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GMO-Usonian Japan Value Creation Fund Annual Total Returns
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
GMO-Usonian Japan Value Creation Fund | Class VI          
Prospectus [Line Items]          
Annual Return [Percent] 31.59% 8.29% 21.81% (12.73%) 0.73%