Derivative Instruments - Effect of Derivative Instruments on Statements of Income and Expenses (Detail) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments Gain Loss [Line Items]
Futures contracts, realized gain (loss)	$ 880,614,273	$ 209,625,055	$ 1,001,799,752	$ 277,831,954
Futures contracts, unrealized gain (loss)	(802,970,450)	120,921,792	(153,270,926)	230,890,131
Commodity Futures Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative Instruments Gain Loss [Line Items]
Futures contracts, realized gain (loss)	880,614,273	209,625,055	1,001,799,752	277,831,954
Futures contracts, unrealized gain (loss)	(802,970,450)	120,921,792	(153,270,926)	230,890,131
Net Realized and Net Change in Unrealized Gain (Loss)	$ 77,643,823	$ 330,546,847	$ 848,528,826	$ 508,722,085

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of realized and unrealized gain (loss) on investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
-Paragraph 10
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-Publisher FASB
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The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell mineral resources, energy, and agricultural products at some future point held at each balance sheet date, that was included in earnings for the period.

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