Debt And Interest Expense (Carrying Amounts Of Liability And Equity Components) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Apr. 16, 2013	Aug. 15, 2007
Debt Disclosure [Abstract]
Debt Instrument, Unamortized Discount (Premium), Net	$ 686,221	$ 686,221
deferred tax on debenture discount	(267,225)vrsn_Deferredtaxondebenturediscount	(267,225)vrsn_Deferredtaxondebenturediscount
Carrying amount of equity component (net of issuance costs of $14,449)	418,996	418,996
Principal amount of debt	1,250,000us-gaap_DebtInstrumentFaceAmount	1,250,000us-gaap_DebtInstrumentFaceAmount	750,000us-gaap_DebtInstrumentFaceAmount	1,250,000us-gaap_DebtInstrumentFaceAmount
Unamortized discount of liability component	(645,565)	(654,948)
Carrying amount of liability component	604,435	595,052
Contingent interest derivative	26,755us-gaap_DerivativeLiabilities	29,004us-gaap_DerivativeLiabilities
Convertible Debt	$ 631,190us-gaap_ConvertibleDebt	$ 624,056us-gaap_ConvertibleDebt

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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Face (par) amount of debt instrument at time of issuance.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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- Definition

The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Debt instrument, convertible, carrying amount of liability component

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- Definition

deferred tax on debenture discount which is included in Additional Paid-in capital

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No definition available.

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