Commitments And Contingencies (Minimum Payments Required Under Purchase Obligations) (Details) $ in Millions	Dec. 31, 2024 USD ($)
Purchase Obligations [Member]
Purchase Obligations And Contractual Agreements [Line Items]
2025	$ 45.6
2026	12.7
2027	5.3
2028	3.0
2029	0.5
Thereafter	0.0
Total Commitment	67.1
transition tax commitment [Member]
Purchase Obligations And Contractual Agreements [Line Items]
2025	24.3
2026	0.0
2027	0.0
2028	0.0
2029	0.0
Thereafter	0.0
Total Commitment	24.3
Senior Notes [Member]
Purchase Obligations And Contractual Agreements [Line Items]
2025	559.5
2026	46.4
2027	596.4
2028	20.3
2029	20.3
Thereafter	780.2
Total Commitment	2,023.1
Commitments & Contingencies Total
Purchase Obligations And Contractual Agreements [Line Items]
2025	629.4
2026	59.1
2027	601.7
2028	23.3
2029	20.8
Thereafter	780.2
Total Commitment	$ 2,114.5

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase obligations and contractual agreements due after fifth year.

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsDueAfterFifthYear
Namespace Prefix:	vrsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase obligations and contractual agreements due in fifth year.

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsDueInFifthYear
Namespace Prefix:	vrsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase obligations and contractual agreements due in fourth year.

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsDueInFourthYear
Namespace Prefix:	vrsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase obligations and contractual agreements due in second year.

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsDueInSecondYear
Namespace Prefix:	vrsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase obligations and contractual agreements due in third year.

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsDueInThirdYear
Namespace Prefix:	vrsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase obligations and contractual agreements due with in one year.

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsDueWithInOneYear
Namespace Prefix:	vrsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Purchase Obligations And Contractual Agreements [Line Items]

+ References

No definition available.

+ Details

Name:	vrsn_PurchaseObligationsAndContractualAgreementsLineItems
Namespace Prefix:	vrsn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=vrsn_PurchaseObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=vrsn_TransitiontaxcommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=vrsn_CommitmentsContingenciesTotalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: