Goodwill and Other Intangible Assets - Components of Other Intangible Assets (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	$ (512,000,000)		$ (493,000,000)
Intangible Assets, Gross (Excluding Goodwill)	689,000,000		667,000,000
Intangible Assets, Net (Excluding Goodwill)	177,000,000		174,000,000
Trademarks and Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill), Net	65,000,000		65,000,000
Used In Research And Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill), Net	0		20,000,000
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross	20,000,000	$ 20,000,000	20,000,000
Indefinite-Lived Intangible Assets (Excluding Goodwill), Accumulated Impairment Loss	$ (20,000,000)
Core Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	7 years
Finite-Lived Intangible Assets, Gross	$ 110,000,000		95,000,000
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(88,000,000)		(88,000,000)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 22,000,000		7,000,000
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	15 years
Finite-Lived Intangible Assets, Gross	$ 19,000,000		17,000,000
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(3,000,000)		(2,000,000)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 16,000,000		15,000,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	8 years
Finite-Lived Intangible Assets, Gross	$ 475,000,000		470,000,000
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(401,000,000)		(403,000,000)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 74,000,000		$ 67,000,000