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Securities
12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Securities
7. Securities

The amortized cost, unrealized gains and losses, and approximate fair value of our securities available for sale and held-to-maturity securities are presented in the following tables. Gross unrealized gains and losses represent the difference between the amortized cost and the fair value of securities on the balance sheet as of the dates indicated. Accordingly, the amount of these gains and losses may change in the future as market conditions change.
 20232022
December 31,
Dollars in millions
Amortized
Cost (a)
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Amortized
Cost(a)
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
SECURITIES AVAILABLE FOR SALE
U.S. Treasury, agencies, and corporations$9,300 $6 $280 $9,026 $10,044 $— $629 $9,415 
Agency residential collateralized mortgage obligations
18,911 4 3,437 15,478 20,180 — 3,747 16,433 
Agency residential mortgage-backed securities4,189  600 3,589 4,616 — 696 3,920 
Agency commercial mortgage-backed securities 10,295  1,203 9,092 10,712 1,365 9,349 
Other securities    — — — — 
Total securities available for sale$42,695 $10 $5,520 $37,185 $45,552 $$6,437 $39,117 
HELD-TO-MATURITY SECURITIES
Agency residential collateralized mortgage obligations
$5,170 $9 $283 $4,896 $4,586 $$283 $4,308 
Agency residential mortgage-backed securities165  13 152 181 — 16 165 
Agency commercial mortgage-backed securities2,473 1 204 2,270 2,522 208 2,315 
Asset-backed securities(b)
738  29 709 1,407 — 96 1,311 
Other securities29   29 14 — — 14 
Total held-to-maturity securities$8,575 $10 $529 $8,056 $8,710 $$603 $8,113 
 
(a)Amortized cost amounts exclude accrued interest receivable which is recorded within “other assets” on the balance sheet. At December 31, 2023, accrued interest receivable on available for sale securities and held-to-maturity securities totaled $64 million and $25 million, respectively. At December 31, 2022, accrued interest receivable on available for sale securities and held-to-maturity securities totaled $67 million and $88 million, respectively.
(b)Includes $731 million of securities as of December 31, 2023, and $1.4 billion of securities as of December 31, 2022, related to the purchase of senior notes from a securitization collateralized by sold indirect auto loans.

The following table summarizes securities in an unrealized loss position for which an allowance for credit losses has not been recorded as of December 31, 2023, and December 31, 2022:
 Duration of Unrealized Loss Position  
 Less than 12 Months12 Months or LongerTotal
Dollars in millionsFair Value
Gross
Unrealized
Losses
Fair Value
Gross
Unrealized
Losses
Fair Value
Gross
Unrealized
Losses
December 31, 2023
Securities available for sale:
U.S. Treasury, agencies, and corporations$ $ $8,532 $280 $8,532 $280 
Agency residential collateralized mortgage obligations  14,979 3,437 14,979 3,437 
Agency residential mortgage-backed securities24  3,562 600 3,586 600 
Agency commercial mortgage-backed securities 891 49 8,201 1,154 9,092 1,203 
Held-to-maturity securities:
Agency residential collateralized mortgage obligations1,123 30 3,070 253 4,193 283 
Agency residential mortgage-backed securities  152 13 152 13 
Agency commercial mortgage-backed securities  2,199 204 2,199 204 
Asset-backed securities  709 29 709 29 
Other securities17  
(a)
12  29  
Total securities in an unrealized loss position$2,055 $79 $41,416 $5,970 $43,471 $6,049 
December 31, 2022      
Securities available for sale:
U.S. Treasury, agencies, and corporations$494 $48 $8,920 $581 $9,414 $629 
Agency residential collateralized mortgage obligations3,114 377 13,317 3,370 16,431 3,747 
Agency residential mortgage-backed securities579 31 3,338 665 3,917 696 
Agency commercial mortgage-backed securities 4,511 282 4,791 1,083 9,302 1,365 
Held-to-maturity securities:
Agency residential collateralized mortgage obligations2,659 178 726 105 3,385 283 
Agency residential mortgage-backed securities165 16 — — 165 16 
Agency commercial mortgage-backed securities 2,243 208 — — 2,243 208 
Asset-backed securities— 1,309 96 1,310 96 
Other securities10 — 
(b)
— 14 — 
Total securities in an unrealized loss position$13,776 $1,140 $32,405 $5,900 $46,181 $7,040 
(a)At December 31, 2023, gross unrealized losses totaled less than $1 million for other securities held to maturity with a loss duration of less than 12 months.
(b)At December 31, 2022, gross unrealized losses totaled less than $1 million for other securities held to maturity with a loss duration of less than 12 months
Based on our evaluation at December 31, 2023, an allowance for credit losses has not been recorded nor have unrealized losses been recognized into income. The issuers of the securities are of high credit quality and have a history of no credit losses, management does not intend to sell and it is likely that management will not be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely attributed to changes in interest rates and other market conditions. The issuers continue to make timely principal and interest payments.
During the year ended December 31, 2023, we recognized $4 million in gross realized gains and $8 million in gross realized losses from the sale of securities available for sale. For the years ended December 31, 2022 and December 31, 2021, we had no realized gains or losses from the sale of securities available for sale.

At December 31, 2023, securities available-for-sale and held-to-maturity securities totaling $37.4 billion were pledged to secure securities sold under repurchase agreements, to secure public and trust deposits, to facilitate access to secured funding, and for other purposes required or permitted by law.
The following table shows securities by remaining maturity. CMOs, other mortgage-backed securities, and asset-backed securities in the available for sale portfolio and held-to-maturity portfolio are presented based on their expected average lives. The remaining securities, in both the available-for-sale and held-to-maturity portfolios, are presented based on their remaining contractual maturity. Actual maturities may differ from expected or contractual maturities since borrowers have the right to prepay obligations with or without prepayment penalties.
 Securities
Available for Sale
Held-to-Maturity
Securities
December 31, 2023
Amortized
Cost
Fair
Value
Amortized
Cost
Fair
Value
Dollars in millions
Due in one year or less$8,044 $7,813 $755 $726 
Due after one through five years8,336 7,679 3,740 3,537 
Due after five through ten years18,128 15,268 2,851 2,632 
Due after ten years8,187 6,425 1,229 1,161 
Total$42,695 $37,185 $8,575 $8,056