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Accumulated Other Comprehensive (Loss) Income (Tables)
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive (Loss) Income
The following table details the components of Accumulated Other Comprehensive (Loss) Income (“AOCI”):

Components of Accumulated Other Comprehensive (Loss) Income
dollars in millionsDecember 31, 2023December 31, 2022
PretaxIncome
Taxes
Net of Income TaxesPretaxIncome
Taxes
Net of Income Taxes
Unrealized loss on securities available for sale$(752)$175 $(577)$(972)$233 $(739)
Unrealized loss on securities available for sale transferred to held to maturity(7)(5)(8)(6)
Defined benefit pension items122 (31)91 13 (3)10 
Total accumulated other comprehensive loss$(637)$146 $(491)$(967)$232 $(735)

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 millionsUnrealized (loss) gain on securities available for saleUnrealized (loss) gain on securities available for sale transferred to held to maturityNet change in defined benefit pension itemsTotal accumulated other comprehensive (loss) income
Balance as of December 31, 2022$(739)$(6)$10 $(735)
AOCI activity before reclassifications143 — 81 224 
Amounts reclassified from AOCI to earnings19 — 20 
Other comprehensive (loss) income for the period162 81 244 
Balance as of December 31, 2023$(577)$(5)$91 $(491)
Balance as of December 31, 2021$(9)$(7)$26 $10 
AOCI activity before reclassifications(730)— (25)(755)
Amounts reclassified from AOCI to earnings— 10 
Other comprehensive (loss) income for the period(730)(16)(745)
Balance as of December 31, 2022$(739)$(6)$10 $(735)
The following table presents the pretax and after tax components of other comprehensive income:
Other Comprehensive Income (Loss) by Component

dollars in millionsYear Ended December 31,
20232022
PretaxIncome
Taxes
Net of Income TaxesPretaxIncome
Taxes
Net of Income TaxesIncome Statement Line Items
Unrealized gain (loss) on securities available for sale:
AOCI activity before reclassifications$194 $(51)$143 $(960)$230 $(730)
Amounts reclassified from AOCI to earnings26 (7)19 — — — 
$26 million realized loss on sales of investment securities available for sale
Other comprehensive income (loss) on securities available for sale$220 $(58)$162 $(960)$230 $(730)
Unrealized loss on securities available for sale transferred to held to maturity:
AOCI activity before reclassifications$— $— $— $— $— $— 
Amounts reclassified from AOCI to earnings— — Interest on investment securities
Other comprehensive income on securities available for sale transferred to held to maturity$$— $$$— $
Defined benefit pension items:
Actuarial gain (loss)$109 $(28)$81 $(33)$$(25)
Amounts reclassified from AOCI to earnings— — — 12 (3)Other noninterest expense
Other comprehensive income (loss) for defined benefit pension items$109 $(28)$81 $(21)$$(16)
Total other comprehensive income (loss)$330 $(86)$244 $(980)$235 $(745)