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John Hancock Multifactor Emerging Markets ETF Average Annual Total Returns
12 Months Ended 60 Months Ended 75 Months Ended
Apr. 30, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
MSCI Emerging Markets Index (reflects no deduction for fees, expenses, or taxes, except foreign withholding taxes on dividends)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   7.50% 1.70% 2.88%
John Hancock Dimensional Emerging Markets Index (reflects no deduction for fees, expenses, or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   6.04% 3.45% 4.29%
N/A        
Prospectus [Line Items]        
Average Annual Return, Percent   4.75% 2.20% 3.19%
Performance Inception Date Sep. 27, 2018      
N/A | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   4.27% 1.73% 2.69%
N/A | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   3.55% 1.82% 2.55%