Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 393,253,144	$ 784,350,648
Exchange-Traded Fund	215,371,200	215,381,398
Money Market Mutual Fund	661,273,167	692,738,727
Total Investments in Securities	1,269,897,511	1,692,470,773
Commodity Futures Contracts, Appreciation	27,889,813	13,652,359
Commodity Futures Contracts, Depreciation	(48,470,858)	(44,215,202)
Commodity Futures Contracts	(20,581,045)	(30,562,843)
Total Investments	1,249,316,466	1,661,907,930
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	215,371,200	215,381,398
Money Market Mutual Fund	661,273,167	692,738,727
Total Investments in Securities	876,644,367	908,120,125
Commodity Futures Contracts, Appreciation	27,889,813	13,652,359
Commodity Futures Contracts, Depreciation	(48,470,858)	(44,215,202)
Commodity Futures Contracts	(20,581,045)	(30,562,843)
Total Investments	856,063,322	877,557,282
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	393,253,144	784,350,648
Total Investments in Securities	393,253,144	784,350,648
Total Investments	$ 393,253,144	$ 784,350,648