Trust Expenses (Details) (USD $)	6 Months Ended
Jun. 30, 2011
Trust Expenses
Sponsor's fee, annualized accrual rate based on adjusted daily net asset value	0.50%
Legal fees, per year, maximum	$ 100,000

Name:

slv_SponsorSFeeAnnualizedAccrualRateBasedOnAdjustedDailyNetAssetValue

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slv

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num:percentItemType

Balance Type:

na

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duration