Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 313,931,580	$ 666,431,938
Exchange-Traded Fund	73,681,342	73,590,524
Money Market Mutual Fund	241,738,038	909,560,064
Total Investments in Securities	629,350,960	1,649,582,526
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	1,617,241	(7,688,710)
Total Investments	630,968,201	1,641,893,816
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	73,681,342	73,590,524
Money Market Mutual Fund	241,738,038	909,560,064
Total Investments in Securities	313,931,580	666,431,938
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	1,617,241	(7,688,710)
Total Investments	313,931,580	666,431,938
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	313,931,580	666,431,938
Total Investments in Securities	315,419,380	983,150,588
Total Investments	$ 317,036,621	$ 975,461,878