v3.26.3
Derivative Financial Instruments and Concentrations of Credit Risk - Impact of Derivative Instruments on Statements of Operations (Detail) - Man-AHL Diversified Trading Company L.P. [Member] - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements $ 6,289,803 $ 11,501,146 $ 34,244,692 $ (6,231,752)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 5,041,085 5,018,726 (4,667,886) (1,143,227)
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (620,192) (851,667) 13,708,153 (3,498,854)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements (90,286) 1,367,906 (4,127,375) (7,816,183)
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Currencies [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (576,977) (381,804) 10,745,183 (2,259,011)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements (764,406) 738,355 (2,634,149) (7,933,532)
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Metals [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (43,215) (469,863) 2,962,970 (1,239,843)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 674,120 629,551 (1,493,226) 117,349
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements 6,367,996 10,009,409 19,889,316 (4,575,507)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 5,972,108 3,960,199 428,444 5,677,301
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member] | Currencies [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (17,231) (61,990) (81,457) 22,976
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 89,537 (138,235) 272,680 (213,474)
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member] | Metals [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (579,017) 785,059 2,011,931 3,408,728
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 281,765 3,492,708 (1,585,441) 3,486,909
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member] | Agricultural [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (4,140,720) 2,079,734 (5,289,870) 1,168,297
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 680,431 (258,215) (952,079) 287,616
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member] | Energy [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements 5,361,988 (16,805) 10,004,829 (4,317,474)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 1,230,244 364,229 471,364 292,308
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member] | Indices [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements (195,667) 8,774,413 7,049,543 3,000,983
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements (983,238) 536,192 (1,143,137) 2,911,862
Not Designated as Hedging Instrument [Member] | Futures Contracts [Member] | Interest Rates [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements 5,938,643 (1,551,002) 6,194,340 (7,859,017)
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements 4,673,369 (36,480) 3,365,057 (1,087,920)
Not Designated as Hedging Instrument [Member] | Swap Agreements [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements 553,183 2,265,392 563,638 1,561,012
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements (840,737) (309,379) (968,955) 995,655
Not Designated as Hedging Instrument [Member] | Swap Agreements [Member] | Credit Default Swaps [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net realized trading gains/(losses) on closed contracts/agreements 553,183 2,265,392 563,638 1,561,012
Net change in unrealized trading appreciation/(depreciation) on open contracts/agreements $ (840,737) $ (309,379) $ (968,955) $ 995,655