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COMMITMENTS AND CONTINGENCIES - Schedule of Outstanding Off-balance sheet Arrangements (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Other Commitments [Line Items] |  |
Commitment amount | $ 89,230 | $ 86,351
Commitments to extend credit |  |
Other Commitments [Line Items] |  |
Commitment amount | 87,127 | 84,206
Letters of credit |  |
Other Commitments [Line Items] |  |
Commitment amount | 1,977 | 1,998
Risk participation agreements |  |
Other Commitments [Line Items] |  |
Commitment amount | 17 | 39
Loans sold with recourse |  |
Other Commitments [Line Items] |  |
Commitment amount | 85 | 82
Marketing rights |  |
Other Commitments [Line Items] |  |
Commitment amount | $ 24 | $ 26

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