Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 149 Months Ended | |
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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% | 2.18% | 1.76% | |
| 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% | 13.87% | |
| First Trust Managed Futures Strategy Fund | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 4.04% | 4.31% | 1.56% | 1.32% | |
| Performance Inception Date | Aug. 01, 2013 | ||||
| First Trust Managed Futures Strategy Fund | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 1.73% | 2.89% | 0.72% | 0.56% | |
| First Trust Managed Futures Strategy Fund | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 2.37% | 2.71% | 0.83% | 0.67% |