v3.25.2
First Trust S-Network E-Commerce ETF Expense Example, No Redemption - First Trust S-Network E-Commerce ETF - First Trust S-Network E-Commerce ETF
Mar. 31, 2025
USD ($)
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 61
Expense Example, No Redemption, 3 Years 192
Expense Example, No Redemption, 5 Years 335
Expense Example, No Redemption, 10 Years $ 750