Computation of Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 405	$ 163	$ 2,403	$ 310
Less: Dividends paid on and earnings allocated to participating securities	(4)	(2)	(26)	(4)
Earnings applicable to common stock	$ 401	$ 161	$ 2,377	$ 306
Weighted average common shares outstanding (in shares)	722,264,568	465,811,096	704,685,721	465,476,526
Basic earnings per common share (in usd per share)	$ 0.55	$ 0.34	$ 3.37	$ 0.66
Potential dilutive common shares	1,462,426	988,976	1,411,524	899,249
Total shares for diluted earnings per common share compensation (in shares)	723,726,994	466,800,072	706,097,245	466,375,775
Diluted earnings per common share and common share equivalents (in usd per share)	$ 0.55	$ 0.34	$ 3.37	$ 0.66