782 4/20 $10,722 $11,842 $11,680 5/20 $11,068 $12,219 $12,055 6/20 $11,176 $12,319 $12,067 7/20 $11,350 $12,527 $12,245 8/20 $11,294 $12,468 $12,174 9/20 $11,296 $12,470 $12,184 10/20 $11,262 $12,433 $12,139 11/20 $11,424 $12,621 $12,299 12/20 $11,505 $12,697 $12,335 1/21 $11,573 $12,778 $12,377 2/21 $11,400 $12,575 $12,191 3/21 $11,421 $12,653 $12,233 4/21 $11,511 $12,759 $12,331 5/21 $11,564 $12,797 $12,357 6/21 $11,595 $12,832 $12,371 7/21 $11,684 $12,939 $12,473 8/21 $11,633 $12,891 $12,426 9/21 $11,537 $12,798 $12,319 10/21 $11,509 $12,761 $12,296 11/21 $11,599 $12,869 $12,395 12/21 $11,594 $12,890 $12,411 1/22 $11,322 $12,537 $12,069 2/22 $11,262 $12,492 $12,044 3/22 $10,909 $12,087 $11,671 4/22 $10,592 $11,753 $11,373 5/22 $10,719 $11,928 $11,538 6/22 $10,510 $11,732 $11,385 7/22 $10,790 $12,042 $11,674 8/22 $10,531 $11,778 $11,427 9/22 $10,110 $11,326 $10,991 10/22 $10,040 $11,232 $10,918 11/22 $10,501 $11,757 $11,387 12/22 $10,467 $11,791 $11,428 1/23 $10,776 $12,130 $11,729 2/23 $10,509 $11,856 $11,466 3/23 $10,724 $12,119 $11,724 4/23 $10,705 $12,091 $11,690 5/23 $10,614 $11,986 $11,563 6/23 $10,692 $12,106 $11,665 7/23 $10,708 $12,154 $11,706 8/23 $10,599 $11,979 $11,539 9/23 $10,277 $11,628 $11,182 10/23 $10,119 $11,529 $11,101 11/23 $10,763 $12,261 $11,781 12/23 $11,048 $12,546 $12,036 1/24 $11,045 $12,482 $11,955 2/24 $11,030 $12,498 $11,972 3/24 $11,026 $12,497 $11,973 4/24 $10,890 $12,343 $11,819 5/24 $10,875 $12,307 $11,773 6/24 $11,043 $12,495 $11,943 7/24 $11,125 $12,609 $12,051 8/24 $11,358 $12,708 $12,157 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 5.51% (0.01)% 1.28% Class C with 1% Maximum Deferred Sales Charge 4.51% (0.01)% 1.28% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Maryland Municipal Bond Index 5.36% 0.70% 1.97% |
| AssetsNet | $ 84,537,545 |
| Holdings Count | Holding | 87 |
| Advisory Fees Paid, Amount | $ 244,106 |
| InvestmentCompanyPortfolioTurnover | 42% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $84,537,545 # of Portfolio Holdings 87 Portfolio Turnover Rate 42% Total Advisory Fees Paid $244,106 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 7.4% Senior Living/Life Care 3.5% Lease Rev./Cert. of Participation 4.7% Education 8.0% Special Tax Revenue 10.4% Transportation 11.8% Housing 15.0% Hospital 18.1% General Obligations 21.1% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000063947 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Maryland Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EIMDX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Maryland Municipal Income Fund for the period of September 1, 2023 to August 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 $55 0.53% |
| Expenses Paid, Amount | $ 55 |
| 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 the health care sector, which outperformed the Index during the period, contributed to Fund returns ↑ Security selections and an overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↑ An overweight position in bonds with 17+ years remaining to maturity helped returns as longer-maturity bonds outperformed shorter-maturity bonds ↓ An out-of-Index position in variable-rate demand notes -- typically considered a defensive investment -- detracted from Index-relative returns as interest rates generally declined during the period ↓ An underweight position in the industrial development revenue sector -- the best-performing sector within the Index -- detracted from relative returns ↓ Security selections in BBB-rated bonds detracted from Fund performance versus the Index 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-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 Maryland Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,001,960 $1,001,017 $999,750 10/14 $1,008,317 $1,007,880 $1,005,167 11/14 $1,008,132 $1,009,624 $1,007,082 12/14 $1,012,356 $1,014,718 $1,010,089 1/15 $1,026,509 $1,032,703 $1,025,621 2/15 $1,019,574 $1,022,050 $1,016,394 3/15 $1,021,537 $1,025,002 $1,019,060 4/15 $1,017,928 $1,019,624 $1,014,310 5/15 $1,015,332 $1,016,807 $1,012,322 6/15 $1,015,015 $1,015,880 $1,011,910 7/15 $1,019,152 $1,023,239 $1,018,363 8/15 $1,023,240 $1,025,248 $1,020,687 9/15 $1,027,442 $1,032,675 $1,027,782 10/15 $1,031,580 $1,036,780 $1,031,223 11/15 $1,035,754 $1,040,903 $1,033,129 12/15 $1,043,191 $1,048,216 $1,038,261 1/16 $1,051,934 $1,060,723 $1,050,504 2/16 $1,051,436 $1,062,391 $1,052,819 3/16 $1,055,665 $1,065,756 $1,054,153 4/16 $1,063,141 $1,073,593 $1,060,163 5/16 $1,064,521 $1,076,497 $1,061,077 6/16 $1,076,409 $1,093,622 $1,075,323 7/16 $1,075,694 $1,094,290 $1,076,508 8/16 $1,078,552 $1,095,766 $1,078,096 9/16 $1,075,430 $1,090,297 $1,073,649 10/16 $1,068,768 $1,078,859 $1,065,334 11/16 $1,039,697 $1,038,623 $1,032,639 12/16 $1,048,486 $1,050,816 $1,042,299 1/17 $1,053,732 $1,057,744 $1,048,775 2/17 $1,059,059 $1,065,088 $1,055,701 3/17 $1,060,814 $1,067,401 $1,056,978 4/17 $1,066,200 $1,075,146 $1,064,538 5/17 $1,078,948 $1,092,209 $1,077,906 6/17 $1,075,953 $1,088,292 $1,074,437 7/17 $1,082,275 $1,097,097 $1,081,562 8/17 $1,088,576 $1,105,446 $1,088,039 9/17 $1,083,988 $1,099,825 $1,081,398 10/17 $1,084,220 $1,102,510 $1,083,185 11/17 $1,079,656 $1,096,607 $1,076,192 12/17 $1,088,577 $1,108,068 $1,086,315 1/18 $1,077,793 $1,095,023 $1,074,422 2/18 $1,075,444 $1,091,751 $1,071,768 3/18 $1,079,373 $1,095,781 $1,074,591 4/18 $1,075,920 $1,091,870 $1,070,503 5/18 $1,086,100 $1,104,374 $1,081,899 6/18 $1,086,454 $1,105,316 $1,082,712 7/18 $1,090,366 $1,107,998 $1,085,099 8/18 $1,090,653 $1,110,844 $1,086,705 9/18 $1,084,586 $1,103,652 $1,080,530 10/18 $1,078,419 $1,096,856 $1,074,273 11/18 $1,087,433 $1,108,996 $1,087,181 12/18 $1,098,876 $1,122,274 $1,100,672 1/19 $1,105,362 $1,130,758 $1,109,532 2/19 $1,110,645 $1,136,812 $1,114,359 3/19 $1,127,403 $1,154,783 $1,128,613 4/19 $1,130,148 $1,159,123 $1,131,266 5/19 $1,143,032 $1,175,103 $1,144,868 6/19 $1,146,961 $1,179,442 $1,148,275 7/19 $1,155,864 $1,188,947 $1,158,116 8/19 $1,173,862 $1,207,701 $1,174,130 9/19 $1,166,196 $1,198,020 $1,163,610 10/19 $1,166,000 $1,200,167 $1,167,200 11/19 $1,166,999 $1,203,169 $1,169,719 12/19 $1,169,341 $1,206,842 $1,173,275 1/20 $1,189,890 $1,228,525 $1,192,461 2/20 $1,205,327 $1,244,367 $1,204,944 3/20 $1,163,385 $1,199,230 $1,178,216 4/20 $1,131,843 $1,184,180 $1,168,039 5/20 $1,169,777 $1,221,850 $1,205,505 6/20 $1,181,567 $1,231,906 $1,206,749 7/20 $1,201,104 $1,252,655 $1,224,500 8/20 $1,195,562 $1,246,777 $1,217,368 9/20 $1,196,589 $1,247,042 $1,218,437 10/20 $1,193,531 $1,243,296 $1,213,863 11/20 $1,211,744 $1,262,058 $1,229,946 12/20 $1,221,919 $1,269,746 $1,233,513 1/21 $1,229,399 $1,277,837 $1,237,742 2/21 $1,212,844 $1,257,534 $1,219,058 3/21 $1,216,149 $1,265,290 $1,223,275 4/21 $1,226,075 $1,275,903 $1,233,055 5/21 $1,233,223 $1,279,709 $1,235,650 6/21 $1,236,376 $1,283,223 $1,237,068 7/21 $1,247,560 $1,293,866 $1,247,288 8/21 $1,243,933 $1,289,118 $1,242,580 9/21 $1,233,603 $1,279,814 $1,231,942 10/21 $1,231,340 $1,276,072 $1,229,603 11/21 $1,242,652 $1,286,935 $1,239,475 12/21 $1,243,033 $1,289,012 $1,241,122 1/22 $1,214,909 $1,253,728 $1,206,941 2/22 $1,208,712 $1,249,236 $1,204,434 3/22 $1,172,371 $1,208,739 $1,167,085 4/22 $1,138,859 $1,175,306 $1,137,281 5/22 $1,153,222 $1,192,765 $1,153,847 6/22 $1,132,191 $1,173,230 $1,138,515 7/22 $1,163,075 $1,204,229 $1,167,404 8/22 $1,136,266 $1,177,836 $1,142,702 9/22 $1,091,682 $1,132,630 $1,099,110 10/22 $1,084,280 $1,123,211 $1,091,769 11/22 $1,135,026 $1,175,747 $1,138,677 12/22 $1,133,232 $1,179,113 $1,142,846 1/23 $1,167,625 $1,212,983 $1,172,857 2/23 $1,139,605 $1,185,555 $1,146,559 3/23 $1,163,065 $1,211,860 $1,172,428 4/23 $1,162,941 $1,209,092 $1,168,959 5/23 $1,153,001 $1,198,614 $1,156,274 6/23 $1,162,866 $1,210,621 $1,166,516 7/23 $1,165,640 $1,215,410 $1,170,627 8/23 $1,153,441 $1,197,913 $1,153,868 9/23 $1,120,106 $1,162,804 $1,118,249 10/23 $1,103,457 $1,152,908 $1,110,086 11/23 $1,175,000 $1,226,096 $1,178,064 12/23 $1,208,198 $1,254,593 $1,203,596 1/24 $1,207,098 $1,248,186 $1,195,461 2/24 $1,207,452 $1,249,789 $1,197,192 3/24 $1,207,816 $1,249,749 $1,197,292 4/24 $1,193,796 $1,234,271 $1,181,854 5/24 $1,192,747 $1,230,651 $1,177,313 6/24 $1,213,501 $1,249,514 $1,194,331 7/24 $1,222,643 $1,260,903 $1,205,085 8/24 $1,230,338 $1,270,847 $1,215,666 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 6.67% 0.94% 2.09% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Maryland Municipal Bond Index 5.36% 0.70% 1.97% |
| AssetsNet | $ 84,537,545 |
| Holdings Count | Holding | 87 |
| Advisory Fees Paid, Amount | $ 244,106 |
| InvestmentCompanyPortfolioTurnover | 42% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $84,537,545 # of Portfolio Holdings 87 Portfolio Turnover Rate 42% Total Advisory Fees Paid $244,106 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 7.4% Senior Living/Life Care 3.5% Lease Rev./Cert. of Participation 4.7% Education 8.0% Special Tax Revenue 10.4% Transportation 11.8% Housing 15.0% Hospital 18.1% General Obligations 21.1% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013120 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Missouri Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | ETMOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Missouri Municipal Income Fund for the period of September 1, 2023 to August 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 $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): ↓ An underweight position in the industrial development revenue sector -- the best-performing sector within the Index -- detracted from relative returns ↓ An overweight position in AA-rated bonds detracted from relative returns as AA-rated bonds generally underperformed lower-rated bonds during the period ↓ Security selections in zero-coupon bonds detracted from Index-relative returns during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index during the period, contributed to Fund returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↑ An out-of-Index allocation to taxable municipal bonds, which generally outperformed tax-exempt municipal bonds, contributed to 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 Missouri Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,703 $10,010 $10,001 10/14 $9,762 $10,079 $10,065 11/14 $9,761 $10,096 $10,092 12/14 $9,830 $10,147 $10,133 1/15 $9,982 $10,327 $10,314 2/15 $9,888 $10,220 $10,216 3/15 $9,918 $10,250 $10,239 4/15 $9,865 $10,196 $10,188 5/15 $9,853 $10,168 $10,185 6/15 $9,800 $10,159 $10,175 7/15 $9,861 $10,232 $10,252 8/15 $9,891 $10,252 $10,277 9/15 $9,963 $10,327 $10,352 10/15 $10,004 $10,368 $10,379 11/15 $10,045 $10,409 $10,413 12/15 $10,129 $10,482 $10,474 1/16 $10,233 $10,607 $10,601 2/16 $10,242 $10,624 $10,623 3/16 $10,283 $10,658 $10,664 4/16 $10,345 $10,736 $10,739 5/16 $10,375 $10,765 $10,765 6/16 $10,555 $10,936 $10,953 7/16 $10,553 $10,943 $10,950 8/16 $10,615 $10,958 $10,968 9/16 $10,580 $10,903 $10,907 10/16 $10,501 $10,789 $10,788 11/16 $10,184 $10,386 $10,376 12/16 $10,257 $10,508 $10,522 1/17 $10,276 $10,577 $10,590 2/17 $10,329 $10,651 $10,671 3/17 $10,348 $10,674 $10,695 4/17 $10,411 $10,751 $10,773 5/17 $10,541 $10,922 $10,938 6/17 $10,505 $10,883 $10,919 7/17 $10,558 $10,971 $10,995 8/17 $10,633 $11,054 $11,066 9/17 $10,619 $10,998 $10,999 10/17 $10,561 $11,025 $11,043 11/17 $10,500 $10,966 $10,982 12/17 $10,575 $11,081 $11,086 1/18 $10,503 $10,950 $10,957 2/18 $10,509 $10,918 $10,931 3/18 $10,549 $10,958 $10,980 4/18 $10,521 $10,919 $10,943 5/18 $10,641 $11,044 $11,058 6/18 $10,658 $11,053 $11,069 7/18 $10,698 $11,080 $11,091 8/18 $10,726 $11,108 $11,119 9/18 $10,663 $11,037 $11,046 10/18 $10,587 $10,969 $10,975 11/18 $10,686 $11,090 $11,108 12/18 $10,772 $11,223 $11,246 1/19 $10,847 $11,308 $11,335 2/19 $10,922 $11,368 $11,387 3/19 $11,067 $11,548 $11,560 4/19 $11,094 $11,591 $11,606 5/19 $11,240 $11,751 $11,746 6/19 $11,278 $11,794 $11,797 7/19 $11,355 $11,889 $11,892 8/19 $11,538 $12,077 $12,094 9/19 $11,470 $11,980 $11,998 10/19 $11,460 $12,002 $12,012 11/19 $11,475 $12,032 $12,032 12/19 $11,503 $12,068 $12,073 1/20 $11,687 $12,285 $12,291 2/20 $11,835 $12,444 $12,456 3/20 $11,537 $11,992 $11,974 4/20 $11,382 $11,842 $11,804 5/20 $11,738 $12,219 $12,223 6/20 $11,790 $12,319 $12,333 7/20 $11,950 $12,527 $12,547 8/20 $11,889 $12,468 $12,496 9/20 $11,897 $12,470 $12,498 10/20 $11,868 $12,433 $12,460 11/20 $12,049 $12,621 $12,662 12/20 $12,106 $12,697 $12,764 1/21 $12,138 $12,778 $12,831 2/21 $11,924 $12,575 $12,623 3/21 $12,005 $12,653 $12,723 4/21 $12,112 $12,759 $12,843 5/21 $12,131 $12,797 $12,887 6/21 $12,149 $12,832 $12,939 7/21 $12,256 $12,939 $13,050 8/21 $12,213 $12,891 $12,988 9/21 $12,096 $12,798 $12,899 10/21 $12,078 $12,761 $12,843 11/21 $12,173 $12,869 $12,969 12/21 $12,192 $12,890 $12,988 1/22 $11,885 $12,537 $12,670 2/22 $11,830 $12,492 $12,628 3/22 $11,509 $12,087 $12,235 4/22 $11,189 $11,753 $11,867 5/22 $11,324 $11,928 $12,027 6/22 $11,105 $11,732 $11,835 7/22 $11,383 $12,042 $12,122 8/22 $11,136 $11,778 $11,879 9/22 $10,713 $11,326 $11,320 10/22 $10,622 $11,232 $11,190 11/22 $11,110 $11,757 $11,765 12/22 $11,135 $11,791 $11,797 1/23 $11,418 $12,130 $12,189 2/23 $11,149 $11,856 $11,884 3/23 $11,372 $12,119 $12,130 4/23 $11,362 $12,091 $12,127 5/23 $11,274 $11,986 $12,026 6/23 $11,369 $12,106 $12,152 7/23 $11,399 $12,154 $12,199 8/23 $11,257 $11,979 $12,028 9/23 $10,919 $11,628 $11,577 10/23 $10,764 $11,529 $11,439 11/23 $11,404 $12,261 $12,264 12/23 $11,689 $12,546 $12,582 1/24 $11,681 $12,482 $12,504 2/24 $11,687 $12,498 $12,507 3/24 $11,693 $12,497 $12,557 4/24 $11,565 $12,343 $12,399 5/24 $11,545 $12,307 $12,375 6/24 $11,714 $12,495 $12,593 7/24 $11,803 $12,609 $12,707 8/24 $11,882 $12,708 $12,805 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 5.52% 0.58% 2.07% Class A with 3.25% Maximum Sales Charge 2.06% (0.07)% 1.74% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Missouri Municipal Bond Index 6.46% 1.15% 2.50% |
| AssetsNet | $ 83,810,816 |
| Holdings Count | Holding | 77 |
| Advisory Fees Paid, Amount | $ 288,186 |
| InvestmentCompanyPortfolioTurnover | 68% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $83,810,816 # of Portfolio Holdings 77 Portfolio Turnover Rate 68% Total Advisory Fees Paid $288,186 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 2.0% Water and Sewer 4.5% Lease Rev./Cert. of Participation 4.6% Special Tax Revenue 5.1% Senior Living/Life Care 5.5% Housing 6.3% Education 6.3% Electric Utilities 9.8% Transportation 10.5% Hospital 19.4% General Obligations 26.0% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013122 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Missouri Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECMOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Missouri Municipal Income Fund for the period of September 1, 2023 to August 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 $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): ↓ An underweight position in the industrial development revenue sector -- the best-performing sector within the Index -- detracted from relative returns ↓ An overweight position in AA-rated bonds detracted from relative returns as AA-rated bonds generally underperformed lower-rated bonds during the period ↓ Security selections in zero-coupon bonds detracted from Index-relative returns during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index during the period, contributed to Fund returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↑ An out-of-Index allocation to taxable municipal bonds, which generally outperformed tax-exempt municipal bonds, contributed to 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-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 Missouri Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,023 $10,010 $10,001 10/14 $10,084 $10,079 $10,065 11/14 $10,070 $10,096 $10,092 12/14 $10,141 $10,147 $10,133 1/15 $10,288 $10,327 $10,314 2/15 $10,179 $10,220 $10,216 3/15 $10,202 $10,250 $10,239 4/15 $10,150 $10,196 $10,188 5/15 $10,126 $10,168 $10,185 6/15 $10,074 $10,159 $10,175 7/15 $10,127 $10,232 $10,252 8/15 $10,141 $10,252 $10,277 9/15 $10,214 $10,327 $10,352 10/15 $10,249 $10,368 $10,379 11/15 $10,293 $10,409 $10,413 12/15 $10,367 $10,482 $10,474 1/16 $10,460 $10,607 $10,601 2/16 $10,465 $10,624 $10,623 3/16 $10,499 $10,658 $10,664 4/16 $10,563 $10,736 $10,739 5/16 $10,587 $10,765 $10,765 6/16 $10,760 $10,936 $10,953 7/16 $10,754 $10,943 $10,950 8/16 $10,817 $10,958 $10,968 9/16 $10,771 $10,903 $10,907 10/16 $10,674 $10,789 $10,788 11/16 $10,358 $10,386 $10,376 12/16 $10,422 $10,508 $10,522 1/17 $10,436 $10,577 $10,590 2/17 $10,481 $10,651 $10,671 3/17 $10,495 $10,674 $10,695 4/17 $10,549 $10,751 $10,773 5/17 $10,664 $10,922 $10,938 6/17 $10,628 $10,883 $10,919 7/17 $10,673 $10,971 $10,995 8/17 $10,748 $11,054 $11,066 9/17 $10,731 $10,998 $10,999 10/17 $10,653 $11,025 $11,043 11/17 $10,594 $10,966 $10,982 12/17 $10,659 $11,081 $11,086 1/18 $10,578 $10,950 $10,957 2/18 $10,581 $10,918 $10,931 3/18 $10,613 $10,958 $10,980 4/18 $10,584 $10,919 $10,943 5/18 $10,689 $11,044 $11,058 6/18 $10,701 $11,053 $11,069 7/18 $10,743 $11,080 $11,091 8/18 $10,755 $11,108 $11,119 9/18 $10,682 $11,037 $11,046 10/18 $10,610 $10,969 $10,975 11/18 $10,695 $11,090 $11,108 12/18 $10,780 $11,223 $11,246 1/19 $10,843 $11,308 $11,335 2/19 $10,919 $11,368 $11,387 3/19 $11,045 $11,548 $11,560 4/19 $11,066 $11,591 $11,606 5/19 $11,214 $11,751 $11,746 6/19 $11,244 $11,794 $11,797 7/19 $11,320 $11,889 $11,892 8/19 $11,481 $12,077 $12,094 9/19 $11,404 $11,980 $11,998 10/19 $11,401 $12,002 $12,012 11/19 $11,399 $12,032 $12,032 12/19 $11,420 $12,068 $12,073 1/20 $11,591 $12,285 $12,291 2/20 $11,731 $12,444 $12,456 3/20 $11,426 $11,992 $11,974 4/20 $11,272 $11,842 $11,804 5/20 $11,619 $12,219 $12,223 6/20 $11,661 $12,319 $12,333 7/20 $11,810 $12,527 $12,547 8/20 $11,750 $12,468 $12,496 9/20 $11,741 $12,470 $12,498 10/20 $11,709 $12,433 $12,460 11/20 $11,877 $12,621 $12,662 12/20 $11,933 $12,697 $12,764 1/21 $11,955 $12,778 $12,831 2/21 $11,748 $12,575 $12,623 3/21 $11,816 $12,653 $12,723 4/21 $11,905 $12,759 $12,843 5/21 $11,927 $12,797 $12,887 6/21 $11,938 $12,832 $12,939 7/21 $12,027 $12,939 $13,050 8/21 $11,972 $12,891 $12,988 9/21 $11,862 $12,798 $12,899 10/21 $11,829 $12,761 $12,843 11/21 $11,919 $12,869 $12,969 12/21 $11,920 $12,890 $12,988 1/22 $11,619 $12,537 $12,670 2/22 $11,555 $12,492 $12,628 3/22 $11,243 $12,087 $12,235 4/22 $10,921 $11,753 $11,867 5/22 $11,047 $11,928 $12,027 6/22 $10,827 $11,732 $11,835 7/22 $11,090 $12,042 $12,122 8/22 $10,845 $11,778 $11,879 9/22 $10,421 $11,326 $11,320 10/22 $10,325 $11,232 $11,190 11/22 $10,796 $11,757 $11,765 12/22 $10,814 $11,791 $11,797 1/23 $11,080 $12,130 $12,189 2/23 $10,807 $11,856 $11,884 3/23 $11,021 $12,119 $12,130 4/23 $11,008 $12,091 $12,127 5/23 $10,915 $11,986 $12,026 6/23 $10,994 $12,106 $12,152 7/23 $11,016 $12,154 $12,199 8/23 $10,876 $11,979 $12,028 9/23 $10,530 $11,628 $11,577 10/23 $10,391 $11,529 $11,439 11/23 $11,005 $12,261 $12,264 12/23 $11,260 $12,546 $12,582 1/24 $11,249 $12,482 $12,504 2/24 $11,251 $12,498 $12,507 3/24 $11,240 $12,497 $12,557 4/24 $11,114 $12,343 $12,399 5/24 $11,092 $12,307 $12,375 6/24 $11,247 $12,495 $12,593 7/24 $11,320 $12,609 $12,707 8/24 $11,568 $12,708 $12,805 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 4.76% (0.15)% 1.47% Class C with 1% Maximum Deferred Sales Charge 3.76% (0.15)% 1.47% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Missouri Municipal Bond Index 6.46% 1.15% 2.50% |
| AssetsNet | $ 83,810,816 |
| Holdings Count | Holding | 77 |
| Advisory Fees Paid, Amount | $ 288,186 |
