Derivative Financial Instruments and Concentrations of Credit Risk - Schedule of Additional Disclosures Regarding Offsetting of Derivative Liabilities (Detail) - Man-AHL Diversified Trading Company L.P. [Member] - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	$ 19,653,792	$ 26,937,452
Gross Amount Offset in the Statements of Financial Condition, Liability	(19,446,010)	(26,937,452)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	207,782	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	207,782	0
Net Amount, Liability	0	0
Swap Agreements [Member] | Credit Suisse [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	101,334	0
Gross Amount Offset in the Statements of Financial Condition, Liability	(6,042)	0
Net Amounts of Liabilities Presented in the Statements of Financial Condition	95,292	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	95,292	0
Net Amount, Liability	0	0
Swap Agreements [Member] | Deutsche Bank [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities		2,877,261
Gross Amount Offset in the Statements of Financial Condition, Liability		(2,877,261)
Net Amounts of Liabilities Presented in the Statements of Financial Condition		0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability		0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged		0
Net Amount, Liability		0
Swap Agreements [Member] | Goldman Sachs [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	114,450	0
Gross Amount Offset in the Statements of Financial Condition, Liability	(1,960)	0
Net Amounts of Liabilities Presented in the Statements of Financial Condition	112,490	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	112,490	0
Net Amount, Liability	0	0
Swap Agreements [Member] | JPMorgan Chase [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	19,438,008	24,060,191
Gross Amount Offset in the Statements of Financial Condition, Liability	(19,438,008)	(24,060,191)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	0
Net Amount, Liability	0	0
Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	23,344,943	15,314,094
Gross Amount Offset in the Statements of Financial Condition, Liability	(23,344,943)	(12,744,510)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	2,569,584
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	2,569,584
Net Amount, Liability	0	0
Forward Contracts [Member] | Deutsche Bank [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	3,795,583	2,046,477
Gross Amount Offset in the Statements of Financial Condition, Liability	(3,795,583)	(1,704,868)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	341,609
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	341,609
Net Amount, Liability	0	0
Forward Contracts [Member] | JPMorgan Chase [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	9,189	230,023
Gross Amount Offset in the Statements of Financial Condition, Liability	(9,189)	(8,263)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	221,760
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	221,760
Net Amount, Liability	0	0
Forward Contracts [Member] | HSBC [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	10,851,225	8,096,070
Gross Amount Offset in the Statements of Financial Condition, Liability	(10,851,225)	(6,089,855)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	2,006,215
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	2,006,215
Net Amount, Liability	0	0
Forward Contracts [Member] | Royal Bank of Scotland [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	8,688,946	4,941,524
Gross Amount Offset in the Statements of Financial Condition, Liability	(8,688,946)	(4,941,524)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	0
Net Amount, Liability	0	0
Futures Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	2,380,496	1,827,864
Gross Amount Offset in the Statements of Financial Condition, Liability	(2,380,496)	(1,827,864)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	0
Net Amount, Liability	0	0
Futures Contracts [Member] | Credit Suisse [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	461,778	697,088
Gross Amount Offset in the Statements of Financial Condition, Liability	(461,778)	(697,088)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	0
Net Amount, Liability	0	0
Futures Contracts [Member] | JPMorgan Chase [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	398,525	501,233
Gross Amount Offset in the Statements of Financial Condition, Liability	(398,525)	(501,233)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	0
Net Amount, Liability	0	0
Futures Contracts [Member] | Bank of America Merrill Lynch [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	1,520,193	629,543
Gross Amount Offset in the Statements of Financial Condition, Liability	(1,520,193)	(629,543)
Net Amounts of Liabilities Presented in the Statements of Financial Condition	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Financial Instruments, Liability	0	0
Gross Amounts Not Offset in the Statements of Financial Condition, Cash Collateral Pledged	0	0
Net Amount, Liability	$ 0	$ 0