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INVESTMENT SECURITIES (Tables)
 6 Months Ended
Jun. 30, 2024
Investments [Abstract]  
Schedule of Amortized Cost and Fair Value of Investment Securities
The following tables include the amortized cost and fair value of investment securities at June 30, 2024 and December 31, 2023.

Amortized Cost and Fair Value - Investment Securities
dollars in millions June 30, 2024
Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Investment securities available for sale
U.S. Treasury$11,818 $3 $(70)$11,751 
Government agency99 — (2)97 
Residential mortgage-backed securities12,561 33 (619)11,975 
Commercial mortgage-backed securities2,938 1 (212)2,727 
Corporate bonds526 — (40)486 
Municipal bonds17 — — 17 
Total investment securities available for sale$27,959 $37 $(943)$27,053 
Investment in marketable equity securities$75 $13 $(10)$78 
Investment securities held to maturity
U.S. Treasury$481 $— $(41)$440 
Government agency1,510 — (143)1,367 
Residential mortgage-backed securities4,793 5 (705)4,093 
Commercial mortgage-backed securities3,450 — (668)2,782 
Supranational securities299 — (37)262 
Other2 — — 2 
Total investment securities held to maturity$10,535 $5 $(1,594)$8,946 
Total investment securities$38,569 $55 $(2,547)$36,077 
December 31, 2023
Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Investment securities available for sale
U.S. Treasury$10,554 $34 $(80)$10,508 
Government agency120 — (3)117 
Residential mortgage-backed securities7,154 72 (540)6,686 
Commercial mortgage-backed securities2,319 9 (197)2,131 
Corporate bonds529 — (47)482 
Municipal bonds12 — — 12 
Total investment securities available for sale$20,688 $115 $(867)$19,936 
Investment in marketable equity securities$75 $17 $(8)$84 
Investment securities held to maturity
U.S. Treasury$479 $— $(40)$439 
Government agency1,506 — (143)1,363 
Residential mortgage-backed securities4,205 — (644)3,561 
Commercial mortgage-backed securities3,489 — (614)2,875 
Supranational securities298 — (35)263 
Other2 — — 2 
Total investment securities held to maturity$9,979 $— $(1,476)$8,503 
Total investment securities$30,742 $132 $(2,351)$28,523 
Schedule of Investment Securities Maturity Information
The following table provides the amortized cost and fair value by contractual maturity. Expected maturities will differ from contractual maturities on certain securities because borrowers and issuers may have the right to call or prepay obligations with or without prepayment penalties. Residential and commercial mortgage-backed and government agency securities are stated separately as they are not due at a single maturity date.

Maturities - Debt Securities
dollars in millionsJune 30, 2024December 31, 2023
CostFair ValueCostFair Value
Investment securities available for sale
Non-amortizing securities maturing in:
One year or less$5,995 $5,961 $5,674 $5,658 
After one through five years5,962 5,921 4,996 4,959 
After five through 10 years382 351 408 369 
After 10 years22 21 17 16 
Government agency99 97 120 117 
Residential mortgage-backed securities12,561 11,975 7,154 6,686 
Commercial mortgage-backed securities2,938 2,727 2,319 2,131 
Total investment securities available for sale$27,959 $27,053 $20,688 $19,936 
Investment securities held to maturity
Non-amortizing securities maturing in:
One year or less$27 $26 $27 $26 
After one through five years1,641 1,514 1,636 1,508 
After five through 10 years624 531 622 533 
Residential mortgage-backed securities4,793 4,093 4,205 3,561 
Commercial mortgage-backed securities3,450 2,782 3,489 2,875 
Total investment securities held to maturity$10,535 $8,946 $9,979 $8,503 
Schedule of Interest and Dividends on Investment Securities
The following table presents interest and dividend income on investment securities:

Interest and Dividends on Investment Securities
dollars in millionsThree Months Ended June 30,Six Months Ended June 30,
2024202320242023
Interest income - taxable investment securities$330 $118 $611 $224 
Interest income - nontaxable investment securities— 2 — 2 
Dividend income - marketable equity securities— — 1 1 
Interest on investment securities$330 $120 $612 $227 
Schedule of Realized Losses The following table presents the gross realized losses and gains on the sales of investment securities available for sale.
Realized Losses on Debt Securities Available For Sale
dollars in millionsThree Months Ended June 30,Six Months Ended June 30,
2024202320242023
Gross realized gains on sales of investment securities available for sale$— $— $— $— 
Gross realized losses on sales of investment securities available for sale— — — (14)
Net realized losses on sales of investment securities available for sale$— $— $— $(14)
Schedule of Unrealized Loss on Available-for-sale Securities
The following table provides information regarding investment securities available for sale with unrealized losses:

Gross Unrealized Losses on Debt Securities Available For Sale
dollars in millionsJune 30, 2024
Less than 12 months12 months or moreTotal
Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Investment securities available for sale
U.S. Treasury$7,954 $(18)$1,745 $(52)$9,699 $(70)
Government agency— — 97 (2)97 (2)
Residential mortgage-backed securities5,129 (42)3,884 (577)9,013 (619)
Commercial mortgage-backed securities822 (6)1,322 (206)2,144 (212)
Corporate bonds71 (7)399 (33)470 (40)
Total$13,976 $(73)$7,447 $(870)$21,423 $(943)
December 31, 2023
Less than 12 months12 months or moreTotal
Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Investment securities available for sale
U.S. Treasury$955 $— $1,919 $(80)$2,874 $(80)
Government agency23 — 94 (3)117 (3)
Residential mortgage-backed securities293 (3)4,073 (537)4,366 (540)
Commercial mortgage-backed securities157 (1)1,386 (196)1,543 (197)
Corporate bonds89 (9)393 (38)482 (47)
Total$1,517 $(13)$7,865 $(854)$9,382 $(867)