ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Tables)

6 Months Ended

Jun. 30, 2025

Equity [Abstract]

Schedule of Accumulated Other Comprehensive (Loss) Income

The following table details the components of AOCI:

Components of Accumulated Other Comprehensive Loss

dollars in millions	June 30, 2025						December 31, 2024
	Pretax		Income Taxes		Net of Income Taxes		Pretax		Income Taxes		Net of Income Taxes
Unrealized loss on securities available for sale	$	(321)	$	65	$	(256)	$	(762)	$	178	$	(584)
Unrealized loss on securities available for sale transferred to held to maturity	(6)		2		(4)		(6)		2		(4)
Defined benefit pension items	178		(46)		132		182		(47)		135
Unrealized gain on cash flow hedge derivatives	19		(5)		14		11		(3)		8
Total accumulated other comprehensive loss	$	(130)	$	16	$	(114)	$	(575)	$	130	$	(445)

The following table details the changes in the components of AOCI, net of income taxes:

Changes in Accumulated Other Comprehensive (Loss) Income by Component

dollars in millions	Unrealized loss on securities available for sale		Unrealized loss on securities available for sale transferred to held to maturity		Defined benefit pension items		Unrealized gain on cash flow hedge derivatives		Total accumulated other comprehensive loss
Balance as of December 31, 2024	$	(584)	$	(4)	$	135	$	8	$	(445)
AOCI activity before reclassifications	328		—		(3)		9		334
Amounts reclassified from AOCI to earnings	—		—		—		(3)		(3)
Other comprehensive income (loss) for the period	328		—		(3)		6		331
Balance as of June 30, 2025	$	(256)	$	(4)	$	132	$	14	$	(114)
Balance as of December 31, 2023	$	(577)	$	(5)	$	91	$	—	$	(491)
Other comprehensive loss (income) for the period	(113)		—		(8)		2		(119)
Balance as of June 30, 2024	$	(690)	$	(5)	$	83	$	2	$	(610)

The following table presents the pretax and after tax components of other comprehensive income:

Other Comprehensive Income (Loss) by Component

dollars in millions	Three Months Ended June 30,
	2025						2024
	Pretax		Income Taxes		Net of Income Taxes		Pretax		Income Taxes		Net of Income Taxes		Income Statement Line Items
Unrealized loss on securities available for sale:
Other comprehensive income (loss) on securities available for sale	$	119	$	(30)	$	89	$	(30)	$	8	$	(22)
Defined benefit pension items:
Other comprehensive loss for defined benefit pension items	$	(4)	$	1	$	(3)	$	(10)	$	2	$	(8)
Unrealized gain on cash flow hedge derivatives:
AOCI activity before reclassifications	$	—	$	(1)	$	(1)	$	3	$	(1)	$	2
Amounts reclassified from AOCI to earnings	(1)		1		—		—		—		—		Interest and fees on loans
Other comprehensive (loss) income on cash flow hedge derivatives	$	(1)	$	—	$	(1)	$	3	$	(1)	$	2
Total other comprehensive income (loss)	$	114	$	(29)	$	85	$	(37)	$	9	$	(28)

dollars in millions	Six Months Ended June 30,
	2025						2024
	Pretax		Income Taxes		Net of Income Taxes		Pretax		Income Taxes		Net of Income Taxes		Income Statement Line Items
Unrealized loss on securities available for sale:
Other comprehensive income (loss) on securities available for sale	$	441	$	(113)	$	328	$	(154)	$	41	$	(113)
Defined benefit pension items:
Other comprehensive loss for defined benefit pension items	$	(4)	$	1	$	(3)	$	(10)	$	2	$	(8)
Unrealized gain on cash flow hedge derivatives:
AOCI activity before reclassifications	$	12	$	(3)	$	9	$	3	$	(1)	$	2
Amounts reclassified from AOCI to earnings	(4)		1		(3)		—		—		—		Interest and fees on loans
Other comprehensive income on cash flow hedge derivatives	$	8	$	(2)	$	6	$	3	$	(1)	$	2
Total other comprehensive income (loss)	$	445	$	(114)	$	331	$	(161)	$	42	$	(119)