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Fair Value Measurements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of changes in fair value measurement, assets [abstract]
Balance at beginning of year	$ 954,587,514
Realized losses on sales and redemptions for physical bullion	(5,400,608)	$ (966,565)
Change in unrealized gains (losses)	(76,160,284)	57,726,059
Balance at end of year	871,613,584	954,587,514
Recurring fair value measurement
Reconciliation of changes in fair value measurement, assets [abstract]
Balance at beginning of year	954,587,514	885,981,474
Purchases	7,501,519	13,450,769
Sales	(1,169,773)	(1,604,223)
Redemptions for physical bullion	(7,744,784)
Realized losses on sales and redemptions for physical bullion	(5,400,608)	(966,565)
Change in unrealized gains (losses)	(76,160,284)	57,726,059
Balance at end of year	$ 871,613,584	$ 954,587,514

X

- Definition

The gains (losses) recognised in profit or loss for assets measured at fair value that are attributable to the change in unrealised gains or losses relating to those assets held at the end of the reporting period. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph f
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-URIDate 2018-03-16

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X

- Definition

The increase in the fair value measurement of assets resulting from purchases of those assets. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_iii&doctype=Standard
-URIDate 2018-03-16

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- References

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X

- Definition

The decrease in the fair value measurement of assets resulting from sales. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_iii&doctype=Standard
-URIDate 2018-03-16

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X

- Definition

The amount of current silver bullion assets.

+ References

No definition available.

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X

- Definition

Represents the net realized gains (losses) on redemptions/sales of bullion.

+ References

No definition available.

+ Details

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- Definition

The decrease in the fair value measurement of bullion holdings resulting from redemptions for physical bullion.

+ References

No definition available.

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