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Australian Dollar Deposits - Additional Information (Detail)	9 Months Ended			12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 AUD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 AUD ($)	Sep. 30, 2023 AUD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 AUD ($)
Cash and Cash Equivalents [Abstract]
Annual nominal rate	1.67%				1.67%
Principal deposits	$ 6,690,122	$ 9,898,066	$ 14,455,898	$ 34,667,570
Principal redemptions	23,375,322	$ 24,745,165	$ 17,369,236	49,506,491
Cash paid for Sponsor's fee				$ 407,222
Deposits, interest bearing	$ 67,076,082				$ 103,929,695	$ 80,548,483	$ 118,776,794

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