v3.25.2
First Trust Bloomberg R&D Leaders ETF Performance Management - First Trust Bloomberg R&D Leaders ETF
Mar. 31, 2025
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] <span style="color:#000000;font-family:Arial;font-size:9.90pt;font-weight:bold;">Performance</span>
Performance Narrative [Text Block] The Fund does not have performance information available for a full calendar year.
Performance One Year or Less [Text] <span style="font-family:Arial;font-size:9.00pt;">The Fund does not have performance information available for a full calendar year.</span>