| InvestmentCompanyPortfolioTurnover | 68% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $83,810,816 # of Portfolio Holdings 77 Portfolio Turnover Rate 68% Total Advisory Fees Paid $288,186 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 2.0% Water and Sewer 4.5% Lease Rev./Cert. of Participation 4.6% Special Tax Revenue 5.1% Senior Living/Life Care 5.5% Housing 6.3% Education 6.3% Electric Utilities 9.8% Transportation 10.5% Hospital 19.4% General Obligations 26.0% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000092719 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Missouri Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EIMOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Missouri Municipal Income Fund for the period of September 1, 2023 to August 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): ↓ An underweight position in the industrial development revenue sector -- the best-performing sector within the Index -- detracted from relative returns ↓ An overweight position in AA-rated bonds detracted from relative returns as AA-rated bonds generally underperformed lower-rated bonds during the period ↓ Security selections in zero-coupon bonds detracted from Index-relative returns during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index during the period, contributed to Fund returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↑ An out-of-Index allocation to taxable municipal bonds, which generally outperformed tax-exempt municipal bonds, contributed to 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 Missouri Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,004,139 $1,001,017 $1,000,060 10/14 $1,010,409 $1,007,880 $1,006,532 11/14 $1,009,407 $1,009,624 $1,009,167 12/14 $1,017,805 $1,014,718 $1,013,261 1/15 $1,033,628 $1,032,703 $1,031,424 2/15 $1,023,067 $1,022,050 $1,021,588 3/15 $1,026,262 $1,025,002 $1,023,894 4/15 $1,022,047 $1,019,624 $1,018,790 5/15 $1,019,963 $1,016,807 $1,018,469 6/15 $1,015,755 $1,015,880 $1,017,529 7/15 $1,022,238 $1,023,239 $1,025,220 8/15 $1,024,449 $1,025,248 $1,027,744 9/15 $1,032,047 $1,032,675 $1,035,192 10/15 $1,036,460 $1,036,780 $1,037,912 11/15 $1,041,983 $1,040,903 $1,041,262 12/15 $1,049,689 $1,048,216 $1,047,366 1/16 $1,060,696 $1,060,723 $1,060,150 2/16 $1,061,823 $1,062,391 $1,062,272 3/16 $1,066,206 $1,065,756 $1,066,367 4/16 $1,073,923 $1,073,593 $1,073,933 5/16 $1,077,238 $1,076,497 $1,076,473 6/16 $1,096,096 $1,093,622 $1,095,341 7/16 $1,094,959 $1,094,290 $1,095,030 8/16 $1,102,695 $1,095,766 $1,096,831 9/16 $1,099,238 $1,090,297 $1,090,741 10/16 $1,090,133 $1,078,859 $1,078,809 11/16 $1,058,495 $1,038,623 $1,037,588 12/16 $1,066,296 $1,050,816 $1,052,177 1/17 $1,067,378 $1,057,744 $1,058,952 2/17 $1,074,139 $1,065,088 $1,067,100 3/17 $1,076,280 $1,067,401 $1,069,526 4/17 $1,082,973 $1,075,146 $1,077,303 5/17 $1,095,512 $1,092,209 $1,093,791 6/17 $1,093,147 $1,088,292 $1,091,890 7/17 $1,097,706 $1,097,097 $1,099,542 8/17 $1,106,870 $1,105,446 $1,106,643 9/17 $1,105,567 $1,099,825 $1,099,900 10/17 $1,098,515 $1,102,510 $1,104,348 11/17 $1,093,609 $1,096,607 $1,098,215 12/17 $1,101,557 $1,108,068 $1,108,594 1/18 $1,093,056 $1,095,023 $1,095,659 2/18 $1,093,883 $1,091,751 $1,093,129 3/18 $1,098,243 $1,095,781 $1,097,958 4/18 $1,096,669 $1,091,870 $1,094,317 5/18 $1,108,173 $1,104,374 $1,105,800 6/18 $1,110,177 $1,105,316 $1,106,946 7/18 $1,114,498 $1,107,998 $1,109,131 8/18 $1,117,656 $1,110,844 $1,111,853 9/18 $1,111,213 $1,103,652 $1,104,571 10/18 $1,103,545 $1,096,856 $1,097,482 11/18 $1,113,975 $1,108,996 $1,110,789 12/18 $1,123,159 $1,122,274 $1,124,559 1/19 $1,131,122 $1,130,758 $1,133,498 2/19 $1,139,149 $1,136,812 $1,138,708 3/19 $1,154,430 $1,154,783 $1,156,024 4/19 $1,157,490 $1,159,123 $1,160,591 5/19 $1,174,063 $1,175,103 $1,174,588 6/19 $1,177,061 $1,179,442 $1,179,680 7/19 $1,186,474 $1,188,947 $1,189,165 8/19 $1,204,565 $1,207,701 $1,209,438 9/19 $1,197,596 $1,198,020 $1,199,821 10/19 $1,196,780 $1,200,167 $1,201,173 11/19 $1,198,559 $1,203,169 $1,203,183 12/19 $1,201,670 $1,206,842 $1,207,329 1/20 $1,221,067 $1,228,525 $1,229,125 2/20 $1,236,679 $1,244,367 $1,245,644 3/20 $1,205,715 $1,199,230 $1,197,374 4/20 $1,189,779 $1,184,180 $1,180,386 5/20 $1,227,084 $1,221,850 $1,222,306 6/20 $1,232,659 $1,231,906 $1,233,348 7/20 $1,249,578 $1,252,655 $1,254,666 8/20 $1,244,741 $1,246,777 $1,249,640 9/20 $1,244,474 $1,247,042 $1,249,792 10/20 $1,241,628 $1,243,296 $1,245,953 11/20 $1,260,772 $1,262,058 $1,266,155 12/20 $1,266,922 $1,269,746 $1,276,420 1/21 $1,270,480 $1,277,837 $1,283,129 2/21 $1,249,580 $1,257,534 $1,262,293 3/21 $1,257,034 $1,265,290 $1,272,306 4/21 $1,268,345 $1,275,903 $1,284,250 5/21 $1,271,861 $1,279,709 $1,288,694 6/21 $1,274,045 $1,283,223 $1,293,886 7/21 $1,284,092 $1,293,866 $1,304,955 8/21 $1,279,858 $1,289,118 $1,298,846 9/21 $1,269,061 $1,279,814 $1,289,894 10/21 $1,266,081 $1,276,072 $1,284,311 11/21 $1,277,594 $1,286,935 $1,296,925 12/21 $1,278,543 $1,289,012 $1,298,814 1/22 $1,246,533 $1,253,728 $1,266,952 2/22 $1,241,025 $1,249,236 $1,262,830 3/22 $1,207,591 $1,208,739 $1,223,457 4/22 $1,174,172 $1,175,306 $1,186,691 5/22 $1,189,891 $1,192,765 $1,202,686 6/22 $1,165,856 $1,173,230 $1,183,493 7/22 $1,196,515 $1,204,229 $1,212,220 8/22 $1,169,496 $1,177,836 $1,187,920 9/22 $1,125,214 $1,132,630 $1,132,009 10/22 $1,115,897 $1,123,211 $1,118,991 11/22 $1,168,626 $1,175,747 $1,176,452 12/22 $1,170,140 $1,179,113 $1,179,710 1/23 $1,200,008 $1,212,983 $1,218,911 2/23 $1,172,016 $1,185,555 $1,188,388 3/23 $1,195,633 $1,211,860 $1,213,016 4/23 $1,194,793 $1,209,092 $1,212,664 5/23 $1,185,750 $1,198,614 $1,202,563 6/23 $1,195,932 $1,210,621 $1,215,202 7/23 $1,199,217 $1,215,410 $1,219,878 8/23 $1,184,565 $1,197,913 $1,202,804 9/23 $1,149,211 $1,162,804 $1,157,668 10/23 $1,133,123 $1,152,908 $1,143,932 11/23 $1,202,048 $1,226,096 $1,226,425 12/23 $1,230,749 $1,254,593 $1,258,240 1/24 $1,231,530 $1,248,186 $1,250,440 2/24 $1,232,369 $1,249,789 $1,250,731 3/24 $1,231,815 $1,249,749 $1,255,658 4/24 $1,218,602 $1,234,271 $1,239,919 5/24 $1,216,693 $1,230,651 $1,237,451 6/24 $1,234,696 $1,249,514 $1,259,263 7/24 $1,244,206 $1,260,903 $1,270,689 8/24 $1,252,411 $1,270,847 $1,280,487 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 5.73% 0.78% 2.27% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Missouri Municipal Bond Index 6.46% 1.15% 2.50% |
| AssetsNet | $ 83,810,816 |
| Holdings Count | Holding | 77 |
| Advisory Fees Paid, Amount | $ 288,186 |
| InvestmentCompanyPortfolioTurnover | 68% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $83,810,816 # of Portfolio Holdings 77 Portfolio Turnover Rate 68% Total Advisory Fees Paid $288,186 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 2.0% Water and Sewer 4.5% Lease Rev./Cert. of Participation 4.6% Special Tax Revenue 5.1% Senior Living/Life Care 5.5% Housing 6.3% Education 6.3% Electric Utilities 9.8% Transportation 10.5% Hospital 19.4% General Obligations 26.0% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013136 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance North Carolina Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | ETNCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance North Carolina Municipal Income Fund for the period of September 1, 2023 to August 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-B244"><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 0.70% |
| 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): ↓ An out-of-Index position in variable-rate demand notes -- typically considered a defensive investment -- detracted from Index-relative returns as interest rates generally declined during the period ↓ Security selections in bonds with 17-22 years remaining to maturity detracted from Index-relative performance during the period ↓ Security selections in the transportation sector detracted from Index-relative returns during the period ↑ Security selections and an overweight position in bonds with 22+ years remaining to maturity contributed to Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An overweight position in bonds rated BBB and below helped relative returns as lower-rated bonds generally outperformed higher-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-B249"><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 North Carolina Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,714 $10,010 $9,999 10/14 $9,785 $10,079 $10,061 11/14 $9,782 $10,096 $10,072 12/14 $9,853 $10,147 $10,110 1/15 $10,042 $10,327 $10,271 2/15 $9,943 $10,220 $10,174 3/15 $9,993 $10,250 $10,198 4/15 $9,925 $10,196 $10,160 5/15 $9,900 $10,168 $10,142 6/15 $9,864 $10,159 $10,144 7/15 $9,947 $10,232 $10,221 8/15 $9,954 $10,252 $10,243 9/15 $10,013 $10,327 $10,308 10/15 $10,041 $10,368 $10,339 11/15 $10,081 $10,409 $10,356 12/15 $10,154 $10,482 $10,403 1/16 $10,271 $10,607 $10,511 2/16 $10,289 $10,624 $10,534 3/16 $10,329 $10,658 $10,547 4/16 $10,402 $10,736 $10,607 5/16 $10,430 $10,765 $10,621 6/16 $10,580 $10,936 $10,761 7/16 $10,574 $10,943 $10,771 8/16 $10,612 $10,958 $10,789 9/16 $10,560 $10,903 $10,739 10/16 $10,474 $10,789 $10,661 11/16 $10,138 $10,386 $10,331 12/16 $10,222 $10,508 $10,437 1/17 $10,250 $10,577 $10,502 2/17 $10,301 $10,651 $10,576 3/17 $10,329 $10,674 $10,594 4/17 $10,392 $10,751 $10,663 5/17 $10,512 $10,922 $10,796 6/17 $10,493 $10,883 $10,763 7/17 $10,532 $10,971 $10,834 8/17 $10,606 $11,054 $10,898 9/17 $10,575 $10,998 $10,823 10/17 $10,555 $11,025 $10,841 11/17 $10,489 $10,966 $10,772 12/17 $10,574 $11,081 $10,861 1/18 $10,472 $10,950 $10,769 2/18 $10,441 $10,918 $10,748 3/18 $10,456 $10,958 $10,766 4/18 $10,436 $10,919 $10,733 5/18 $10,522 $11,044 $10,835 6/18 $10,537 $11,053 $10,840 7/18 $10,564 $11,080 $10,867 8/18 $10,579 $11,108 $10,886 9/18 $10,522 $11,037 $10,824 10/18 $10,452 $10,969 $10,774 11/18 $10,552 $11,090 $10,888 12/18 $10,652 $11,223 $11,004 1/19 $10,724 $11,308 $11,093 2/19 $10,761 $11,368 $11,139 3/19 $10,882 $11,548 $11,269 4/19 $10,905 $11,591 $11,302 5/19 $11,038 $11,751 $11,428 6/19 $11,084 $11,794 $11,469 7/19 $11,156 $11,889 $11,566 8/19 $11,339 $12,077 $11,726 9/19 $11,263 $11,980 $11,623 10/19 $11,260 $12,002 $11,653 11/19 $11,271 $12,032 $11,681 12/19 $11,294 $12,068 $11,711 1/20 $11,492 $12,285 $11,901 2/20 $11,641 $12,444 $12,038 3/20 $11,265 $11,992 $11,679 4/20 $11,101 $11,842 $11,601 5/20 $11,413 $12,219 $11,989 6/20 $11,498 $12,319 $12,043 7/20 $11,671 $12,527 $12,215 8/20 $11,616 $12,468 $12,169 9/20 $11,611 $12,470 $12,187 10/20 $11,579 $12,433 $12,144 11/20 $11,750 $12,621 $12,287 12/20 $11,805 $12,697 $12,318 1/21 $11,874 $12,778 $12,378 2/21 $11,690 $12,575 $12,206 3/21 $11,734 $12,653 $12,275 4/21 $11,842 $12,759 $12,359 5/21 $11,858 $12,797 $12,378 6/21 $11,887 $12,832 $12,402 7/21 $11,980 $12,939 $12,505 8/21 $11,944 $12,891 $12,447 9/21 $11,844 $12,798 $12,355 10/21 $11,820 $12,761 $12,322 11/21 $11,901 $12,869 $12,419 12/21 $11,903 $12,890 $12,433 1/22 $11,620 $12,537 $12,106 2/22 $11,558 $12,492 $12,064 3/22 $11,262 $12,087 $11,652 4/22 $10,979 $11,753 $11,348 5/22 $11,111 $11,928 $11,496 6/22 $10,958 $11,732 $11,350 7/22 $11,209 $12,042 $11,645 8/22 $10,978 $11,778 $11,377 9/22 $10,629 $11,326 $10,920 10/22 $10,569 $11,232 $10,838 11/22 $10,956 $11,757 $11,338 12/22 $10,988 $11,791 $11,380 1/23 $11,245 $12,130 $11,706 2/23 $11,016 $11,856 $11,449 3/23 $11,210 $12,119 $11,713 4/23 $11,193 $12,091 $11,671 5/23 $11,070 $11,986 $11,548 6/23 $11,161 $12,106 $11,658 7/23 $11,171 $12,154 $11,698 8/23 $11,063 $11,979 $11,493 9/23 $10,782 $11,628 $11,144 10/23 $10,635 $11,529 $11,041 11/23 $11,256 $12,261 $11,749 12/23 $11,527 $12,546 $12,018 1/24 $11,515 $12,482 $11,937 2/24 $11,517 $12,498 $11,953 3/24 $11,519 $12,497 $11,966 4/24 $11,412 $12,343 $11,811 5/24 $11,400 $12,307 $11,762 6/24 $11,567 $12,495 $11,936 7/24 $11,666 $12,609 $12,059 8/24 $11,722 $12,708 $12,157 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 5.98% 0.67% 1.94% Class A with 3.25% Maximum Sales Charge 2.50% 0.00% 1.60% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg North Carolina Municipal Bond Index 5.78% 0.72% 1.97% |
| AssetsNet | $ 216,408,813 |
| Holdings Count | Holding | 111 |
| Advisory Fees Paid, Amount | $ 723,067 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $216,408,813 # of Portfolio Holdings 111 Portfolio Turnover Rate 70% Total Advisory Fees Paid $723,067 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.7% Senior Living/Life Care 4.3% Lease Rev./Cert. of Participation 5.3% Housing 5.6% Electric Utilities 5.9% General Obligations 8.3% Hospital 12.4% Education 12.6% Transportation 15.9% Water and Sewer 24.0% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013138 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance North Carolina Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECNCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance North Carolina Municipal Income Fund for the period of September 1, 2023 to August 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-B269"><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 1.45% |
| Expenses Paid, Amount | $ 149 |
| Expense Ratio, Percent | 1.45% |
| 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): ↓ An out-of-Index position in variable-rate demand notes -- typically considered a defensive investment -- detracted from Index-relative returns as interest rates generally declined during the period ↓ Security selections in bonds with 17-22 years remaining to maturity detracted from Index-relative performance during the period ↓ Security selections in the transportation sector detracted from Index-relative returns during the period ↑ Security selections and an overweight position in bonds with 22+ years remaining to maturity contributed to Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An overweight position in bonds rated BBB and below helped relative returns as lower-rated bonds generally outperformed higher-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-B274"><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 North Carolina Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,033 $10,010 $9,999 10/14 $10,097 $10,079 $10,061 11/14 $10,100 $10,096 $10,072 12/14 $10,165 $10,147 $10,110 1/15 $10,352 $10,327 $10,271 2/15 $10,243 $10,220 $10,174 3/15 $10,286 $10,250 $10,198 4/15 $10,217 $10,196 $10,160 5/15 $10,178 $10,168 $10,142 6/15 $10,139 $10,159 $10,144 7/15 $10,214 $10,232 $10,221 8/15 $10,216 $10,252 $10,243 9/15 $10,268 $10,327 $10,308 10/15 $10,291 $10,368 $10,339 11/15 $10,335 $10,409 $10,356 12/15 $10,400 $10,482 $10,403 1/16 $10,507 $10,607 $10,511 2/16 $10,520 $10,624 $10,534 3/16 $10,564 $10,658 $10,547 4/16 $10,628 $10,736 $10,607 5/16 $10,639 $10,765 $10,621 6/16 $10,789 $10,936 $10,761 7/16 $10,777 $10,943 $10,771 8/16 $10,808 $10,958 $10,789 9/16 $10,754 $10,903 $10,739 10/16 $10,657 $10,789 $10,661 11/16 $10,313 $10,386 $10,331 12/16 $10,388 $10,508 $10,437 1/17 $10,410 $10,577 $10,502 2/17 $10,455 $10,651 $10,576 3/17 $10,476 $10,674 $10,594 4/17 $10,531 $10,751 $10,663 5/17 $10,650 $10,922 $10,796 6/17 $10,617 $10,883 $10,763 7/17 $10,649 $10,971 $10,834 8/17 $10,724 $11,054 $10,898 9/17 $10,690 $10,998 $10,823 10/17 $10,656 $11,025 $10,841 11/17 $10,589 $10,966 $10,772 12/17 $10,664 $11,081 $10,861 1/18 $10,564 $10,950 $10,769 2/18 $10,519 $10,918 $10,748 3/18 $10,529 $10,958 $10,766 4/18 $10,494 $10,919 $10,733 5/18 $10,581 $11,044 $10,835 6/18 $10,579 $11,053 $10,840 7/18 $10,611 $11,080 $10,867 8/18 $10,620 $11,108 $10,886 9/18 $10,551 $11,037 $10,824 10/18 $10,481 $10,969 $10,774 11/18 $10,570 $11,090 $10,888 12/18 $10,657 $11,223 $11,004 1/19 $10,720 $11,308 $11,093 2/19 $10,761 $11,368 $11,139 3/19 $10,868 $11,548 $11,269 4/19 $10,885 $11,591 $11,302 5/19 $11,014 $11,751 $11,428 6/19 $11,052 $11,794 $11,469 7/19 $11,125 $11,889 $11,566 8/19 $11,288 $12,077 $11,726 9/19 $11,201 $11,980 $11,623 10/19 $11,204 $12,002 $11,653 11/19 $11,198 $12,032 $11,681 12/19 $11,225 $12,068 $11,711 1/20 $11,414 $12,285 $11,901 2/20 $11,546 $12,444 $12,038 3/20 $11,170 $11,992 $11,679 4/20 $11,003 $11,842 $11,601 5/20 $11,308 $12,219 $11,989 6/20 $11,381 $12,319 $12,043 7/20 $11,546 $12,527 $12,215 8/20 $11,478 $12,468 $12,169 9/20 $11,468 $12,470 $12,187 10/20 $11,433 $12,433 $12,144 11/20 $11,595 $12,621 $12,287 12/20 $11,640 $12,697 $12,318 1/21 $11,709 $12,778 $12,378 2/21 $11,511 $12,575 $12,206 3/21 $11,545 $12,653 $12,275 4/21 $11,638 $12,759 $12,359 5/21 $11,659 $12,797 $12,378 6/21 $11,680 $12,832 $12,402 7/21 $11,769 $12,939 $12,505 8/21 $11,719 $12,891 $12,447 9/21 $11,621 $12,798 $12,355 10/21 $11,582 $12,761 $12,322 11/21 $11,661 $12,869 $12,419 12/21 $11,656 $12,890 $12,433 1/22 $11,369 $12,537 $12,106 2/22 $11,308 $12,492 $12,064 3/22 $10,996 $12,087 $11,652 4/22 $10,722 $11,753 $11,348 5/22 $10,848 $11,928 $11,496 6/22 $10,680 $11,732 $11,350 7/22 $10,914 $12,042 $11,645 8/22 $10,698 $11,778 $11,377 9/22 $10,342 $11,326 $10,920 10/22 $10,282 $11,232 $10,838 11/22 $10,651 $11,757 $11,338 12/22 $10,674 $11,791 $11,380 1/23 $10,913 $12,130 $11,706 2/23 $10,689 $11,856 $11,449 3/23 $10,871 $12,119 $11,713 4/23 $10,850 $12,091 $11,671 5/23 $10,722 $11,986 $11,548 6/23 $10,799 $12,106 $11,658 7/23 $10,803 $12,154 $11,698 8/23 $10,701 $11,979 $11,493 9/23 $10,420 $11,628 $11,144 10/23 $10,271 $11,529 $11,041 11/23 $10,859 $12,261 $11,749 12/23 $11,110 $12,546 $12,018 1/24 $11,094 $12,482 $11,937 2/24 $11,091 $12,498 $11,953 3/24 $11,088 $12,497 $11,966 4/24 $10,975 $12,343 $11,811 5/24 $10,947 $12,307 $11,762 6/24 $11,117 $12,495 $11,936 7/24 $11,199 $12,609 $12,059 8/24 $11,426 $12,708 $12,157 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 5.10% (0.07)% 1.34% Class C with 1% Maximum Deferred Sales Charge 4.10% (0.07)% 1.34% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg North Carolina Municipal Bond Index 5.78% 0.72% 1.97% |
| AssetsNet | $ 216,408,813 |
| Holdings Count | Holding | 111 |
| Advisory Fees Paid, Amount | $ 723,067 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $216,408,813 # of Portfolio Holdings 111 Portfolio Turnover Rate 70% Total Advisory Fees Paid $723,067 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.7% Senior Living/Life Care 4.3% Lease Rev./Cert. of Participation 5.3% Housing 5.6% Electric Utilities 5.9% General Obligations 8.3% Hospital 12.4% Education 12.6% Transportation 15.9% Water and Sewer 24.0% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000063950 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance North Carolina Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EINCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance North Carolina Municipal Income Fund for the period of September 1, 2023 to August 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-B294"><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 0.50% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.50% |
| 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): ↓ An out-of-Index position in variable-rate demand notes -- typically considered a defensive investment -- detracted from Index-relative returns as interest rates generally declined during the period ↓ Security selections in bonds with 17-22 years remaining to maturity detracted from Index-relative performance during the period ↓ Security selections in the transportation sector detracted from Index-relative returns during the period ↑ Security selections and an overweight position in bonds with 22+ years remaining to maturity contributed to Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An overweight position in bonds rated BBB and below helped relative returns as lower-rated bonds generally outperformed higher-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-B299"><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 North Carolina Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,004,203 $1,001,017 $999,932 10/14 $1,011,717 $1,007,880 $1,006,061 11/14 $1,012,657 $1,009,624 $1,007,221 12/14 $1,020,205 $1,014,718 $1,010,995 1/15 $1,039,896 $1,032,703 $1,027,081 2/15 $1,029,800 $1,022,050 $1,017,396 3/15 $1,034,053 $1,025,002 $1,019,769 4/15 $1,028,333 $1,019,624 $1,016,031 5/15 $1,024,776 $1,016,807 $1,014,194 6/15 $1,022,354 $1,015,880 $1,014,379 7/15 $1,031,108 $1,023,239 $1,022,146 8/15 $1,030,833 $1,025,248 $1,024,315 9/15 $1,037,154 $1,032,675 $1,030,822 10/15 $1,041,406 $1,036,780 $1,033,913 11/15 $1,045,694 $1,040,903 $1,035,624 12/15 $1,053,441 $1,048,216 $1,040,260 1/16 $1,064,581 $1,060,723 $1,051,055 2/16 $1,066,592 $1,062,391 $1,053,366 3/16 $1,072,080 $1,065,756 $1,054,723 4/16 $1,079,800 $1,073,593 $1,060,729 5/16 $1,081,702 $1,076,497 $1,062,066 6/16 $1,097,504 $1,093,622 $1,076,119 7/16 $1,096,996 $1,094,290 $1,077,075 8/16 $1,101,098 $1,095,766 $1,078,864 9/16 $1,095,918 $1,090,297 $1,073,874 10/16 $1,087,166 $1,078,859 $1,066,124 11/16 $1,053,745 $1,038,623 $1,033,060 12/16 $1,061,440 $1,050,816 $1,043,658 1/17 $1,065,718 $1,057,744 $1,050,162 2/17 $1,070,013 $1,065,088 $1,057,555 3/17 $1,073,090 $1,067,401 $1,059,428 4/17 $1,079,750 $1,075,146 $1,066,294 5/17 $1,093,541 $1,092,209 $1,079,551 6/17 $1,090,610 $1,088,292 $1,076,270 7/17 $1,094,863 $1,097,097 $1,083,357 8/17 $1,102,690 $1,105,446 $1,089,755 9/17 $1,099,685 $1,099,825 $1,082,258 10/17 $1,097,791 $1,102,510 $1,084,095 11/17 $1,092,319 $1,096,607 $1,077,242 12/17 $1,101,406 $1,108,068 $1,086,092 1/18 $1,090,989 $1,095,023 $1,076,911 2/18 $1,086,689 $1,091,751 $1,074,795 3/18 $1,089,696 $1,095,781 $1,076,581 4/18 $1,086,480 $1,091,870 $1,073,296 5/18 $1,095,630 $1,104,374 $1,083,538 6/18 $1,097,401 $1,105,316 $1,083,990 7/18 $1,100,407 $1,107,998 $1,086,651 8/18 $1,103,392 $1,110,844 $1,088,561 9/18 $1,096,401 $1,103,652 $1,082,422 10/18 $1,090,619 $1,096,856 $1,077,411 11/18 $1,099,947 $1,108,996 $1,088,760 12/18 $1,110,475 $1,122,274 $1,100,353 1/19 $1,118,238 $1,130,758 $1,109,337 2/19 $1,123,461 $1,136,812 $1,113,930 3/19 $1,134,987 $1,154,783 $1,126,892 4/19 $1,137,612 $1,159,123 $1,130,249 5/19 $1,151,641 $1,175,103 $1,142,776 6/19 $1,156,665 $1,179,442 $1,146,932 7/19 $1,165,633 $1,188,947 $1,156,568 8/19 $1,183,598 $1,207,701 $1,172,600 9/19 $1,175,871 $1,198,020 $1,162,348 10/19 $1,177,071 $1,200,167 $1,165,299 11/19 $1,177,113 $1,203,169 $1,168,150 12/19 $1,181,043 $1,206,842 $1,171,108 1/20 $1,200,554 $1,228,525 $1,190,087 2/20 $1,216,214 $1,244,367 $1,203,771 3/20 $1,177,185 $1,199,230 $1,167,924 4/20 $1,160,316 $1,184,180 $1,160,119 5/20 $1,194,348 $1,221,850 $1,198,938 6/20 $1,202,111 $1,231,906 $1,204,310 7/20 $1,220,332 $1,252,655 $1,221,475 8/20 $1,214,840 $1,246,777 $1,216,887 9/20 $1,215,839 $1,247,042 $1,218,714 10/20 $1,212,762 $1,243,296 $1,214,435 11/20 $1,230,739 $1,262,058 $1,228,666 12/20 $1,236,762 $1,269,746 $1,231,806 1/21 $1,244,153 $1,277,837 $1,237,762 2/21 $1,223,772 $1,257,534 $1,220,600 3/21 $1,228,560 $1,265,290 $1,227,454 4/21 $1,240,065 $1,275,903 $1,235,858 5/21 $1,243,303 $1,279,709 $1,237,802 6/21 $1,245,269 $1,283,223 $1,240,221 7/21 $1,256,494 $1,293,866 $1,250,493 8/21 $1,252,971 $1,289,118 $1,244,715 9/21 $1,242,706 $1,279,814 $1,235,537 10/21 $1,239,132 $1,276,072 $1,232,176 11/21 $1,249,086 $1,286,935 $1,241,858 12/21 $1,249,520 $1,289,012 $1,243,259 1/22 $1,218,794 $1,253,728 $1,210,641 2/22 $1,213,898 $1,249,236 $1,206,409 3/22 $1,181,699 $1,208,739 $1,165,204 4/22 $1,152,262 $1,175,306 $1,134,842 5/22 $1,167,655 $1,192,765 $1,149,638 6/22 $1,150,463 $1,173,230 $1,134,969 7/22 $1,176,994 $1,204,229 $1,164,542 8/22 $1,154,297 $1,177,836 $1,137,660 9/22 $1,116,647 $1,132,630 $1,091,968 10/22 $1,110,512 $1,123,211 $1,083,756 11/22 $1,152,627 $1,175,747 $1,133,829 12/22 $1,154,836 $1,179,113 $1,137,988 1/23 $1,181,967 $1,212,983 $1,170,607 2/23 $1,158,158 $1,185,555 $1,144,927 3/23 $1,180,040 $1,211,860 $1,171,312 4/23 $1,177,072 $1,209,092 $1,167,144 5/23 $1,164,396 $1,198,614 $1,154,770 6/23 $1,174,121 $1,210,621 $1,165,765 7/23 $1,175,431 $1,215,410 $1,169,793 8/23 $1,165,657 $1,197,913 $1,149,331 9/23 $1,134,985 $1,162,804 $1,114,354 10/23 $1,119,757 $1,152,908 $1,104,078 11/23 $1,186,516 $1,226,096 $1,174,864 12/23 $1,213,849 $1,254,593 $1,201,791 1/24 $1,212,813 $1,248,186 $1,193,708 2/24 $1,213,202 $1,249,789 $1,195,272 3/24 $1,213,577 $1,249,749 $1,196,602 4/24 $1,202,548 $1,234,271 $1,181,127 5/24 $1,201,539 $1,230,651 $1,176,163 6/24 $1,220,756 $1,249,514 $1,193,637 7/24 $1,229,894 $1,260,903 $1,205,870 8/24 $1,236,324 $1,270,847 $1,215,746 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 6.06% 0.87% 2.14% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg North Carolina Municipal Bond Index 5.78% 0.72% 1.97% |
