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Financial Highlights (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Per Share Performance (for a Share outstanding throughout the entire period)    
Net asset value per Share at beginning of year $ 61.60gltr_NetAssetValuePerShare $ 65.91gltr_NetAssetValuePerShare
Income from investment operations:    
Net investment loss $ (0.09)gltr_NetInvestmentIncomLossPerShare $ (0.10)gltr_NetInvestmentIncomLossPerShare
Total realized and unrealized gains and losses on investment in Bullion $ (0.41)gltr_NetRealizedAndUnrealizedGainsAndLossesOnInvestmentInBullionPerShare $ 3.79gltr_NetRealizedAndUnrealizedGainsAndLossesOnInvestmentInBullionPerShare
Change in net assets from operations $ (0.50)gltr_ChangeInNetAssetsFromOperationsPerShare $ 3.69gltr_ChangeInNetAssetsFromOperationsPerShare
Net asset value per Share at end of year $ 61.10gltr_NetAssetValuePerShare $ 69.60gltr_NetAssetValuePerShare
Weighted average number of shares 3,007,222us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 3,020,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Expense Ratio    
Sponsor's fee per Share 0.60%gltr_AnnualizedRateOfSponsorsFee 0.60%gltr_AnnualizedRateOfSponsorsFee
Net Investment Loss Ratio    
Net investment loss ratio (0.60%)gltr_AnnualizedNetInvestmentIncomeLossRatio (0.60%)gltr_AnnualizedNetInvestmentIncomeLossRatio
Total Return (0.81%)gltr_NonAnnualizedTotalReturn 5.60%gltr_NonAnnualizedTotalReturn