Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 549	$ 604
Preferred stock dividends	(23)	(20)
Dividends and undistributed earnings allocated to participating securities	(1)	(1)
Net income available to common shareholders, basic	525	583
Net income available to common shareholders, diluted	$ 525	$ 583
Basic average common shares (in shares)	341,106	366,542
Effect of dilutive securities: equity-based awards (in shares)	4,366	5,495
Diluted average common shares (in shares)	345,472	372,037
Anti-dilutive securities (in shares)	23	8
Earnings per common share, basic:
Basic (in USD per share)	$ 1.54	$ 1.59
Earnings per common share, diluted:
Diluted (in USD per share)	$ 1.52	$ 1.57