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INVESTMENT SECURITIES - Schedule of Gross Unrealized Losses and Fair Value by Investment Category (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 4,616 | $ 7,198
12 months or more | 8,366 | 9,104
Total | 12,982 | 16,302
Gross Unrealized Losses |  |
Less than 12 months | (53) | (178)
12 months or more | (1,014) | (1,231)
Total | (1,067) | (1,409)
U.S. Treasury and agency obligations |  |
Fair Value |  |
Less than 12 months | 1,958 | 2,343
12 months or more | 422 | 456
Total | 2,380 | 2,799
Gross Unrealized Losses |  |
Less than 12 months | (17) | (68)
12 months or more | (32) | (42)
Total | (49) | (110)
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 1,274 | 1,766
12 months or more | 2,142 | 2,203
Total | 3,416 | 3,969
Gross Unrealized Losses |  |
Less than 12 months | (22) | (50)
12 months or more | (399) | (459)
Total | (421) | (509)
Tax-exempt municipal securities |  |
Fair Value |  |
Less than 12 months | 58 | 97
12 months or more | 370 | 405
Total | 428 | 502
Gross Unrealized Losses |  |
Less than 12 months | (1) | (1)
12 months or more | (23) | (21)
Total | (24) | (22)
Residential |  |
Fair Value |  |
Less than 12 months | 46 | 130
12 months or more | 331 | 343
Total | 377 | 473
Gross Unrealized Losses |  |
Less than 12 months | 0 | (2)
12 months or more | (54) | (62)
Total | (54) | (64)
Commercial |  |
Fair Value |  |
Less than 12 months | 95 | 58
12 months or more | 874 | 992
Total | 969 | 1,050
Gross Unrealized Losses |  |
Less than 12 months | 0 | (1)
12 months or more | (61) | (84)
Total | (61) | (85)
Asset-backed securities |  |
Fair Value |  |
Less than 12 months | 181 | 419
12 months or more | 329 | 436
Total | 510 | 855
Gross Unrealized Losses |  |
Less than 12 months | (3) | (5)
12 months or more | (13) | (19)
Total | (16) | (24)
Corporate debt securities |  |
Fair Value |  |
Less than 12 months | 1,004 | 2,385
12 months or more | 3,898 | 4,269
Total | 4,902 | 6,654
Gross Unrealized Losses |  |
Less than 12 months | (10) | (51)
12 months or more | (432) | (544)
Total | $ (442) | $ (595)

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