Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 684,890,002	$ 784,350,648
Exchange-Traded Fund	215,106,065	215,381,398
Money Market Mutual Fund	831,551,651	692,738,727
Total Investments in Securities	1,731,547,718	1,692,470,773
Commodity Futures Contracts, Appreciation	107,852,661	13,652,359
Commodity Futures Contracts, Depreciation	(44,850,146)	(44,215,202)
Commodity Futures Contracts	63,002,515	(30,562,843)
Total Investments	1,794,550,233	1,661,907,930
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	215,106,065	215,381,398
Money Market Mutual Fund	831,551,651	692,738,727
Total Investments in Securities	1,046,657,716	908,120,125
Commodity Futures Contracts, Appreciation	107,852,661	13,652,359
Commodity Futures Contracts, Depreciation	(44,850,146)	(44,215,202)
Commodity Futures Contracts	63,002,515	(30,562,843)
Total Investments	1,109,660,231	877,557,282
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	684,890,002	784,350,648
Total Investments in Securities	684,890,002	784,350,648
Total Investments	$ 684,890,002	$ 784,350,648