v3.25.4
First Trust Intermediate Duration Investment Grade Corporate ETF Investment Objectives and Goals - First Trust Intermediate Duration Investment Grade Corporate ETF
Oct. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] <span style="font-family:Arial;font-size:12.60pt;font-weight:bold;">First Trust Intermediate Duration Investment Grade Corporate ETF (FIIG)</span>
Objective [Heading] <span style="font-family:Arial;font-size:9.90pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block] The First Trust Intermediate Duration Investment Grade Corporate ETF’s (the “Fund”) investment objective is to deliver current income and long-term capital appreciation.