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Acquisitions and Dispositions - Narrative (Details) $ in Millions |  |  | 4 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
May 01, 2022 USD ($) | Mar. 25, 2022 USD ($) MW | May 01, 2022 USD ($) | Jun. 30, 2022 USD ($) MW | Jun. 30, 2021 USD ($) | Dec. 31, 2021
Schedule of Asset Acquisition [Line Items] |  |  |  |  |  |
Power generation capacity, megawatts | MW |  |  |  | 7,500 |  |
Payments for asset acquisition |  |  |  | $ 0 | $ 211 |
Thermal | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Schedule of Asset Acquisition [Line Items] |  |  |  |  |  |
Percentage of assets ownership sold | 100.00% |  | 100.00% |  |  |
Consideration received in asset disposition | $ 1,460 |  | $ 1,460 |  |  |
Transaction expenses |  |  | $ 18 |  |  |
Gain on sale of asset | $ 1,290 |  |  |  |  |
Disposition, property, plant and equipment, percent |  |  |  |  |  | 78.00%
Disposition, intangible assets, percent |  |  |  |  |  | 9.00%
Disposition, liabilities held for sale, percent |  |  |  |  |  | 85.00%
Mililani I Drop Down |  |  |  |  |  |
Schedule of Asset Acquisition [Line Items] |  |  |  |  |  |
Consideration transferred in asset acquisition |  | $ 22 |  |  |  |
Net liabilities assumed, net |  | (8) |  |  |  |
Mililani I Drop Down | Tax Equity Investors |  |  |  |  |  |
Schedule of Asset Acquisition [Line Items] |  |  |  |  |  |
Payments to fund project reserve accounts |  | $ 15 |  |  |  |
Mililani I Drop Down | Lighthouse Renewable Holdco LLC | Solar | Lighthouse Renewable Holdco LLC |  |  |  |  |  |
Schedule of Asset Acquisition [Line Items] |  |  |  |  |  |
Power generation capacity, megawatts | MW |  | 39 |  |  |  |
Power generation storage capacity, megawatts | MW |  | 156 |  |  |  |
Payments for asset acquisition |  | $ 22 |  |  |  |
Power purchase agreement period (in years_ |  | 20 years |  |  |  |
Mililani I Drop Down | Lighthouse Renewable Holdco LLC | Solar | Lighthouse Renewable Holdco LLC | Third Party Investor |  |  |  |  |  |
Schedule of Asset Acquisition [Line Items] |  |  |  |  |  |
Payments for asset acquisition |  | $ 14 |  |  |  |

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