Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
INTEREST INCOME:
Loans and leases	$ 442	$ 376	$ 1,259	$ 1,145
Securities and money market investments	67	39	152	124
Total interest income	509	415	1,411	1,269
INTEREST EXPENSE:
Interest-bearing checking and money market accounts	72	8	104	24
Savings accounts	15	7	33	20
Certificates of deposit	23	11	46	43
Borrowed funds	73	71	211	215
Total interest expense	183	97	394	302
Net interest income	326	318	1,017	967
Provision for credit losses	2	(1)	9	(1)
Net interest income after provision for credit losses	324	319	1,008	968
NON-INTEREST INCOME:
Fee income	5	6	17	17
Bank-owned life insurance	10	7	24	22
Net loss on securities	(1)		(2)
Other	3	2	10	6
Total non-interest income	17	15	49	45
Operating expenses:
Compensation and benefits	79	77	238	229
Occupancy and equipment	22	22	67	65
General and administrative	31	30	95	96
Total operating expenses	132	129	400	390
Merger-related expenses	4	6	15	16
Total non-interest expense	136	135	415	406
Income before income taxes	205	199	642	607
Income tax expense	53	50	164	161
Net income	152	149	478	446
Preferred stock dividends	8	9	25	25
Net income available to common shareholders	$ 144	$ 140	$ 453	$ 421
Basic earnings per common share	$ 0.31	$ 0.30	$ 0.96	$ 0.90
Diluted earnings per common share	$ 0.30	$ 0.30	$ 0.96	$ 0.90
Net income	$ 152	$ 149	$ 478	$ 446
Other comprehensive loss, net of tax:
Change in net unrealized gain (loss) on securities available-for-sale net of tax of $67; $9 $217 and $34, respectively	(176)	(23)	(567)	(89)
Change in pension and post-retirement obligations, net of tax of$0; $0; $0 and $(1), respectively		1	(1)	3
Change in net unrealized (loss) gain on cash flow hedges, net of tax of $(11); $0; $(18) and $0, respectively	28	(2)	46	1
Reclassification adjustment for defined benefit pension plan,net of tax of $0; $0; $0 and $(1), respectively	1	1	2	4
Reclassification adjustment for net gain on cash flow hedges included in net income, net of tax $1; $(2); $(1) and $(4), respectively	(2)	6	3	14
Total other comprehensive loss, net of tax	(149)	(17)	(517)	(67)
Total comprehensive income (loss), net of tax	$ 3	$ 132	$ (39)	$ 379