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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 $ 1,569,210,331 $ 2,084,083,410 $ 1,654,291,339 $ 2,202,359,246