COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other Commitments [Line Items]
Deferred purchase agreement, borrowings by client	$ 241	$ 166
Deferred purchase agreement, receivables with credit risk	1,830	1,740
Deferred purchase agreement, line of credit facility, maximum borrowing capacity	37	59
Loss contingency (up to)	20
Off-Balance Sheet Commitment
Other Commitments [Line Items]
Credit related commitments	$ 340	$ 79