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John Hancock Multifactor Emerging Markets ETF Average Annual Total Returns
12 Months Ended 60 Months Ended 87 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
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   33.57% 4.20% 6.65%
John Hancock Dimensional Emerging Markets Index (reflects no deduction for fees, expenses, or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   30.74% 6.38% 7.58%
None or SAME        
Prospectus [Line Items]        
Average Annual Return, Percent   29.38% 5.12% 6.45%
Performance Inception Date Sep. 27, 2018      
None or SAME | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   29.02% 4.62% 5.96%
None or SAME | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   18.29% 4.04% 5.14%