Derivative Instruments - Effect of Derivative Instruments on Statements of Income and Expenses (Detail) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Futures contracts, net realized gain (loss)	$ (36,971,931)	$ 13,714,916	$ 43,466,990	$ 63,331,799
Futures contracts, net unrealized gain (loss)	7,516,207	(2,833,876)	(134,161,945)	(12,626,142)
Commodity Futures Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Futures contracts, net realized gain (loss)	(36,971,931)	13,714,916	43,466,990	63,331,799
Futures contracts, net unrealized gain (loss)	7,516,207	(2,833,876)	(134,161,945)	(12,626,142)
Future contracts, net realized and unrealized gain (loss)	$ (29,455,724)	$ 10,881,040	$ (90,694,955)	$ 50,705,657

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.

No definition available.

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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
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section S99
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-Subparagraph (SX 210.5-03.7(c),9(a))
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-Publisher FASB
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-Topic 230
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-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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- Definition

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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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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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.

+ References

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