Expense Example, No Redemption - First Trust Indxx Critical Metals ETF - First Trust Indxx Critical Metals ETF |
Oct. 30, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 66 |
| Expense Example, No Redemption, 3 Years | $ 208 |