XML 73 R58.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Non-operating income, net Non-Operating Income, net (Narrative) (Details) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Gain on Sale of Business [Abstract] |  |  |
Gain (Loss) on Disposition of Business | $ 10,421 | $ 0 | $ 0

X
- Definition Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment. + References No definition available. + Details
Name: | us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain on Sale of Business [Abstract] + References No definition available. + Details
Name: | vrsn_GainonSaleofBusinessAbstract
Namespace Prefix: | vrsn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration