Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 05, 2019
Document Information [Line Items]
Entity Central Index Key	0001330568
Entity Shell Company	false
Entity Registrant Name	iShares Silver Trust
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
Entity Small Business	false
Entity Emerging Growth Company	false
Document Quarterly Report	true
Document Transition Report	false
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Entity File Number	001-32863
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	13-7474456
Entity Address, Address Line One	400 Howard Street
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94105
City Area Code	415
Local Phone Number	670-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Title of 12(b) Security	Shares
Trading Symbol	SLV
Security Exchange Name	NYSEArca
Entity Common Stock, Shares Outstanding		383,500,000