Computation of Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 199	$ 144	$ 2,601	$ 453
Less: Dividends paid on and earnings allocated to participating securities	(2)	(2)	(27)	(6)
Earnings applicable to common stock	$ 197	$ 142	$ 2,574	$ 447
Weighted average common shares outstanding (in shares)	722,486,509	465,115,180	710,684,522	465,354,754
Basic earnings per common share (in usd per share)	$ 0.27	$ 0.31	$ 3.62	$ 0.96
Potential dilutive common shares	2,426,381	979,177	1,753,527	926,184
Total shares for diluted earnings per common share compensation (in shares)	724,912,890	466,094,357	712,438,049	466,280,938
Diluted earnings per common share and common share equivalents (in usd per share)	$ 0.27	$ 0.30	$ 3.61	$ 0.96