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Acquisitions, Discontinued Operations and Dispositions - Sale of Assets Prior to Discontinued (Details) $ in Millions | Dec. 31, 2019 MW | Jan. 11, 2019 USD ($) | Jun. 19, 2018 USD ($) | Mar. 30, 2018 USD ($) MW | Mar. 27, 2017 USD ($) utility_scale_solar_project MW
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Generation capacity (in MW) | MW | 23,000 |  |  |  |
UPMC Thermal Project |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  | $ 3 | $ 84 |  |
Buckthorn Renewables, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  |  |  | $ 42 |
Percentage of ownership sold |  |  |  | 10000.00% |
Generation capacity (in MW) | MW |  |  |  | 154 |
Debt assumed |  |  |  | $ 183 |
Agua Caliente Solar Project |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  |  |  |  | $ 130
Debt assumed |  |  |  |  | 328
Working capital adjustments |  |  |  |  | $ 1
Agua Caliente Solar Project | Agua Caliente |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of ownership sold |  |  |  |  | 16.00%
Generation capacity (in MW) | MW |  |  |  |  | 46
Agua Caliente Solar Project | Utah Portfolio |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  |  | 265
Number Of utility scale solar projects | utility_scale_solar_project |  |  |  |  | 7

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