Summary of Significant Accounting Policies - Additional (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2022
Funds Deposited by Counterparties
Number of months beyond which company can not predict the holding of collateral (in months)	12 months
Securitization Receivable [Abstract]
Uplift securitization proceeds receivable from ERCOT	$ 689	$ 0
Project Development Costs and Capitalized Interest
Amount of interest capitalized	2	2	$ 3
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets, accumulated amortization	$ 1,636	1,357
Lease Revenue
Lease term	20 years
Gross Receipts and Sales Taxes
Gross Receipts Tax	$ 184	107	109
Purchased Energy and Other Cost of Sales for Customer Operations
Transmission and distribution charges not yet billed	189	98	103
Foreign Currency Translation and Transaction Gains and Losses
Cumulative translation adjustment	(8)	(2)	(13)
Marketing and Advertising Costs
Advertising expense	$ 109	$ 74	$ 66
Subsequent Event | Scenario, Forecast
Securitization Receivable [Abstract]
Uplift securitization proceeds receivable from ERCOT				$ 689
South Texas Project
Property, Plant and Equipment
Ownership Interest (as a percent)	44.00%