v3.7.0.1
Document and Entity Information Document - shares
3 Months Ended
Mar. 31, 2017
Apr. 21, 2017
Document And Entity Information [Abstract]    
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 Mar. 31, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   101,475,614