Segments and Geographic Information Segment and Geographic Information (Adjusted Pre-Tax Contributions & Reconcilliation of Income Before Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 14,963	$ 17,146	$ 15,891
Adjusted PTC
External Adjusted Pre-Tax Contribution	1,150	1,321	1,207
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative gains	166	135	57
Unrealized foreign currency losses	(96)	(110)	(41)
Disposition/acquisition gains	42	361	30
Impairment losses	(504)	(416)	(588)
Loss on extinguishment of debt	(183)	(274)	(225)
Pre-tax contribution	575	1,017	440
Add: Income from continuing operations before taxes, attributable to noncontrolling interests	652	578	633
Less: Net equity in earnings of affiliates	105	19	25
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES	1,122	1,576	1,048
US SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	3,593	3,826	3,630
Adjusted PTC
External Adjusted Pre-Tax Contribution	372	455	451
Andes SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,479	2,638	2,638
Adjusted PTC
External Adjusted Pre-Tax Contribution	499	427	372
Brazil SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	4,666	6,009	5,015
Adjusted PTC
External Adjusted Pre-Tax Contribution	93	245	215
MCAC SBU (El Salvador)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,351	2,680	2,712
Adjusted PTC
External Adjusted Pre-Tax Contribution	345	378	351
Europe SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,187	1,433	1,347
Adjusted PTC
External Adjusted Pre-Tax Contribution	240	353	352
Asia SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	684	558	550
Adjusted PTC
External Adjusted Pre-Tax Contribution	99	48	144
Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	3	2	(1)
Adjusted PTC
External Adjusted Pre-Tax Contribution	(498)	(585)	(678)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	15,007	17,171	15,901
Adjusted PTC
External Adjusted Pre-Tax Contribution	1,150	1,321	1,207
Operating Segments | US SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	3,593	3,826	3,630
Adjusted PTC
External Adjusted Pre-Tax Contribution	360	445	440
Operating Segments | Andes SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,489	2,642	2,639
Adjusted PTC
External Adjusted Pre-Tax Contribution	482	421	353
Operating Segments | Brazil SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	4,666	6,009	5,015
Adjusted PTC
External Adjusted Pre-Tax Contribution	91	242	212
Operating Segments | MCAC SBU (El Salvador)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,353	2,682	2,713
Adjusted PTC
External Adjusted Pre-Tax Contribution	327	352	339
Operating Segments | Europe SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,191	1,439	1,347
Adjusted PTC
External Adjusted Pre-Tax Contribution	235	348	345
Operating Segments | Asia SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	684	558	550
Adjusted PTC
External Adjusted Pre-Tax Contribution	96	46	142
Operating Segments | Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	31	15	7
Adjusted PTC
External Adjusted Pre-Tax Contribution	(441)	(533)	(624)
Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(44)	(25)	(10)
Adjusted PTC
External Adjusted Pre-Tax Contribution	0	0	0
Intersegment Eliminations | US SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0
Adjusted PTC
External Adjusted Pre-Tax Contribution	12	10	11
Intersegment Eliminations | Andes SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(10)	(4)	(1)
Adjusted PTC
External Adjusted Pre-Tax Contribution	17	6	19
Intersegment Eliminations | Brazil SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0
Adjusted PTC
External Adjusted Pre-Tax Contribution	2	3	3
Intersegment Eliminations | MCAC SBU (El Salvador)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(2)	(2)	(1)
Adjusted PTC
External Adjusted Pre-Tax Contribution	18	26	12
Intersegment Eliminations | Europe SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(4)	(6)	0
Adjusted PTC
External Adjusted Pre-Tax Contribution	5	5	7
Intersegment Eliminations | Asia SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0
Adjusted PTC
External Adjusted Pre-Tax Contribution	3	2	2
Intersegment Eliminations | Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(28)	(13)	(8)
Adjusted PTC
External Adjusted Pre-Tax Contribution	$ (57)	$ (52)	$ (54)