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INVESTMENT SECURITIES - Schedule of Gross Unrealized Losses and Fair Value by Investment Category (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 7,198 | $ 3,621
12 months or more | 9,104 | 11,046
Total | 16,302 | 14,667
Gross Unrealized Losses |  |
Less than 12 months | (178) | (28)
12 months or more | (1,231) | (1,300)
Total | (1,409) | (1,328)
U.S. Treasury and agency obligations |  |
Fair Value |  |
Less than 12 months | 2,343 | 1,899
12 months or more | 456 | 431
Total | 2,799 | 2,330
Gross Unrealized Losses |  |
Less than 12 months | (68) | (12)
12 months or more | (42) | (39)
Total | (110) | (51)
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 1,766 | 958
12 months or more | 2,203 | 2,269
Total | 3,969 | 3,227
Gross Unrealized Losses |  |
Less than 12 months | (50) | (12)
12 months or more | (459) | (413)
Total | (509) | (425)
Tax-exempt municipal securities |  |
Fair Value |  |
Less than 12 months | 97 | 160
12 months or more | 405 | 523
Total | 502 | 683
Gross Unrealized Losses |  |
Less than 12 months | (1) | (1)
12 months or more | (21) | (21)
Total | (22) | (22)
Residential |  |
Fair Value |  |
Less than 12 months | 130 | 0
12 months or more | 343 | 373
Total | 473 | 373
Gross Unrealized Losses |  |
Less than 12 months | (2) | 0
12 months or more | (62) | (66)
Total | (64) | (66)
Commercial |  |
Fair Value |  |
Less than 12 months | 58 | 18
12 months or more | 992 | 1,303
Total | 1,050 | 1,321
Gross Unrealized Losses |  |
Less than 12 months | (1) | 0
12 months or more | (84) | (126)
Total | (85) | (126)
Asset-backed securities |  |
Fair Value |  |
Less than 12 months | 419 | 120
12 months or more | 436 | 1,364
Total | 855 | 1,484
Gross Unrealized Losses |  |
Less than 12 months | (5) | (1)
12 months or more | (19) | (43)
Total | (24) | (44)
Corporate debt securities |  |
Fair Value |  |
Less than 12 months | 2,385 | 466
12 months or more | 4,269 | 4,783
Total | 6,654 | 5,249
Gross Unrealized Losses |  |
Less than 12 months | (51) | (2)
12 months or more | (544) | (592)
Total | $ (595) | $ (594)

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