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Segments (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) segment | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of strategic business units | segment |  |  | 4 |  |
Number of reportable segments | segment |  |  | 4 |  |
Revenue |  |  |  |  |
Total Revenue | $ 2,537 | $ 2,613 | $ 5,277 | $ 5,194 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 255 | 242 | 543 | 432 |
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |  |
Unrealized derivative losses (gains) | (24) | 2 | (12) | 1 |
Unrealized foreign currency transaction losses (gains) | 52 | (24) | 49 | (33) |
Disposition/acquisition losses (gains) | (61) | 56 | (839) | 108 |
Impairment losses | 92 | 94 | 92 | 262 |
Extinguishment of debt losses (gains) | 7 | 11 | 178 | (5) |
Pretax contribution | 189 | 103 | 1,072 | 99 |
Net equity in earnings of affiliates | 14 | 2 | 25 | 9 |
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests | (167) | (125) | (293) | (293) |
Income (loss) from continuing operations before taxes and equity in earnings of affiliates | 342 | 226 | 1,340 | 383 |
Restructuring Costs | 0 | 0 | 3 | 0 |
Assets |  |  |  |  |
Total Assets | 32,597 |  | 32,597 |  | $ 33,112
Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 2,537 | 2,613 | 5,277 | 5,194 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 255 | 242 | 543 | 432 |
Intersegment Eliminations [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | (7) | (5) | (25) | (9) |
US and Utilities [Domain] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 995 |  | 2,022 |  |
Assets |  |  |  |  |
Total Assets | 11,817 |  | 11,817 |  | 11,297
US and Utilities [Domain] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 995 | 1,046 | 2,022 | 2,093 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 76 | 89 | 196 | 150 |
MCAC [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 406 |  | 814 |  |
Assets |  |  |  |  |
Total Assets | 4,335 |  | 4,335 |  | 4,087
MCAC [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 406 | 375 | 814 | 723 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 81 | 72 | 134 | 118 |
EURASIA [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 292 |  | 711 |  |
Assets |  |  |  |  |
Total Assets | 4,659 |  | 4,659 |  | 4,557
EURASIA [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 292 | 395 | 711 | 824 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 55 | 80 | 138 | 157 |
Corporate Other And Other Eliminations [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | (2) |  | (11) |  |
Assets |  |  |  |  |
Total Assets | 423 |  | 423 |  | 263
Corporate Other And Other Eliminations [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 5 | 6 | 14 | 20 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | (74) | (94) | (178) | (215) |
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |
Assets |  |  |  |  |
Total Assets | 108 |  | 108 |  | 2,034
South America [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 846 |  | 1,741 |  |
Assets |  |  |  |  |
Total Assets | 11,255 |  | 11,255 |  | $ 10,874
South America [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 846 | 796 | 1,741 | 1,543 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | $ 117 | $ 95 | $ 253 | $ 222 |

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