| AssetsNet | $ 216,408,813 |
| Holdings Count | Holding | 111 |
| Advisory Fees Paid, Amount | $ 723,067 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $216,408,813 # of Portfolio Holdings 111 Portfolio Turnover Rate 70% Total Advisory Fees Paid $723,067 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.7% Senior Living/Life Care 4.3% Lease Rev./Cert. of Participation 5.3% Housing 5.6% Electric Utilities 5.9% General Obligations 8.3% Hospital 12.4% Education 12.6% Transportation 15.9% Water and Sewer 24.0% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013142 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Oregon Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | ETORX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Oregon Municipal Income Fund for the period of September 1, 2023 to August 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-B319"><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 bonds with 22+ years remaining to maturity detracted from Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↓ Security selections and an underweight position in the industrial development revenue sector -- the best-performing sector in the Index -- hurt returns ↓ An underweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, detracted from Index-relative returns as longer-duration bonds benefited from falling interest rates during the period ↑ Security selections and an underweight position in AAA-rated bonds helped Index-relative returns as AAA bonds underperformed lower-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An out-of-Index allocation to taxable municipal bonds, which generally outperformed tax-exempt municipal bonds, contributed to 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-B324"><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 Oregon Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,717 $10,010 $10,004 10/14 $9,759 $10,079 $10,069 11/14 $9,734 $10,096 $10,108 12/14 $9,810 $10,147 $10,161 1/15 $10,030 $10,327 $10,368 2/15 $9,927 $10,220 $10,231 3/15 $9,957 $10,250 $10,259 4/15 $9,908 $10,196 $10,202 5/15 $9,893 $10,168 $10,177 6/15 $9,833 $10,159 $10,167 7/15 $9,887 $10,232 $10,254 8/15 $9,896 $10,252 $10,296 9/15 $10,008 $10,327 $10,375 10/15 $10,028 $10,368 $10,409 11/15 $10,071 $10,409 $10,437 12/15 $10,115 $10,482 $10,508 1/16 $10,240 $10,607 $10,640 2/16 $10,270 $10,624 $10,652 3/16 $10,335 $10,658 $10,692 4/16 $10,424 $10,736 $10,765 5/16 $10,442 $10,765 $10,781 6/16 $10,625 $10,936 $10,958 7/16 $10,608 $10,943 $10,953 8/16 $10,686 $10,958 $10,958 9/16 $10,668 $10,903 $10,915 10/16 $10,579 $10,789 $10,819 11/16 $10,251 $10,386 $10,420 12/16 $10,330 $10,508 $10,561 1/17 $10,361 $10,577 $10,628 2/17 $10,417 $10,651 $10,692 3/17 $10,436 $10,674 $10,713 4/17 $10,515 $10,751 $10,789 5/17 $10,656 $10,922 $10,955 6/17 $10,614 $10,883 $10,917 7/17 $10,659 $10,971 $11,009 8/17 $10,727 $11,054 $11,079 9/17 $10,696 $10,998 $11,006 10/17 $10,592 $11,025 $11,030 11/17 $10,562 $10,966 $10,946 12/17 $10,619 $11,081 $11,077 1/18 $10,563 $10,950 $10,949 2/18 $10,558 $10,918 $10,905 3/18 $10,602 $10,958 $10,947 4/18 $10,596 $10,919 $10,905 5/18 $10,704 $11,044 $11,019 6/18 $10,711 $11,053 $11,035 7/18 $10,766 $11,080 $11,054 8/18 $10,772 $11,108 $11,082 9/18 $10,725 $11,037 $11,008 10/18 $10,666 $10,969 $10,940 11/18 $10,760 $11,090 $11,078 12/18 $10,867 $11,223 $11,221 1/19 $10,961 $11,308 $11,313 2/19 $11,015 $11,368 $11,369 3/19 $11,133 $11,548 $11,535 4/19 $11,159 $11,591 $11,571 5/19 $11,289 $11,751 $11,725 6/19 $11,327 $11,794 $11,774 7/19 $11,417 $11,889 $11,865 8/19 $11,612 $12,077 $12,061 9/19 $11,531 $11,980 $11,949 10/19 $11,529 $12,002 $11,978 11/19 $11,542 $12,032 $12,014 12/19 $11,568 $12,068 $12,043 1/20 $11,753 $12,285 $12,262 2/20 $11,899 $12,444 $12,413 3/20 $11,619 $11,992 $12,089 4/20 $11,512 $11,842 $12,011 5/20 $11,859 $12,219 $12,420 6/20 $11,925 $12,319 $12,439 7/20 $12,083 $12,527 $12,640 8/20 $12,026 $12,468 $12,568 9/20 $12,020 $12,470 $12,571 10/20 $11,987 $12,433 $12,537 11/20 $12,157 $12,621 $12,716 12/20 $12,215 $12,697 $12,768 1/21 $12,247 $12,778 $12,820 2/21 $12,034 $12,575 $12,596 3/21 $12,094 $12,653 $12,668 4/21 $12,182 $12,759 $12,768 5/21 $12,227 $12,797 $12,803 6/21 $12,245 $12,832 $12,807 7/21 $12,331 $12,939 $12,928 8/21 $12,294 $12,891 $12,890 9/21 $12,203 $12,798 $12,771 10/21 $12,193 $12,761 $12,739 11/21 $12,280 $12,869 $12,846 12/21 $12,284 $12,890 $12,878 1/22 $11,984 $12,537 $12,503 2/22 $11,934 $12,492 $12,467 3/22 $11,578 $12,087 $12,047 4/22 $11,265 $11,753 $11,677 5/22 $11,383 $11,928 $11,864 6/22 $11,209 $11,732 $11,658 7/22 $11,453 $12,042 $11,978 8/22 $11,207 $11,778 $11,703 9/22 $10,836 $11,326 $11,244 10/22 $10,762 $11,232 $11,159 11/22 $11,241 $11,757 $11,667 12/22 $11,242 $11,791 $11,726 1/23 $11,540 $12,130 $12,042 2/23 $11,272 $11,856 $11,770 3/23 $11,516 $12,119 $12,039 4/23 $11,488 $12,091 $12,020 5/23 $11,361 $11,986 $11,897 6/23 $11,463 $12,106 $12,010 7/23 $11,493 $12,154 $12,043 8/23 $11,322 $11,979 $11,822 9/23 $11,036 $11,628 $11,416 10/23 $10,894 $11,529 $11,316 11/23 $11,523 $12,261 $12,105 12/23 $11,803 $12,546 $12,404 1/24 $11,777 $12,482 $12,328 2/24 $11,794 $12,498 $12,338 3/24 $11,783 $12,497 $12,342 4/24 $11,683 $12,343 $12,150 5/24 $11,687 $12,307 $12,125 6/24 $11,839 $12,495 $12,307 7/24 $11,947 $12,609 $12,423 8/24 $12,015 $12,708 $12,529 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 6.08% 0.68% 2.18% Class A with 3.25% Maximum Sales Charge 2.67% 0.01% 1.85% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Oregon Municipal Bond Index 5.98% 0.76% 2.28% |
| AssetsNet | $ 194,540,469 |
| Holdings Count | Holding | 119 |
| Advisory Fees Paid, Amount | $ 611,051 |
| InvestmentCompanyPortfolioTurnover | 47% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $194,540,469 # of Portfolio Holdings 119 Portfolio Turnover Rate 47% Total Advisory Fees Paid $611,051 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.6% Electric Utilities 4.1% Housing 4.4% Special Tax Revenue 4.8% Transportation 5.2% Water and Sewer 8.2% Education 8.8% Hospital 15.3% General Obligations 43.6% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013144 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Oregon Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECORX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Oregon Municipal Income Fund for the period of September 1, 2023 to August 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-B344"><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 1.47% |
| Expenses Paid, Amount | $ 151 |
| 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 and an underweight position in bonds with 22+ years remaining to maturity detracted from Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↓ Security selections and an underweight position in the industrial development revenue sector -- the best-performing sector in the Index -- hurt returns ↓ An underweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, detracted from Index-relative returns as longer-duration bonds benefited from falling interest rates during the period ↑ Security selections and an underweight position in AAA-rated bonds helped Index-relative returns as AAA bonds underperformed lower-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An out-of-Index allocation to taxable municipal bonds, which generally outperformed tax-exempt municipal bonds, contributed to 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-B349"><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 Oregon Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,036 $10,010 $10,004 10/14 $10,072 $10,079 $10,069 11/14 $10,045 $10,096 $10,108 12/14 $10,123 $10,147 $10,161 1/15 $10,338 $10,327 $10,368 2/15 $10,227 $10,220 $10,231 3/15 $10,252 $10,250 $10,259 4/15 $10,191 $10,196 $10,202 5/15 $10,174 $10,168 $10,177 6/15 $10,103 $10,159 $10,167 7/15 $10,161 $10,232 $10,254 8/15 $10,154 $10,252 $10,296 9/15 $10,256 $10,327 $10,375 10/15 $10,282 $10,368 $10,409 11/15 $10,319 $10,409 $10,437 12/15 $10,356 $10,482 $10,508 1/16 $10,480 $10,607 $10,640 2/16 $10,505 $10,624 $10,652 3/16 $10,561 $10,658 $10,692 4/16 $10,640 $10,736 $10,765 5/16 $10,664 $10,765 $10,781 6/16 $10,841 $10,936 $10,958 7/16 $10,810 $10,943 $10,953 8/16 $10,878 $10,958 $10,958 9/16 $10,858 $10,903 $10,915 10/16 $10,771 $10,789 $10,819 11/16 $10,418 $10,386 $10,420 12/16 $10,498 $10,508 $10,561 1/17 $10,512 $10,577 $10,628 2/17 $10,572 $10,651 $10,692 3/17 $10,575 $10,674 $10,713 4/17 $10,656 $10,751 $10,789 5/17 $10,782 $10,922 $10,955 6/17 $10,739 $10,883 $10,917 7/17 $10,789 $10,971 $11,009 8/17 $10,846 $11,054 $11,079 9/17 $10,803 $10,998 $11,006 10/17 $10,691 $11,025 $11,030 11/17 $10,648 $10,966 $10,946 12/17 $10,708 $11,081 $11,077 1/18 $10,642 $10,950 $10,949 2/18 $10,633 $10,918 $10,905 3/18 $10,670 $10,958 $10,947 4/18 $10,661 $10,919 $10,905 5/18 $10,756 $11,044 $11,019 6/18 $10,758 $11,053 $11,035 7/18 $10,805 $11,080 $11,054 8/18 $10,817 $11,108 $11,082 9/18 $10,759 $11,037 $11,008 10/18 $10,689 $10,969 $10,940 11/18 $10,771 $11,090 $11,078 12/18 $10,876 $11,223 $11,221 1/19 $10,957 $11,308 $11,313 2/19 $11,003 $11,368 $11,369 3/19 $11,118 $11,548 $11,535 4/19 $11,149 $11,591 $11,571 5/19 $11,263 $11,751 $11,725 6/19 $11,304 $11,794 $11,774 7/19 $11,381 $11,889 $11,865 8/19 $11,553 $12,077 $12,061 9/19 $11,463 $11,980 $11,949 10/19 $11,456 $12,002 $11,978 11/19 $11,462 $12,032 $12,014 12/19 $11,493 $12,068 $12,043 1/20 $11,668 $12,285 $12,262 2/20 $11,807 $12,444 $12,413 3/20 $11,525 $11,992 $12,089 4/20 $11,399 $11,842 $12,011 5/20 $11,744 $12,219 $12,420 6/20 $11,798 $12,319 $12,439 7/20 $11,960 $12,527 $12,640 8/20 $11,879 $12,468 $12,568 9/20 $11,868 $12,470 $12,571 10/20 $11,832 $12,433 $12,537 11/20 $11,992 $12,621 $12,716 12/20 $12,038 $12,697 $12,768 1/21 $12,061 $12,778 $12,820 2/21 $11,852 $12,575 $12,596 3/21 $11,899 $12,653 $12,668 4/21 $11,985 $12,759 $12,768 5/21 $12,019 $12,797 $12,803 6/21 $12,030 $12,832 $12,807 7/21 $12,101 $12,939 $12,928 8/21 $12,061 $12,891 $12,890 9/21 $11,962 $12,798 $12,771 10/21 $11,935 $12,761 $12,739 11/21 $12,031 $12,869 $12,846 12/21 $12,028 $12,890 $12,878 1/22 $11,717 $12,537 $12,503 2/22 $11,655 $12,492 $12,467 3/22 $11,306 $12,087 $12,047 4/22 $10,985 $11,753 $11,677 5/22 $11,110 $11,928 $11,864 6/22 $10,925 $11,732 $11,658 7/22 $11,149 $12,042 $11,978 8/22 $10,913 $11,778 $11,703 9/22 $10,541 $11,326 $11,244 10/22 $10,470 $11,232 $11,159 11/22 $10,916 $11,757 $11,667 12/22 $10,925 $11,791 $11,726 1/23 $11,198 $12,130 $12,042 2/23 $10,932 $11,856 $11,770 3/23 $11,155 $12,119 $12,039 4/23 $11,127 $12,091 $12,020 5/23 $10,996 $11,986 $11,897 6/23 $11,082 $12,106 $12,010 7/23 $11,105 $12,154 $12,043 8/23 $10,949 $11,979 $11,822 9/23 $10,654 $11,628 $11,416 10/23 $10,525 $11,529 $11,316 11/23 $11,114 $12,261 $12,105 12/23 $11,370 $12,546 $12,404 1/24 $11,355 $12,482 $12,328 2/24 $11,353 $12,498 $12,338 3/24 $11,339 $12,497 $12,342 4/24 $11,234 $12,343 $12,150 5/24 $11,219 $12,307 $12,125 6/24 $11,375 $12,495 $12,307 7/24 $11,465 $12,609 $12,423 8/24 $11,695 $12,708 $12,529 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 5.18% (0.06)% 1.58% Class C with 1% Maximum Deferred Sales Charge 4.18% (0.06)% 1.58% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Oregon Municipal Bond Index 5.98% 0.76% 2.28% |
| AssetsNet | $ 194,540,469 |
| Holdings Count | Holding | 119 |
| Advisory Fees Paid, Amount | $ 611,051 |
| InvestmentCompanyPortfolioTurnover | 47% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $194,540,469 # of Portfolio Holdings 119 Portfolio Turnover Rate 47% Total Advisory Fees Paid $611,051 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.6% Electric Utilities 4.1% Housing 4.4% Special Tax Revenue 4.8% Transportation 5.2% Water and Sewer 8.2% Education 8.8% Hospital 15.3% General Obligations 43.6% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000092722 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Oregon Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EIORX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Oregon Municipal Income Fund for the period of September 1, 2023 to August 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-B369"><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 0.51% |
| Expenses Paid, Amount | $ 53 |
| 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 AAA-rated bonds helped Index-relative returns as AAA bonds underperformed lower-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An out-of-Index allocation to taxable municipal bonds, which generally outperformed tax-exempt municipal bonds, contributed to Index-relative returns ↓ Security selections and an underweight position in bonds with 22+ years remaining to maturity detracted from Index-relative returns as longer-maturity bonds generally outperformed shorter-maturity bonds during the period ↓ Security selections and an underweight position in the industrial development revenue sector -- the best-performing sector in the Index -- hurt returns ↓ An underweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, detracted from Index-relative returns as longer-duration bonds benefited from falling interest rates 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-B374"><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 Oregon Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,004,492 $1,001,017 $1,000,389 10/14 $1,008,975 $1,007,880 $1,006,891 11/14 $1,007,728 $1,009,624 $1,010,750 12/14 $1,014,585 $1,014,718 $1,016,077 1/15 $1,037,625 $1,032,703 $1,036,839 2/15 $1,027,026 $1,022,050 $1,023,083 3/15 $1,031,504 $1,025,002 $1,025,896 4/15 $1,025,450 $1,019,624 $1,020,180 5/15 $1,024,081 $1,016,807 $1,017,660 6/15 $1,018,014 $1,015,880 $1,016,704 7/15 $1,024,935 $1,023,239 $1,025,450 8/15 $1,024,792 $1,025,248 $1,029,623 9/15 $1,036,584 $1,032,675 $1,037,523 10/15 $1,038,848 $1,036,780 $1,040,856 11/15 $1,043,508 $1,040,903 $1,043,728 12/15 $1,048,215 $1,048,216 $1,050,797 1/16 $1,061,374 $1,060,723 $1,064,048 2/16 $1,065,874 $1,062,391 $1,065,179 3/16 $1,071,589 $1,065,756 $1,069,239 4/16 $1,080,905 $1,073,593 $1,076,490 5/16 $1,084,201 $1,076,497 $1,078,089 6/16 $1,102,188 $1,093,622 $1,095,798 7/16 $1,100,603 $1,094,290 $1,095,316 8/16 $1,108,840 $1,095,766 $1,095,797 9/16 $1,107,226 $1,090,297 $1,091,461 10/16 $1,099,393 $1,078,859 $1,081,865 11/16 $1,064,232 $1,038,623 $1,042,001 12/16 $1,072,586 $1,050,816 $1,056,064 1/17 $1,075,999 $1,057,744 $1,062,752 2/17 $1,081,949 $1,065,088 $1,069,150 3/17 $1,084,138 $1,067,401 $1,071,294 4/17 $1,092,588 $1,075,146 $1,078,851 5/17 $1,107,404 $1,092,209 $1,095,468 6/17 $1,103,218 $1,088,292 $1,091,744 7/17 $1,109,315 $1,097,097 $1,100,919 8/17 $1,115,274 $1,105,446 $1,107,924 9/17 $1,112,313 $1,099,825 $1,100,608 10/17 $1,101,626 $1,102,510 $1,102,958 11/17 $1,098,665 $1,096,607 $1,094,643 12/17 $1,106,079 $1,108,068 $1,107,714 1/18 $1,099,177 $1,095,023 $1,094,914 2/18 $1,098,779 $1,091,751 $1,090,511 3/18 $1,103,591 $1,095,781 $1,094,746 4/18 $1,103,160 $1,091,870 $1,090,507 5/18 $1,114,587 $1,104,374 $1,101,894 6/18 $1,115,489 $1,105,316 $1,103,475 7/18 $1,121,426 $1,107,998 $1,105,379 8/18 $1,123,504 $1,110,844 $1,108,237 9/18 $1,117,549 $1,103,652 $1,100,850 10/18 $1,111,529 $1,096,856 $1,094,012 11/18 $1,121,502 $1,108,996 $1,107,768 12/18 $1,134,195 $1,122,274 $1,122,125 1/19 $1,142,818 $1,130,758 $1,131,283 2/19 $1,148,676 $1,136,812 $1,136,937 3/19 $1,161,198 $1,154,783 $1,153,464 4/19 $1,165,448 $1,159,123 $1,157,143 5/19 $1,179,205 $1,175,103 $1,172,509 6/19 $1,183,357 $1,179,442 $1,177,364 7/19 $1,191,555 $1,188,947 $1,186,485 8/19 $1,212,126 $1,207,701 $1,206,056 9/19 $1,203,921 $1,198,020 $1,194,871 10/19 $1,203,901 $1,200,167 $1,197,789 11/19 $1,205,405 $1,203,169 $1,201,434 12/19 $1,208,339 $1,206,842 $1,204,311 1/20 $1,227,904 $1,228,525 $1,226,242 2/20 $1,243,330 $1,244,367 $1,241,345 3/20 $1,214,257 $1,199,230 $1,208,856 4/20 $1,203,238 $1,184,180 $1,201,113 5/20 $1,239,688 $1,221,850 $1,241,955 6/20 $1,246,719 $1,231,906 $1,243,883 7/20 $1,264,929 $1,252,655 $1,263,972 8/20 $1,257,684 $1,246,777 $1,256,762 9/20 $1,257,286 $1,247,042 $1,257,113 10/20 $1,254,061 $1,243,296 $1,253,733 11/20 $1,271,998 $1,262,058 $1,271,624 12/20 $1,278,354 $1,269,746 $1,276,849 1/21 $1,281,885 $1,277,837 $1,281,954 2/21 $1,261,202 $1,257,534 $1,259,637 3/21 $1,266,244 $1,265,290 $1,266,806 4/21 $1,277,103 $1,275,903 $1,276,799 5/21 $1,280,605 $1,279,709 $1,280,295 6/21 $1,284,149 $1,283,223 $1,280,685 7/21 $1,291,974 $1,293,866 $1,292,777 8/21 $1,289,747 $1,289,118 $1,288,998 9/21 $1,279,001 $1,279,814 $1,277,126 10/21 $1,278,179 $1,276,072 $1,273,903 11/21 $1,287,497 $1,286,935 $1,284,595 12/21 $1,289,578 $1,289,012 $1,287,756 1/22 $1,256,806 $1,253,728 $1,250,300 2/22 $1,251,731 $1,249,236 $1,246,652 3/22 $1,216,022 $1,208,739 $1,204,744 4/22 $1,181,923 $1,175,306 $1,167,687 5/22 $1,195,987 $1,192,765 $1,186,404 6/22 $1,176,395 $1,173,230 $1,165,800 7/22 $1,202,236 $1,204,229 $1,197,761 8/22 $1,176,585 $1,177,836 $1,170,341 9/22 $1,137,776 $1,132,630 $1,124,361 10/22 $1,131,669 $1,123,211 $1,115,880 11/22 $1,180,731 $1,175,747 $1,166,664 12/22 $1,182,498 $1,179,113 $1,172,637 1/23 $1,212,615 $1,212,983 $1,204,240 2/23 $1,184,632 $1,185,555 $1,177,047 3/23 $1,210,422 $1,211,860 $1,203,875 4/23 $1,207,763 $1,209,092 $1,202,019 5/23 $1,194,508 $1,198,614 $1,189,669 6/23 $1,205,434 $1,210,621 $1,200,980 7/23 $1,208,842 $1,215,410 $1,204,325 8/23 $1,192,540 $1,197,913 $1,182,201 9/23 $1,161,045 $1,162,804 $1,141,584 10/23 $1,147,810 $1,152,908 $1,131,576 11/23 $1,212,752 $1,226,096 $1,210,538 12/23 $1,242,545 $1,254,593 $1,240,418 1/24 $1,241,520 $1,248,186 $1,232,788 2/24 $1,242,002 $1,249,789 $1,233,830 3/24 $1,242,566 $1,249,749 $1,234,171 4/24 $1,230,681 $1,234,271 $1,215,029 5/24 $1,231,244 $1,230,651 $1,212,533 6/24 $1,249,105 $1,249,514 $1,230,700 7/24 $1,259,116 $1,260,903 $1,242,346 8/24 $1,266,017 $1,270,847 $1,252,938 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 6.16% 0.87% 2.38% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Oregon Municipal Bond Index 5.98% 0.76% 2.28% |
| AssetsNet | $ 194,540,469 |
| Holdings Count | Holding | 119 |
| Advisory Fees Paid, Amount | $ 611,051 |
