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Document and Entity Information Document
Apr. 22, 2021
Oct. 22, 2020
Cover [Abstract]    
Local Phone Number   948-3200
Document Type   8-K
Entity Registrant Name   VERISIGN INC/CA
Entity Emerging Growth Company   false
Title of 12(b) Security   Common Stock, $0.001 Par Value Per Share
Pre-commencement Issuer Tender Offer   false
Pre-commencement Tender Offer   false
Soliciting Material   false
Written Communications   false
Entity Address, Address Line One   12061 Bluemont Way,
Entity File Number   000-23593
Entity Tax Identification Number   94-3221585
Entity Address, City or Town   Reston,
Entity Address, State or Province   VA
Entity Address, Postal Zip Code   20190
Trading Symbol   VRSN
Entity Central Index Key   0001014473
Amendment Flag   false
Security Exchange Name   NASDAQ
Document Period End Date Apr. 22, 2021  
Entity Incorporation, State or Country Code   DE
City Area Code   703