Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income:
Interest and fees on loans	$ 3,196	$ 2,112	$ 1,935
Interest on money market investments	188	81	21
Interest on securities	563	512	311
Total interest income	3,947	2,705	2,267
Interest expense:
Interest on deposits	1,063	70	30
Interest on short- and long-term borrowings	446	115	29
Total interest expense	1,509	185	59
Net interest income	2,438	2,520	2,208
Provision for loan losses	148	101	(258)
Provision for unfunded lending commitments	(16)	21	(18)
Total provision for credit losses	132	122	(276)
Net interest income after provision for credit losses	2,306	2,398	2,484
Noninterest income:
Commercial account fees	174	159	137
Card fees	101	104	95
Retail and business banking fees	66	73	74
Loan-related fees and income	79	80	95
Capital markets fees	81	83	70
Wealth management fees	58	55	50
Other customer-related fees	61	60	54
Customer-related noninterest income	620	614	575
Fair value and nonhedge derivative income (loss)	(4)	16	14
Dividends and other income	57	17	43
Securities gains (losses), net	4	(15)	71
Total noninterest income	677	632	703
Noninterest expense:
Salaries and employee benefits	1,275	1,235	1,127
Technology, telecom, and information processing	240	209	199
Occupancy and equipment, net	160	152	153
Professional and legal services	62	57	72
Marketing and business development	46	39	43
Deposit insurance and regulatory expense	169	50	34
Credit-related expense	26	30	26
Other real estate expense, net	0	1	0
Other	119	105	87
Total noninterest expense	2,097	1,878	1,741
Income before income taxes	886	1,152	1,446
Income taxes	206	245	317
Net income	680	907	1,129
Preferred stock dividends	(32)	(29)	(29)
Net earnings applicable to common shareholders	$ 648	$ 878	$ 1,100
Weighted average common shares outstanding during the year:
Basic shares (in shares)	147,748	150,064	159,913
Diluted shares (in shares)	147,756	150,271	160,234
Net earnings per common share:
Basic (in dollars per share)	$ 4.35	$ 5.80	$ 6.80
Diluted (in dollars per share)	$ 4.35	$ 5.79	$ 6.79