v3.26.3
Derivative Financial Instruments and Concentrations of Credit Risk - Fair Value and Notional Amounts of Credit Default Swaps (Detail) - Man-AHL Diversified Trading Company L.P. [Member] - USD ($)
Sep. 30, 2026
Dec. 31, 2025
Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value $ (648,842) $ 348,240
Credit Default Swaps [Member] | Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value (648,842) 348,240
Credit default swaps, Notional Amount $ 332,218,500 $ 309,528,000
Credit Default Swaps [Member] | Minimum [Member] | 1-5 Years [Member]    
Derivatives, Fair Value [Line Items]    
Derivative remaining maturity 1 year 1 year
Credit Default Swaps [Member] | Maximum [Member] | 1-5 Years [Member]    
Derivatives, Fair Value [Line Items]    
Derivative remaining maturity 5 years 5 years
Credit Default Swaps [Member] | Credit Spread in Basis Points 0-100 [Member]    
Derivatives, Fair Value [Line Items]    
Credit spread basis points, Minimum 0.00%  
Credit spread basis points, Maximum 100.00%  
Credit Default Swaps [Member] | Credit Spread in Basis Points 0-100 [Member] | Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value $ (180,678) $ 138,199
Credit default swaps, Notional Amount $ 243,907,250 244,272,000
Credit Default Swaps [Member] | Credit Spread in Basis Points 101-250 [Member]    
Derivatives, Fair Value [Line Items]    
Credit spread basis points, Minimum 101.00%  
Credit spread basis points, Maximum 250.00%  
Credit Default Swaps [Member] | Credit Spread in Basis Points 101-250 [Member] | Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value $ 0 144,195
Credit default swaps, Notional Amount $ 0 35,256,000
Credit Default Swaps [Member] | Credit Spread in Basis Points 251-350 [Member]    
Derivatives, Fair Value [Line Items]    
Credit spread basis points, Minimum 251.00%  
Credit spread basis points, Maximum 350.00%  
Credit Default Swaps [Member] | Credit Spread in Basis Points 251-350 [Member] | Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value $ (468,164) 65,846
Credit default swaps, Notional Amount $ 88,311,250 30,000,000
Credit Default Swaps [Member] | Credit Spread in Basis Points 351-450 [Member]    
Derivatives, Fair Value [Line Items]    
Credit spread basis points, Minimum 351.00%  
Credit spread basis points, Maximum 450.00%  
Credit Default Swaps [Member] | Credit Spread in Basis Points 351-450 [Member] | Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value $ 0 0
Credit default swaps, Notional Amount $ 0 0
Credit Default Swaps [Member] | Credit Spread in Basis Points 451+ [Member]    
Derivatives, Fair Value [Line Items]    
Credit spread basis points, Minimum 451.00%  
Credit Default Swaps [Member] | Credit Spread in Basis Points 451+ [Member] | Swap Agreements - Short [Member]    
Derivatives, Fair Value [Line Items]    
Credit default swaps, Fair Value $ 0 0
Credit default swaps, Notional Amount $ 0 $ 0