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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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