2.2.0.7 false Statements of Changes in Shareholders' Equity (Deficit) (USD $) 00300 - Statement - Statements of Changes in Shareholders' Equity (Deficit) true false In Thousands false false 1 USD false false Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit13 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit13 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ 5 Shareholders' equity (deficit) - beginning of period 3 slv_ShareholdersEquityDeficit slv false credit instant The cumulative amount of the reporting entity's undistributed earnings or deficit and adjustment to redeemable capital shares... false false false false false false false false true false true negatedperiodstart false 1 true true false false -975307000 -975307 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary The cumulative amount of the reporting entity's undistributed earnings or deficit and adjustment to redeemable capital shares to redemption value. No authoritative reference available. false 6 Net income 3 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 99973000 99973 false false false 2 false true false false 574523000 574523 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 false 7 Adjustment of redeemable capital shares to redemption value 3 slv_AdjustmentOfRedeemableCapitalSharesToRedemptionValue slv false debit duration Adjustment reflecting the change in fair value of redeemable capital shares during the period. false false false false false false false false false false false label false 1 false true false false -519406000 -519406 false false false 2 false true false false -1549830000 -1549830 false false false xbrli:monetaryItemType monetary Adjustment reflecting the change in fair value of redeemable capital shares during the period. No authoritative reference available. false 8 Shareholders' equity (deficit) - end of period 3 slv_ShareholdersEquityDeficit slv false credit instant The cumulative amount of the reporting entity's undistributed earnings or deficit and adjustment to redeemable capital shares... false false false false false false false false false true true negatedperiodend false 1 true true false false -1394740000 -1394740 false false false 2 true true false false -975307000 -975307 false false false xbrli:monetaryItemType monetary The cumulative amount of the reporting entity's undistributed earnings or deficit and adjustment to redeemable capital shares to redemption value. No authoritative reference available. false 2 4 false Thousands UnKnown UnKnown false true