CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 117	$ 122
Debt securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $9 and $(4)	33	(13)
Derivative instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $2 and $(3)	8	(9)
Reclassification adjustment for gains (losses) included in net income, net of tax expense (benefit) of $2 and $2	6	7
Pension and postretirement benefit obligations:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $0 and $0	1	0
Other Comprehensive Income (Loss)	48	(15)
Comprehensive Income (Loss)	$ 165	$ 107