Description Of Business And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Capitalized Computer Software, Additions	$ 6.0	$ 6.7
Gain (Loss), Foreign Currency Transaction, before Tax			$ 14.7
Derivative, Gain (Loss) on Derivative, Net			$ 9.8
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Nonoperating Gains (Losses)
Derivative, Notional Amount	$ 67.7
Building Improvements [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment (years)	10 years
Minimum [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
RegistrationTerm	one
Minimum [Member] \| Buildings [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment (years)	35 years
Minimum [Member] \| Computer Equipment, Purchased Software, Office Equipment, And Furniture And Fixtures [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment (years)	3 years
Maximum [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
RegistrationTerm	ten
Maximum [Member] \| Buildings [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment (years)	47 years
Maximum [Member] \| Computer Equipment, Purchased Software, Office Equipment, And Furniture And Fixtures [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment (years)	6 years

VERISIGN INC/CA 10-K