CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 465	$ 485	$ 439
Securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $4, $16 and $(79)	14	57	(277)
Reclassification adjustment for (gains) losses included in net income, net of tax expense (benefit) of $(7), $(15) and $0	27	52	0
Derivative instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $(4), $(2) and $(9)	(14)	(8)	(30)
Reclassification adjustment for gains (losses) included in net income, net of tax expense (benefit) of $9, $5 and $2	32	19	8
Pension and postretirement benefit obligations:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $(2), $(1) and $(1)	7	2	4
Other Comprehensive Income (Loss)	66	122	(295)
Comprehensive Income (Loss)	$ 531	$ 607	$ 144