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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, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment Reporting Information Adjusted Pretax Contribution |  | $ 1,017 | $ 850 | $ 1,151
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |
Unrealized derivative gains |  | (3) | (9) | (166)
Unrealized foreign currency (gains) losses |  | (59) | 22 | 95
Disposition/acquisition (gains) losses |  | 123 | 6 | (42)
Impairment losses |  | 542 | 933 | 504
Loss on extinguishment of debt |  | 62 | 29 | 179
One time restructuring costs | [1] | 31 | 0 | 0
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES |  | 771 | 187 | 989
Net equity in earnings of affiliates |  | 71 | 36 | 105
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  | (521) | 354 | 513
Pre-tax contribution |  | 321 | (131) | 581
Operating Segments | US SBU |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment Reporting Information Adjusted Pretax Contribution |  | 361 | 347 | 360
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |
Net equity in earnings of affiliates |  | 41 | 9 | 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 |  | 386 | 390 | 482
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |
Net equity in earnings of affiliates |  | 28 | 15 | 83
Operating Segments | Brazil SBU |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment Reporting Information Adjusted Pretax Contribution |  | 60 | 38 | 92
Operating Segments | MCAC SBU |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment Reporting Information Adjusted Pretax Contribution |  | 340 | 267 | 327
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |
Net equity in earnings of affiliates |  | (4) | (2) | 0
Operating Segments | EURASIA [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment Reporting Information Adjusted Pretax Contribution |  | 290 | 283 | 331
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |
Net equity in earnings of affiliates |  | 9 | 13 | 18
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 |  | (420) | (475) | (441)
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |
Net equity in earnings of affiliates |  | $ (3) | $ 1 | $ 4
[1] | One-time restructuring charges consisting of severance costs related to workforce reductions.

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