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Acquisitions and Dispositions - Dispositions (Details) $ in Millions |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 06, 2023 USD ($) | Jun. 01, 2022 USD ($) | Dec. 01, 2021 USD ($) MW | Feb. 03, 2021 USD ($) | Nov. 13, 2020 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2022 USD ($) MW | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  |  |  |  |  | 16 |  |
Loss on debt extinguishment |  |  |  |  |  |  | $ 0 | $ 77 | $ 9
Watson Facility |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Ownership percentage |  | 49.00% |  |  |  |  |  |  |
Proceeds from sale of investment |  | $ 59 |  |  |  |  |  |  |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Agua Caliente Solar Project |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Consideration |  |  |  | $ 202 |  |  |  |  |
Percentage of ownership sold |  |  |  | 35.00% |  |  |  |  |
Gain on sale |  |  |  | $ 17 |  |  |  |  |
Cash disposed |  |  |  | $ 7 |  |  |  |  |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Home Solar |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Gain (loss) on sale of business |  |  |  |  | $ (2) |  |  |  |
Proceeds from sale |  |  |  |  | 66 |  |  |  |
Debt extinguished |  |  |  |  | 27 |  |  |  |
Loss on debt extinguishment |  |  |  |  | $ 5 |  |  |  |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Indemnification Agreement |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Guarantee (up to) |  |  | $ 39 |  |  |  |  |  |
East | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from sale | $ 212 |  |  |  |  |  |  |  |
Transaction fees on disposal | $ 3 |  |  |  |  |  |  |  |
West/Services/Other | Watson Facility |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Gain on sale of investment |  | $ 46 |  |  |  |  |  |  |
West/Services/Other | Held-for-sale | Home Solar |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Impairment loss to adjust the carrying amount of assets and liabilities |  |  |  |  |  | $ 29 |  |  |
East/West Other | Arthur Kill Plant |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  | 866 |  |  |  |  |  |
East/West 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] |  |  |  |  |  |  |  |  |
Generation capacity (in MW) | MW |  |  | 4,850 |  |  |  |  |  |
Consideration |  |  | $ 760 |  |  |  |  |  |
Working capital adjustments |  |  | 140 |  |  |  |  |  |
Proceeds from sale of, net of working capital adjustments |  |  | 620 |  |  |  |  |  |
Gain (loss) on sale of business |  |  | $ 207 |  |  |  |  |  |

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