First Trust NASDAQ-100 Ex-Technology Sector Index Fund Investment Objectives and Goals - First Trust NASDAQ-100 Ex-Technology Sector Index Fund |
Dec. 31, 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-100 Ex-Technology Sector Index Fund (QQXT)</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-100 Ex-Technology Sector Index Fund (the “Fund”) seeks investment results that correspond generally to the price and yield (before the Fund’s fees and expenses) of an equity index called the Nasdaq-100 Ex-Tech SectorTM Index (the “Index”). |