v3.25.4
First Trust Low Duration Opportunities ETF Investment Objectives and Goals - First Trust Low Duration Opportunities ETF
Oct. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] <span style="font-family:Arial;font-size:12.60pt;font-weight:bold;">First Trust Low Duration Opportunities ETF (LMBS)</span>
Objective [Heading] <span style="color:#000000;font-family:Arial;font-size:9.90pt;font-weight:bold;">Investment Objectives</span>
Objective, Primary [Text Block] The First Trust Low Duration Opportunities ETF’s (the “Fund”) primary investment objective is to generate current income. The Fund's secondary investment objective is to provide capital appreciation.