Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 275,588,239	$ 203,008,216
Exchange-Traded Fund	89,158,085	89,221,438
Money Market Mutual Fund	1,498,260,698	738,422,201
Total Investments in Securities	1,863,007,022	1,030,651,855
Commodity Futures Contracts, Appreciation	123,079,809	37,970,303
Commodity Futures Contracts, Depreciation	(11,540,311)	(2,974,507)
Commodity Futures Contracts	111,539,498	34,995,796
Total Investments	1,974,546,520	1,065,647,651
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	89,158,085	89,221,438
Money Market Mutual Fund	1,498,260,698	738,422,201
Total Investments in Securities	1,587,418,783	827,643,639
Commodity Futures Contracts, Appreciation	123,079,809	37,970,303
Commodity Futures Contracts, Depreciation	(11,540,311)	(2,974,507)
Commodity Futures Contracts	111,539,498	34,995,796
Total Investments	1,698,958,281	862,639,435
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	275,588,239	203,008,216
Total Investments in Securities	275,588,239	203,008,216
Total Investments	$ 275,588,239	$ 203,008,216