| InvestmentCompanyPortfolioTurnover | 47% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $194,540,469 # of Portfolio Holdings 119 Portfolio Turnover Rate 47% Total Advisory Fees Paid $611,051 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.6% Electric Utilities 4.1% Housing 4.4% Special Tax Revenue 4.8% Transportation 5.2% Water and Sewer 8.2% Education 8.8% Hospital 15.3% General Obligations 43.6% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013151 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance South Carolina Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | EASCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance South Carolina Municipal Income Fund for the period of September 1, 2023 to August 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-B394"><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 in bonds with 22+ years remaining to maturity detracted from Index-relative returns during the period ↓ Security selections and an underweight position in the transportation sector, which outperformed the Index during the period, detracted from Index-relative returns ↓ Security selections in local general obligation bonds detracted from Index-relative returns during the period ↑ Security selections and an underweight position in AAA-rated bonds helped Index-relative returns as AAA bonds underperformed lower-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ Security selections and an overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose 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-B399"><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 South Carolina Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,714 $10,010 $9,999 10/14 $9,785 $10,079 $10,071 11/14 $9,793 $10,096 $10,083 12/14 $9,885 $10,147 $10,149 1/15 $10,082 $10,327 $10,359 2/15 $9,974 $10,220 $10,217 3/15 $10,014 $10,250 $10,261 4/15 $9,947 $10,196 $10,190 5/15 $9,913 $10,168 $10,169 6/15 $9,847 $10,159 $10,149 7/15 $9,920 $10,232 $10,236 8/15 $9,919 $10,252 $10,256 9/15 $10,026 $10,327 $10,322 10/15 $10,057 $10,368 $10,354 11/15 $10,122 $10,409 $10,401 12/15 $10,206 $10,482 $10,476 1/16 $10,311 $10,607 $10,614 2/16 $10,351 $10,624 $10,638 3/16 $10,401 $10,658 $10,694 4/16 $10,484 $10,736 $10,790 5/16 $10,511 $10,765 $10,833 6/16 $10,672 $10,936 $11,037 7/16 $10,655 $10,943 $11,046 8/16 $10,726 $10,958 $11,051 9/16 $10,686 $10,903 $10,998 10/16 $10,601 $10,789 $10,874 11/16 $10,247 $10,386 $10,417 12/16 $10,341 $10,508 $10,549 1/17 $10,368 $10,577 $10,619 2/17 $10,417 $10,651 $10,666 3/17 $10,433 $10,674 $10,511 4/17 $10,516 $10,751 $10,637 5/17 $10,668 $10,922 $10,843 6/17 $10,626 $10,883 $10,857 7/17 $10,665 $10,971 $10,932 8/17 $10,737 $11,054 $11,061 9/17 $10,719 $10,998 $10,978 10/17 $10,653 $11,025 $11,028 11/17 $10,588 $10,966 $11,011 12/17 $10,638 $11,081 $11,146 1/18 $10,583 $10,950 $10,997 2/18 $10,552 $10,918 $10,933 3/18 $10,579 $10,958 $10,965 4/18 $10,560 $10,919 $10,936 5/18 $10,670 $11,044 $11,023 6/18 $10,698 $11,053 $11,058 7/18 $10,762 $11,080 $11,065 8/18 $10,778 $11,108 $11,087 9/18 $10,725 $11,037 $11,006 10/18 $10,672 $10,969 $10,966 11/18 $10,746 $11,090 $11,062 12/18 $10,853 $11,223 $11,198 1/19 $10,937 $11,308 $11,280 2/19 $11,011 $11,368 $11,406 3/19 $11,110 $11,548 $11,606 4/19 $11,126 $11,591 $11,667 5/19 $11,247 $11,751 $11,878 6/19 $11,284 $11,794 $11,919 7/19 $11,347 $11,889 $12,000 8/19 $11,469 $12,077 $12,182 9/19 $11,408 $11,980 $12,106 10/19 $11,418 $12,002 $12,127 11/19 $11,429 $12,032 $12,154 12/19 $11,466 $12,068 $12,196 1/20 $11,613 $12,285 $12,367 2/20 $11,723 $12,444 $12,546 3/20 $11,425 $11,992 $12,097 4/20 $11,300 $11,842 $11,923 5/20 $11,608 $12,219 $12,234 6/20 $11,706 $12,319 $12,458 7/20 $11,839 $12,527 $12,647 8/20 $11,809 $12,468 $12,648 9/20 $11,818 $12,470 $12,655 10/20 $11,826 $12,433 $12,621 11/20 $11,948 $12,621 $12,806 12/20 $11,994 $12,697 $12,883 1/21 $12,062 $12,778 $12,996 2/21 $11,929 $12,575 $12,800 3/21 $11,959 $12,653 $12,864 4/21 $12,026 $12,759 $12,957 5/21 $12,054 $12,797 $12,989 6/21 $12,071 $12,832 $13,017 7/21 $12,138 $12,939 $13,108 8/21 $12,116 $12,891 $13,072 9/21 $12,030 $12,798 $13,028 10/21 $12,008 $12,761 $12,975 11/21 $12,089 $12,869 $13,063 12/21 $12,093 $12,890 $13,088 1/22 $11,815 $12,537 $12,783 2/22 $11,757 $12,492 $12,720 3/22 $11,441 $12,087 $12,308 4/22 $11,203 $11,753 $11,969 5/22 $11,298 $11,928 $12,102 6/22 $11,162 $11,732 $11,851 7/22 $11,361 $12,042 $12,146 8/22 $11,184 $11,778 $11,924 9/22 $10,866 $11,326 $11,442 10/22 $10,821 $11,232 $11,312 11/22 $11,194 $11,757 $11,839 12/22 $11,227 $11,791 $11,897 1/23 $11,456 $12,130 $12,253 2/23 $11,256 $11,856 $11,995 3/23 $11,434 $12,119 $12,227 4/23 $11,432 $12,091 $12,180 5/23 $11,350 $11,986 $12,136 6/23 $11,413 $12,106 $12,272 7/23 $11,438 $12,154 $12,330 8/23 $11,345 $11,979 $12,105 9/23 $11,030 $11,628 $11,705 10/23 $10,888 $11,529 $11,622 11/23 $11,495 $12,261 $12,380 12/23 $11,728 $12,546 $12,694 1/24 $11,733 $12,482 $12,606 2/24 $11,738 $12,498 $12,622 3/24 $11,744 $12,497 $12,685 4/24 $11,641 $12,343 $12,526 5/24 $11,648 $12,307 $12,511 6/24 $11,818 $12,495 $12,720 7/24 $11,907 $12,609 $12,838 8/24 $11,972 $12,708 $12,938 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 5.50% 0.86% 2.15% Class A with 3.25% Maximum Sales Charge 2.04% 0.18% 1.82% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg South Carolina Municipal Bond Index 6.88% 1.21% 2.61% |
| AssetsNet | $ 181,965,920 |
| Holdings Count | Holding | 91 |
| Advisory Fees Paid, Amount | $ 647,151 |
| InvestmentCompanyPortfolioTurnover | 99% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $181,965,920 # of Portfolio Holdings 91 Portfolio Turnover Rate 99% Total Advisory Fees Paid $647,151 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 9.7% Senior Living/Life Care 3.2% Housing 4.3% Lease Rev./Cert. of Participation 4.7% Transportation 5.7% Electric Utilities 12.6% Water and Sewer 17.8% Hospital 19.1% General Obligations 22.9% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013153 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance South Carolina Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECSCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance South Carolina Municipal Income Fund for the period of September 1, 2023 to August 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-B419"><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 in bonds with 22+ years remaining to maturity detracted from Index-relative returns during the period ↓ Security selections and an underweight position in the transportation sector, which outperformed the Index during the period, detracted from Index-relative returns ↓ Security selections in local general obligation bonds detracted from Index-relative returns during the period ↑ Security selections and an underweight position in AAA-rated bonds helped Index-relative returns as AAA bonds underperformed lower-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ Security selections and an overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose 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-B424"><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 South Carolina Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,024 $10,010 $9,999 10/14 $10,098 $10,079 $10,071 11/14 $10,102 $10,096 $10,083 12/14 $10,186 $10,147 $10,149 1/15 $10,393 $10,327 $10,359 2/15 $10,274 $10,220 $10,217 3/15 $10,297 $10,250 $10,261 4/15 $10,228 $10,196 $10,190 5/15 $10,179 $10,168 $10,169 6/15 $10,111 $10,159 $10,149 7/15 $10,178 $10,232 $10,236 8/15 $10,172 $10,252 $10,256 9/15 $10,271 $10,327 $10,322 10/15 $10,296 $10,368 $10,354 11/15 $10,354 $10,409 $10,401 12/15 $10,441 $10,482 $10,476 1/16 $10,548 $10,607 $10,614 2/16 $10,571 $10,624 $10,638 3/16 $10,625 $10,658 $10,694 4/16 $10,700 $10,736 $10,790 5/16 $10,721 $10,765 $10,833 6/16 $10,871 $10,936 $11,037 7/16 $10,849 $10,943 $11,046 8/16 $10,911 $10,958 $11,051 9/16 $10,868 $10,903 $10,998 10/16 $10,781 $10,789 $10,874 11/16 $10,416 $10,386 $10,417 12/16 $10,500 $10,508 $10,549 1/17 $10,521 $10,577 $10,619 2/17 $10,564 $10,651 $10,666 3/17 $10,573 $10,674 $10,511 4/17 $10,648 $10,751 $10,637 5/17 $10,798 $10,922 $10,843 6/17 $10,754 $10,883 $10,857 7/17 $10,785 $10,971 $10,932 8/17 $10,849 $11,054 $11,061 9/17 $10,815 $10,998 $10,978 10/17 $10,748 $11,025 $11,028 11/17 $10,681 $10,966 $11,011 12/17 $10,712 $11,081 $11,146 1/18 $10,654 $10,950 $10,997 2/18 $10,620 $10,918 $10,933 3/18 $10,641 $10,958 $10,965 4/18 $10,617 $10,919 $10,936 5/18 $10,716 $11,044 $11,023 6/18 $10,750 $11,053 $11,058 7/18 $10,793 $11,080 $11,065 8/18 $10,814 $11,108 $11,087 9/18 $10,749 $11,037 $11,006 10/18 $10,693 $10,969 $10,966 11/18 $10,758 $11,090 $11,062 12/18 $10,854 $11,223 $11,198 1/19 $10,927 $11,308 $11,280 2/19 $10,992 $11,368 $11,406 3/19 $11,091 $11,548 $11,606 4/19 $11,101 $11,591 $11,667 5/19 $11,209 $11,751 $11,878 6/19 $11,250 $11,794 $11,919 7/19 $11,303 $11,889 $12,000 8/19 $11,412 $12,077 $12,182 9/19 $11,348 $11,980 $12,106 10/19 $11,340 $12,002 $12,127 11/19 $11,357 $12,032 $12,154 12/19 $11,374 $12,068 $12,196 1/20 $11,529 $12,285 $12,367 2/20 $11,615 $12,444 $12,546 3/20 $11,331 $11,992 $12,097 4/20 $11,197 $11,842 $11,923 5/20 $11,478 $12,219 $12,234 6/20 $11,575 $12,319 $12,458 7/20 $11,693 $12,527 $12,647 8/20 $11,659 $12,468 $12,648 9/20 $11,673 $12,470 $12,655 10/20 $11,663 $12,433 $12,621 11/20 $11,781 $12,621 $12,806 12/20 $11,829 $12,697 $12,883 1/21 $11,875 $12,778 $12,996 2/21 $11,734 $12,575 $12,800 3/21 $11,767 $12,653 $12,864 4/21 $11,822 $12,759 $12,957 5/21 $11,830 $12,797 $12,989 6/21 $11,850 $12,832 $13,017 7/21 $11,906 $12,939 $13,108 8/21 $11,879 $12,891 $13,072 9/21 $11,793 $12,798 $13,028 10/21 $11,766 $12,761 $12,975 11/21 $11,834 $12,869 $13,063 12/21 $11,819 $12,890 $13,088 1/22 $11,545 $12,537 $12,783 2/22 $11,486 $12,492 $12,720 3/22 $11,166 $12,087 $12,308 4/22 $10,929 $11,753 $11,969 5/22 $11,010 $11,928 $12,102 6/22 $10,879 $11,732 $11,851 7/22 $11,068 $12,042 $12,146 8/22 $10,876 $11,778 $11,924 9/22 $10,567 $11,326 $11,442 10/22 $10,509 $11,232 $11,312 11/22 $10,868 $11,757 $11,839 12/22 $10,892 $11,791 $11,897 1/23 $11,120 $12,130 $12,253 2/23 $10,909 $11,856 $11,995 3/23 $11,077 $12,119 $12,227 4/23 $11,057 $12,091 $12,180 5/23 $10,977 $11,986 $12,136 6/23 $11,041 $12,106 $12,272 7/23 $11,058 $12,154 $12,330 8/23 $10,956 $11,979 $12,105 9/23 $10,652 $11,628 $11,705 10/23 $10,506 $11,529 $11,622 11/23 $11,077 $12,261 $12,380 12/23 $11,308 $12,546 $12,694 1/24 $11,307 $12,482 $12,606 2/24 $11,295 $12,498 $12,622 3/24 $11,294 $12,497 $12,685 4/24 $11,184 $12,343 $12,526 5/24 $11,185 $12,307 $12,511 6/24 $11,346 $12,495 $12,720 7/24 $11,421 $12,609 $12,838 8/24 $11,641 $12,708 $12,938 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 4.71% 0.11% 1.53% Class C with 1% Maximum Deferred Sales Charge 3.71% 0.11% 1.53% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg South Carolina Municipal Bond Index 6.88% 1.21% 2.61% |
| AssetsNet | $ 181,965,920 |
| Holdings Count | Holding | 91 |
| Advisory Fees Paid, Amount | $ 647,151 |
| InvestmentCompanyPortfolioTurnover | 99% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $181,965,920 # of Portfolio Holdings 91 Portfolio Turnover Rate 99% Total Advisory Fees Paid $647,151 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 9.7% Senior Living/Life Care 3.2% Housing 4.3% Lease Rev./Cert. of Participation 4.7% Transportation 5.7% Electric Utilities 12.6% Water and Sewer 17.8% Hospital 19.1% General Obligations 22.9% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000063952 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance South Carolina Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EISCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance South Carolina Municipal Income Fund for the period of September 1, 2023 to August 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-B444"><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 in bonds with 22+ years remaining to maturity detracted from Index-relative returns during the period ↓ Security selections and an underweight position in the transportation sector, which outperformed the Index during the period, detracted from Index-relative returns ↓ Security selections in local general obligation bonds detracted from Index-relative returns during the period ↑ Security selections and an underweight position in AAA-rated bonds helped Index-relative returns as AAA bonds underperformed lower-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ Security selections and an overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose 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-B449"><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 South Carolina Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,004,242 $1,001,017 $999,916 10/14 $1,011,736 $1,007,880 $1,007,122 11/14 $1,012,745 $1,009,624 $1,008,278 12/14 $1,022,385 $1,014,718 $1,014,935 1/15 $1,042,947 $1,032,703 $1,035,896 2/15 $1,031,893 $1,022,050 $1,021,678 3/15 $1,035,061 $1,025,002 $1,026,147 4/15 $1,029,479 $1,019,624 $1,019,035 5/15 $1,026,082 $1,016,807 $1,016,910 6/15 $1,019,425 $1,015,880 $1,014,931 7/15 $1,027,213 $1,023,239 $1,023,562 8/15 $1,027,263 $1,025,248 $1,025,562 9/15 $1,038,501 $1,032,675 $1,032,160 10/15 $1,041,920 $1,036,780 $1,035,434 11/15 $1,048,801 $1,040,903 $1,040,101 12/15 $1,057,657 $1,048,216 $1,047,609 1/16 $1,068,715 $1,060,723 $1,061,415 2/16 $1,072,983 $1,062,391 $1,063,777 3/16 $1,078,396 $1,065,756 $1,069,385 4/16 $1,087,195 $1,073,593 $1,078,951 5/16 $1,090,209 $1,076,497 $1,083,266 6/16 $1,107,052 $1,093,622 $1,103,669 7/16 $1,105,470 $1,094,290 $1,104,596 8/16 $1,113,009 $1,095,766 $1,105,133 9/16 $1,109,045 $1,090,297 $1,099,783 10/16 $1,100,408 $1,078,859 $1,087,440 11/16 $1,063,897 $1,038,623 $1,041,744 12/16 $1,073,815 $1,050,816 $1,054,870 1/17 $1,076,778 $1,057,744 $1,061,875 2/17 $1,082,091 $1,065,088 $1,066,645 3/17 $1,083,892 $1,067,401 $1,051,089 4/17 $1,092,734 $1,075,146 $1,063,711 5/17 $1,108,674 $1,092,209 $1,084,314 6/17 $1,104,568 $1,088,292 $1,085,683 7/17 $1,108,720 $1,097,097 $1,093,199 8/17 $1,116,461 $1,105,446 $1,106,077 9/17 $1,113,499 $1,099,825 $1,097,769 10/17 $1,108,131 $1,102,510 $1,102,842 11/17 $1,101,556 $1,096,607 $1,101,143 12/17 $1,106,941 $1,108,068 $1,114,582 1/18 $1,100,185 $1,095,023 $1,099,743 2/18 $1,098,340 $1,091,751 $1,093,346 3/18 $1,101,344 $1,095,781 $1,096,500 4/18 $1,099,490 $1,091,870 $1,093,616 5/18 $1,111,112 $1,104,374 $1,102,317 6/18 $1,114,270 $1,105,316 $1,105,807 7/18 $1,121,073 $1,107,998 $1,106,484 8/18 $1,122,938 $1,110,844 $1,108,730 9/18 $1,117,673 $1,103,652 $1,100,568 10/18 $1,112,333 $1,096,856 $1,096,642 11/18 $1,120,236 $1,108,996 $1,106,218 12/18 $1,131,509 $1,122,274 $1,119,775 1/19 $1,140,503 $1,130,758 $1,128,035 2/19 $1,148,355 $1,136,812 $1,140,650 3/19 $1,158,892 $1,154,783 $1,160,609 4/19 $1,160,698 $1,159,123 $1,166,651 5/19 $1,173,574 $1,175,103 $1,187,828 6/19 $1,177,634 $1,179,442 $1,191,875 7/19 $1,184,349 $1,188,947 $1,199,999 8/19 $1,197,297 $1,207,701 $1,218,197 9/19 $1,191,073 $1,198,020 $1,210,596 10/19 $1,191,047 $1,200,167 $1,212,741 11/19 $1,193,726 $1,203,169 $1,215,361 12/19 $1,197,774 $1,206,842 $1,219,594 1/20 $1,213,343 $1,228,525 $1,236,668 2/20 $1,223,670 $1,244,367 $1,254,574 3/20 $1,194,120 $1,199,230 $1,209,684 4/20 $1,181,278 $1,184,180 $1,192,341 5/20 $1,212,323 $1,221,850 $1,223,400 6/20 $1,223,993 $1,231,906 $1,245,770 7/20 $1,236,824 $1,252,655 $1,264,750 8/20 $1,235,245 $1,246,777 $1,264,842 9/20 $1,236,373 $1,247,042 $1,265,454 10/20 $1,236,151 $1,243,296 $1,262,051 11/20 $1,250,393 $1,262,058 $1,280,623 12/20 $1,255,377 $1,269,746 $1,288,342 1/21 $1,261,455 $1,277,837 $1,299,615 2/21 $1,249,068 $1,257,534 $1,279,957 3/21 $1,252,409 $1,265,290 $1,286,374 4/21 $1,259,594 $1,275,903 $1,295,716 5/21 $1,261,447 $1,279,709 $1,298,899 6/21 $1,264,704 $1,283,223 $1,301,662 7/21 $1,271,902 $1,293,866 $1,310,809 8/21 $1,269,813 $1,289,118 $1,307,220 9/21 $1,261,106 $1,279,814 $1,302,848 10/21 $1,258,977 $1,276,072 $1,297,472 11/21 $1,267,644 $1,286,935 $1,306,297 12/21 $1,266,908 $1,289,012 $1,308,799 1/22 $1,238,030 $1,253,728 $1,278,288 2/22 $1,233,526 $1,249,236 $1,272,036 3/22 $1,200,615 $1,208,739 $1,230,798 4/22 $1,175,817 $1,175,306 $1,196,923 5/22 $1,186,004 $1,192,765 $1,210,196 6/22 $1,171,895 $1,173,230 $1,185,121 7/22 $1,192,996 $1,204,229 $1,214,583 8/22 $1,173,270 $1,177,836 $1,192,411 9/22 $1,141,503 $1,132,630 $1,144,236 10/22 $1,135,621 $1,123,211 $1,131,167 11/22 $1,176,260 $1,175,747 $1,183,898 12/22 $1,179,914 $1,179,113 $1,189,683 1/23 $1,204,191 $1,212,983 $1,225,319 2/23 $1,182,039 $1,185,555 $1,199,457 3/23 $1,202,300 $1,211,860 $1,222,684 4/23 $1,200,855 $1,209,092 $1,217,984 5/23 $1,193,864 $1,198,614 $1,213,633 6/23 $1,200,705 $1,210,621 $1,227,215 7/23 $1,203,478 $1,215,410 $1,233,028 8/23 $1,192,562 $1,197,913 $1,210,531 9/23 $1,161,057 $1,162,804 $1,170,541 10/23 $1,146,330 $1,152,908 $1,162,236 11/23 $1,208,912 $1,226,096 $1,237,966 12/23 $1,235,031 $1,254,593 $1,269,407 1/24 $1,235,780 $1,248,186 $1,260,642 2/24 $1,236,551 $1,249,789 $1,262,238 3/24 $1,237,339 $1,249,749 $1,268,496 4/24 $1,226,778 $1,234,271 $1,252,633 5/24 $1,227,652 $1,230,651 $1,251,096 6/24 $1,245,789 $1,249,514 $1,272,038 7/24 $1,255,326 $1,260,903 $1,283,818 8/24 $1,260,752 $1,270,847 $1,293,783 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 5.72% 1.04% 2.34% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg South Carolina Municipal Bond Index 6.88% 1.21% 2.61% |
| AssetsNet | $ 181,965,920 |
| Holdings Count | Holding | 91 |
| Advisory Fees Paid, Amount | $ 647,151 |
| InvestmentCompanyPortfolioTurnover | 99% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $181,965,920 # of Portfolio Holdings 91 Portfolio Turnover Rate 99% Total Advisory Fees Paid $647,151 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 9.7% Senior Living/Life Care 3.2% Housing 4.3% Lease Rev./Cert. of Participation 4.7% Transportation 5.7% Electric Utilities 12.6% Water and Sewer 17.8% Hospital 19.1% General Obligations 22.9% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013157 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Virginia Municipal Income Fund |
| Class Name | Class A |
| Trading Symbol | ETVAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Virginia Municipal Income Fund for the period of September 1, 2023 to August 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-B469"><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 $76 0.74% |
| Expenses Paid, Amount | $ 76 |
| Expense Ratio, Percent | 0.74% |
| 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): ↑ An overweight position in bonds rated BBB and below helped Index-relative returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↓ An overweight position in the water and sewer sector, which underperformed the Index during the period, detracted from Index-relative returns ↓ Security selections in the housing sector detracted from Index-relative returns during the period ↓ An overweight position in bonds with 2-4 years remaining to maturity detracted from Index-relative returns as shorter-maturity bonds generally underperformed longer-maturity bonds 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-B474"><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 Virginia Municipal Bond Index 8/14 $9,675 $10,000 $10,000 9/14 $9,741 $10,010 $10,004 10/14 $9,770 $10,079 $10,075 11/14 $9,729 $10,096 $10,087 12/14 $9,760 $10,147 $10,128 1/15 $9,863 $10,327 $10,293 2/15 $9,821 $10,220 $10,194 3/15 $9,852 $10,250 $10,231 4/15 $9,823 $10,196 $10,187 5/15 $9,804 $10,168 $10,165 6/15 $9,787 $10,159 $10,162 7/15 $9,818 $10,232 $10,225 8/15 $9,838 $10,252 $10,253 9/15 $9,895 $10,327 $10,324 10/15 $9,939 $10,368 $10,364 11/15 $9,996 $10,409 $10,394 12/15 $10,090 $10,482 $10,452 1/16 $10,209 $10,607 $10,577 2/16 $10,229 $10,624 $10,603 3/16 $10,248 $10,658 $10,629 4/16 $10,342 $10,736 $10,699 5/16 $10,374 $10,765 $10,716 6/16 $10,544 $10,936 $10,871 7/16 $10,535 $10,943 $10,876 8/16 $10,552 $10,958 $10,879 9/16 $10,518 $10,903 $10,842 10/16 $10,458 $10,789 $10,738 11/16 $10,192 $10,386 $10,349 12/16 $10,261 $10,508 $10,478 1/17 $10,311 $10,577 $10,552 2/17 $10,367 $10,651 $10,619 3/17 $10,383 $10,674 $10,639 4/17 $10,452 $10,751 $10,723 5/17 $10,547 $10,922 $10,873 6/17 $10,524 $10,883 $10,839 7/17 $10,566 $10,971 $10,912 8/17 $10,622 $11,054 $10,984 9/17 $10,562 $10,998 $10,912 10/17 $10,516 $11,025 $10,921 11/17 $10,443 $10,966 $10,838 12/17 $10,504 $11,081 $10,969 1/18 $10,415 $10,950 $10,847 2/18 $10,395 $10,918 $10,811 3/18 $10,442 $10,958 $10,853 4/18 $10,417 $10,919 $10,809 5/18 $10,513 $11,044 $10,928 6/18 $10,542 $11,053 $10,937 7/18 $10,568 $11,080 $10,958 8/18 $10,599 $11,108 $10,983 9/18 $10,545 $11,037 $10,914 10/18 $10,490 $10,969 $10,858 11/18 $10,587 $11,090 $10,975 12/18 $10,683 $11,223 $11,102 1/19 $10,764 $11,308 $11,191 2/19 $10,820 $11,368 $11,249 3/19 $10,944 $11,548 $11,403 4/19 $10,958 $11,591 $11,430 5/19 $11,082 $11,751 $11,571 6/19 $11,122 $11,794 $11,613 7/19 $11,203 $11,889 $11,710 8/19 $11,369 $12,077 $11,860 9/19 $11,294 $11,980 $11,773 10/19 $11,289 $12,002 $11,799 11/19 $11,299 $12,032 $11,832 12/19 $11,326 $12,068 $11,860 1/20 $11,523 $12,285 $12,043 2/20 $11,649 $12,444 $12,162 3/20 $11,258 $11,992 $11,836 4/20 $11,155 $11,842 $11,764 5/20 $11,513 $12,219 $12,132 6/20 $11,597 $12,319 $12,183 7/20 $11,753 $12,527 $12,353 8/20 $11,720 $12,468 $12,315 9/20 $11,728 $12,470 $12,323 10/20 $11,693 $12,433 $12,279 11/20 $11,862 $12,621 $12,433 12/20 $11,928 $12,697 $12,475 1/21 $11,979 $12,778 $12,540 2/21 $11,812 $12,575 $12,366 3/21 $11,831 $12,653 $12,422 4/21 $11,925 $12,759 $12,506 5/21 $11,974 $12,797 $12,527 6/21 $11,994 $12,832 $12,559 7/21 $12,073 $12,939 $12,651 8/21 $12,033 $12,891 $12,604 9/21 $11,934 $12,798 $12,530 10/21 $11,908 $12,761 $12,505 11/21 $11,988 $12,869 $12,586 12/21 $11,993 $12,890 $12,605 1/22 $11,684 $12,537 $12,301 2/22 $11,600 $12,492 $12,262 3/22 $11,276 $12,087 $11,876 4/22 $10,966 $11,753 $11,547 5/22 $11,077 $11,928 $11,718 6/22 $10,918 $11,732 $11,523 7/22 $11,182 $12,042 $11,830 8/22 $10,914 $11,778 $11,563 9/22 $10,542 $11,326 $11,075 10/22 $10,457 $11,232 $11,002 11/22 $10,892 $11,757 $11,521 12/22 $10,899 $11,791 $11,548 1/23 $11,182 $12,130 $11,883 2/23 $10,930 $11,856 $11,590 3/23 $11,108 $12,119 $11,858 4/23 $11,102 $12,091 $11,825 5/23 $11,003 $11,986 $11,717 6/23 $11,084 $12,106 $11,840 7/23 $11,126 $12,154 $11,878 8/23 $10,982 $11,979 $11,687 9/23 $10,638 $11,628 $11,303 10/23 $10,465 $11,529 $11,198 11/23 $11,139 $12,261 $11,976 12/23 $11,389 $12,546 $12,264 1/24 $11,404 $12,482 $12,185 2/24 $11,404 $12,498 $12,203 3/24 $11,435 $12,497 $12,205 4/24 $11,355 $12,343 $12,050 5/24 $11,323 $12,307 $12,010 6/24 $11,501 $12,495 $12,205 7/24 $11,568 $12,609 $12,308 8/24 $11,659 $12,708 $12,395 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A 6.12% 0.50% 1.88% Class A with 3.25% Maximum Sales Charge 2.62% (0.17)% 1.55% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Virginia Municipal Bond Index 6.05% 0.89% 2.17% |
