First Trust Energy AlphaDEX Fund Expense Example, No Redemption - First Trust Energy AlphaDEX Fund - First Trust Energy AlphaDEX Fund |
Jul. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 64 |
| Expense Example, No Redemption, 3 Years | 202 |
| Expense Example, No Redemption, 5 Years | 351 |
| Expense Example, No Redemption, 10 Years | $ 786 |