First Trust NASDAQ Clean Edge Green Energy Index Fund Expense Example, No Redemption - First Trust NASDAQ Clean Edge Green Energy Index Fund - First Trust NASDAQ Clean Edge Green Energy Index Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 60 |
| Expense Example, No Redemption, 3 Years | 189 |
| Expense Example, No Redemption, 5 Years | 329 |
| Expense Example, No Redemption, 10 Years | $ 738 |