Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income
Interest and fees on loans and leases	$ 3,874	$ 3,575	$ 2,292
Interest and fees on loans held for sale	36	51	39
Interest on investment securities	241	247	198
Interest on trading securities	85	78	58
Interest on other earning assets	116	149	96
Total interest income	4,352	4,100	2,683
Interest expense:
Interest on deposits	1,620	1,266	184
Interest on trading liabilities	24	12	12
Interest on short-term borrowings	130	210	23
Interest on term borrowings	67	72	72
Total interest expense	1,841	1,560	291
Net interest income	2,511	2,540	2,392
Provision for credit losses	150	260	95
Net interest income after provision for credit losses	2,361	2,280	2,297
Noninterest income
Fixed income	187	133	205
Deposit transactions and cash management	176	179	171
Brokerage, management fees and commissions	101	90	92
Card and digital banking fees	77	77	84
Other service charges and fees	51	54	54
Trust services and investment management	48	47	48
Mortgage banking income	35	23	68
Gain on merger termination	0	225	0
Securities gains (losses), net	(89)	(4)	18
Other income	93	103	75
Total noninterest income	679	927	815
Noninterest expense
Personnel expense	1,137	1,100	1,101
Net occupancy expense	130	123	128
Computer software	121	111	113
Operations services	94	87	87
Deposit insurance expense	64	122	32
Legal and professional fees	64	49	62
Contract employment and outsourcing	51	49	54
Advertising and public relations	48	71	50
Amortization of intangible assets	44	47	51
Equipment expense	42	42	45
Communications and delivery	32	35	37
Contributions	18	61	7
Other expense	190	182	186
Total noninterest expense	2,035	2,079	1,953
Income before income taxes	1,005	1,128	1,159
Income tax expense	211	212	247
Net income (loss)	794	916	912
Net income attributable to noncontrolling interest	19	19	12
Net income attributable to controlling interest	775	897	900
Preferred stock dividends	37	32	32
Net income available to common shareholders	738	865	868
Net income available to common shareholders	$ 738	$ 865	$ 868
Basic earnings per share (in dollars per share)	$ 1.37	$ 1.58	$ 1.62
Diluted earnings per share (in dollars per share)	$ 1.36	$ 1.54	$ 1.53
Weighted average common shares (in shares)	540,317	548,410	535,033
Diluted average common shares (in shares)	544,285	561,732	566,004