Schedules of Investments (Unaudited) - Investments (Details)	Jun. 30, 2020 USD ($) oz	Mar. 31, 2020 USD ($) oz	Dec. 31, 2019 USD ($) oz	Jun. 30, 2019 USD ($) oz	Mar. 31, 2019 USD ($) oz	Dec. 31, 2018 USD ($) oz
Silver bullion (Ounce) \| oz	498,007,498	395,368,466	362,616,711	323,330,613	309,301,232	317,233,610
Investment in silver bullion, cost	$ 8,374,199,813	$ 6,681,432,888	$ 6,294,157,046	$ 5,667,962,993	$ 5,475,186,353	$ 5,641,558,156
Silver bullion fair value	8,886,943,805		6,543,418,555
Less Liabilities	(3,486,918)		(2,659,990)
Net Assets	$ 8,883,456,887	$ 5,505,117,093	$ 6,540,758,565	$ 4,919,140,506	$ 4,668,431,637	$ 4,904,036,623

Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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