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Financial Highlights (USD $)
 12 Months Ended
Dec. 31, 2014
Per Share Performance (for a Share outstanding throughout the entire period)  
Net asset value per Share at beginning of year $ 118.14sgol_NetAssetValuePerShare [1]
Income from investment operations:  
Net investment loss $ (0.49)sgol_NetInvestmentIncomLossPerShare [1]
Total realized and unrealized gains or losses on investment in gold $ (0.19)sgol_NetRealizedAndUnrealizedGainsAndLossesOnInvestmentInBullionPerShare [1]
Change in net assets from operations $ (0.68)sgol_ChangeInNetAssetsFromOperationsPerShare [1]
Net asset value per Share at end of year $ 117.46sgol_NetAssetValuePerShare [1]
Weighted average number of shares 8,578,219us-gaap_WeightedAverageNumberOfSharesOutstandingBasic [1]
Expense Ratio  
Sponsor's fee per Share 0.39%sgol_AnnualizedRateOfSponsorsFee [1]
Net Investment Loss Ratio  
Net investment loss ratio (0.39%)sgol_AnnualizedNetInvestmentIncomeLossRatio [1]
Total Return (0.58%)sgol_NonAnnualizedTotalReturn [1]
[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.