Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
60 Months Ended |
108 Months Ended |
120 Months Ended |
Jan. 31, 2026 |
Jan. 31, 2026 |
Jan. 31, 2026 |
Jan. 31, 2026 |
| C000034229 |
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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 |
26.75%
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6.69%
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7.37%
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| C000034230 |
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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 |
31.82%
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7.05%
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7.30%
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| C000034231 |
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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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| C000142449 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class R6
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| C000086647 |
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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 |
21.89%
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6.44%
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7.78%
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| C000086649 |
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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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| C000161753 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class R
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| C000161754 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Class R6
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| C000177028 |
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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] | C000034229 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
33.75%
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7.85%
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7.95%
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| Without Sales Load [Member] | C000034230 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
32.82%
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7.05%
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7.30%
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| Without Sales Load [Member] | C000034231 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
34.01%
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8.12%
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8.22%
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| Without Sales Load [Member] | C000142449 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
34.14%
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8.21%
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8.29%
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| Without Sales Load [Member] | C000086647 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
28.67%
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7.60%
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8.37%
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| Without Sales Load [Member] | C000086649 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
28.94%
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7.85%
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8.63%
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| Without Sales Load [Member] | C000161753 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
28.35%
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7.31%
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8.09%
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| Without Sales Load [Member] | C000161754 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
28.95%
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7.88%
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8.66%
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| Without Sales Load [Member] | C000177028 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
12.13%
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10.85%
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8.93%
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| EATON VANCE Index: MSCI Emerging Markets |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI Emerging Markets Index
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| Average Annual Return, Percent |
42.84%
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5.34%
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10.07%
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| EATON VANCE Index: MSCI Emerging Markets |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI Emerging Markets Index
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| Average Annual Return, Percent |
42.84%
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5.34%
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10.07%
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| EATON VANCE Index: MSCI Emerging Markets |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI Emerging Markets Index
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| Average Annual Return, Percent |
42.84%
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5.34%
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10.07%
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| EATON VANCE Index: MSCI Emerging Markets |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI Emerging Markets Index
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| Average Annual Return, Percent |
42.84%
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5.34%
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10.07%
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| EATON VANCE Index: MSCI EAFE |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI EAFE Index
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| Average Annual Return, Percent |
31.18%
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10.27%
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9.55%
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| EATON VANCE Index: MSCI EAFE |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI EAFE Index
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| Average Annual Return, Percent |
31.18%
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10.27%
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9.55%
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| EATON VANCE Index: MSCI EAFE |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI EAFE Index
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| Average Annual Return, Percent |
31.18%
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10.27%
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9.55%
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| EATON VANCE Index: S&P 500 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index
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| Average Annual Return, Percent |
16.35%
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14.98%
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14.95%
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| EATON VANCE Index: MSCI EAFE |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI EAFE Index
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| Average Annual Return, Percent |
31.18%
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10.27%
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9.55%
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| EATON VANCE Index: Cboe S&P 500 BuyWrite IndexSM |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Cboe S&P 500 BuyWrite Index℠
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| Average Annual Return, Percent |
7.75%
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9.54%
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7.13%
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