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	$ 679,086,621	$ 622,017,111
Exchange-Traded Fund	192,723,745	192,860,687
Money Market Mutual Fund	3,109,688,290	1,811,356,075
Total Investments in Securities	3,981,498,656	2,626,233,873
Commodity Futures Contracts, Appreciation	817,235,195	166,506,279
Commodity Futures Contracts, Depreciation	(4,166,897)	(3,137,505)
Commodity Futures Contracts	813,068,298	163,368,774
Total Investments	4,794,566,954	2,789,602,647
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	192,723,745	192,860,687
Money Market Mutual Fund	3,109,688,290	1,811,356,075
Total Investments in Securities	3,302,412,035	2,004,216,762
Commodity Futures Contracts, Appreciation	817,235,195	166,506,279
Commodity Futures Contracts, Depreciation	(4,166,897)	(3,137,505)
Commodity Futures Contracts	813,068,298	163,368,774
Total Investments	4,115,480,333	2,167,585,536
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	679,086,621	622,017,111
Total Investments in Securities	679,086,621	622,017,111
Total Investments	$ 679,086,621	$ 622,017,111