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Derivative Contract Information - Effect of Derivative Contracts on the Fund's Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2017		Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain/(loss) from Gold Delivery Agreement	$ (118)	[1]	$ (1,833)
SPDR Long Dollar Gold Trust [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain/(loss) from Gold Delivery Agreement	(118)	[1]	$ (1,833)
Over-the-Counter ("OTC") [Member] | Gold Delivery Agreement [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain/(loss) from Gold Delivery Agreement	(118)
Over-the-Counter ("OTC") [Member] | SPDR Long Dollar Gold Trust [Member] | Gold Delivery Agreement [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain/(loss) from Gold Delivery Agreement	$ (118)
[1] No comparative has been provided as operations commenced on January 27, 2017. See Note 1.

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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No definition available.

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