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Significant Accounting Policies (Schedule Of Platinum Receivable And Payable) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Significant Accounting Policies [Abstract] |  |  |  |
Platinum receivable | $ 0 pplt_BullionReceivableAtMarketValue |  | $ 0 pplt_BullionReceivableAtMarketValue |
Platinum payable | $ 11,743 pplt_BullionPayableAtMarketValue | [1] | $ 13,259 pplt_BullionPayableAtMarketValue | [2]
[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.
[2] | Derived from audited Statement of Financial Condition as of December 31, 2013. The amounts are those previously reported under non-investment company accounting. Refer to Note 2.1 for additional information.

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- Definition Amount of bullion payable at market value as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | pplt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of bullion receivable at market value as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | pplt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration