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Significant Accounting Policies (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Bullion [Line Items]
Basket of shares				50,000
Fair value transfers		$ 0		$ 0		$ 0
Bullion receivable		0		0		0
Bullion payable		0		0		0
Reserve for uncertain tax positions		$ 0		$ 0		0
Annualized rate of Sponsors Fee	[1]	0.60%	0.60%	0.60%	0.60%
Sponsor Fees		$ 547,217	$ 558,106	$ 1,086,993	$ 1,119,811
Fees payable to Sponsor		187,764		187,764		$ 183,974
All other expenses		$ 0	$ 0	$ 0	$ 0
Silver [Member]
Bullion [Line Items]
Percentage of assets help by Zurich Sub-Custodian		0.00%		0.00%
Platinum [Member]
Bullion [Line Items]
Percentage of assets help by Zurich Sub-Custodian		1.60%		1.60%
Palladium [Member]
Bullion [Line Items]
Percentage of assets help by Zurich Sub-Custodian		1.61%		1.61%
Gold [Member]
Bullion [Line Items]
Percentage of assets help by Zurich Sub-Custodian		0.00%		0.00%
[1] Annualized for periods of less than one year.

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Fees paid to advisors who provide certain management support and administrative oversight services including the organization and sale of stock, investment funds, limited partnerships and mutual funds.

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