Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 566,383,520	$ 666,431,938
Exchange-Traded Fund	73,723,258	73,590,524
Money Market Mutual Fund	486,113,068	909,560,064
Total Investments in Securities	1,126,219,846	1,649,582,526
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	(32,013,149)	(7,688,710)
Total Investments	1,094,206,697	1,641,893,816
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	73,723,258	73,590,524
Money Market Mutual Fund	486,113,068	909,560,064
Total Investments in Securities	559,836,326	983,150,588
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	(32,013,149)	(7,688,710)
Total Investments	527,823,177	975,461,878
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	566,383,520	666,431,938
Total Investments in Securities	566,383,520	666,431,938
Total Investments	$ 566,383,520	$ 666,431,938