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v3.19.1

Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 2,650 | $ 2,740
Regulated Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 778 | 711
Other non-606 revenue | 7 | 11
Revenues | 785 | 722
Non-regulated revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 1,712 | 1,811
Other non-606 revenue | 153 | 207
Revenues | 1,865 | 2,018
US and Utilities [Domain] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,019 | 1,027
US and Utilities [Domain] | Regulated Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 778 | 711
Other non-606 revenue | 7 | 11
Revenues | 785 | 722
US and Utilities [Domain] | Non-regulated revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 173 | 208
Other non-606 revenue | 61 | 97
Revenues | 234 | 305
South America [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 845 | 895
South America [Member] | Regulated Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 0 | 0
Other non-606 revenue | 0 | 0
Revenues | 0 | 0
South America [Member] | Non-regulated revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 843 | 894
Other non-606 revenue | 2 | 1
Revenues | 845 | 895
MCAC [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 450 | 408
MCAC [Member] | Regulated Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 0 | 0
Other non-606 revenue | 0 | 0
Revenues | 0 | 0
MCAC [Member] | Non-regulated revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 429 | 387
Other non-606 revenue | 21 | 21
Revenues | 450 | 408
Eurasia - Generation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 339 | 419
Eurasia - Generation [Member] | Regulated Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 0 | 0
Other non-606 revenue | 0 | 0
Revenues | 0 | 0
Eurasia - Generation [Member] | Non-regulated revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 267 | 331
Other non-606 revenue | 72 | 88
Revenues | 339 | 419
Corporate Other And Other Eliminations [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | (3) | (9)
Corporate Other And Other Eliminations [Member] | Regulated Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 0 | 0
Other non-606 revenue | 0 | 0
Revenues | 0 | 0
Corporate Other And Other Eliminations [Member] | Non-regulated revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 0 | (9)
Other non-606 revenue | (3) | 0
Revenues | $ (3) | $ (9)

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