| AssetsNet | $ 60,961,725 |
| Holdings Count | Holding | 65 |
| Advisory Fees Paid, Amount | $ 162,441 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $60,961,725 # of Portfolio Holdings 65 Portfolio Turnover Rate 77% Total Advisory Fees Paid $162,441 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.4% Electric Utilities 4.1% Bond Bank 4.7% Lease Rev./Cert. of Participation 5.3% Education 7.2% Senior Living/Life Care 7.3% Housing 9.1% Water and Sewer 12.9% General Obligations 13.3% Transportation 14.1% Hospital 16.6% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000013159 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Virginia Municipal Income Fund |
| Class Name | Class C |
| Trading Symbol | ECVAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Virginia Municipal Income Fund for the period of September 1, 2023 to August 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-B494"><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 1.49% |
| Expenses Paid, Amount | $ 153 |
| Expense Ratio, Percent | 1.49% |
| 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): ↓ An overweight position in the water and sewer sector, which underperformed the Index during the period, detracted from Index-relative returns ↓ Security selections in the housing sector detracted from Index-relative returns during the period ↓ An overweight position in bonds with 2-4 years remaining to maturity detracted from Index-relative returns as shorter-maturity bonds generally underperformed longer-maturity bonds during the period ↑ An overweight position in bonds rated BBB and below helped Index-relative returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose 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-B499"><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 Virginia Municipal Bond Index 8/14 $10,000 $10,000 $10,000 9/14 $10,069 $10,010 $10,004 10/14 $10,082 $10,079 $10,075 11/14 $10,040 $10,096 $10,087 12/14 $10,065 $10,147 $10,128 1/15 $10,158 $10,327 $10,293 2/15 $10,116 $10,220 $10,194 3/15 $10,141 $10,250 $10,231 4/15 $10,100 $10,196 $10,187 5/15 $10,080 $10,168 $10,165 6/15 $10,060 $10,159 $10,162 7/15 $10,086 $10,232 $10,225 8/15 $10,101 $10,252 $10,253 9/15 $10,140 $10,327 $10,324 10/15 $10,189 $10,368 $10,364 11/15 $10,250 $10,409 $10,394 12/15 $10,322 $10,482 $10,452 1/16 $10,441 $10,607 $10,577 2/16 $10,456 $10,624 $10,603 3/16 $10,481 $10,658 $10,629 4/16 $10,565 $10,736 $10,699 5/16 $10,591 $10,765 $10,716 6/16 $10,755 $10,936 $10,871 7/16 $10,743 $10,943 $10,876 8/16 $10,755 $10,958 $10,879 9/16 $10,708 $10,903 $10,842 10/16 $10,638 $10,789 $10,738 11/16 $10,366 $10,386 $10,349 12/16 $10,426 $10,508 $10,478 1/17 $10,480 $10,577 $10,552 2/17 $10,517 $10,651 $10,619 3/17 $10,528 $10,674 $10,639 4/17 $10,588 $10,751 $10,723 5/17 $10,695 $10,922 $10,873 6/17 $10,658 $10,883 $10,839 7/17 $10,692 $10,971 $10,912 8/17 $10,741 $11,054 $10,984 9/17 $10,670 $10,998 $10,912 10/17 $10,612 $11,025 $10,921 11/17 $10,542 $10,966 $10,838 12/17 $10,594 $11,081 $10,969 1/18 $10,509 $10,950 $10,847 2/18 $10,476 $10,918 $10,811 3/18 $10,504 $10,958 $10,853 4/18 $10,476 $10,919 $10,809 5/18 $10,572 $11,044 $10,928 6/18 $10,595 $11,053 $10,937 7/18 $10,615 $11,080 $10,958 8/18 $10,639 $11,108 $10,983 9/18 $10,587 $11,037 $10,914 10/18 $10,520 $10,969 $10,858 11/18 $10,604 $11,090 $10,975 12/18 $10,699 $11,223 $11,102 1/19 $10,769 $11,308 $11,191 2/19 $10,815 $11,368 $11,249 3/19 $10,936 $11,548 $11,403 4/19 $10,944 $11,591 $11,430 5/19 $11,064 $11,751 $11,571 6/19 $11,096 $11,794 $11,613 7/19 $11,177 $11,889 $11,710 8/19 $11,334 $12,077 $11,860 9/19 $11,237 $11,980 $11,773 10/19 $11,240 $12,002 $11,799 11/19 $11,232 $12,032 $11,832 12/19 $11,264 $12,068 $11,860 1/20 $11,448 $12,285 $12,043 2/20 $11,570 $12,444 $12,162 3/20 $11,176 $11,992 $11,836 4/20 $11,054 $11,842 $11,764 5/20 $11,408 $12,219 $12,132 6/20 $11,479 $12,319 $12,183 7/20 $11,640 $12,527 $12,353 8/20 $11,579 $12,468 $12,315 9/20 $11,582 $12,470 $12,323 10/20 $11,558 $12,433 $12,279 11/20 $11,717 $12,621 $12,433 12/20 $11,771 $12,697 $12,475 1/21 $11,810 $12,778 $12,540 2/21 $11,631 $12,575 $12,366 3/21 $11,655 $12,653 $12,422 4/21 $11,734 $12,759 $12,506 5/21 $11,772 $12,797 $12,527 6/21 $11,785 $12,832 $12,559 7/21 $11,849 $12,939 $12,651 8/21 $11,821 $12,891 $12,604 9/21 $11,714 $12,798 $12,530 10/21 $11,673 $12,761 $12,505 11/21 $11,738 $12,869 $12,586 12/21 $11,737 $12,890 $12,605 1/22 $11,432 $12,537 $12,301 2/22 $11,354 $12,492 $12,262 3/22 $11,022 $12,087 $11,876 4/22 $10,705 $11,753 $11,547 5/22 $10,811 $11,928 $11,718 6/22 $10,653 $11,732 $11,523 7/22 $10,894 $12,042 $11,830 8/22 $10,640 $11,778 $11,563 9/22 $10,268 $11,326 $11,075 10/22 $10,176 $11,232 $11,002 11/22 $10,593 $11,757 $11,521 12/22 $10,595 $11,791 $11,548 1/23 $10,865 $12,130 $11,883 2/23 $10,601 $11,856 $11,590 3/23 $10,779 $12,119 $11,858 4/23 $10,756 $12,091 $11,825 5/23 $10,665 $11,986 $11,717 6/23 $10,732 $12,106 $11,840 7/23 $10,764 $12,154 $11,878 8/23 $10,621 $11,979 $11,687 9/23 $10,276 $11,628 $11,303 10/23 $10,108 $11,529 $11,198 11/23 $10,746 $12,261 $11,976 12/23 $10,988 $12,546 $12,264 1/24 $10,984 $12,482 $12,185 2/24 $10,993 $12,498 $12,203 3/24 $11,016 $12,497 $12,205 4/24 $10,916 $12,343 $12,050 5/24 $10,898 $12,307 $12,010 6/24 $11,049 $12,495 $12,205 7/24 $11,117 $12,609 $12,308 8/24 $11,361 $12,708 $12,395 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 5.33% (0.26)% 1.28% Class C with 1% Maximum Deferred Sales Charge 4.33% (0.26)% 1.28% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Virginia Municipal Bond Index 6.05% 0.89% 2.17% |
| AssetsNet | $ 60,961,725 |
| Holdings Count | Holding | 65 |
| Advisory Fees Paid, Amount | $ 162,441 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $60,961,725 # of Portfolio Holdings 65 Portfolio Turnover Rate 77% Total Advisory Fees Paid $162,441 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.4% Electric Utilities 4.1% Bond Bank 4.7% Lease Rev./Cert. of Participation 5.3% Education 7.2% Senior Living/Life Care 7.3% Housing 9.1% Water and Sewer 12.9% General Obligations 13.3% Transportation 14.1% Hospital 16.6% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| C000063953 | |
| Shareholder Report [Line Items] | |
| Fund Name | Eaton Vance Virginia Municipal Income Fund |
| Class Name | Class I |
| Trading Symbol | EVAIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Eaton Vance Virginia Municipal Income Fund for the period of September 1, 2023 to August 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-B519"><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 0.54% |
| Expenses Paid, Amount | $ 56 |
| Expense Ratio, Percent | 0.54% |
| 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): ↑ An overweight position in bonds rated BBB and below helped Index-relative returns as lower-rated bonds generally outperformed higher-rated bonds ↑ Security selections and an overweight position in the health care sector, which outperformed the Index, contributed to Index-relative returns ↑ An overweight position in 4% coupon bonds, which typically have longer durations than higher-coupon bonds, contributed to Index-relative returns as interest rates generally declined and bond prices rose during the period ↓ An overweight position in the water and sewer sector, which underperformed the Index during the period, detracted from Index-relative returns ↓ Security selections in the housing sector detracted from Index-relative returns during the period ↓ An overweight position in bonds with 2-4 years remaining to maturity detracted from Index-relative returns as shorter-maturity bonds generally underperformed longer-maturity bonds 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-B524"><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 Virginia Municipal Bond Index 8/14 $1,000,000 $1,000,000 $1,000,000 9/14 $1,006,944 $1,001,017 $1,000,393 10/14 $1,010,176 $1,007,880 $1,007,468 11/14 $1,006,109 $1,009,624 $1,008,653 12/14 $1,009,436 $1,014,718 $1,012,778 1/15 $1,020,298 $1,032,703 $1,029,299 2/15 $1,016,082 $1,022,050 $1,019,357 3/15 $1,019,459 $1,025,002 $1,023,054 4/15 $1,016,614 $1,019,624 $1,018,726 5/15 $1,014,930 $1,016,807 $1,016,533 6/15 $1,013,281 $1,015,880 $1,016,234 7/15 $1,016,726 $1,023,239 $1,022,479 8/15 $1,018,892 $1,025,248 $1,025,311 9/15 $1,025,005 $1,032,675 $1,032,424 10/15 $1,029,738 $1,036,780 $1,036,422 11/15 $1,035,756 $1,040,903 $1,039,437 12/15 $1,045,674 $1,048,216 $1,045,172 1/16 $1,058,225 $1,060,723 $1,057,665 2/16 $1,060,421 $1,062,391 $1,060,347 3/16 $1,062,543 $1,065,756 $1,062,897 4/16 $1,072,463 $1,073,593 $1,069,903 5/16 $1,076,010 $1,076,497 $1,071,626 6/16 $1,093,712 $1,093,622 $1,087,079 7/16 $1,093,025 $1,094,290 $1,087,573 8/16 $1,094,953 $1,095,766 $1,087,888 9/16 $1,091,639 $1,090,297 $1,084,222 10/16 $1,085,613 $1,078,859 $1,073,808 11/16 $1,058,252 $1,038,623 $1,034,856 12/16 $1,065,591 $1,050,816 $1,047,750 1/17 $1,070,935 $1,057,744 $1,055,194 2/17 $1,076,923 $1,065,088 $1,061,916 3/17 $1,078,816 $1,067,401 $1,063,895 4/17 $1,086,139 $1,075,146 $1,072,262 5/17 $1,096,163 $1,092,209 $1,087,302 6/17 $1,093,936 $1,088,292 $1,083,933 7/17 $1,098,519 $1,097,097 $1,091,195 8/17 $1,104,517 $1,105,446 $1,098,386 9/17 $1,098,537 $1,099,825 $1,091,234 10/17 $1,094,005 $1,102,510 $1,092,087 11/17 $1,086,722 $1,096,607 $1,083,808 12/17 $1,092,058 $1,108,068 $1,096,933 1/18 $1,084,371 $1,095,023 $1,084,669 2/18 $1,082,484 $1,091,751 $1,081,077 3/18 $1,086,176 $1,095,781 $1,085,336 4/18 $1,083,692 $1,091,870 $1,080,907 5/18 $1,095,302 $1,104,374 $1,092,812 6/18 $1,098,510 $1,105,316 $1,093,710 7/18 $1,101,464 $1,107,998 $1,095,782 8/18 $1,104,869 $1,110,844 $1,098,284 9/18 $1,099,419 $1,103,652 $1,091,410 10/18 $1,093,863 $1,096,856 $1,085,800 11/18 $1,102,717 $1,108,996 $1,097,514 12/18 $1,112,837 $1,122,274 $1,110,219 1/19 $1,122,995 $1,130,758 $1,119,125 2/19 $1,128,918 $1,136,812 $1,124,876 3/19 $1,140,631 $1,154,783 $1,140,312 4/19 $1,143,713 $1,159,123 $1,143,046 5/19 $1,156,857 $1,175,103 $1,157,090 6/19 $1,161,201 $1,179,442 $1,161,331 7/19 $1,169,850 $1,188,947 $1,170,990 8/19 $1,187,285 $1,207,701 $1,185,950 9/19 $1,178,205 $1,198,020 $1,177,253 10/19 $1,179,367 $1,200,167 $1,179,902 11/19 $1,179,174 $1,203,169 $1,183,179 12/19 $1,183,654 $1,206,842 $1,185,957 1/20 $1,204,365 $1,228,525 $1,204,267 2/20 $1,217,736 $1,244,367 $1,216,204 3/20 $1,177,190 $1,199,230 $1,183,619 4/20 $1,165,163 $1,184,180 $1,176,382 5/20 $1,202,687 $1,221,850 $1,213,163 6/20 $1,211,684 $1,231,906 $1,218,285 7/20 $1,229,653 $1,252,655 $1,235,328 8/20 $1,224,912 $1,246,777 $1,231,472 9/20 $1,225,973 $1,247,042 $1,232,335 10/20 $1,223,975 $1,243,296 $1,227,924 11/20 $1,241,855 $1,262,058 $1,243,273 12/20 $1,249,009 $1,269,746 $1,247,458 1/21 $1,254,532 $1,277,837 $1,253,959 2/21 $1,237,247 $1,257,534 $1,236,569 3/21 $1,239,452 $1,265,290 $1,242,211 4/21 $1,249,503 $1,275,903 $1,250,635 5/21 $1,253,369 $1,279,709 $1,252,692 6/21 $1,255,670 $1,283,223 $1,255,888 7/21 $1,264,089 $1,293,866 $1,265,051 8/21 $1,261,670 $1,289,118 $1,260,407 9/21 $1,251,516 $1,279,814 $1,253,047 10/21 $1,247,522 $1,276,072 $1,250,458 11/21 $1,256,046 $1,286,935 $1,258,630 12/21 $1,256,820 $1,289,012 $1,260,475 1/22 $1,224,673 $1,253,728 $1,230,067 2/22 $1,217,695 $1,249,236 $1,226,244 3/22 $1,183,913 $1,208,739 $1,187,625 4/22 $1,150,130 $1,175,306 $1,154,726 5/22 $1,161,969 $1,192,765 $1,171,781 6/22 $1,147,006 $1,173,230 $1,152,312 7/22 $1,173,287 $1,204,229 $1,183,026 8/22 $1,147,045 $1,177,836 $1,156,282 9/22 $1,106,639 $1,132,630 $1,107,508 10/22 $1,099,539 $1,123,211 $1,100,206 11/22 $1,145,267 $1,175,747 $1,152,145 12/22 $1,146,191 $1,179,113 $1,154,800 1/23 $1,176,080 $1,212,983 $1,188,314 2/23 $1,148,272 $1,185,555 $1,159,027 3/23 $1,168,730 $1,211,860 $1,185,761 4/23 $1,166,701 $1,209,092 $1,182,527 5/23 $1,156,532 $1,198,614 $1,171,655 6/23 $1,166,834 $1,210,621 $1,184,048 7/23 $1,169,793 $1,215,410 $1,187,811 8/23 $1,154,929 $1,197,913 $1,168,705 9/23 $1,118,963 $1,162,804 $1,130,254 10/23 $1,100,987 $1,152,908 $1,119,807 11/23 $1,171,959 $1,226,096 $1,197,598 12/23 $1,200,162 $1,254,593 $1,226,435 1/24 $1,200,303 $1,248,186 $1,218,460 2/24 $1,202,089 $1,249,789 $1,220,305 3/24 $1,205,589 $1,249,749 $1,220,478 4/24 $1,195,751 $1,234,271 $1,205,000 5/24 $1,194,237 $1,230,651 $1,201,040 6/24 $1,211,486 $1,249,514 $1,220,484 7/24 $1,220,434 $1,260,903 $1,230,787 8/24 $1,229,658 $1,270,847 $1,239,467 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class I 6.47% 0.70% 2.09% Bloomberg Municipal Bond Index 6.09% 1.02% 2.42% Bloomberg Virginia Municipal Bond Index 6.05% 0.89% 2.17% |
| AssetsNet | $ 60,961,725 |
| Holdings Count | Holding | 65 |
| Advisory Fees Paid, Amount | $ 162,441 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $60,961,725 # of Portfolio Holdings 65 Portfolio Turnover Rate 77% Total Advisory Fees Paid $162,441 |
| Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Other Footnote Reference 5.4% Electric Utilities 4.1% Bond Bank 4.7% Lease Rev./Cert. of Participation 5.3% Education 7.2% Senior Living/Life Care 7.3% Housing 9.1% Water and Sewer 12.9% General Obligations 13.3% Transportation 14.1% Hospital 16.6% Footnote Description Footnote * Sectors less than 3% each |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 1-800-262-1122 |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Aug. 31, 2024 | 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 | |
| C000013178 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,894 | $ 11,836 | $ 11,748 | $ 11,574 | $ 11,588 | $ 11,702 | $ 11,702 | $ 11,716 | $ 11,731 | $ 11,446 | $ 10,776 | $ 10,933 | $ 11,246 | $ 11,362 | $ 11,336 | $ 11,254 | $ 11,356 | $ 11,359 | $ 11,153 | $ 11,380 | $ 11,107 | $ 11,086 | $ 10,661 | $ 10,724 | $ 11,090 | $ 11,320 | $ 11,081 | $ 11,228 | $ 11,101 | $ 11,372 | $ 11,686 | $ 11,751 | $ 12,050 | $ 12,035 | $ 11,952 | $ 11,965 | $ 12,059 | $ 12,098 | $ 12,016 | $ 12,001 | $ 11,972 | $ 11,887 | $ 11,830 | $ 12,002 | $ 11,957 | $ 11,899 | $ 11,746 | $ 11,781 | $ 11,762 | $ 11,822 | $ 11,656 | $ 11,595 | $ 11,256 | $ 11,394 | $ 11,729 | $ 11,602 | $ 11,422 | $ 11,387 | $ 11,377 | $ 11,367 | $ 11,461 | $ 11,309 | $ 11,234 | $ 11,186 | $ 11,059 | $ 11,048 | $ 10,907 | $ 10,869 | $ 10,766 | $ 10,651 | $ 10,536 | $ 10,600 | $ 10,650 | $ 10,626 | $ 10,601 | $ 10,599 | $ 10,497 | $ 10,521 | $ 10,471 | $ 10,496 | $ 10,608 | $ 10,520 | $ 10,568 | $ 10,604 | $ 10,652 | $ 10,563 | $ 10,514 | $ 10,549 | $ 10,401 | $ 10,327 | $ 10,314 | $ 10,252 | $ 10,240 | $ 10,130 | $ 10,490 | $ 10,598 | $ 10,632 | $ 10,594 | $ 10,628 | $ 10,459 | $ 10,433 | $ 10,347 | $ 10,286 | $ 10,309 | $ 10,200 | $ 10,115 | $ 10,053 | $ 10,027 | $ 9,942 | $ 9,916 | $ 9,854 | $ 9,885 | $ 9,891 | $ 9,931 | $ 9,914 | $ 9,964 | $ 9,832 | $ 9,756 | $ 9,782 | $ 9,729 | $ 9,675 |
| C000013180 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063956 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013104 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,662 | 11,595 | 11,510 | 11,329 | 11,341 | 11,462 | 11,461 | 11,459 | 11,472 | 11,158 | 10,492 | 10,639 | 10,972 | 11,090 | 11,052 | 10,960 | 11,056 | 11,073 | 10,838 | 11,107 | 10,780 | 10,799 | 10,330 | 10,403 | 10,817 | 11,075 | 10,795 | 10,997 | 10,849 | 11,171 | 11,533 | 11,581 | 11,852 | 11,850 | 11,744 | 11,768 | 11,869 | 11,905 | 11,800 | 11,772 | 11,706 | 11,613 | 11,583 | 11,757 | 11,674 | 11,592 | 11,406 | 11,438 | 11,430 | 11,485 | 11,299 | 11,188 | 10,826 | 11,131 | 11,535 | 11,389 | 11,206 | 11,185 | 11,165 | 11,169 | 11,244 | 11,074 | 10,990 | 10,954 | 10,832 | 10,808 | 10,649 | 10,600 | 10,539 | 10,443 | 10,346 | 10,407 | 10,467 | 10,466 | 10,431 | 10,429 | 10,333 | 10,368 | 10,332 | 10,356 | 10,462 | 10,378 | 10,423 | 10,423 | 10,469 | 10,410 | 10,351 | 10,382 | 10,260 | 10,210 | 10,195 | 10,145 | 10,097 | 10,013 | 10,296 | 10,362 | 10,394 | 10,368 | 10,377 | 10,264 | 10,252 | 10,182 | 10,142 | 10,149 | 10,066 | 9,996 | 9,957 | 9,919 | 9,880 | 9,842 | 9,804 | 9,808 | 9,835 | 9,872 | 9,855 | 9,923 | 9,788 | 9,749 | 9,752 | 9,692 | 9,675 |
| C000013106 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063947 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013120 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,882 | 11,803 | 11,714 | 11,545 | 11,565 | 11,693 | 11,687 | 11,681 | 11,689 | 11,404 | 10,764 | 10,919 | 11,257 | 11,399 | 11,369 | 11,274 | 11,362 | 11,372 | 11,149 | 11,418 | 11,135 | 11,110 | 10,622 | 10,713 | 11,136 | 11,383 | 11,105 | 11,324 | 11,189 | 11,509 | 11,830 | 11,885 | 12,192 | 12,173 | 12,078 | 12,096 | 12,213 | 12,256 | 12,149 | 12,131 | 12,112 | 12,005 | 11,924 | 12,138 | 12,106 | 12,049 | 11,868 | 11,897 | 11,889 | 11,950 | 11,790 | 11,738 | 11,382 | 11,537 | 11,835 | 11,687 | 11,503 | 11,475 | 11,460 | 11,470 | 11,538 | 11,355 | 11,278 | 11,240 | 11,094 | 11,067 | 10,922 | 10,847 | 10,772 | 10,686 | 10,587 | 10,663 | 10,726 | 10,698 | 10,658 | 10,641 | 10,521 | 10,549 | 10,509 | 10,503 | 10,575 | 10,500 | 10,561 | 10,619 | 10,633 | 10,558 | 10,505 | 10,541 | 10,411 | 10,348 | 10,329 | 10,276 | 10,257 | 10,184 | 10,501 | 10,580 | 10,615 | 10,553 | 10,555 | 10,375 | 10,345 | 10,283 | 10,242 | 10,233 | 10,129 | 10,045 | 10,004 | 9,963 | 9,891 | 9,861 | 9,800 | 9,853 | 9,865 | 9,918 | 9,888 | 9,982 | 9,830 | 9,761 | 9,762 | 9,703 | 9,675 |
| C000013122 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000092719 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013136 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,722 | 11,666 | 11,567 | 11,400 | 11,412 | 11,519 | 11,517 | 11,515 | 11,527 | 11,256 | 10,635 | 10,782 | 11,063 | 11,171 | 11,161 | 11,070 | 11,193 | 11,210 | 11,016 | 11,245 | 10,988 | 10,956 | 10,569 | 10,629 | 10,978 | 11,209 | 10,958 | 11,111 | 10,979 | 11,262 | 11,558 | 11,620 | 11,903 | 11,901 | 11,820 | 11,844 | 11,944 | 11,980 | 11,887 | 11,858 | 11,842 | 11,734 | 11,690 | 11,874 | 11,805 | 11,750 | 11,579 | 11,611 | 11,616 | 11,671 | 11,498 | 11,413 | 11,101 | 11,265 | 11,641 | 11,492 | 11,294 | 11,271 | 11,260 | 11,263 | 11,339 | 11,156 | 11,084 | 11,038 | 10,905 | 10,882 | 10,761 | 10,724 | 10,652 | 10,552 | 10,452 | 10,522 | 10,579 | 10,564 | 10,537 | 10,522 | 10,436 | 10,456 | 10,441 | 10,472 | 10,574 | 10,489 | 10,555 | 10,575 | 10,606 | 10,532 | 10,493 | 10,512 | 10,392 | 10,329 | 10,301 | 10,250 | 10,222 | 10,138 | 10,474 | 10,560 | 10,612 | 10,574 | 10,580 | 10,430 | 10,402 | 10,329 | 10,289 | 10,271 | 10,154 | 10,081 | 10,041 | 10,013 | 9,954 | 9,947 | 9,864 | 9,900 | 9,925 | 9,993 | 9,943 | 10,042 | 9,853 | 9,782 | 9,785 | 9,714 | 9,675 |
| C000013138 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063950 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013142 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,015 | 11,947 | 11,839 | 11,687 | 11,683 | 11,783 | 11,794 | 11,777 | 11,803 | 11,523 | 10,894 | 11,036 | 11,322 | 11,493 | 11,463 | 11,361 | 11,488 | 11,516 | 11,272 | 11,540 | 11,242 | 11,241 | 10,762 | 10,836 | 11,207 | 11,453 | 11,209 | 11,383 | 11,265 | 11,578 | 11,934 | 11,984 | 12,284 | 12,280 | 12,193 | 12,203 | 12,294 | 12,331 | 12,245 | 12,227 | 12,182 | 12,094 | 12,034 | 12,247 | 12,215 | 12,157 | 11,987 | 12,020 | 12,026 | 12,083 | 11,925 | 11,859 | 11,512 | 11,619 | 11,899 | 11,753 | 11,568 | 11,542 | 11,529 | 11,531 | 11,612 | 11,417 | 11,327 | 11,289 | 11,159 | 11,133 | 11,015 | 10,961 | 10,867 | 10,760 | 10,666 | 10,725 | 10,772 | 10,766 | 10,711 | 10,704 | 10,596 | 10,602 | 10,558 | 10,563 | 10,619 | 10,562 | 10,592 | 10,696 | 10,727 | 10,659 | 10,614 | 10,656 | 10,515 | 10,436 | 10,417 | 10,361 | 10,330 | 10,251 | 10,579 | 10,668 | 10,686 | 10,608 | 10,625 | 10,442 | 10,424 | 10,335 | 10,270 | 10,240 | 10,115 | 10,071 | 10,028 | 10,008 | 9,896 | 9,887 | 9,833 | 9,893 | 9,908 | 9,957 | 9,927 | 10,030 | 9,810 | 9,734 | 9,759 | 9,717 | 9,675 |
| C000013144 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000092722 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013151 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,972 | 11,907 | 11,818 | 11,648 | 11,641 | 11,744 | 11,738 | 11,733 | 11,728 | 11,495 | 10,888 | 11,030 | 11,345 | 11,438 | 11,413 | 11,350 | 11,432 | 11,434 | 11,256 | 11,456 | 11,227 | 11,194 | 10,821 | 10,866 | 11,184 | 11,361 | 11,162 | 11,298 | 11,203 | 11,441 | 11,757 | 11,815 | 12,093 | 12,089 | 12,008 | 12,030 | 12,116 | 12,138 | 12,071 | 12,054 | 12,026 | 11,959 | 11,929 | 12,062 | 11,994 | 11,948 | 11,826 | 11,818 | 11,809 | 11,839 | 11,706 | 11,608 | 11,300 | 11,425 | 11,723 | 11,613 | 11,466 | 11,429 | 11,418 | 11,408 | 11,469 | 11,347 | 11,284 | 11,247 | 11,126 | 11,110 | 11,011 | 10,937 | 10,853 | 10,746 | 10,672 | 10,725 | 10,778 | 10,762 | 10,698 | 10,670 | 10,560 | 10,579 | 10,552 | 10,583 | 10,638 | 10,588 | 10,653 | 10,719 | 10,737 | 10,665 | 10,626 | 10,668 | 10,516 | 10,433 | 10,417 | 10,368 | 10,341 | 10,247 | 10,601 | 10,686 | 10,726 | 10,655 | 10,672 | 10,511 | 10,484 | 10,401 | 10,351 | 10,311 | 10,206 | 10,122 | 10,057 | 10,026 | 9,919 | 9,920 | 9,847 | 9,913 | 9,947 | 10,014 | 9,974 | 10,082 | 9,885 | 9,793 | 9,785 | 9,714 | 9,675 |
