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, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	$ 842	$ 1,177	$ 1,187
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative (gains) losses	(9)	(166)	(135)
Unrealized foreign currency losses	23	96	110
Disposition/acquisition (gains) losses	6	(42)	(361)
Impairment losses	933	504	415
Loss on extinguishment of debt	29	179	274
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES	137	1,154	1,443
Net equity in earnings of affiliates	36	105	19
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	313	653	578
Pre-tax contribution	(140)	606	884
Operating Segments \| US SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	347	360	445
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	9	0	0
Operating Segments \| Andes SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	390	482	421
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	15	83	42
Operating Segments \| Brazil SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	29	118	108
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	0	0	0
Operating Segments \| MCAC SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	267	327	352
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	(2)	0	0
Operating Segments \| Europe SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	187	235	348
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	10	10	(25)
Operating Segments \| Asia SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	96	96	46
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	3	8	10
Corporate, Non-Segment [Member] \| Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution	(474)	(441)	(533)
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings of affiliates	$ 1	$ 4	$ (8)

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