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COMMITMENTS AND CONTINGENCIES - Schedule of Outstanding Off-balance sheet Arrangements (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Other Commitments [Line Items] |  |
Commitment amount | $ 96,295 | $ 98,314
Commitments to extend credit |  |
Other Commitments [Line Items] |  |
Commitment amount | 94,201 | 96,076
Letters of credit |  |
Other Commitments [Line Items] |  |
Commitment amount | 1,977 | 2,119
Loans sold with recourse |  |
Other Commitments [Line Items] |  |
Commitment amount | 96 | 92
Marketing rights |  |
Other Commitments [Line Items] |  |
Commitment amount | 18 | 23
Risk participation agreements |  |
Other Commitments [Line Items] |  |
Commitment amount | $ 3 | $ 4

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