Shareholder Report, Average Annual Return (Details) |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2026 |
Jun. 30, 2026 |
|
| C000006391 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| Without Sales Load [Member] | C000006391 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 23.91% | 6.45% | 7.17% |
| EATON VANCE Index: MSCI Emerging Markets | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MSCI Emerging Markets Index | ||
| Average Annual Return, Percent | 43.51% | 7.19% | 10.07% |