Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 71 Months Ended | |
|---|---|---|---|---|
Jul. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| ICE BofA 3-Month U.S. Treasury Bill Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.18% | 3.17% | 2.77% | |
| S&P 500® Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.92% | |
| First Trust Equity Market Neutral ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 6.91% | 2.76% | 1.93% | |
| Performance Inception Date | Feb. 04, 2020 | |||
| First Trust Equity Market Neutral ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 5.61% | 2.06% | 1.34% | |
| First Trust Equity Market Neutral ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.08% | 1.82% | 1.23% |