Goodwill and Other Intangible Assets - Components of Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	$ (501)	$ (493)
Intangible Assets, Gross (Excluding Goodwill)	673	667
Intangible Assets, Net (Excluding Goodwill)	172	174
Trademarks and Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	65	65
Used In Research And Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 20	20
Core Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	7 years
Finite-Lived Intangible Assets, Gross	$ 96	95
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(90)	(88)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 6	7
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	16 years
Finite-Lived Intangible Assets, Gross	$ 18	17
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(3)	(2)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 15	15
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	8 years
Finite-Lived Intangible Assets, Gross	$ 474	470
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(408)	(403)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 66	$ 67