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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2019
Revenue from Contracts with Customers [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following table presents our revenue from contracts with customers and other revenue for the periods indicated (in millions):
| Three Months Ended June 30, 2019
| US and Utilities SBU |  | South America SBU |  | MCAC SBU |  | Eurasia SBU |  | Corporate, Other and Eliminations |  | Total
Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 706 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 706 |
Other regulated revenue | 18 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 18 |
Total regulated revenue | 724 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 724 |
Non-Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | 180 |  |  | 764 |  |  | 455 |  |  | 201 |  |  | (2 | ) |  | 1,598 |
Other non-regulated revenue (1) | 72 |  |  | 1 |  |  | 23 |  |  | 64 |  |  | 1 |  |  | 161 |
Total non-regulated revenue | 252 |  |  | 765 |  |  | 478 |  |  | 265 |  |  | (1 | ) |  | 1,759 |
Total revenue | $ | 976 |  |  | $ | 765 |  |  | $ | 478 |  |  | $ | 265 |  |  | $ | (1 | ) |  | $ | 2,483 |
| Three Months Ended June 30, 2018
| US and Utilities SBU |  | South America SBU |  | MCAC SBU |  | Eurasia SBU |  | Corporate, Other and Eliminations |  | Total
Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 706 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 706 |
Other regulated revenue | 10 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10 |
Total regulated revenue | 716 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 716 |
Non-Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | 180 |  |  | 845 |  |  | 384 |  |  | 218 |  |  | — |  |  | 1,627 |
Other non-regulated revenue (1) | 99 |  |  | 1 |  |  | 22 |  |  | 74 |  |  | (2 | ) |  | 194 |
Total non-regulated revenue | 279 |  |  | 846 |  |  | 406 |  |  | 292 |  |  | (2 | ) |  | 1,821 |
Total revenue | $ | 995 |  |  | $ | 846 |  |  | $ | 406 |  |  | $ | 292 |  |  | $ | (2 | ) |  | $ | 2,537 |
| Six Months Ended June 30, 2019
| US and Utilities SBU |  | South America SBU |  | MCAC SBU |  | Eurasia SBU |  | Corporate, Other and Eliminations |  | Total
Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 1,484 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,484 |
Other regulated revenue | 25 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 25 |
Total regulated revenue | 1,509 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,509 |
Non-Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | 353 |  |  | 1,607 |  |  | 884 |  |  | 468 |  |  | (2 | ) |  | 3,310 |
Other non-regulated revenue (1) | 133 |  |  | 3 |  |  | 44 |  |  | 136 |  |  | (2 | ) |  | 314 |
Total non-regulated revenue | 486 |  |  | 1,610 |  |  | 928 |  |  | 604 |  |  | (4 | ) |  | 3,624 |
Total revenue | $ | 1,995 |  |  | $ | 1,610 |  |  | $ | 928 |  |  | $ | 604 |  |  | $ | (4 | ) |  | $ | 5,133 |
| Six Months Ended June 30, 2018
| US and Utilities SBU |  | South America SBU |  | MCAC SBU |  | Eurasia SBU |  | Corporate, Other and Eliminations |  | Total
Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 1,417 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,417 |
Other regulated revenue | 21 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 21 |
Total regulated revenue | 1,438 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,438 |
Non-Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | 388 |  |  | 1,739 |  |  | 771 |  |  | 549 |  |  | (9 | ) |  | 3,438 |
Other non-regulated revenue (1) | 196 |  |  | 2 |  |  | 43 |  |  | 162 |  |  | (2 | ) |  | 401 |
Total non-regulated revenue | 584 |  |  | 1,741 |  |  | 814 |  |  | 711 |  |  | (11 | ) |  | 3,839 |
Total revenue | $ | 2,022 |  |  | $ | 1,741 |  |  | $ | 814 |  |  | $ | 711 |  |  | $ | (11 | ) |  | $ | 5,277 |

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- Definition Revenue from Contracts with Customers [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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