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First Trust WCM International Equity ETF Average Annual Total Returns
12 Months Ended 60 Months Ended 69 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI ACWI ex-USA Index (reflects no deduction for fees, expenses or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   32.39% 7.91% 13.88%
First Trust WCM International Equity ETF        
Prospectus [Line Items]        
Average Annual Return, Percent   30.51% 8.23% 14.09%
Performance Inception Date Mar. 31, 2020      
First Trust WCM International Equity ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   30.10% 6.86% 12.73%
First Trust WCM International Equity ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   18.07% 5.90% 10.81%