Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
INTEREST INCOME:
Loans and leases	$ 393	$ 383
Securities and money market investments	36	40
Total interest income	429	423
INTEREST EXPENSE:
Interest-bearing checking and money market accounts	8	9
Savings accounts	8	6
Certificates of deposit	11	18
Borrowed funds	70	72
Total interest expense	97	105
Net interest income	332	318
Provision for credit losses	(2)	4
Net interest income after provision for credit losses	334	314
NON-INTEREST INCOME:
Fee income	6	5
Bank-owned life insurance	7	7
Net loss on securities	(1)
Other	2	2
Total non-interest income	14	14
Operating expenses:
Compensation and benefits	80	78
Occupancy and equipment	23	21
General and administrative	31	33
Total operating expenses	134	132
Merger-related expenses	7
Total non-interest expense	141	132
Income before income taxes	207	196
Income tax expense	52	51
Net income	155	145
Preferred stock dividends	8	8
Net income available to common shareholders	$ 147	$ 137
Basic earnings per common share	$ 0.31	$ 0.29
Diluted earnings per common share	$ 0.31	$ 0.29
Net income	$ 155	$ 145
Other comprehensive income (loss), net of tax:
Change in net unrealized gain (loss) on securities available-for-sale, net of tax of $82; and $41, respectively	(215)	(108)
Change in pension and post-retirement obligations, net of tax of $0; and $(1), respectively		(3)
Change in net unrealized (loss) gain on cash flow hedges, net of tax of $(4); and $(1), respectively	12	3
Reclassification adjustment for defined benefit pension plan net of tax of $0; and $0, respectively		1
Reclassification adjustment for net gain on cash flow hedges included in net income, net of tax $(2); and $(2), respectively	4	4
Total other comprehensive income (loss), net of tax	(199)	(97)
Total comprehensive income, net of tax	$ (44)	$ 48