CONDENSED SCHEDULES OF INVESTMENTS (Parenthetical) - Man-AHL Diversified Trading Company L.P. [Member] - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Investment Holdings [Line Items]
Premiums received on credit default swap agreements	$ 11,296	$ 170,833
Premiums paid on credit default swap agreements	648,666	7,177,944
Net unrealized trading gains/(losses) on open contracts/agreements, Fair Value	$ 10,242,114	$ 8,874,832
Net unrealized trading gains/(losses) on open contracts/agreements, Percent of Partners' Capital	8.10%	7.70%
Cost of investment	$ 79,851,554	$ 79,538,940
US Government Securities - Long [Member]
Investment Holdings [Line Items]
Cost of investment	79,851,554	79,538,940
Credit Default Swaps - Buy Protection [Member] | Swap Agreements - Long [Member]
Investment Holdings [Line Items]
Premiums received on credit default swap agreements	11,296	170,833
Credit Default Swaps - Sell Protection [Member] | Swap Agreements - Short [Member]
Investment Holdings [Line Items]
Premiums paid on credit default swap agreements	$ 648,666	$ 7,177,944