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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 $ 132.59pplt_NetAssetValuePerShare [1]
Income from investment operations:  
Net investment loss $ (0.81)pplt_NetInvestmentIncomLossPerShare [1]
Total realized and unrealized gains or losses on investment in platinum $ (14.35)pplt_NetRealizedAndUnrealizedGainsAndLossesOnInvestmentInBullionPerShare [1]
Change in net assets from operations $ (15.16)pplt_ChangeInNetAssetsFromOperationsPerShare [1]
Net asset value per Share at end of year $ 117.43pplt_NetAssetValuePerShare [1]
Weighted average number of shares 5,400,822us-gaap_WeightedAverageNumberOfSharesOutstandingBasic [1]
Expense Ratio  
Sponsor's fee per Share 0.60%pplt_AnnualizedRateOfSponsorsFee [1]
Net Investment Loss Ratio  
Net investment loss ratio (0.60%)pplt_AnnualizedNetInvestmentIncomeLossRatio [1]
Total Return (11.43%)pplt_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.