COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Deferred purchase agreement, borrowings by client	$ 119	$ 143
Deferred purchase agreement, receivables with credit risk	1,590	1,920
Deferred purchase agreement, line of credit facility, maximum borrowing capacity	151	161
Loss contingency (up to)	10
Off-Balance Sheet Commitment
Other Commitments [Line Items]
Credit related commitments	$ 79	$ 66