Goodwill and Other Intangible Assets - Components of Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	$ (493)	$ (459)
Indefinite-lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	667	568
Intangible Assets, Net (Excluding Goodwill)	174	109
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 Carrying Amount	$ 95	88
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(88)	(83)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 7	5
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	16 years
Finite-Lived Intangible Assets, Gross Carrying Amount	$ 17	6
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(2)	(2)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 15	4
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life	8 years
Finite-Lived Intangible Assets, Gross Carrying Amount	$ 470	389
Finite-Lived Intangible Assets, Accumulated Impairment and Amortization	(403)	(374)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 67	$ 15