Unitholders' Capital (Details)	12 Months Ended
Dec. 31, 2017
Unitholders' Capital
Redemption price percentage	100.00%
Redemption price percentage for Units redeemed for cash	95.00%
Percentage reduction to the redemption price	5.00%

Represents percentage at which Units redeemed for physical bullion will be entitled to a redemption price of the Net Asset Value ("NAV") of the redeemed Units.

No definition available.

Name:	pslv_PercentageUnitsRedeemedEntitledToNetAssetValueRedeemedUnits
Namespace Prefix:	pslv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration