v3.26.1
Average Annual Total Returns
12 Months Ended 60 Months Ended 65 Months Ended
Aug. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   18.56% 15.32% 17.66%
Russell 1000® Index (reflects no deduction for fees, expenses or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   17.37% 13.59% 15.90%
First Trust Active Factor Large Cap Growth ETF        
Prospectus [Line Items]        
Average Annual Return, Percent   17.13% 8.10% 11.28%
Performance Inception Date Jul. 21, 2020      
First Trust Active Factor Large Cap Growth ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   17.13% 8.10% 11.26%
First Trust Active Factor Large Cap Growth ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   10.14% 6.39% 9.02%