| C000013153 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063952 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000013157 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 11,659 | 11,568 | 11,501 | 11,323 | 11,355 | 11,435 | 11,404 | 11,404 | 11,389 | 11,139 | 10,465 | 10,638 | 10,982 | 11,126 | 11,084 | 11,003 | 11,102 | 11,108 | 10,930 | 11,182 | 10,899 | 10,892 | 10,457 | 10,542 | 10,914 | 11,182 | 10,918 | 11,077 | 10,966 | 11,276 | 11,600 | 11,684 | 11,993 | 11,988 | 11,908 | 11,934 | 12,033 | 12,073 | 11,994 | 11,974 | 11,925 | 11,831 | 11,812 | 11,979 | 11,928 | 11,862 | 11,693 | 11,728 | 11,720 | 11,753 | 11,597 | 11,513 | 11,155 | 11,258 | 11,649 | 11,523 | 11,326 | 11,299 | 11,289 | 11,294 | 11,369 | 11,203 | 11,122 | 11,082 | 10,958 | 10,944 | 10,820 | 10,764 | 10,683 | 10,587 | 10,490 | 10,545 | 10,599 | 10,568 | 10,542 | 10,513 | 10,417 | 10,442 | 10,395 | 10,415 | 10,504 | 10,443 | 10,516 | 10,562 | 10,622 | 10,566 | 10,524 | 10,547 | 10,452 | 10,383 | 10,367 | 10,311 | 10,261 | 10,192 | 10,458 | 10,518 | 10,552 | 10,535 | 10,544 | 10,374 | 10,342 | 10,248 | 10,229 | 10,209 | 10,090 | 9,996 | 9,939 | 9,895 | 9,838 | 9,818 | 9,787 | 9,804 | 9,823 | 9,852 | 9,821 | 9,863 | 9,760 | 9,729 | 9,770 | 9,741 | 9,675 |
| C000013159 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| C000063953 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 12,708 | 12,609 | 12,495 | 12,307 | 12,343 | 12,497 | 12,498 | 12,482 | 12,546 | 12,261 | 11,529 | 11,628 | 11,979 | 12,154 | 12,106 | 11,986 | 12,091 | 12,119 | 11,856 | 12,130 | 11,791 | 11,757 | 11,232 | 11,326 | 11,778 | 12,042 | 11,732 | 11,928 | 11,753 | 12,087 | 12,492 | 12,537 | 12,890 | 12,869 | 12,761 | 12,798 | 12,891 | 12,939 | 12,832 | 12,797 | 12,759 | 12,653 | 12,575 | 12,778 | 12,697 | 12,621 | 12,433 | 12,470 | 12,468 | 12,527 | 12,319 | 12,219 | 11,842 | 11,992 | 12,444 | 12,285 | 12,068 | 12,032 | 12,002 | 11,980 | 12,077 | 11,889 | 11,794 | 11,751 | 11,591 | 11,548 | 11,368 | 11,308 | 11,223 | 11,090 | 10,969 | 11,037 | 11,108 | 11,080 | 11,053 | 11,044 | 10,919 | 10,958 | 10,918 | 10,950 | 11,081 | 10,966 | 11,025 | 10,998 | 11,054 | 10,971 | 10,883 | 10,922 | 10,751 | 10,674 | 10,651 | 10,577 | 10,508 | 10,386 | 10,789 | 10,903 | 10,958 | 10,943 | 10,936 | 10,765 | 10,736 | 10,658 | 10,624 | 10,607 | 10,482 | 10,409 | 10,368 | 10,327 | 10,252 | 10,232 | 10,159 | 10,168 | 10,196 | 10,250 | 10,220 | 10,327 | 10,147 | 10,096 | 10,079 | 10,010 | 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 | $ 1,270,847 | 1,260,903 | 1,249,514 | 1,230,651 | 1,234,271 | 1,249,749 | 1,249,789 | 1,248,186 | 1,254,593 | 1,226,096 | 1,152,908 | 1,162,804 | 1,197,913 | 1,215,410 | 1,210,621 | 1,198,614 | 1,209,092 | 1,211,860 | 1,185,555 | 1,212,983 | 1,179,113 | 1,175,747 | 1,123,211 | 1,132,630 | 1,177,836 | 1,204,229 | 1,173,230 | 1,192,765 | 1,175,306 | 1,208,739 | 1,249,236 | 1,253,728 | 1,289,012 | 1,286,935 | 1,276,072 | 1,279,814 | 1,289,118 | 1,293,866 | 1,283,223 | 1,279,709 | 1,275,903 | 1,265,290 | 1,257,534 | 1,277,837 | 1,269,746 | 1,262,058 | 1,243,296 | 1,247,042 | 1,246,777 | 1,252,655 | 1,231,906 | 1,221,850 | 1,184,180 | 1,199,230 | 1,244,367 | 1,228,525 | 1,206,842 | 1,203,169 | 1,200,167 | 1,198,020 | 1,207,701 | 1,188,947 | 1,179,442 | 1,175,103 | 1,159,123 | 1,154,783 | 1,136,812 | 1,130,758 | 1,122,274 | 1,108,996 | 1,096,856 | 1,103,652 | 1,110,844 | 1,107,998 | 1,105,316 | 1,104,374 | 1,091,870 | 1,095,781 | 1,091,751 | 1,095,023 | 1,108,068 | 1,096,607 | 1,102,510 | 1,099,825 | 1,105,446 | 1,097,097 | 1,088,292 | 1,092,209 | 1,075,146 | 1,067,401 | 1,065,088 | 1,057,744 | 1,050,816 | 1,038,623 | 1,078,859 | 1,090,297 | 1,095,766 | 1,094,290 | 1,093,622 | 1,076,497 | 1,073,593 | 1,065,756 | 1,062,391 | 1,060,723 | 1,048,216 | 1,040,903 | 1,036,780 | 1,032,675 | 1,025,248 | 1,023,239 | 1,015,880 | 1,016,807 | 1,019,624 | 1,025,002 | 1,022,050 | 1,032,703 | 1,014,718 | 1,009,624 | 1,007,880 | 1,001,017 | 1,000,000 |
| EATON VANCE Index: Bloomberg Georgia Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Georgia Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,475 | 12,385 | 12,246 | 12,073 | 12,099 | 12,231 | 12,209 | 12,184 | 12,255 | 11,981 | 11,298 | 11,378 | 11,711 | 11,856 | 11,812 | 11,704 | 11,818 | 11,817 | 11,582 | 11,845 | 11,516 | 11,501 | 10,995 | 11,103 | 11,553 | 11,809 | 11,526 | 11,695 | 11,549 | 11,852 | 12,243 | 12,285 | 12,608 | 12,594 | 12,487 | 12,532 | 12,615 | 12,655 | 12,557 | 12,535 | 12,513 | 12,430 | 12,356 | 12,545 | 12,483 | 12,439 | 12,280 | 12,309 | 12,290 | 12,322 | 12,134 | 12,014 | 11,651 | 11,763 | 12,206 | 12,049 | 11,845 | 11,806 | 11,774 | 11,747 | 11,859 | 11,689 | 11,602 | 11,554 | 11,402 | 11,363 | 11,209 | 11,154 | 11,072 | 10,955 | 10,836 | 10,891 | 10,957 | 10,939 | 10,920 | 10,904 | 10,798 | 10,833 | 10,807 | 10,825 | 10,940 | 10,844 | 10,903 | 10,879 | 10,939 | 10,868 | 10,797 | 10,835 | 10,683 | 10,616 | 10,603 | 10,538 | 10,474 | 10,364 | 10,722 | 10,811 | 10,865 | 10,845 | 10,835 | 10,685 | 10,669 | 10,602 | 10,579 | 10,562 | 10,447 | 10,392 | 10,360 | 10,330 | 10,260 | 10,233 | 10,158 | 10,161 | 10,181 | 10,230 | 10,196 | 10,294 | 10,128 | 10,082 | 10,065 | 10,002 | 10,000 |
| EATON VANCE Index: Bloomberg Georgia Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Georgia Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,475 | 12,385 | 12,246 | 12,073 | 12,099 | 12,231 | 12,209 | 12,184 | 12,255 | 11,981 | 11,298 | 11,378 | 11,711 | 11,856 | 11,812 | 11,704 | 11,818 | 11,817 | 11,582 | 11,845 | 11,516 | 11,501 | 10,995 | 11,103 | 11,553 | 11,809 | 11,526 | 11,695 | 11,549 | 11,852 | 12,243 | 12,285 | 12,608 | 12,594 | 12,487 | 12,532 | 12,615 | 12,655 | 12,557 | 12,535 | 12,513 | 12,430 | 12,356 | 12,545 | 12,483 | 12,439 | 12,280 | 12,309 | 12,290 | 12,322 | 12,134 | 12,014 | 11,651 | 11,763 | 12,206 | 12,049 | 11,845 | 11,806 | 11,774 | 11,747 | 11,859 | 11,689 | 11,602 | 11,554 | 11,402 | 11,363 | 11,209 | 11,154 | 11,072 | 10,955 | 10,836 | 10,891 | 10,957 | 10,939 | 10,920 | 10,904 | 10,798 | 10,833 | 10,807 | 10,825 | 10,940 | 10,844 | 10,903 | 10,879 | 10,939 | 10,868 | 10,797 | 10,835 | 10,683 | 10,616 | 10,603 | 10,538 | 10,474 | 10,364 | 10,722 | 10,811 | 10,865 | 10,845 | 10,835 | 10,685 | 10,669 | 10,602 | 10,579 | 10,562 | 10,447 | 10,392 | 10,360 | 10,330 | 10,260 | 10,233 | 10,158 | 10,161 | 10,181 | 10,230 | 10,196 | 10,294 | 10,128 | 10,082 | 10,065 | 10,002 | 10,000 |
| EATON VANCE Index: Bloomberg Georgia Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Georgia Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,247,529 | 1,238,469 | 1,224,586 | 1,207,314 | 1,209,935 | 1,223,117 | 1,220,927 | 1,218,391 | 1,225,505 | 1,198,080 | 1,129,814 | 1,137,786 | 1,171,129 | 1,185,601 | 1,181,196 | 1,170,427 | 1,181,848 | 1,181,722 | 1,158,207 | 1,184,520 | 1,151,615 | 1,150,050 | 1,099,504 | 1,110,341 | 1,155,278 | 1,180,860 | 1,152,554 | 1,169,501 | 1,154,927 | 1,185,221 | 1,224,324 | 1,228,455 | 1,260,803 | 1,259,428 | 1,248,734 | 1,253,173 | 1,261,453 | 1,265,514 | 1,255,692 | 1,253,505 | 1,251,337 | 1,242,971 | 1,235,590 | 1,254,512 | 1,248,279 | 1,243,852 | 1,227,983 | 1,230,853 | 1,228,969 | 1,232,219 | 1,213,391 | 1,201,434 | 1,165,066 | 1,176,257 | 1,220,579 | 1,204,853 | 1,184,520 | 1,180,612 | 1,177,447 | 1,174,713 | 1,185,940 | 1,168,890 | 1,160,154 | 1,155,365 | 1,140,217 | 1,136,285 | 1,120,918 | 1,115,441 | 1,107,194 | 1,095,471 | 1,083,624 | 1,089,146 | 1,095,687 | 1,093,866 | 1,092,020 | 1,090,436 | 1,079,757 | 1,083,254 | 1,080,702 | 1,082,518 | 1,093,958 | 1,084,404 | 1,090,260 | 1,087,902 | 1,093,852 | 1,086,796 | 1,079,725 | 1,083,533 | 1,068,266 | 1,061,555 | 1,060,317 | 1,053,766 | 1,047,389 | 1,036,430 | 1,072,225 | 1,081,102 | 1,086,470 | 1,084,499 | 1,083,519 | 1,068,544 | 1,066,918 | 1,060,207 | 1,057,874 | 1,056,217 | 1,044,731 | 1,039,160 | 1,036,034 | 1,033,024 | 1,025,974 | 1,023,334 | 1,015,754 | 1,016,104 | 1,018,125 | 1,022,954 | 1,019,560 | 1,029,380 | 1,012,821 | 1,008,180 | 1,006,476 | 1,000,177 | 1,000,000 |
| EATON VANCE Index: Bloomberg Maryland Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Maryland Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,157 | 12,051 | 11,943 | 11,773 | 11,819 | 11,973 | 11,972 | 11,955 | 12,036 | 11,781 | 11,101 | 11,182 | 11,539 | 11,706 | 11,665 | 11,563 | 11,690 | 11,724 | 11,466 | 11,729 | 11,428 | 11,387 | 10,918 | 10,991 | 11,427 | 11,674 | 11,385 | 11,538 | 11,373 | 11,671 | 12,044 | 12,069 | 12,411 | 12,395 | 12,296 | 12,319 | 12,426 | 12,473 | 12,371 | 12,357 | 12,331 | 12,233 | 12,191 | 12,377 | 12,335 | 12,299 | 12,139 | 12,184 | 12,174 | 12,245 | 12,067 | 12,055 | 11,680 | 11,782 | 12,049 | 11,925 | 11,733 | 11,697 | 11,672 | 11,636 | 11,741 | 11,581 | 11,483 | 11,449 | 11,313 | 11,286 | 11,144 | 11,095 | 11,007 | 10,872 | 10,743 | 10,805 | 10,867 | 10,851 | 10,827 | 10,819 | 10,705 | 10,746 | 10,718 | 10,744 | 10,863 | 10,762 | 10,832 | 10,814 | 10,880 | 10,816 | 10,744 | 10,779 | 10,645 | 10,570 | 10,557 | 10,488 | 10,423 | 10,326 | 10,653 | 10,736 | 10,781 | 10,765 | 10,753 | 10,611 | 10,602 | 10,542 | 10,528 | 10,505 | 10,383 | 10,331 | 10,312 | 10,278 | 10,207 | 10,184 | 10,119 | 10,123 | 10,143 | 10,191 | 10,164 | 10,256 | 10,101 | 10,071 | 10,052 | 9,997 | 10,000 |
| EATON VANCE Index: Bloomberg Maryland Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Maryland Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,157 | 12,051 | 11,943 | 11,773 | 11,819 | 11,973 | 11,972 | 11,955 | 12,036 | 11,781 | 11,101 | 11,182 | 11,539 | 11,706 | 11,665 | 11,563 | 11,690 | 11,724 | 11,466 | 11,729 | 11,428 | 11,387 | 10,918 | 10,991 | 11,427 | 11,674 | 11,385 | 11,538 | 11,373 | 11,671 | 12,044 | 12,069 | 12,411 | 12,395 | 12,296 | 12,319 | 12,426 | 12,473 | 12,371 | 12,357 | 12,331 | 12,233 | 12,191 | 12,377 | 12,335 | 12,299 | 12,139 | 12,184 | 12,174 | 12,245 | 12,067 | 12,055 | 11,680 | 11,782 | 12,049 | 11,925 | 11,733 | 11,697 | 11,672 | 11,636 | 11,741 | 11,581 | 11,483 | 11,449 | 11,313 | 11,286 | 11,144 | 11,095 | 11,007 | 10,872 | 10,743 | 10,805 | 10,867 | 10,851 | 10,827 | 10,819 | 10,705 | 10,746 | 10,718 | 10,744 | 10,863 | 10,762 | 10,832 | 10,814 | 10,880 | 10,816 | 10,744 | 10,779 | 10,645 | 10,570 | 10,557 | 10,488 | 10,423 | 10,326 | 10,653 | 10,736 | 10,781 | 10,765 | 10,753 | 10,611 | 10,602 | 10,542 | 10,528 | 10,505 | 10,383 | 10,331 | 10,312 | 10,278 | 10,207 | 10,184 | 10,119 | 10,123 | 10,143 | 10,191 | 10,164 | 10,256 | 10,101 | 10,071 | 10,052 | 9,997 | 10,000 |
| EATON VANCE Index: Bloomberg Maryland Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Maryland Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,215,666 | 1,205,085 | 1,194,331 | 1,177,313 | 1,181,854 | 1,197,292 | 1,197,192 | 1,195,461 | 1,203,596 | 1,178,064 | 1,110,086 | 1,118,249 | 1,153,868 | 1,170,627 | 1,166,516 | 1,156,274 | 1,168,959 | 1,172,428 | 1,146,559 | 1,172,857 | 1,142,846 | 1,138,677 | 1,091,769 | 1,099,110 | 1,142,702 | 1,167,404 | 1,138,515 | 1,153,847 | 1,137,281 | 1,167,085 | 1,204,434 | 1,206,941 | 1,241,122 | 1,239,475 | 1,229,603 | 1,231,942 | 1,242,580 | 1,247,288 | 1,237,068 | 1,235,650 | 1,233,055 | 1,223,275 | 1,219,058 | 1,237,742 | 1,233,513 | 1,229,946 | 1,213,863 | 1,218,437 | 1,217,368 | 1,224,500 | 1,206,749 | 1,205,505 | 1,168,039 | 1,178,216 | 1,204,944 | 1,192,461 | 1,173,275 | 1,169,719 | 1,167,200 | 1,163,610 | 1,174,130 | 1,158,116 | 1,148,275 | 1,144,868 | 1,131,266 | 1,128,613 | 1,114,359 | 1,109,532 | 1,100,672 | 1,087,181 | 1,074,273 | 1,080,530 | 1,086,705 | 1,085,099 | 1,082,712 | 1,081,899 | 1,070,503 | 1,074,591 | 1,071,768 | 1,074,422 | 1,086,315 | 1,076,192 | 1,083,185 | 1,081,398 | 1,088,039 | 1,081,562 | 1,074,437 | 1,077,906 | 1,064,538 | 1,056,978 | 1,055,701 | 1,048,775 | 1,042,299 | 1,032,639 | 1,065,334 | 1,073,649 | 1,078,096 | 1,076,508 | 1,075,323 | 1,061,077 | 1,060,163 | 1,054,153 | 1,052,819 | 1,050,504 | 1,038,261 | 1,033,129 | 1,031,223 | 1,027,782 | 1,020,687 | 1,018,363 | 1,011,910 | 1,012,322 | 1,014,310 | 1,019,060 | 1,016,394 | 1,025,621 | 1,010,089 | 1,007,082 | 1,005,167 | 999,750 | 1,000,000 |
| EATON VANCE Index: Bloomberg Missouri Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Missouri Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,805 | 12,707 | 12,593 | 12,375 | 12,399 | 12,557 | 12,507 | 12,504 | 12,582 | 12,264 | 11,439 | 11,577 | 12,028 | 12,199 | 12,152 | 12,026 | 12,127 | 12,130 | 11,884 | 12,189 | 11,797 | 11,765 | 11,190 | 11,320 | 11,879 | 12,122 | 11,835 | 12,027 | 11,867 | 12,235 | 12,628 | 12,670 | 12,988 | 12,969 | 12,843 | 12,899 | 12,988 | 13,050 | 12,939 | 12,887 | 12,843 | 12,723 | 12,623 | 12,831 | 12,764 | 12,662 | 12,460 | 12,498 | 12,496 | 12,547 | 12,333 | 12,223 | 11,804 | 11,974 | 12,456 | 12,291 | 12,073 | 12,032 | 12,012 | 11,998 | 12,094 | 11,892 | 11,797 | 11,746 | 11,606 | 11,560 | 11,387 | 11,335 | 11,246 | 11,108 | 10,975 | 11,046 | 11,119 | 11,091 | 11,069 | 11,058 | 10,943 | 10,980 | 10,931 | 10,957 | 11,086 | 10,982 | 11,043 | 10,999 | 11,066 | 10,995 | 10,919 | 10,938 | 10,773 | 10,695 | 10,671 | 10,590 | 10,522 | 10,376 | 10,788 | 10,907 | 10,968 | 10,950 | 10,953 | 10,765 | 10,739 | 10,664 | 10,623 | 10,601 | 10,474 | 10,413 | 10,379 | 10,352 | 10,277 | 10,252 | 10,175 | 10,185 | 10,188 | 10,239 | 10,216 | 10,314 | 10,133 | 10,092 | 10,065 | 10,001 | 10,000 |
| EATON VANCE Index: Bloomberg Missouri Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Missouri Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,805 | 12,707 | 12,593 | 12,375 | 12,399 | 12,557 | 12,507 | 12,504 | 12,582 | 12,264 | 11,439 | 11,577 | 12,028 | 12,199 | 12,152 | 12,026 | 12,127 | 12,130 | 11,884 | 12,189 | 11,797 | 11,765 | 11,190 | 11,320 | 11,879 | 12,122 | 11,835 | 12,027 | 11,867 | 12,235 | 12,628 | 12,670 | 12,988 | 12,969 | 12,843 | 12,899 | 12,988 | 13,050 | 12,939 | 12,887 | 12,843 | 12,723 | 12,623 | 12,831 | 12,764 | 12,662 | 12,460 | 12,498 | 12,496 | 12,547 | 12,333 | 12,223 | 11,804 | 11,974 | 12,456 | 12,291 | 12,073 | 12,032 | 12,012 | 11,998 | 12,094 | 11,892 | 11,797 | 11,746 | 11,606 | 11,560 | 11,387 | 11,335 | 11,246 | 11,108 | 10,975 | 11,046 | 11,119 | 11,091 | 11,069 | 11,058 | 10,943 | 10,980 | 10,931 | 10,957 | 11,086 | 10,982 | 11,043 | 10,999 | 11,066 | 10,995 | 10,919 | 10,938 | 10,773 | 10,695 | 10,671 | 10,590 | 10,522 | 10,376 | 10,788 | 10,907 | 10,968 | 10,950 | 10,953 | 10,765 | 10,739 | 10,664 | 10,623 | 10,601 | 10,474 | 10,413 | 10,379 | 10,352 | 10,277 | 10,252 | 10,175 | 10,185 | 10,188 | 10,239 | 10,216 | 10,314 | 10,133 | 10,092 | 10,065 | 10,001 | 10,000 |
| EATON VANCE Index: Bloomberg Missouri Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Missouri Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,280,487 | 1,270,689 | 1,259,263 | 1,237,451 | 1,239,919 | 1,255,658 | 1,250,731 | 1,250,440 | 1,258,240 | 1,226,425 | 1,143,932 | 1,157,668 | 1,202,804 | 1,219,878 | 1,215,202 | 1,202,563 | 1,212,664 | 1,213,016 | 1,188,388 | 1,218,911 | 1,179,710 | 1,176,452 | 1,118,991 | 1,132,009 | 1,187,920 | 1,212,220 | 1,183,493 | 1,202,686 | 1,186,691 | 1,223,457 | 1,262,830 | 1,266,952 | 1,298,814 | 1,296,925 | 1,284,311 | 1,289,894 | 1,298,846 | 1,304,955 | 1,293,886 | 1,288,694 | 1,284,250 | 1,272,306 | 1,262,293 | 1,283,129 | 1,276,420 | 1,266,155 | 1,245,953 | 1,249,792 | 1,249,640 | 1,254,666 | 1,233,348 | 1,222,306 | 1,180,386 | 1,197,374 | 1,245,644 | 1,229,125 | 1,207,329 | 1,203,183 | 1,201,173 | 1,199,821 | 1,209,438 | 1,189,165 | 1,179,680 | 1,174,588 | 1,160,591 | 1,156,024 | 1,138,708 | 1,133,498 | 1,124,559 | 1,110,789 | 1,097,482 | 1,104,571 | 1,111,853 | 1,109,131 | 1,106,946 | 1,105,800 | 1,094,317 | 1,097,958 | 1,093,129 | 1,095,659 | 1,108,594 | 1,098,215 | 1,104,348 | 1,099,900 | 1,106,643 | 1,099,542 | 1,091,890 | 1,093,791 | 1,077,303 | 1,069,526 | 1,067,100 | 1,058,952 | 1,052,177 | 1,037,588 | 1,078,809 | 1,090,741 | 1,096,831 | 1,095,030 | 1,095,341 | 1,076,473 | 1,073,933 | 1,066,367 | 1,062,272 | 1,060,150 | 1,047,366 | 1,041,262 | 1,037,912 | 1,035,192 | 1,027,744 | 1,025,220 | 1,017,529 | 1,018,469 | 1,018,790 | 1,023,894 | 1,021,588 | 1,031,424 | 1,013,261 | 1,009,167 | 1,006,532 | 1,000,060 | 1,000,000 |
| EATON VANCE Index: Bloomberg North Carolina Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg North Carolina Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,157 | 12,059 | 11,936 | 11,762 | 11,811 | 11,966 | 11,953 | 11,937 | 12,018 | 11,749 | 11,041 | 11,144 | 11,493 | 11,698 | 11,658 | 11,548 | 11,671 | 11,713 | 11,449 | 11,706 | 11,380 | 11,338 | 10,838 | 10,920 | 11,377 | 11,645 | 11,350 | 11,496 | 11,348 | 11,652 | 12,064 | 12,106 | 12,433 | 12,419 | 12,322 | 12,355 | 12,447 | 12,505 | 12,402 | 12,378 | 12,359 | 12,275 | 12,206 | 12,378 | 12,318 | 12,287 | 12,144 | 12,187 | 12,169 | 12,215 | 12,043 | 11,989 | 11,601 | 11,679 | 12,038 | 11,901 | 11,711 | 11,681 | 11,653 | 11,623 | 11,726 | 11,566 | 11,469 | 11,428 | 11,302 | 11,269 | 11,139 | 11,093 | 11,004 | 10,888 | 10,774 | 10,824 | 10,886 | 10,867 | 10,840 | 10,835 | 10,733 | 10,766 | 10,748 | 10,769 | 10,861 | 10,772 | 10,841 | 10,823 | 10,898 | 10,834 | 10,763 | 10,796 | 10,663 | 10,594 | 10,576 | 10,502 | 10,437 | 10,331 | 10,661 | 10,739 | 10,789 | 10,771 | 10,761 | 10,621 | 10,607 | 10,547 | 10,534 | 10,511 | 10,403 | 10,356 | 10,339 | 10,308 | 10,243 | 10,221 | 10,144 | 10,142 | 10,160 | 10,198 | 10,174 | 10,271 | 10,110 | 10,072 | 10,061 | 9,999 | 10,000 |
| EATON VANCE Index: Bloomberg North Carolina Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg North Carolina Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,157 | 12,059 | 11,936 | 11,762 | 11,811 | 11,966 | 11,953 | 11,937 | 12,018 | 11,749 | 11,041 | 11,144 | 11,493 | 11,698 | 11,658 | 11,548 | 11,671 | 11,713 | 11,449 | 11,706 | 11,380 | 11,338 | 10,838 | 10,920 | 11,377 | 11,645 | 11,350 | 11,496 | 11,348 | 11,652 | 12,064 | 12,106 | 12,433 | 12,419 | 12,322 | 12,355 | 12,447 | 12,505 | 12,402 | 12,378 | 12,359 | 12,275 | 12,206 | 12,378 | 12,318 | 12,287 | 12,144 | 12,187 | 12,169 | 12,215 | 12,043 | 11,989 | 11,601 | 11,679 | 12,038 | 11,901 | 11,711 | 11,681 | 11,653 | 11,623 | 11,726 | 11,566 | 11,469 | 11,428 | 11,302 | 11,269 | 11,139 | 11,093 | 11,004 | 10,888 | 10,774 | 10,824 | 10,886 | 10,867 | 10,840 | 10,835 | 10,733 | 10,766 | 10,748 | 10,769 | 10,861 | 10,772 | 10,841 | 10,823 | 10,898 | 10,834 | 10,763 | 10,796 | 10,663 | 10,594 | 10,576 | 10,502 | 10,437 | 10,331 | 10,661 | 10,739 | 10,789 | 10,771 | 10,761 | 10,621 | 10,607 | 10,547 | 10,534 | 10,511 | 10,403 | 10,356 | 10,339 | 10,308 | 10,243 | 10,221 | 10,144 | 10,142 | 10,160 | 10,198 | 10,174 | 10,271 | 10,110 | 10,072 | 10,061 | 9,999 | 10,000 |
| EATON VANCE Index: Bloomberg North Carolina Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg North Carolina Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,215,746 | 1,205,870 | 1,193,637 | 1,176,163 | 1,181,127 | 1,196,602 | 1,195,272 | 1,193,708 | 1,201,791 | 1,174,864 | 1,104,078 | 1,114,354 | 1,149,331 | 1,169,793 | 1,165,765 | 1,154,770 | 1,167,144 | 1,171,312 | 1,144,927 | 1,170,607 | 1,137,988 | 1,133,829 | 1,083,756 | 1,091,968 | 1,137,660 | 1,164,542 | 1,134,969 | 1,149,638 | 1,134,842 | 1,165,204 | 1,206,409 | 1,210,641 | 1,243,259 | 1,241,858 | 1,232,176 | 1,235,537 | 1,244,715 | 1,250,493 | 1,240,221 | 1,237,802 | 1,235,858 | 1,227,454 | 1,220,600 | 1,237,762 | 1,231,806 | 1,228,666 | 1,214,435 | 1,218,714 | 1,216,887 | 1,221,475 | 1,204,310 | 1,198,938 | 1,160,119 | 1,167,924 | 1,203,771 | 1,190,087 | 1,171,108 | 1,168,150 | 1,165,299 | 1,162,348 | 1,172,600 | 1,156,568 | 1,146,932 | 1,142,776 | 1,130,249 | 1,126,892 | 1,113,930 | 1,109,337 | 1,100,353 | 1,088,760 | 1,077,411 | 1,082,422 | 1,088,561 | 1,086,651 | 1,083,990 | 1,083,538 | 1,073,296 | 1,076,581 | 1,074,795 | 1,076,911 | 1,086,092 | 1,077,242 | 1,084,095 | 1,082,258 | 1,089,755 | 1,083,357 | 1,076,270 | 1,079,551 | 1,066,294 | 1,059,428 | 1,057,555 | 1,050,162 | 1,043,658 | 1,033,060 | 1,066,124 | 1,073,874 | 1,078,864 | 1,077,075 | 1,076,119 | 1,062,066 | 1,060,729 | 1,054,723 | 1,053,366 | 1,051,055 | 1,040,260 | 1,035,624 | 1,033,913 | 1,030,822 | 1,024,315 | 1,022,146 | 1,014,379 | 1,014,194 | 1,016,031 | 1,019,769 | 1,017,396 | 1,027,081 | 1,010,995 | 1,007,221 | 1,006,061 | 999,932 | 1,000,000 |
| EATON VANCE Index: Bloomberg Oregon Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,529 | 12,423 | 12,307 | 12,125 | 12,150 | 12,342 | 12,338 | 12,328 | 12,404 | 12,105 | 11,316 | 11,416 | 11,822 | 12,043 | 12,010 | 11,897 | 12,020 | 12,039 | 11,770 | 12,042 | 11,726 | 11,667 | 11,159 | 11,244 | 11,703 | 11,978 | 11,658 | 11,864 | 11,677 | 12,047 | 12,467 | 12,503 | 12,878 | 12,846 | 12,739 | 12,771 | 12,890 | 12,928 | 12,807 | 12,803 | 12,768 | 12,668 | 12,596 | 12,820 | 12,768 | 12,716 | 12,537 | 12,571 | 12,568 | 12,640 | 12,439 | 12,420 | 12,011 | 12,089 | 12,413 | 12,262 | 12,043 | 12,014 | 11,978 | 11,949 | 12,061 | 11,865 | 11,774 | 11,725 | 11,571 | 11,535 | 11,369 | 11,313 | 11,221 | 11,078 | 10,940 | 11,008 | 11,082 | 11,054 | 11,035 | 11,019 | 10,905 | 10,947 | 10,905 | 10,949 | 11,077 | 10,946 | 11,030 | 11,006 | 11,079 | 11,009 | 10,917 | 10,955 | 10,789 | 10,713 | 10,692 | 10,628 | 10,561 | 10,420 | 10,819 | 10,915 | 10,958 | 10,953 | 10,958 | 10,781 | 10,765 | 10,692 | 10,652 | 10,640 | 10,508 | 10,437 | 10,409 | 10,375 | 10,296 | 10,254 | 10,167 | 10,177 | 10,202 | 10,259 | 10,231 | 10,368 | 10,161 | 10,108 | 10,069 | 10,004 | 10,000 |
