First Trust Nasdaq Artificial Intelligence and Robotics ETF Investment Objectives and Goals - First Trust Nasdaq Artificial Intelligence and Robotics ETF |
Sep. 30, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | <span style="color:#000000;font-family:Arial;font-size:12.60pt;font-weight:bold;">First Trust Nasdaq Artificial Intelligence and Robotics ETF (ROBT)</span> |
| Objective [Heading] | <span style="color:#000000;font-family:Arial;font-size:9.90pt;font-weight:bold;">Investment Objective</span> |
| Objective, Primary [Text Block] | The First Trust Nasdaq Artificial Intelligence and Robotics ETF (the “Fund”) seeks investment results that correspond generally to the price and yield (before the Fund’s fees and expenses) of an index called the Nasdaq CTA Artificial Intelligence and RoboticsTM Index (the “Index”). |