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Significant Accounting Policies (Narrative) (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Significant Accounting Policies [Abstract]        
Platinum receivable $ 0     $ 0
Platinum payable     0 0
Annualized rate of Sponsors Fee 0.60% [1]      
Sponsor Fees 753,558 821,098    
Fees payable to Sponsor $ 254,423     $ 260,849
[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.