Segments and Geographic Information Segment and Geographic Information (Assets, Depreciation and Amortization and Capital Expenditures ) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total Assets	$ 38,966	$ 40,411	$ 41,830
Depreciation and Amortization	1,245	1,294	1,394
Capital Expenditures	2,544	2,579	2,270
Interest Income	365	275	348
Interest Expense	1,471	1,482	1,544
Investments in and Advances to Affiliates	537	1,010	1,196
Equity in Earnings (Losses)	19	25	35
US SBU
Segment Reporting Information [Line Items]
Total Assets	10,062	9,952	10,651
Depreciation and Amortization	450	440	518
Capital Expenditures	534	426	405
Interest Income	0	0	3
Interest Expense	285	290	291
Investments in and Advances to Affiliates	1	1	0
Equity in Earnings (Losses)	0	0	0
Andes SBU
Segment Reporting Information [Line Items]
Total Assets	7,888	7,356	6,619
Depreciation and Amortization	182	186	174
Capital Expenditures	702	471	389
Interest Income	87	37	20
Interest Expense	160	135	128
Investments in and Advances to Affiliates	287	248	198
Equity in Earnings (Losses)	42	44	18
Brazil SBU
Segment Reporting Information [Line Items]
Total Assets	8,439	8,388	9,710
Depreciation and Amortization	260	259	281
Capital Expenditures	416	588	718
Interest Income	249	210	278
Interest Expense	331	364	305
Investments in and Advances to Affiliates	0	0	0
Equity in Earnings (Losses)	0	0	0
MCAC SBU (El Salvador)
Segment Reporting Information [Line Items]
Total Assets	4,948	5,075	5,030
Depreciation and Amortization	144	145	136
Capital Expenditures	192	111	192
Interest Income	26	20	33
Interest Expense	178	138	192
Investments in and Advances to Affiliates	0	0	24
Equity in Earnings (Losses)	0	4	5
Europe SBU
Segment Reporting Information [Line Items]
Total Assets	3,525	4,191	4,085
Depreciation and Amortization	154	155	145
Capital Expenditures	228	341	162
Interest Income	1	2	8
Interest Expense	98	80	94
Investments in and Advances to Affiliates	54	286	454
Equity in Earnings (Losses)	(25)	(5)	8
Asia SBU
Segment Reporting Information [Line Items]
Total Assets	2,972	2,810	2,587
Depreciation and Amortization	32	33	30
Capital Expenditures	429	576	221
Interest Income	2	6	5
Interest Expense	25	30	43
Investments in and Advances to Affiliates	194	186	202
Equity in Earnings (Losses)	10	10	32
Discontinued businesses
Segment Reporting Information [Line Items]
Total Assets	0	1,718	1,960
Depreciation and Amortization	(1)	55	85
Capital Expenditures	13	52	143
Corporate and Other & eliminations
Segment Reporting Information [Line Items]
Total Assets	1,132	921	1,188
Depreciation and Amortization	24	21	25
Capital Expenditures	30	14	40
Interest Income	0	0	1
Interest Expense	394	445	491
Investments in and Advances to Affiliates	1	289	318
Equity in Earnings (Losses)	$ (8)	$ (28)	$ (28)