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BUSINESS SEGMENTS - Schedule of Business Operating Segments (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Net interest income | $ 1,391 | $ 1,442
Noninterest income | 544 | 517
Total revenue | 1,935 | 1,959
Direct expenses | 1,314 | 1,358
Indirect expenses | 0 | 0
Total noninterest expense | 1,314 | 1,358
Profit (loss) before provision for credit losses | 621 | 601
Credit provision | 153 | 171
Income before income tax expense | 468 | 430
Income tax expense | 95 | 96
NET INCOME | 373 | 334
Total average assets | 216,309 | 220,770
Operating Segments | Consumer Banking |  |
Segment Reporting Information [Line Items] |  |
Net interest income | 1,193 | 1,093
Noninterest income | 297 | 258
Total revenue | 1,490 | 1,351
Direct expenses | 669 | 576
Indirect expenses | 285 | 327
Total noninterest expense | 954 | 903
Profit (loss) before provision for credit losses | 536 | 448
Credit provision | 86 | 81
Income before income tax expense | 450 | 367
Income tax expense | 114 | 95
NET INCOME | 336 | 272
Total average assets | 77,534 | 73,833
Depreciation and amortization | 31 | 27
Operating Segments | Commercial Banking |  |
Segment Reporting Information [Line Items] |  |
Net interest income | 441 | 514
Noninterest income | 215 | 227
Total revenue | 656 | 741
Direct expenses | 218 | 213
Indirect expenses | 109 | 104
Total noninterest expense | 327 | 317
Profit (loss) before provision for credit losses | 329 | 424
Credit provision | 77 | 81
Income before income tax expense | 252 | 343
Income tax expense | 56 | 84
NET INCOME | 196 | 259
Total average assets | 65,366 | 70,100
Depreciation and amortization | 5 | 7
Operating Segments | Non-Core |  |
Segment Reporting Information [Line Items] |  |
Net interest income | (15) | (37)
Noninterest income | 0 | 0
Total revenue | (15) | (37)
Direct expenses | 0 | 1
Indirect expenses | 16 | 24
Total noninterest expense | 16 | 25
Profit (loss) before provision for credit losses | (31) | (62)
Credit provision | 37 | 19
Income before income tax expense | (68) | (81)
Income tax expense | (17) | (21)
NET INCOME | (51) | (60)
Total average assets | 6,536 | 10,554
Other |  |
Segment Reporting Information [Line Items] |  |
Net interest income | (228) | (128)
Noninterest income | 32 | 32
Total revenue | (196) | (96)
Direct expenses | 427 | 568
Indirect expenses | (410) | (455)
Total noninterest expense | 17 | 113
Profit (loss) before provision for credit losses | (213) | (209)
Credit provision | (47) | (10)
Income before income tax expense | (166) | (199)
Income tax expense | (58) | (62)
NET INCOME | (108) | (137)
Total average assets | 66,873 | 66,283
Depreciation and amortization | $ 75 | $ 77

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