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BUSINESS OPERATING SEGMENTS - Schedule of Business Operating Segments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Net interest income | $ 6,012 | $ 4,512 | $ 4,586
Noninterest income | 2,009 | 2,135 | 2,319
Total revenue | 8,021 | 6,647 | 6,905
Noninterest expense | 4,892 | 4,081 | 3,991
Profit (loss) before provision for credit losses | 3,129 | 2,566 | 2,914
Provision (benefit) for credit losses | 474 | (411) | 1,616
Income before income tax expense | 2,655 | 2,977 | 1,298
Income tax expense | 582 | 658 | 241
NET INCOME | 2,073 | 2,319 | 1,057
Total average assets | 215,061 | 185,106 | 176,442
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Noninterest income | 2,009 | 2,135 | 2,319
Operating Segments | Consumer Banking |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income | 4,043 | 3,562 | 3,311
Noninterest income | 1,063 | 1,223 | 1,655
Total revenue | 5,106 | 4,785 | 4,966
Noninterest expense | 3,391 | 2,987 | 2,964
Profit (loss) before provision for credit losses | 1,715 | 1,798 | 2,002
Provision (benefit) for credit losses | 226 | 185 | 288
Income before income tax expense | 1,489 | 1,613 | 1,714
Income tax expense | 381 | 410 | 429
NET INCOME | 1,108 | 1,203 | 1,285
Total average assets | 86,147 | 75,509 | 72,022
Operating Segments | Commercial Banking |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income | 2,103 | 1,706 | 1,643
Noninterest income | 845 | 809 | 595
Total revenue | 2,948 | 2,515 | 2,238
Noninterest expense | 1,223 | 973 | 860
Profit (loss) before provision for credit losses | 1,725 | 1,542 | 1,378
Provision (benefit) for credit losses | 46 | 156 | 398
Income before income tax expense | 1,679 | 1,386 | 980
Income tax expense | 375 | 300 | 206
NET INCOME | 1,304 | 1,086 | 774
Total average assets | 74,919 | 57,617 | 60,839
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income | (134) | (756) | (368)
Noninterest income | 101 | 103 | 69
Total revenue | (33) | (653) | (299)
Noninterest expense | 278 | 121 | 167
Profit (loss) before provision for credit losses | (311) | (774) | (466)
Provision (benefit) for credit losses | 202 | (752) | 930
Income before income tax expense | (513) | (22) | (1,396)
Income tax expense | (174) | (52) | (394)
NET INCOME | (339) | 30 | (1,002)
Total average assets | $ 53,995 | $ 51,980 | $ 43,581

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