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v3.21.1

Acquisitions and Dispositions - Dispositions (Details) $ in Millions |  | 3 Months Ended
--- | --- | ---
Feb. 03, 2021 USD ($) | Dec. 31, 2021 USD ($) MW | Mar. 31, 2021 USD ($) MW | Mar. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Generation capacity (in MW) | MW |  |  | 23,000 |
Gain on sale |  |  | $ 17 | $ 6
Agua Caliente Solar Project | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Percentage of ownership sold | 35.00% |  |  |
Cash consideration | $ 202 |  |  |
Gain on sale | 17 |  |  |
Cash disposed | $ 7 |  |  |
Other | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Proceeds from sale |  |  | $ 2 | $ 15
East and West | Forecast | Subsequent Event | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Generation capacity (in MW) | MW |  | 4,850 |  |
Proceeds from sale |  | $ 760 |  |
East and West | Forecast | Subsequent Event | Arthur Kill Plant |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Generation capacity (in MW) | MW |  | 866 |  |

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