GMO Global Developed Equity Allocation Fund Average Annual Total Returns - Class III |
12 Months Ended | 60 Months Ended | 120 Months Ended | 247 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|---|
Feb. 28, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | [1] | 28.39% | 12.19% | 11.23% | 8.31% | ||||
| Performance Inception Date | Jun. 16, 2005 | ||||||||
| After Taxes on Distributions | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | [1] | 26.68% | 10.00% | 9.62% | 6.88% | ||||
| After Taxes on Distributions and Sales | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | [1] | 17.34% | 8.92% | 8.68% | 6.49% | ||||
| MSCI World Index (Fund benchmark) (returns reflect no deduction for fees or expenses, but are net of withholding tax on dividend reinvestments)[Member] | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | [1],[2] | 21.09% | 12.15% | 12.17% | 8.76% | ||||
| |||||||||