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Securities (Tables)
 9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Details of 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.

 September 30, 2022December 31, 2021
Dollars in millions
Amortized
Cost (a)
Gross Unrealized GainsGross Unrealized Losses
Fair
Value
Amortized
Cost (b)
Gross Unrealized GainsGross Unrealized Losses
Fair
Value
SECURITIES AVAILABLE FOR SALE
U.S. Treasury, agencies, and corporations$10,062 $— $676 $9,386 $9,573 $— $101 $9,472 
Agency residential collateralized mortgage obligations
20,706 — 3,469 17,237 21,430 99 410 21,119 
Agency residential mortgage-backed securities4,742 — 757 3,985 5,137 37 52 5,122 
Agency commercial mortgage-backed securities 10,780 2 1,391 9,391 9,753 188 290 9,651 
Other securities1 — — 1 — — — — 
Total securities available for sale $46,291 $2 $6,293 $40,000 $45,893 $324 $853 $45,364 
HELD-TO-MATURITY SECURITIES
Agency residential collateralized mortgage obligations
$3,818 $— $251 $3,567 $2,196 $33 $— $2,229 
Agency residential mortgage-backed securities185 — 18 167 164 6 — 170 
Agency commercial mortgage-backed securities2,524 1 190 2,335 2,678 118 — 2,796 
Asset-backed securities (c)
1,621 — 108 1,513 2,485 — 31 2,454 
Other securities15 — 1 14 16 — — 16 
Total held-to-maturity securities$8,163 $1 568 $7,596 $7,539 $157 $31 $7,665 
(a)Amortized cost amounts exclude accrued interest receivable which is recorded within Other Assets on the balance sheet. At September 30, 2022, accrued interest receivable on available for sale securities and held-to-maturity securities totaled $66 million and $18 million, respectively.
(b)Amortized cost amounts exclude accrued interest receivable which is recorded within Other Assets on the balance sheet. At December 31, 2021, accrued interest receivable on available for sale securities and held-to-maturity securities totaled $59 million and $15 million, respectively.
(c)Includes $1.6 billion of securities as of September 30, 2022, and $2.5 billion of securities as of December 31, 2021, related to the purchase of senior notes from a securitization collateralized by sold indirect auto loans.
Schedule of Securities in an Unrealized Loss Position
The following table summarizes securities in an unrealized loss position for which an allowance for credit losses has not been recorded as of September 30, 2022, and December 31, 2021.

 Duration of Unrealized Loss Position  
 Less than 12 Months12 Months or LongerTotal
Dollars in millions
Fair
Value
Gross
Unrealized
Losses
Fair
Value
Gross
Unrealized
Losses
Fair
Value
Gross
Unrealized
Losses
September 30, 2022
Securities available for sale:
U.S Treasury, agencies, and corporations
$1,197 $94 $8,189 $582 $9,386 $676 
Agency residential collateralized mortgage obligations
9,673 1,489 7,562 1,980 17,235 3,469 
Agency residential mortgage-backed securities
1,584 219 2,398 538 3,982 757 
Agency commercial mortgage-backed securities
5,221 383 4,104 1,008 9,325 1,391 
Held-to-maturity securities:
Agency residential collateralized mortgage obligations
3,407 250 9 1 3,416 251 
Agency residential mortgage-backed securities
167 18 — — 167 18 
Agency commercial mortgage-backed securities
2,324 190 — — 2,324 190 
Asset-backed securities
1,511 108 1 — 
(a)
1,512 108 
Other securities
7 — 
(a)
3 1 10 1 
Total securities in an unrealized loss position$25,091 $2,751 $22,266 $4,110 $47,357 $6,861 
December 31, 2021
Securities available for sale:
U.S. Treasury, agencies, and corporations
$9,078 $98 $243 $3 $9,321 $101 
Agency residential collateralized mortgage obligations12,603 315 1,255 95 13,858 410 
Agency residential mortgage-backed securities
3,793 49 

178 3 3,971 52 
Agency commercial mortgage-backed securities 1,645 75 3,834 215 5,479 290 
Held-to-maturity securities:
Agency residential collateralized mortgage obligations96 — 
(b)
— — 96 — 
Asset-backed securities
2,450 31 1 — 
(b)
2,451 31 
Other securities
15 — 
(b)
— — 15 — 
Total securities in an unrealized loss position$29,680 $568 $5,511 $316 $35,191 $884 
    
(a)At September 30, 2022, gross unrealized losses totaled less than $1 million for other securities held-to-maturity with a loss duration of less than 12 months and asset-backed securities held-to-maturity with a loss duration of 12 months or longer.
(b)At December 31, 2021, gross unrealized losses totaled less than $1 million for other securities held-to-maturity and agency residential collateralized mortgage obligations held-to-maturity with a loss duration of less than 12 months. At December 31, 2021, gross unrealized losses totaled less than $1 million for asset backed securities held-to-maturity with a loss duration greater than 12 months or longer.
Schedule of Securities by Maturity
The following table shows our 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.

September 30, 2022Securities Available for SaleHeld to Maturity Securities
Dollars in millionsAmortized CostFair ValueAmortized CostFair Value
Due in one year or less$620 $599 $24 $23 
Due after one through five years16,918 15,566 4,526 4,203 
Due after five through ten years21,439 17,962 2,500 2,303 
Due after ten years7,314 5,873 1,113 1,067 
Total$46,291 $40,000 $8,163 $7,596