First Trust Dow Jones Select MicroCap Index Fund Expense Example, No Redemption - First Trust Dow Jones Select MicroCap Index Fund - First Trust Dow Jones Select MicroCap Index Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 61 |
| Expense Example, No Redemption, 3 Years | 203 |
| Expense Example, No Redemption, 5 Years | 357 |
| Expense Example, No Redemption, 10 Years | $ 806 |