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Fund Expenses - Additional Information (Detail)
9 Months Ended
Jun. 30, 2017
Percentage of operating expenses annual fee of net asset value 0.50%
Sponsor [Member]  
Percentage of operating expenses annual fee of net asset value 0.33%
Gold Delivery Providers [Member]  
Percentage of operating expenses annual fee of net asset value 0.17%
SPDR Long Dollar Gold Trust [Member]  
Percentage of operating expenses annual fee of net asset value 0.50%
SPDR Long Dollar Gold Trust [Member] | Sponsor [Member]  
Percentage of operating expenses annual fee of net asset value 0.33%
SPDR Long Dollar Gold Trust [Member] | Gold Delivery Providers [Member]  
Percentage of operating expenses annual fee of net asset value 0.17%