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Discontinued Operations, Acquisitions and Dispositions - Acquisitions (Details) $ in Millions |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 09, 2016 USD ($) | Nov. 02, 2016 USD ($) MW | Oct. 03, 2016 USD ($) MW | Jun. 29, 2015 USD ($) MW | Dec. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) MW
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  |  |  | 30,000
Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration |  |  |  |  | $ 124 |
Purchase price |  |  |  |  | 328 |
Current assets |  |  |  |  | 5 |
Payments contingent upon future development milestones |  |  |  |  |  | $ 59
Amount paid for contingent consideration liability as of period end |  |  |  |  |  | 20
SunEdison Solar Distributed Generation |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  | 29 |  |  |
Cash consideration |  |  | $ 67 |  |  |
Purchase price allocated to construction in process |  |  | 47 |  |  |
Purchase price allocated to intangible |  |  | 15 |  |  |
Desert Sunlight |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  | 550 |  |
Cash consideration |  |  |  | $ 285 |  |
Percentage of ownership interest |  |  |  | 25.00% |  |
Mechanically-complete Solar Assets | Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  | 530 |  |  |  |
In-development Wind Assets | Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration |  | $ 111 |  |  |  |
Debt assumed |  |  |  |  | $ 222 | $ 222
Remaining Lease Term |  |  |  |  | 20 years |
Construction-ready and in-development solar assets | Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  |  |  | 110
Cash consideration |  |  | 2 |  |  |
In-development solar assets | Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  |  |  | 71
Construction-ready Solar Facility | Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  |  |  | 154
Cash consideration | $ 11 |  |  |  |  |
NRG | Mechanically-complete Solar Assets | Sun Edison Utility-Scale Solar and Wind |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Generation capacity (in MW) | MW |  | 265 |  |  |  |
Post-closing obligations | SunEdison Solar Distributed Generation |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration |  |  | $ 5 |  |  |
Non Recourse Debt | Utah Portfolio |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Additional debt borrowed |  |  |  |  | $ 65 | $ 65

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