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Significant Accounting Policies - Creations and Redemptions of Shares (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Activity in Number of Shares Created and Redeemed:
Creations			31,600,000	39,550,000
Redemptions			(17,050,000)	(10,950,000)
Net Change in Number of Shares Created and Redeemed			14,550,000	28,600,000
Activity in the Value of Shares Created and Redeemed
Creations	$ 404,959	$ 224,805	$ 1,201,343	$ 1,446,829
Redemptions	(178,669)	0	(614,538)	(393,149)
Net change in Value of Shares Created and Redeemed			$ 586,805	$ 1,053,680
SPDR Gold Mini Shares Trust [Member]
Activity in Number of Shares Created and Redeemed:
Creations			31,600,000	39,550,000
Redemptions			(17,050,000)	(10,950,000)
Net Change in Number of Shares Created and Redeemed			14,550,000	28,600,000
Activity in the Value of Shares Created and Redeemed
Creations	404,959	224,805	$ 1,201,343	$ 1,446,829
Redemptions	$ (178,669)	$ 0	(614,538)	(393,149)
Net change in Value of Shares Created and Redeemed			$ 586,805	$ 1,053,680

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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