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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Reporting Information Adjusted Pretax Contribution | $ 1,185 | $ 1,017 | $ 850
Reconciliation To Income From Continuing Operations Before Taxes |  |  |
Unrealized derivative losses (gains) | (33) | 3 | 9
Unrealized foreign currency losses (gains) | (51) | 59 | (22)
Disposition/acquisition losses (gains) | 934 | (123) | (6)
Impairment expense | (307) | (542) | (933)
Loss on extinguishment of debt | (180) | (62) | (29)
One time restructuring costs | 0 | 31 | 0
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES | 2,018 | 771 | 187
Net equity in earnings of affiliates | 39 | 71 | 36
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | (509) | (521) | (354)
Pre-tax contribution | 1,548 | 321 | (131)
Operating Segments | US and Utilities SBU |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Reporting Information Adjusted Pretax Contribution | 511 | 424 | 392
Reconciliation To Income From Continuing Operations Before Taxes |  |  |
Net equity in earnings of affiliates | 35 | 41 | 9
Operating Segments | Andes SBU |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Reporting Information Adjusted Pretax Contribution | 519 | 446 | 428
Reconciliation To Income From Continuing Operations Before Taxes |  |  |
Net equity in earnings of affiliates | 15 | 28 | 15
Operating Segments | MCAC SBU |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Reporting Information Adjusted Pretax Contribution | 300 | 277 | 222
Reconciliation To Income From Continuing Operations Before Taxes |  |  |
Net equity in earnings of affiliates | (7) | (4) | (2)
Operating Segments | EURASIA [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Reporting Information Adjusted Pretax Contribution | 222 | 290 | 283
Reconciliation To Income From Continuing Operations Before Taxes |  |  |
Net equity in earnings of affiliates | 14 | 9 | 13
Corporate, Non-Segment [Member] | Corporate, Other and Eliminations |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Reporting Information Adjusted Pretax Contribution | (367) | (420) | (475)
Reconciliation To Income From Continuing Operations Before Taxes |  |  |
Net equity in earnings of affiliates | $ (18) | $ (3) | $ 1

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