COMMITMENTS AND CONTINGENCIES - Schedule of Outstanding Off-balance sheet Arrangements (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Commitment amount	$ 97,609	$ 86,351
Commitments to extend credit
Other Commitments [Line Items]
Commitment amount	95,206	84,206
Letters of credit
Other Commitments [Line Items]
Commitment amount	2,147	1,998
Risk participation agreements
Other Commitments [Line Items]
Commitment amount	3	39
Loans sold with recourse
Other Commitments [Line Items]
Commitment amount	230	82
Marketing rights
Other Commitments [Line Items]
Commitment amount	$ 23	$ 26