Goodwill Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning Balance	$ 2,803	$ 3,011
Goodwill Acquired		3
Purchase price and other adjustments		1
Foreign currency translation	(6)	(212)
Ending Balance	2,797	2,803
North America [Member]
Goodwill [Roll Forward]
Beginning Balance	1,756	1,896
Goodwill Acquired		3
Purchase price and other adjustments		0
Foreign currency translation	21	(143)
Ending Balance	1,777	1,756
Middle East/North Africa/Asia [Member]
Goodwill [Roll Forward]
Beginning Balance	190	195
Goodwill Acquired		0
Purchase price and other adjustments		1
Foreign currency translation	(1)	(6)
Ending Balance	189	190
Europe/Sub-Sahara Africa/Russia [Member]
Goodwill [Roll Forward]
Beginning Balance	573	623
Goodwill Acquired		0
Purchase price and other adjustments		0
Foreign currency translation	(30)	(50)
Ending Balance	543	573
Latin America [Member]
Goodwill [Roll Forward]
Beginning Balance	284	297
Goodwill Acquired		0
Purchase price and other adjustments		0
Foreign currency translation	4	(13)
Ending Balance	$ 288	$ 284