Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Common stock held in trust (in shares)	103,889	108,188
Release of common stock held in trust (in shares)	4,299	4,355
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Number of shares repurchased during period (in shares)	0
Treasury shares (in shares)	997,983
Repurchases of common stock	$ 47	$ 47
Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)	0	0
Common Stock
Class of Stock [Line Items]
Issuance of common stock (in shares)	138,030	56,127
Iberdrola Renewables Holding, Inc
Class of Stock [Line Items]
Percentage of equity owned by parent	81.50%