Segment and Geographic Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012 segment	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of strategic business units	6
Number of reportable segments	6	9
Revenue
Revenue	$ 15,891	$ 17,164	$ 16,098
Operating Segments
Revenue
Revenue	15,901	17,203	16,146
Intersegment Eliminations
Revenue
Revenue	(10)	(39)	(48)
US
Revenue
Revenue	3,630	3,736	2,087
US | Operating Segments
Revenue
Revenue	3,630	3,736	2,088
US | Intersegment Eliminations
Revenue
Revenue	0	0	(1)
Andes
Revenue
Revenue	2,638	2,987	2,953
Andes | Operating Segments
Revenue
Revenue	2,639	3,020	2,989
Andes | Intersegment Eliminations
Revenue
Revenue	(1)	(33)	(36)
Brazil SBU
Revenue
Revenue	5,015	5,788	6,640
Brazil SBU | Operating Segments
Revenue
Revenue	5,015	5,788	6,640
Brazil SBU | Intersegment Eliminations
Revenue
Revenue	0	0	0
MCAC
Revenue
Revenue	2,712	2,573	2,324
MCAC | Operating Segments
Revenue
Revenue	2,713	2,573	2,327
MCAC | Intersegment Eliminations
Revenue
Revenue	(1)	0	(3)
EMEA
Revenue
Revenue	1,347	1,343	1,467
EMEA | Operating Segments
Revenue
Revenue	1,347	1,344	1,469
EMEA | Intersegment Eliminations
Revenue
Revenue	0	(1)	(2)
Asia
Revenue
Revenue	550	733	625
Asia | Operating Segments
Revenue
Revenue	550	733	625
Asia | Intersegment Eliminations
Revenue
Revenue	0	0	0
Corporate & Other
Revenue
Revenue	(1)	4	2
Corporate & Other | Operating Segments
Revenue
Revenue	7	9	8
Corporate & Other | Intersegment Eliminations
Revenue
Revenue	$ (8)	$ (5)	$ (6)