Limited Partnership Agreement - Additional Information (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Man-AHL Diversified I L.P [Member] | |||||
| Limited Partners' Capital Account [Line Items] | |||||
| Period required for prior written notice by limited partners | 10 days | ||||
| Partnership dissolution date | Dec. 31, 2037 | ||||
| Percentage of investment by general partner | 1.01% | ||||
| Distributions declared | $ 0 | $ 0 | $ 0 | $ 0 | |
| Man-AHL Diversified I L.P [Member] | Maximum | |||||
| Limited Partners' Capital Account [Line Items] | |||||
| General partner investment amount | 500,000 | $ 500,000 | |||
| Man-AHL Diversified Trading Company L.P. [Member] | |||||
| Limited Partners' Capital Account [Line Items] | |||||
| Direct interest owned by General Partner | 0.00% | 0.00% | |||
| Period required for prior written notice by limited partners | 10 days | ||||
| Partnership dissolution date | Dec. 31, 2037 | ||||
| Distributions declared | $ 0 | $ 0 | $ 0 | $ 0 | |