Goodwill and Other Intangible Assets (Intangible Assets Acquired) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 80	$ 69
Land Use Rights [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		13
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years
Other intangible assets acquired	$ 5	5
Computer Software, Intangible Asset [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 51	$ 29
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years	5 years
Contracts
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 24	$ 22
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	26 years	5 years