Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 733	$ 732
Accumulated Amortization	(631)	(609)
Reseller & customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	322	322
Accumulated Amortization	$ (265)	$ (251)
Reseller & customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	1 year	1 year
Reseller & customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	20 years	20 years
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 347	$ 346
Accumulated Amortization	$ (304)	$ (296)
Intellectual property | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	2 years	2 years
Intellectual property | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	8 years	8 years
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	8 years	8 years
Gross Carrying Amount	$ 0	$ 0
Accumulated Amortization	0	0
Tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	64	64
Accumulated Amortization	$ (62)	$ (62)
Tradenames | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	1 year	1 year
Tradenames | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in Years)	10 years	10 years