| EATON VANCE Index: Bloomberg Oregon Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,529 | 12,423 | 12,307 | 12,125 | 12,150 | 12,342 | 12,338 | 12,328 | 12,404 | 12,105 | 11,316 | 11,416 | 11,822 | 12,043 | 12,010 | 11,897 | 12,020 | 12,039 | 11,770 | 12,042 | 11,726 | 11,667 | 11,159 | 11,244 | 11,703 | 11,978 | 11,658 | 11,864 | 11,677 | 12,047 | 12,467 | 12,503 | 12,878 | 12,846 | 12,739 | 12,771 | 12,890 | 12,928 | 12,807 | 12,803 | 12,768 | 12,668 | 12,596 | 12,820 | 12,768 | 12,716 | 12,537 | 12,571 | 12,568 | 12,640 | 12,439 | 12,420 | 12,011 | 12,089 | 12,413 | 12,262 | 12,043 | 12,014 | 11,978 | 11,949 | 12,061 | 11,865 | 11,774 | 11,725 | 11,571 | 11,535 | 11,369 | 11,313 | 11,221 | 11,078 | 10,940 | 11,008 | 11,082 | 11,054 | 11,035 | 11,019 | 10,905 | 10,947 | 10,905 | 10,949 | 11,077 | 10,946 | 11,030 | 11,006 | 11,079 | 11,009 | 10,917 | 10,955 | 10,789 | 10,713 | 10,692 | 10,628 | 10,561 | 10,420 | 10,819 | 10,915 | 10,958 | 10,953 | 10,958 | 10,781 | 10,765 | 10,692 | 10,652 | 10,640 | 10,508 | 10,437 | 10,409 | 10,375 | 10,296 | 10,254 | 10,167 | 10,177 | 10,202 | 10,259 | 10,231 | 10,368 | 10,161 | 10,108 | 10,069 | 10,004 | 10,000 |
| EATON VANCE Index: Bloomberg Oregon Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,252,938 | 1,242,346 | 1,230,700 | 1,212,533 | 1,215,029 | 1,234,171 | 1,233,830 | 1,232,788 | 1,240,418 | 1,210,538 | 1,131,576 | 1,141,584 | 1,182,201 | 1,204,325 | 1,200,980 | 1,189,669 | 1,202,019 | 1,203,875 | 1,177,047 | 1,204,240 | 1,172,637 | 1,166,664 | 1,115,880 | 1,124,361 | 1,170,341 | 1,197,761 | 1,165,800 | 1,186,404 | 1,167,687 | 1,204,744 | 1,246,652 | 1,250,300 | 1,287,756 | 1,284,595 | 1,273,903 | 1,277,126 | 1,288,998 | 1,292,777 | 1,280,685 | 1,280,295 | 1,276,799 | 1,266,806 | 1,259,637 | 1,281,954 | 1,276,849 | 1,271,624 | 1,253,733 | 1,257,113 | 1,256,762 | 1,263,972 | 1,243,883 | 1,241,955 | 1,201,113 | 1,208,856 | 1,241,345 | 1,226,242 | 1,204,311 | 1,201,434 | 1,197,789 | 1,194,871 | 1,206,056 | 1,186,485 | 1,177,364 | 1,172,509 | 1,157,143 | 1,153,464 | 1,136,937 | 1,131,283 | 1,122,125 | 1,107,768 | 1,094,012 | 1,100,850 | 1,108,237 | 1,105,379 | 1,103,475 | 1,101,894 | 1,090,507 | 1,094,746 | 1,090,511 | 1,094,914 | 1,107,714 | 1,094,643 | 1,102,958 | 1,100,608 | 1,107,924 | 1,100,919 | 1,091,744 | 1,095,468 | 1,078,851 | 1,071,294 | 1,069,150 | 1,062,752 | 1,056,064 | 1,042,001 | 1,081,865 | 1,091,461 | 1,095,797 | 1,095,316 | 1,095,798 | 1,078,089 | 1,076,490 | 1,069,239 | 1,065,179 | 1,064,048 | 1,050,797 | 1,043,728 | 1,040,856 | 1,037,523 | 1,029,623 | 1,025,450 | 1,016,704 | 1,017,660 | 1,020,180 | 1,025,896 | 1,023,083 | 1,036,839 | 1,016,077 | 1,010,750 | 1,006,891 | 1,000,389 | 1,000,000 |
| EATON VANCE Index: Bloomberg South Carolina Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg South Carolina Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,938 | 12,838 | 12,720 | 12,511 | 12,526 | 12,685 | 12,622 | 12,606 | 12,694 | 12,380 | 11,622 | 11,705 | 12,105 | 12,330 | 12,272 | 12,136 | 12,180 | 12,227 | 11,995 | 12,253 | 11,897 | 11,839 | 11,312 | 11,442 | 11,924 | 12,146 | 11,851 | 12,102 | 11,969 | 12,308 | 12,720 | 12,783 | 13,088 | 13,063 | 12,975 | 13,028 | 13,072 | 13,108 | 13,017 | 12,989 | 12,957 | 12,864 | 12,800 | 12,996 | 12,883 | 12,806 | 12,621 | 12,655 | 12,648 | 12,647 | 12,458 | 12,234 | 11,923 | 12,097 | 12,546 | 12,367 | 12,196 | 12,154 | 12,127 | 12,106 | 12,182 | 12,000 | 11,919 | 11,878 | 11,667 | 11,606 | 11,406 | 11,280 | 11,198 | 11,062 | 10,966 | 11,006 | 11,087 | 11,065 | 11,058 | 11,023 | 10,936 | 10,965 | 10,933 | 10,997 | 11,146 | 11,011 | 11,028 | 10,978 | 11,061 | 10,932 | 10,857 | 10,843 | 10,637 | 10,511 | 10,666 | 10,619 | 10,549 | 10,417 | 10,874 | 10,998 | 11,051 | 11,046 | 11,037 | 10,833 | 10,790 | 10,694 | 10,638 | 10,614 | 10,476 | 10,401 | 10,354 | 10,322 | 10,256 | 10,236 | 10,149 | 10,169 | 10,190 | 10,261 | 10,217 | 10,359 | 10,149 | 10,083 | 10,071 | 9,999 | 10,000 |
| EATON VANCE Index: Bloomberg South Carolina Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg South Carolina Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,938 | 12,838 | 12,720 | 12,511 | 12,526 | 12,685 | 12,622 | 12,606 | 12,694 | 12,380 | 11,622 | 11,705 | 12,105 | 12,330 | 12,272 | 12,136 | 12,180 | 12,227 | 11,995 | 12,253 | 11,897 | 11,839 | 11,312 | 11,442 | 11,924 | 12,146 | 11,851 | 12,102 | 11,969 | 12,308 | 12,720 | 12,783 | 13,088 | 13,063 | 12,975 | 13,028 | 13,072 | 13,108 | 13,017 | 12,989 | 12,957 | 12,864 | 12,800 | 12,996 | 12,883 | 12,806 | 12,621 | 12,655 | 12,648 | 12,647 | 12,458 | 12,234 | 11,923 | 12,097 | 12,546 | 12,367 | 12,196 | 12,154 | 12,127 | 12,106 | 12,182 | 12,000 | 11,919 | 11,878 | 11,667 | 11,606 | 11,406 | 11,280 | 11,198 | 11,062 | 10,966 | 11,006 | 11,087 | 11,065 | 11,058 | 11,023 | 10,936 | 10,965 | 10,933 | 10,997 | 11,146 | 11,011 | 11,028 | 10,978 | 11,061 | 10,932 | 10,857 | 10,843 | 10,637 | 10,511 | 10,666 | 10,619 | 10,549 | 10,417 | 10,874 | 10,998 | 11,051 | 11,046 | 11,037 | 10,833 | 10,790 | 10,694 | 10,638 | 10,614 | 10,476 | 10,401 | 10,354 | 10,322 | 10,256 | 10,236 | 10,149 | 10,169 | 10,190 | 10,261 | 10,217 | 10,359 | 10,149 | 10,083 | 10,071 | 9,999 | 10,000 |
| EATON VANCE Index: Bloomberg South Carolina Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg South Carolina Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,293,783 | 1,283,818 | 1,272,038 | 1,251,096 | 1,252,633 | 1,268,496 | 1,262,238 | 1,260,642 | 1,269,407 | 1,237,966 | 1,162,236 | 1,170,541 | 1,210,531 | 1,233,028 | 1,227,215 | 1,213,633 | 1,217,984 | 1,222,684 | 1,199,457 | 1,225,319 | 1,189,683 | 1,183,898 | 1,131,167 | 1,144,236 | 1,192,411 | 1,214,583 | 1,185,121 | 1,210,196 | 1,196,923 | 1,230,798 | 1,272,036 | 1,278,288 | 1,308,799 | 1,306,297 | 1,297,472 | 1,302,848 | 1,307,220 | 1,310,809 | 1,301,662 | 1,298,899 | 1,295,716 | 1,286,374 | 1,279,957 | 1,299,615 | 1,288,342 | 1,280,623 | 1,262,051 | 1,265,454 | 1,264,842 | 1,264,750 | 1,245,770 | 1,223,400 | 1,192,341 | 1,209,684 | 1,254,574 | 1,236,668 | 1,219,594 | 1,215,361 | 1,212,741 | 1,210,596 | 1,218,197 | 1,199,999 | 1,191,875 | 1,187,828 | 1,166,651 | 1,160,609 | 1,140,650 | 1,128,035 | 1,119,775 | 1,106,218 | 1,096,642 | 1,100,568 | 1,108,730 | 1,106,484 | 1,105,807 | 1,102,317 | 1,093,616 | 1,096,500 | 1,093,346 | 1,099,743 | 1,114,582 | 1,101,143 | 1,102,842 | 1,097,769 | 1,106,077 | 1,093,199 | 1,085,683 | 1,084,314 | 1,063,711 | 1,051,089 | 1,066,645 | 1,061,875 | 1,054,870 | 1,041,744 | 1,087,440 | 1,099,783 | 1,105,133 | 1,104,596 | 1,103,669 | 1,083,266 | 1,078,951 | 1,069,385 | 1,063,777 | 1,061,415 | 1,047,609 | 1,040,101 | 1,035,434 | 1,032,160 | 1,025,562 | 1,023,562 | 1,014,931 | 1,016,910 | 1,019,035 | 1,026,147 | 1,021,678 | 1,035,896 | 1,014,935 | 1,008,278 | 1,007,122 | 999,916 | 1,000,000 |
| EATON VANCE Index: Bloomberg Virginia Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Virginia Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,395 | 12,308 | 12,205 | 12,010 | 12,050 | 12,205 | 12,203 | 12,185 | 12,264 | 11,976 | 11,198 | 11,303 | 11,687 | 11,878 | 11,840 | 11,717 | 11,825 | 11,858 | 11,590 | 11,883 | 11,548 | 11,521 | 11,002 | 11,075 | 11,563 | 11,830 | 11,523 | 11,718 | 11,547 | 11,876 | 12,262 | 12,301 | 12,605 | 12,586 | 12,505 | 12,530 | 12,604 | 12,651 | 12,559 | 12,527 | 12,506 | 12,422 | 12,366 | 12,540 | 12,475 | 12,433 | 12,279 | 12,323 | 12,315 | 12,353 | 12,183 | 12,132 | 11,764 | 11,836 | 12,162 | 12,043 | 11,860 | 11,832 | 11,799 | 11,773 | 11,860 | 11,710 | 11,613 | 11,571 | 11,430 | 11,403 | 11,249 | 11,191 | 11,102 | 10,975 | 10,858 | 10,914 | 10,983 | 10,958 | 10,937 | 10,928 | 10,809 | 10,853 | 10,811 | 10,847 | 10,969 | 10,838 | 10,921 | 10,912 | 10,984 | 10,912 | 10,839 | 10,873 | 10,723 | 10,639 | 10,619 | 10,552 | 10,478 | 10,349 | 10,738 | 10,842 | 10,879 | 10,876 | 10,871 | 10,716 | 10,699 | 10,629 | 10,603 | 10,577 | 10,452 | 10,394 | 10,364 | 10,324 | 10,253 | 10,225 | 10,162 | 10,165 | 10,187 | 10,231 | 10,194 | 10,293 | 10,128 | 10,087 | 10,075 | 10,004 | 10,000 |
| EATON VANCE Index: Bloomberg Virginia Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Virginia Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 12,395 | 12,308 | 12,205 | 12,010 | 12,050 | 12,205 | 12,203 | 12,185 | 12,264 | 11,976 | 11,198 | 11,303 | 11,687 | 11,878 | 11,840 | 11,717 | 11,825 | 11,858 | 11,590 | 11,883 | 11,548 | 11,521 | 11,002 | 11,075 | 11,563 | 11,830 | 11,523 | 11,718 | 11,547 | 11,876 | 12,262 | 12,301 | 12,605 | 12,586 | 12,505 | 12,530 | 12,604 | 12,651 | 12,559 | 12,527 | 12,506 | 12,422 | 12,366 | 12,540 | 12,475 | 12,433 | 12,279 | 12,323 | 12,315 | 12,353 | 12,183 | 12,132 | 11,764 | 11,836 | 12,162 | 12,043 | 11,860 | 11,832 | 11,799 | 11,773 | 11,860 | 11,710 | 11,613 | 11,571 | 11,430 | 11,403 | 11,249 | 11,191 | 11,102 | 10,975 | 10,858 | 10,914 | 10,983 | 10,958 | 10,937 | 10,928 | 10,809 | 10,853 | 10,811 | 10,847 | 10,969 | 10,838 | 10,921 | 10,912 | 10,984 | 10,912 | 10,839 | 10,873 | 10,723 | 10,639 | 10,619 | 10,552 | 10,478 | 10,349 | 10,738 | 10,842 | 10,879 | 10,876 | 10,871 | 10,716 | 10,699 | 10,629 | 10,603 | 10,577 | 10,452 | 10,394 | 10,364 | 10,324 | 10,253 | 10,225 | 10,162 | 10,165 | 10,187 | 10,231 | 10,194 | 10,293 | 10,128 | 10,087 | 10,075 | 10,004 | 10,000 |
| EATON VANCE Index: Bloomberg Virginia Municipal Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Virginia Municipal Bond Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 1,239,467 | $ 1,230,787 | $ 1,220,484 | $ 1,201,040 | $ 1,205,000 | $ 1,220,478 | $ 1,220,305 | $ 1,218,460 | $ 1,226,435 | $ 1,197,598 | $ 1,119,807 | $ 1,130,254 | $ 1,168,705 | $ 1,187,811 | $ 1,184,048 | $ 1,171,655 | $ 1,182,527 | $ 1,185,761 | $ 1,159,027 | $ 1,188,314 | $ 1,154,800 | $ 1,152,145 | $ 1,100,206 | $ 1,107,508 | $ 1,156,282 | $ 1,183,026 | $ 1,152,312 | $ 1,171,781 | $ 1,154,726 | $ 1,187,625 | $ 1,226,244 | $ 1,230,067 | $ 1,260,475 | $ 1,258,630 | $ 1,250,458 | $ 1,253,047 | $ 1,260,407 | $ 1,265,051 | $ 1,255,888 | $ 1,252,692 | $ 1,250,635 | $ 1,242,211 | $ 1,236,569 | $ 1,253,959 | $ 1,247,458 | $ 1,243,273 | $ 1,227,924 | $ 1,232,335 | $ 1,231,472 | $ 1,235,328 | $ 1,218,285 | $ 1,213,163 | $ 1,176,382 | $ 1,183,619 | $ 1,216,204 | $ 1,204,267 | $ 1,185,957 | $ 1,183,179 | $ 1,179,902 | $ 1,177,253 | $ 1,185,950 | $ 1,170,990 | $ 1,161,331 | $ 1,157,090 | $ 1,143,046 | $ 1,140,312 | $ 1,124,876 | $ 1,119,125 | $ 1,110,219 | $ 1,097,514 | $ 1,085,800 | $ 1,091,410 | $ 1,098,284 | $ 1,095,782 | $ 1,093,710 | $ 1,092,812 | $ 1,080,907 | $ 1,085,336 | $ 1,081,077 | $ 1,084,669 | $ 1,096,933 | $ 1,083,808 | $ 1,092,087 | $ 1,091,234 | $ 1,098,386 | $ 1,091,195 | $ 1,083,933 | $ 1,087,302 | $ 1,072,262 | $ 1,063,895 | $ 1,061,916 | $ 1,055,194 | $ 1,047,750 | $ 1,034,856 | $ 1,073,808 | $ 1,084,222 | $ 1,087,888 | $ 1,087,573 | $ 1,087,079 | $ 1,071,626 | $ 1,069,903 | $ 1,062,897 | $ 1,060,347 | $ 1,057,665 | $ 1,045,172 | $ 1,039,437 | $ 1,036,422 | $ 1,032,424 | $ 1,025,311 | $ 1,022,479 | $ 1,016,234 | $ 1,016,533 | $ 1,018,726 | $ 1,023,054 | $ 1,019,357 | $ 1,029,299 | $ 1,012,778 | $ 1,008,653 | $ 1,007,468 | $ 1,000,393 | $ 1,000,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | |
| C000013178 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.28% | 0.09% | 1.75% |
| C000013180 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 3.92% | (0.02%) | 1.49% |
| C000063956 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| C000013104 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.92% | 0.09% | 1.55% |
| C000013106 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 4.51% | (0.01%) | 1.28% |
| C000063947 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| C000013120 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.06% | (0.07%) | 1.74% |
| C000013122 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 3.76% | (0.15%) | 1.47% |
| C000092719 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| C000013136 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.50% | 0% | 1.60% |
| C000013138 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 4.10% | (0.07%) | 1.34% |
| C000063950 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| C000013142 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.67% | 0.01% | 1.85% |
| C000013144 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 4.18% | (0.06%) | 1.58% |
| C000092722 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| C000013151 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.04% | 0.18% | 1.82% |
| C000013153 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 3.71% | 0.11% | 1.53% |
| C000063952 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| C000013157 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A with Maximum Sales Charge | ||
| Average Annual Return, Percent | 2.62% | (0.17%) | 1.55% |
| C000013159 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C | ||
| Average Annual Return, Percent | 4.33% | (0.26%) | 1.28% |
| C000063953 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| Without Sales Load [Member] | C000013178 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.77% | 0.74% | 2.09% |
| Without Sales Load [Member] | C000013180 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 4.92% | (0.02%) | 1.49% |
| Without Sales Load [Member] | C000063956 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.97% | 0.93% | 2.29% |
| Without Sales Load [Member] | C000013104 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.34% | 0.74% | 1.89% |
| Without Sales Load [Member] | C000013106 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.51% | (0.01%) | 1.28% |
| Without Sales Load [Member] | C000063947 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.67% | 0.94% | 2.09% |
| Without Sales Load [Member] | C000013120 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.52% | 0.58% | 2.07% |
| Without Sales Load [Member] | C000013122 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 4.76% | (0.15%) | 1.47% |
| Without Sales Load [Member] | C000092719 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.73% | 0.78% | 2.27% |
| Without Sales Load [Member] | C000013136 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.98% | 0.67% | 1.94% |
| Without Sales Load [Member] | C000013138 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.10% | (0.07%) | 1.34% |
| Without Sales Load [Member] | C000063950 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.06% | 0.87% | 2.14% |
| Without Sales Load [Member] | C000013142 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.08% | 0.68% | 2.18% |
| Without Sales Load [Member] | C000013144 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.18% | (0.06%) | 1.58% |
| Without Sales Load [Member] | C000092722 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.16% | 0.87% | 2.38% |
| Without Sales Load [Member] | C000013151 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.50% | 0.86% | 2.15% |
| Without Sales Load [Member] | C000013153 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 4.71% | 0.11% | 1.53% |
| Without Sales Load [Member] | C000063952 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.72% | 1.04% | 2.34% |
| Without Sales Load [Member] | C000013157 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.12% | 0.50% | 1.88% |
| Without Sales Load [Member] | C000013159 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.33% | (0.26%) | 1.28% |
| Without Sales Load [Member] | C000063953 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.47% | 0.70% | 2.09% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| 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 | 6.09% | 1.02% | 2.42% |
| EATON VANCE Index: Bloomberg Georgia Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Georgia Municipal Bond Index | ||
| Average Annual Return, Percent | 6.52% | 1.02% | 2.23% |
| EATON VANCE Index: Bloomberg Georgia Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Georgia Municipal Bond Index | ||
| Average Annual Return, Percent | 6.52% | 1.02% | 2.23% |
| EATON VANCE Index: Bloomberg Georgia Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Georgia Municipal Bond Index | ||
| Average Annual Return, Percent | 6.52% | 1.02% | 2.23% |
| EATON VANCE Index: Bloomberg Maryland Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Maryland Municipal Bond Index | ||
| Average Annual Return, Percent | 5.36% | 0.70% | 1.97% |
| EATON VANCE Index: Bloomberg Maryland Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Maryland Municipal Bond Index | ||
| Average Annual Return, Percent | 5.36% | 0.70% | 1.97% |
| EATON VANCE Index: Bloomberg Maryland Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Maryland Municipal Bond Index | ||
| Average Annual Return, Percent | 5.36% | 0.70% | 1.97% |
| EATON VANCE Index: Bloomberg Missouri Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Missouri Municipal Bond Index | ||
| Average Annual Return, Percent | 6.46% | 1.15% | 2.50% |
| EATON VANCE Index: Bloomberg Missouri Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Missouri Municipal Bond Index | ||
| Average Annual Return, Percent | 6.46% | 1.15% | 2.50% |
| EATON VANCE Index: Bloomberg Missouri Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Missouri Municipal Bond Index | ||
| Average Annual Return, Percent | 6.46% | 1.15% | 2.50% |
| EATON VANCE Index: Bloomberg North Carolina Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg North Carolina Municipal Bond Index | ||
| Average Annual Return, Percent | 5.78% | 0.72% | 1.97% |
| EATON VANCE Index: Bloomberg North Carolina Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg North Carolina Municipal Bond Index | ||
| Average Annual Return, Percent | 5.78% | 0.72% | 1.97% |
| EATON VANCE Index: Bloomberg North Carolina Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg North Carolina Municipal Bond Index | ||
| Average Annual Return, Percent | 5.78% | 0.72% | 1.97% |
| EATON VANCE Index: Bloomberg Oregon Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||
| Average Annual Return, Percent | 5.98% | 0.76% | 2.28% |
| EATON VANCE Index: Bloomberg Oregon Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||
| Average Annual Return, Percent | 5.98% | 0.76% | 2.28% |
| EATON VANCE Index: Bloomberg Oregon Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||
| Average Annual Return, Percent | 5.98% | 0.76% | 2.28% |
| EATON VANCE Index: Bloomberg South Carolina Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg South Carolina Municipal Bond Index | ||
| Average Annual Return, Percent | 6.88% | 1.21% | 2.61% |
| EATON VANCE Index: Bloomberg South Carolina Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg South Carolina Municipal Bond Index | ||
| Average Annual Return, Percent | 6.88% | 1.21% | 2.61% |
| EATON VANCE Index: Bloomberg South Carolina Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg South Carolina Municipal Bond Index | ||
| Average Annual Return, Percent | 6.88% | 1.21% | 2.61% |
| EATON VANCE Index: Bloomberg Virginia Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Virginia Municipal Bond Index | ||
| Average Annual Return, Percent | 6.05% | 0.89% | 2.17% |
| EATON VANCE Index: Bloomberg Virginia Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Virginia Municipal Bond Index | ||
| Average Annual Return, Percent | 6.05% | 0.89% | 2.17% |
| EATON VANCE Index: Bloomberg Virginia Municipal Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Virginia Municipal Bond Index | ||
| Average Annual Return, Percent | 6.05% | 0.89% | 2.17% |
| Shareholder Report, Holdings (Details) | Aug. 31, 2024 |
| C000013178 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000013178 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000013178 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000013178 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.90% |
| C000013178 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60.80% |
| C000013178 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000013178 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000013178 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| C000013178 | Other Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013178 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000013178 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000013178 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000013178 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.60% |
| C000013178 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000013178 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000013178 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.70% |
| C000013178 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000013178 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.70% |
| C000013180 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000013180 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000013180 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000013180 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.90% |
| C000013180 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60.80% |
