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Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)
Sep. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
United States Treasury Obligations $ 297,686,525 $ 342,956,644
Exchange-Traded Fund 119,797,308 119,734,949
Money Market Mutual Fund 333,671,112 248,080,509
Total Investments in Securities 751,154,945 710,772,102
Commodity Futures Contracts, Appreciation 51,783,948 15,443,843
Commodity Futures Contracts, Depreciation (22,898,448) (32,743,090)
Commodity Futures Contracts 28,885,500 (17,299,247)
Total Investments 780,040,445 693,472,855
Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Exchange-Traded Fund 119,797,308 119,734,949
Money Market Mutual Fund 333,671,112 248,080,509
Total Investments in Securities 453,468,420 367,815,458
Commodity Futures Contracts, Appreciation 51,783,948 15,443,843
Commodity Futures Contracts, Depreciation (22,898,448) (32,743,090)
Commodity Futures Contracts 28,885,500 (17,299,247)
Total Investments 482,353,920 350,516,211
Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
United States Treasury Obligations 297,686,525 342,956,644
Total Investments in Securities 297,686,525 342,956,644
Total Investments $ 297,686,525 $ 342,956,644