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Derivative Instruments - Summary of Average Monthly Notional Value of Future Contracts Held (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Weighted Average [Member] | Commodity Futures Contract [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Average Notional Value | $ 1,569,210,331 | $ 2,084,083,410 | $ 1,654,291,339 | $ 2,202,359,246

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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