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GMO Resource Transition Fund Average Annual Total Returns
 12 Months Ended 23 Months Ended 60 Months Ended 120 Months Ended
Feb. 28, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
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]   (12.77%) (7.32%)    
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]   17.49% 16.42%    
Class VI          
Prospectus [Line Items]          
Average Annual Return, Percent   (26.24%) (23.08%)
Performance Inception Date Feb. 15, 2023        
Class VI | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   (26.83%) (23.91%)
Class VI | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   (15.35%) (17.06%)
[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.