v3.25.4
First Trust RBA Deglobalization ETF Expense Example, No Redemption - First Trust RBA Deglobalization ETF - First Trust RBA Deglobalization ETF
Sep. 30, 2025
USD ($)
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 72
Expense Example, No Redemption, 3 Years 224
Expense Example, No Redemption, 5 Years 390
Expense Example, No Redemption, 10 Years $ 871