Goodwill and Other Intangible Assets (Goodwill Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Goodwill	$ 3,912	$ 3,912	$ 3,896
Accumulated impairment losses	(2,755)	(2,755)	(2,438)
Net balance	1,157	1,157	1,458
Goodwill impairment expense	0	(317)	(164)
Goodwill, Acquired During Period		16
US
Goodwill [Roll Forward]
Goodwill	2,674	2,674	2,658
Accumulated impairment losses	(2,633)	(2,633)	(2,316)
Net balance	41	41	342
Goodwill impairment expense		(317)
Goodwill, Acquired During Period		16
Andes
Goodwill [Roll Forward]
Goodwill	899	899	899
Accumulated impairment losses	0	0	0
Net balance	899	899	899
Goodwill impairment expense		0
Goodwill, Acquired During Period		0
MCAC
Goodwill [Roll Forward]
Goodwill	149	149	149
Accumulated impairment losses	0	0	0
Net balance	149	149	149
Goodwill impairment expense		0
Goodwill, Acquired During Period		0
Europe
Goodwill [Roll Forward]
Goodwill	122	122	122
Accumulated impairment losses	(122)	(122)	(122)
Net balance	0	0	0
Goodwill impairment expense		0
Goodwill, Acquired During Period		0
Asia
Goodwill [Roll Forward]
Goodwill	68	68	68
Accumulated impairment losses	0	0	0
Net balance	$ 68	68	$ 68
Goodwill impairment expense		0
Goodwill, Acquired During Period		$ 0