First Trust Long-Short Equity ETF Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 136 Months Ended | |
|---|---|---|---|---|---|
Oct. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| S&P 500® Index (reflects no deduction for fees, expenses or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.82% | 13.48% | |
| First Trust Long-Short Equity ETF | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 9.14% | 11.39% | 9.03% | 8.86% | |
| Performance Inception Date | Sep. 08, 2014 | ||||
| First Trust Long-Short Equity ETF | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 8.64% | 10.94% | 8.64% | 8.47% | |
| First Trust Long-Short Equity ETF | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 5.40% | 8.85% | 7.19% | 7.10% |