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Significant Accounting Policies (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Significant Accounting Policies [Abstract]      
Bullion receivable at market value $ 3,080,000gltr_BullionReceivableAtMarketValue [1] $ 0gltr_BullionReceivableAtMarketValue  
Annualized rate of Sponsors Fee 0.60%gltr_AnnualizedRateOfSponsorsFee [1] 0.60%gltr_AnnualizedRateOfSponsorsFee  
Sponsor Fees 1,089,397us-gaap_SponsorFees 1,201,105us-gaap_SponsorFees 1,168,126us-gaap_SponsorFees
Fees payable to Sponsor $ 86,196us-gaap_AccountsPayableRelatedPartiesCurrent $ 116,992us-gaap_AccountsPayableRelatedPartiesCurrent  
[1] Effective January 1, 2014, the Trust has adopted the provisions of Topic 946, Investment Companies, and follows specialized accounting. Refer to Note 2.1 for additional information.