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GMO International 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 World ex USA Value 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]   42.23% 31.06%    
MSCI World ex USA 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 [2]   31.85% 22.26%    
International Value ETF          
Prospectus [Line Items]          
Average Annual Return, Percent   45.54% 32.14%
Performance Inception Date Oct. 28, 2024        
International Value ETF | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   44.84% 31.47%
International Value ETF | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   27.86% 24.77%
[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.
[2] 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.