Segment and Geographic Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 segment	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of strategic business units	6
Number of reportable segments	6
Revenue
Revenue	$ 17,146	$ 15,891	$ 17,164
US SBU
Revenue
Revenue	3,826	3,630	3,736
Andes SBU
Revenue
Revenue	2,638	2,638	2,987
Brazil SBU
Revenue
Revenue	6,009	5,015	5,788
MCAC SBU (El Salvador)
Revenue
Revenue	2,680	2,712	2,573
Europe SBU
Revenue
Revenue	1,433	1,347	1,343
Asia SBU
Revenue
Revenue	558	550	733
Corporate and Other
Revenue
Revenue	2	(1)	4
Operating Segments
Revenue
Revenue	17,171	15,901	17,203
Operating Segments | US SBU
Revenue
Revenue	3,826	3,630	3,736
Operating Segments | Andes SBU
Revenue
Revenue	2,642	2,639	3,020
Operating Segments | Brazil SBU
Revenue
Revenue	6,009	5,015	5,788
Operating Segments | MCAC SBU (El Salvador)
Revenue
Revenue	2,682	2,713	2,573
Operating Segments | Europe SBU
Revenue
Revenue	1,439	1,347	1,344
Operating Segments | Asia SBU
Revenue
Revenue	558	550	733
Operating Segments | Corporate and Other
Revenue
Revenue	15	7	9
Intersegment Eliminations
Revenue
Revenue	(25)	(10)	(39)
Intersegment Eliminations | US SBU
Revenue
Revenue	0	0	0
Intersegment Eliminations | Andes SBU
Revenue
Revenue	(4)	(1)	(33)
Intersegment Eliminations | Brazil SBU
Revenue
Revenue	0	0	0
Intersegment Eliminations | MCAC SBU (El Salvador)
Revenue
Revenue	(2)	(1)	0
Intersegment Eliminations | Europe SBU
Revenue
Revenue	(6)	0	(1)
Intersegment Eliminations | Asia SBU
Revenue
Revenue	0	0	0
Intersegment Eliminations | Corporate and Other
Revenue
Revenue	$ (13)	$ (8)	$ (5)