CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 147	$ 53
Securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $10 and $(36)	35	(128)
Derivative instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $1 and $(4)	4	(15)
Reclassification adjustment for gains included in net income, net of tax expense of $1 and $0	3	2
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $0 and $0	0	1
Other Comprehensive Income (Loss)	42	(140)
Comprehensive Income (Loss)	$ 189	$ (87)