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GMO High Yield Fund Annual Total Returns
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
GMO High Yield Fund | Class VI            
Prospectus [Line Items]            
Annual Return [Percent] 7.93% 12.95% (8.03%) 4.99% 5.47% 14.33%