Derivative Instruments - Summary of Average Monthly and Quarterly Notional Value of Future Contracts Outstanding (Detail) - Weighted Average [Member] - Currency Futures Contract [Member] - USD ($)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Average Notional Value - Short	$ (15,807,436)	$ (21,597,528)
Average Notional Value - Long	$ 16,033,461	$ 15,684,463

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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