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Derivative Instruments - Summary of Average Monthly Notional Value of Future Contracts Held (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Weighted Average [Member] | Commodity Futures Contract [Member]        
Derivative [Line Items]        
Average Notional Value $ 706,911,949 $ 834,991,570 $ 730,235,371 $ 903,993,000