GMO U.S. Opportunistic Value Fund Annual Total Returns	12 Months Ended
GMO U.S. Opportunistic Value Fund Annual Total Returns	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
GMO U.S. Opportunistic Value Fund \| Class VI
Prospectus [Line Items]
Annual Return [Percent]	14.93%	13.09%	16.45%