| C000013180 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000013180 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000013180 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| C000013180 | Other Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013180 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000013180 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000013180 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000013180 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.60% |
| C000013180 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000013180 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000013180 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.70% |
| C000013180 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000013180 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.70% |
| C000063956 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000063956 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000063956 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000063956 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.90% |
| C000063956 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60.80% |
| C000063956 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000063956 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000063956 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| C000063956 | Other Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000063956 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000063956 | Industrial Development Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000063956 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000063956 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.60% |
| C000063956 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000063956 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000063956 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.70% |
| C000063956 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000063956 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.70% |
| C000013104 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000013104 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000013104 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| C000013104 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.20% |
| C000013104 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.60% |
| C000013104 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000013104 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.40% |
| C000013104 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013104 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15% |
| C000013104 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.40% |
| C000013104 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| C000013104 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| C000013104 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.10% |
| C000013104 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.10% |
| C000013104 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000013106 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000013106 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000013106 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| C000013106 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.20% |
| C000013106 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.60% |
| C000013106 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000013106 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.40% |
| C000013106 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013106 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15% |
| C000013106 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.40% |
| C000013106 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| C000013106 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| C000013106 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.10% |
| C000013106 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.10% |
| C000013106 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000063947 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000063947 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000063947 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| C000063947 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.20% |
| C000063947 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.60% |
| C000063947 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000063947 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.40% |
| C000063947 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000063947 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15% |
| C000063947 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.40% |
| C000063947 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| C000063947 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| C000063947 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.10% |
| C000063947 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.10% |
| C000063947 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000013120 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000013120 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000013120 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000013120 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.60% |
| C000013120 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 62.10% |
| C000013120 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000013120 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000013120 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000013120 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000013120 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000013120 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000013120 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000013120 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.50% |
| C000013120 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.40% |
| C000013120 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 26% |
| C000013120 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000013120 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000013122 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000013122 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000013122 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000013122 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.60% |
| C000013122 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 62.10% |
| C000013122 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000013122 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000013122 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000013122 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000013122 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000013122 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000013122 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000013122 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.50% |
| C000013122 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.40% |
| C000013122 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 26% |
| C000013122 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000013122 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000092719 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000092719 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000092719 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000092719 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.60% |
| C000092719 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 62.10% |
| C000092719 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000092719 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000092719 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000092719 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000092719 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000092719 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000092719 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000092719 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.50% |
| C000092719 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.40% |
| C000092719 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 26% |
| C000092719 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000092719 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000013136 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000013136 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000013136 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000013136 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000013136 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 66% |
| C000013136 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000013136 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013136 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000013136 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000013136 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000013136 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.60% |
| C000013136 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.90% |
| C000013136 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000013136 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.30% |
| C000013136 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 24% |
| C000013136 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000013138 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000013138 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000013138 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000013138 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000013138 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 66% |
| C000013138 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000013138 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013138 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000013138 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000013138 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000013138 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.60% |
| C000013138 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.90% |
| C000013138 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000013138 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.30% |
| C000013138 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 24% |
| C000013138 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000063950 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000063950 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000063950 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000063950 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000063950 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 66% |
| C000063950 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000063950 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000063950 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000063950 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000063950 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000063950 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.60% |
| C000063950 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.90% |
| C000063950 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000063950 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.30% |
| C000063950 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 24% |
| C000063950 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000013142 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000013142 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000013142 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000013142 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000013142 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 75.50% |
| C000013142 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000013142 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000013142 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000013142 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000013142 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000013142 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.80% |
| C000013142 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.20% |
| C000013142 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000013142 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 43.60% |
| C000013142 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.20% |
| C000013144 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000013144 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000013144 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000013144 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000013144 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 75.50% |
| C000013144 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000013144 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000013144 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000013144 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000013144 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000013144 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.80% |
| C000013144 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.20% |
| C000013144 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000013144 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 43.60% |
| C000013144 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.20% |
| C000092722 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000092722 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000092722 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000092722 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000092722 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 75.50% |
| C000092722 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000092722 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.60% |
| C000092722 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000092722 | Special Tax Revenue | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000092722 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000092722 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.80% |
| C000092722 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.20% |
| C000092722 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000092722 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 43.60% |
| C000092722 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.20% |
| C000013151 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000013151 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000013151 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000013151 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000013151 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.20% |
| C000013151 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| C000013151 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.70% |
| C000013151 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013151 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000013151 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.60% |
| C000013151 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013151 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.10% |
| C000013151 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.90% |
| C000013151 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.80% |
| C000013151 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000013153 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000013153 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000013153 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000013153 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000013153 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.20% |
| C000013153 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| C000013153 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.70% |
| C000013153 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013153 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000013153 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.60% |
| C000013153 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000013153 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.10% |
| C000013153 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.90% |
| C000013153 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.80% |
| C000013153 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000063952 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000063952 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000063952 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000063952 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000063952 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.20% |
| C000063952 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| C000063952 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.70% |
| C000063952 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000063952 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000063952 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.60% |
| C000063952 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000063952 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.10% |
| C000063952 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.90% |
| C000063952 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.80% |
| C000063952 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000013157 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000013157 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000013157 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000013157 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000013157 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| C000013157 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.50% |
| C000013157 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000013157 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.40% |
| C000013157 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000013157 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.10% |
| C000013157 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000013157 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000013157 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.10% |
| C000013157 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.60% |
| C000013157 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.30% |
| C000013157 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.90% |
| C000013157 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000013157 | Bond Bank | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000013159 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000013159 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000013159 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000013159 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000013159 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| C000013159 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.50% |
| C000013159 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000013159 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.40% |
| C000013159 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000013159 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.10% |
| C000013159 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000013159 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000013159 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.10% |
| C000013159 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.60% |
| C000013159 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.30% |
| C000013159 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.90% |
| C000013159 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000013159 | Bond Bank | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000063953 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000063953 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000063953 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000063953 | A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000063953 | AA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.30% |
| C000063953 | AAA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.50% |
| C000063953 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000063953 | Industry Other Line | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.40% |
| C000063953 | Lease Rev./Cert. of Participation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000063953 | Housing | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.10% |
| C000063953 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000063953 | Education | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000063953 | Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.10% |
| C000063953 | Hospital | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.60% |
| C000063953 | General Obligations | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.30% |
| C000063953 | Water and Sewer | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.90% |
| C000063953 | Senior Living/Life Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000063953 | Bond Bank | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
