Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 784,350,648	$ 1,272,386,571
Exchange-Traded Fund	215,381,398	141,250,406
Money Market Mutual Fund	692,738,727	1,284,100,134
Total Investments in Securities	1,692,470,773	2,697,737,111
Commodity Futures Contracts, Appreciation	13,652,359	83,629,274
Commodity Futures Contracts, Depreciation	(44,215,202)	(119,988,845)
Commodity Futures Contracts	(30,562,843)	(36,359,571)
Total Investments	1,661,907,930	2,661,377,540
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	215,381,398	141,250,406
Money Market Mutual Fund	692,738,727	1,284,100,134
Total Investments in Securities	908,120,125	1,425,350,540
Commodity Futures Contracts, Appreciation	13,652,359	83,629,274
Commodity Futures Contracts, Depreciation	(44,215,202)	(119,988,845)
Commodity Futures Contracts	(30,562,843)	(36,359,571)
Total Investments	877,557,282	1,388,990,969
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	784,350,648	1,272,386,571
Total Investments in Securities	784,350,648	1,272,386,571
Total Investments	$ 784,350,648	$ 1,272,386,571