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INVESTMENT SECURITIES - Gross Unrealized Losses and Fair Values of Securities (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 4,225 | $ 4,990
12 months or more | 8,950 | 2,547
Total | 13,175 | 7,537
Gross Unrealized Losses |  |
Less than 12 months | (389) | (94)
12 months or more | (1,517) | (67)
Total | (1,906) | (161)
U.S. Treasury and agency obligations |  |
Fair Value |  |
Less than 12 months | 146 | 201
12 months or more | 380 | 355
Total | 526 | 556
Gross Unrealized Losses |  |
Less than 12 months | (6) | (3)
12 months or more | (52) | (7)
Total | (58) | (10)
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 1,114 | 2,082
12 months or more | 1,802 | 556
Total | 2,916 | 2,638
Gross Unrealized Losses |  |
Less than 12 months | (131) | (49)
12 months or more | (419) | (20)
Total | (550) | (69)
Tax-exempt municipal securities |  |
Fair Value |  |
Less than 12 months | 79 | 68
12 months or more | 625 | 34
Total | 704 | 102
Gross Unrealized Losses |  |
Less than 12 months | (3) | (1)
12 months or more | (51) | (1)
Total | (54) | (2)
Residential |  |
Fair Value |  |
Less than 12 months | 127 | 358
12 months or more | 277 | 8
Total | 404 | 366
Gross Unrealized Losses |  |
Less than 12 months | (15) | (6)
12 months or more | (63) | 0
Total | (78) | (6)
Commercial |  |
Fair Value |  |
Less than 12 months | 252 | 295
12 months or more | 1,156 | 400
Total | 1,408 | 695
Gross Unrealized Losses |  |
Less than 12 months | (13) | (4)
12 months or more | (141) | (7)
Total | (154) | (11)
Asset-backed securities |  |
Fair Value |  |
Less than 12 months | 598 | 530
12 months or more | 1,226 | 425
Total | 1,824 | 955
Gross Unrealized Losses |  |
Less than 12 months | (30) | (3)
12 months or more | (51) | (1)
Total | (81) | (4)
Corporate debt securities |  |
Fair Value |  |
Less than 12 months | 1,909 | 1,456
12 months or more | 3,484 | 769
Total | 5,393 | 2,225
Gross Unrealized Losses |  |
Less than 12 months | (191) | (28)
12 months or more | (740) | (31)
Total | $ (931) | $ (59)

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