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	$ 1,071,999,409	$ 1,272,386,571
Exchange-Traded Fund	141,505,177	141,250,406
Money Market Mutual Fund	1,002,772,527	1,284,100,134
Total Investments in Securities	2,216,277,113	2,697,737,111
Commodity Futures Contracts, Appreciation	75,719,153	83,629,274
Commodity Futures Contracts, Depreciation	(159,722,283)	(119,988,845)
Commodity Futures Contracts	(84,003,130)	36,359,571
Total Investments	2,132,273,983	2,661,377,540
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	141,505,177	141,250,406
Money Market Mutual Fund	1,002,772,527	1,284,100,134
Total Investments in Securities	1,144,277,704	1,425,350,540
Commodity Futures Contracts, Appreciation	75,719,153	83,629,274
Commodity Futures Contracts, Depreciation	(159,722,283)	(119,988,845)
Commodity Futures Contracts	(84,003,130)	36,359,571
Total Investments	1,071,999,409	1,388,990,969
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	1,071,999,409	1,272,386,571
Total Investments in Securities	1,071,999,409	1,272,386,571
Total Investments	$ 1,060,274,574	$ 1,272,386,571