Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
INTEREST INCOME:
Loans and leases	$ 1,848	$ 1,525	$ 1,542
Securities and money market investments	244	164	166
Total interest income	2,092	1,689	1,708
INTEREST EXPENSE:
Interest-bearing checking and money market accounts	226	31	57
Savings accounts	60	28	32
Certificates of deposit	97	55	217
Borrowed funds	313	286	302
Total interest expense	696	400	608
Net interest income	1,396	1,289	1,100
Provision for credit losses	133	3	62
Net interest income after provision for credit loan losses	1,263	1,286	1,038
NON-INTEREST INCOME:
Fee income	27	23	22
Bank-owned life insurance	32	29	32
Net (loss) gain on securities	(2)		1
Net return on mortgage servicing rights	6
Net gain on loan sales	5
Loan administration income	3
Bargain purchase gain	159
Other	17	9	6
Total non-interest income	247	61	61
Operating expenses:
Compensation and benefits	354	303	301
Occupancy and equipment	92	88	86
General and administrative	158	127	124
Total operating expenses	604	518	511
Intangible asset amortization	5
Merger-related expenses	75	23
Total non-interest expense	684	541	511
Income before income taxes	826	806	588
Income tax expense	176	210	77
Net income	650	596	511
Preferred stock dividends	33	33	33
Net income available to common shareholders	$ 617	$ 563	$ 478
Basic earnings per common share	$ 1.26	$ 1.20	$ 1.02
Diluted earnings per common share	$ 1.26	$ 1.20	$ 1.02
Net income	$ 650	$ 596	$ 511
Other comprehensive income (loss), net of tax:
Change in net unrealized (loss) gain on securities available for sale, net of tax of $223; $42; and $(16), respectively	(581)	(112)	42
Change in pension and post-retirement obligations, net of tax of $6; $(8); and $(2)	(17)	23	(5)
Change in net unrealizedgain (loss) on cash flow hedges, net of tax of $(24); $(2) and 16$, respectively	64	6	(42)
Less: Reclassification adjustment for sales of available-for-sale securities, net of tax of $-; $-; and $-;, respectively			(1)
Reclassification adjustment for defined benefit pension plan, net of tax of $0; $(2) and $(2), respectively	2	5	5
Reclassification adjustment for net gain on cash flow hedges included in net income, net of tax$1; $(7);and $(3) , respectively	(3)	18	8
Total other comprehensive (loss) income, net of tax	(535)	(60)	7
Total comprehensive income, net of tax	$ 115	$ 536	$ 518