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Note 3 - Trust Expenses (Details) (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2014
Note 3 - Trust Expenses (Details) [Line Items] |
Sponsors Fee Annualized Accrual Rate Based On Daily Net Asset Value | 0.50%
Maximum [Member] |
Note 3 - Trust Expenses (Details) [Line Items] |
Legal Fees Per Year | $ 100,000

X
- Definition Maximum per annum in legal fees and expenses the sponsor has agreed to assume. + References No definition available. + Details
Name: | slv_LegalFeesPerYear
Namespace Prefix: | slv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | slv_Note3TrustExpensesDetailsLineItems
Namespace Prefix: | slv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annualized sponsor's fee rate accrued daily based on the net asset value of the trust. + References No definition available. + Details
Name: | slv_SponsorsFeeAnnualizedAccrualRateBasedOnDailyNetAssetValue
Namespace Prefix: | slv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration