First Trust Water ETF Expense Example, No Redemption - First Trust Water ETF - First Trust Water ETF |
Dec. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 51 |
| Expense Example, No Redemption, 3 Years | 160 |
| Expense Example, No Redemption, 5 Years | 280 |
| Expense Example, No Redemption, 10 Years | $ 628 |