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Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
United States Treasury Obligations $ 245,783,215 $ 342,956,644
Exchange-Traded Fund 119,729,280 119,734,949
Money Market Mutual Fund 402,174,495 248,080,509
Total Investments in Securities 767,686,990 710,772,102
Commodity Futures Contracts, Appreciation 78,321,049 15,443,843
Commodity Futures Contracts, Depreciation (29,019,736) (32,743,090)
Commodity Futures Contracts 49,301,313 (17,299,247)
Total Investments 816,988,303 693,472,855
Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Exchange-Traded Fund 119,729,280 119,734,949
Money Market Mutual Fund 402,174,495 248,080,509
Total Investments in Securities 521,903,775 367,815,458
Commodity Futures Contracts, Appreciation 78,321,049 15,443,843
Commodity Futures Contracts, Depreciation (29,019,736) (32,743,090)
Commodity Futures Contracts 49,301,313 (17,299,247)
Total Investments 571,205,088 350,516,211
Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
United States Treasury Obligations 245,783,215 342,956,644
Total Investments in Securities 245,783,215 342,956,644
Total Investments $ 245,783,215 $ 342,956,644