Average Annual Total Returns - Parametric Tax-Managed Emerging Markets Fund - Parametric Tax-Managed Emerging Markets Fund |
12 Months Ended | 60 Months Ended | 120 Months Ended | |
|---|---|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Prospectus [Line Items] | ||||
| Average Annual Return, Label [Optional Text] | Average Annual Total Return (for the calendar periods ended December 31, 2025) | |||
| MSCI Emerging Markets Index (reflects net dividends, which reflect the deduction of withholding taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 33.57% | 4.19% | 8.41% | |
| I | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 28.28% | 6.45% | 7.10% | |
| I | Return After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 26.78% | 4.94% | 6.24% | |
| I | Return After Taxes on Distributions and Sale of Fund Shares | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.63% | 4.89% | 5.76% |