Fair Value Of Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
contingent interest payment for debenture	$ (5,225,000)	$ 0
Fair value assumptions expected volatility rate	24.00%
fair value hypothetical increase decrease in volatility rate	5.00%
fair value assumptions credit spread	4.00%vrsn_FairValueAssumptionsCreditSpread
fair value hypothetical increase decrease in credit spread	1.00%
Convertible Debt, Fair Value Disclosures	2,500,000,000
Debt instrument fair value senior notes 2023	750,000,000
Debt instrument fair value senior notes 2025	$ 512,500,000

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Convertible Security

-URI http://asc.fasb.org/extlink&oid=6509036

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

contingent interest payment for debenture

+ References

No definition available.

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- Definition

Debt instrument fair value senior notes 2023

+ References

No definition available.

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- Definition

Debt instrument fair value senior notes 2025

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- Definition

fair value assumptions credit spread

+ References

No definition available.

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- Definition

fair value hypothetical increase or decrease in credit spread

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- Definition

fair value hypothetical increase decrease in volatility rate

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No definition available.

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