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GMO U.S. Value ETF Average Annual Total Returns
 12 Months Ended 14 Months Ended 60 Months Ended 120 Months Ended
Feb. 28, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI USA Value Index (Gross) (returns reflect no deduction for fees or expenses or withholding tax on dividend reinvestments)[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   13.71% 8.55%    
MSCI USA Index (Gross) (returns reflect no deduction for fees or expenses or withholding tax on dividend reinvestments)[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   17.75% 16.40%    
U.S. Value ETF          
Prospectus [Line Items]          
Average Annual Return, Percent   14.82% 10.58%
Performance Inception Date Oct. 28, 2024        
U.S. Value ETF | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   14.26% 10.05%
U.S. Value ETF | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   9.14% 8.04%
[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.