Computation of Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 1,998	$ 164	$ 147
Less: Dividends paid on and earnings allocated to participating securities	(21)		(2)
Earnings applicable to common stock	$ 1,977		$ 145
Weighted average common shares outstanding	686,911,555		465,138,238
Basic earnings per common share (in usd per share)	$ 2.88	$ 0.30	$ 0.31
Potential dilutive common shares	1,360,056		808,525
Total shares for diluted earnings per common share computation	688,271,611		465,946,763
Diluted earnings per common share and common share equivalents (in usd per share)	$ 2.87	$ 0.30	$ 0.31