GMO Asset Allocation Bond Fund Average Annual Total Returns - Class VI |
12 Months Ended | 60 Months Ended | 120 Months Ended | 201 Months Ended | |
|---|---|---|---|---|---|
Feb. 28, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 8.82% | (2.13%) | 1.07% | 1.73% | |
| Performance Inception Date | Mar. 18, 2009 | ||||
| After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 7.65% | (3.33%) | (0.04%) | 0.39% | |
| After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 5.22% | (2.09%) | 0.36% | 0.80% | |
| FTSE 3-Month Treasury Bill Index (Fund benchmark) (returns reflect no deduction for fees, expenses, or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 4.40% | 3.31% | 2.23% | 1.35% | |
| Bloomberg U.S. Aggregate Index (reflects no deduction for fees, expenses, or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% | 2.90% |