v3.25.4
First Trust Indxx Innovative Transaction and Process ETF Expense Example, No Redemption - First Trust Indxx Innovative Transaction and Process ETF - First Trust Indxx Innovative Transaction and Process ETF
Sep. 30, 2025
USD ($)
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 66
Expense Example, No Redemption, 3 Years 208
Expense Example, No Redemption, 5 Years 362
Expense Example, No Redemption, 10 Years $ 810