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GMO Resource Transition Fund Average Annual Total Returns - Class VI
 12 Months Ended 35 Months Ended 60 Months Ended 120 Months Ended
Feb. 28, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Prospectus [Line Items]          
Average Annual Return, Percent   47.39% (3.56%)
Performance Inception Date Feb. 15, 2023        
After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   45.67% (4.63%)
After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   28.38% (2.96%)
MSCI ACWI Commodity Producers ex-Energy Index (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]   63.40% 12.88%    
MSCI ACWI (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]   22.34% 18.45%    
[1] MSCI data may not be reproduced or used for any other purpose. MSCI provides no warranties, has not prepared or approved this report, and has no liability hereunder.