Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
60 Months Ended |
120 Months Ended |
Jul. 31, 2026 |
Jul. 31, 2026 |
Jul. 31, 2026 |
| C000013133 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class A with Maximum Sales Charge
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| Average Annual Return, Percent |
3.00%
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0.01%
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1.46%
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| C000013135 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class C
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| Average Annual Return, Percent |
4.79%
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(0.08%)
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1.05%
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| C000092720 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class I
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| C000013173 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class A with Maximum Sales Charge
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| Average Annual Return, Percent |
3.06%
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0.22%
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1.46%
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| C000013172 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class C
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| Average Annual Return, Percent |
4.88%
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0.14%
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1.03%
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| C000063955 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class I
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| C000013114 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class A with Maximum Sales Charge
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| Average Annual Return, Percent |
3.18%
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(0.18%)
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1.15%
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| C000013116 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class C
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| Average Annual Return, Percent |
4.87%
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(0.25%)
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0.75%
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| C000092718 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class I
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| C000100969 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class A with Maximum Sales Charge
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| Average Annual Return, Percent |
3.35%
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0.05%
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1.61%
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| C000100970 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class C
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| Average Annual Return, Percent |
5.05%
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(0.06%)
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1.17%
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| C000100971 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class I
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| C000013127 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class A with Maximum Sales Charge
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| Average Annual Return, Percent |
3.03%
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(0.65%)
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1.53%
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| C000013129 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class C
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| Average Annual Return, Percent |
4.74%
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(0.72%)
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1.11%
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| C000063948 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class I
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| C000013145 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class A with Maximum Sales Charge
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| Average Annual Return, Percent |
3.62%
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(0.33%)
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1.21%
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| C000013147 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class C
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| Average Annual Return, Percent |
5.37%
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(0.40%)
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0.80%
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| C000063951 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class I
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| Without Sales Load [Member] | C000013133 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.47%
|
0.66%
|
1.80%
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| Without Sales Load [Member] | C000013135 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.79%
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(0.08%)
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1.05%
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| Without Sales Load [Member] | C000092720 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.80%
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0.89%
|
2.02%
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| Without Sales Load [Member] | C000013173 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.55%
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0.88%
|
1.79%
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| Without Sales Load [Member] | C000013172 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.88%
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0.14%
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1.03%
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| Without Sales Load [Member] | C000063955 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.76%
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1.08%
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1.99%
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| Without Sales Load [Member] | C000013114 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.68%
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0.48%
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1.49%
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| Without Sales Load [Member] | C000013116 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.87%
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(0.25%)
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0.75%
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| Without Sales Load [Member] | C000092718 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.90%
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0.68%
|
1.69%
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| Without Sales Load [Member] | C000100969 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.84%
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0.71%
|
1.94%
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| Without Sales Load [Member] | C000100970 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.05%
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(0.06%)
|
1.17%
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| Without Sales Load [Member] | C000100971 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
7.10%
|
0.94%
|
2.19%
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| Without Sales Load [Member] | C000013127 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.54%
|
0.01%
|
1.87%
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| Without Sales Load [Member] | C000013129 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.74%
|
(0.72%)
|
1.11%
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| Without Sales Load [Member] | C000063948 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.62%
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0.20%
|
2.07%
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| Without Sales Load [Member] | C000013145 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
7.14%
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0.34%
|
1.55%
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| Without Sales Load [Member] | C000013147 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.37%
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(0.40%)
|
0.80%
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| Without Sales Load [Member] | C000063951 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
7.34%
|
0.55%
|
1.76%
|
| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
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1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
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1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
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1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
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1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
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1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
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1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
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0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
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| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
|
| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
|
| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
|
| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
|
| EATON VANCE Index: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index
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| Average Annual Return, Percent |
5.27%
|
0.51%
|
1.95%
|
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Arizona Municipal Bond Index
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| Average Annual Return, Percent |
4.84%
|
0.45%
|
1.80%
|
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Arizona Municipal Bond Index
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| Average Annual Return, Percent |
4.84%
|
0.45%
|
1.80%
|
| EATON VANCE Index: Bloomberg Arizona Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Arizona Municipal Bond Index
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| Average Annual Return, Percent |
4.84%
|
0.45%
|
1.80%
|
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Connecticut Municipal Bond Index
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| Average Annual Return, Percent |
3.66%
|
0.77%
|
1.98%
|
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Connecticut Municipal Bond Index
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| Average Annual Return, Percent |
3.66%
|
0.77%
|
1.98%
|
| EATON VANCE Index: Bloomberg Connecticut Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Connecticut Municipal Bond Index
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|
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| Average Annual Return, Percent |
3.66%
|
0.77%
|
1.98%
|
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index |
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| Average Annual Return [Line Items] |
|
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| Line Graph and Table Measure Name |
Bloomberg Minnesota Municipal Bond Index
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| Average Annual Return, Percent |
4.53%
|
0.41%
|
1.69%
|
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Minnesota Municipal Bond Index
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| Average Annual Return, Percent |
4.53%
|
0.41%
|
1.69%
|
| EATON VANCE Index: Bloomberg Minnesota Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Minnesota Municipal Bond Index
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|
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| Average Annual Return, Percent |
4.53%
|
0.41%
|
1.69%
|
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond |
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| Average Annual Return [Line Items] |
|
|
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| Line Graph and Table Measure Name |
Bloomberg New Jersey Municipal Bond Index
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|
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| Average Annual Return, Percent |
5.25%
|
0.79%
|
2.69%
|
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond |
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| Average Annual Return [Line Items] |
|
|
|
| Line Graph and Table Measure Name |
Bloomberg New Jersey Municipal Bond Index
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|
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| Average Annual Return, Percent |
5.25%
|
0.79%
|
2.69%
|
| EATON VANCE Index: Bloomberg New Jersey Municipal Bond |
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| Average Annual Return [Line Items] |
|
|
|
| Line Graph and Table Measure Name |
Bloomberg New Jersey Municipal Bond Index
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|
|
| Average Annual Return, Percent |
5.25%
|
0.79%
|
2.69%
|
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index |
|
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| Average Annual Return [Line Items] |
|
|
|
| Line Graph and Table Measure Name |
Bloomberg Pennsylvania Municipal Bond Index
|
|
|
| Average Annual Return, Percent |
5.50%
|
0.52%
|
2.15%
|
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index |
|
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| Average Annual Return [Line Items] |
|
|
|
| Line Graph and Table Measure Name |
Bloomberg Pennsylvania Municipal Bond Index
|
|
|
| Average Annual Return, Percent |
5.50%
|
0.52%
|
2.15%
|
| EATON VANCE Index: Bloomberg Pennsylvania Municipal Bond Index |
|
|
|
| Average Annual Return [Line Items] |
|
|
|
| Line Graph and Table Measure Name |
Bloomberg Pennsylvania Municipal Bond Index
|
|
|
| Average Annual Return, Percent |
5.50%
|
0.52%
|
2.15%
|