Document and Entity Information Document - shares shares in Millions	9 Months Ended
	Sep. 30, 2023	Oct. 20, 2023
Document And Entity Information [Abstract]
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	VRSN
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3221585
Entity Address, Postal Zip Code	20190
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name	VERISIGN INC/CA
Entity Central Index Key	0001014473
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2023
Entity File Number	000-23593
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		102.1
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Address, Address Line One	12061 Bluemont Way,
Entity Address, City or Town	Reston,
Entity Address, State or Province	VA
City Area Code	703
Local Phone Number	948-3200
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false