FAIR VALUE MEASUREMENTS - Reconciliation of Level 3 Earn-out Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Current earn-out receivables
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 5	$ 9
Contingent earn-out recognized upon acquisition or disposition	3	5
Change in fair value of contingent consideration	0	(9)
Earn-out settlements	(3)
Ending balance	5	5
Current earn-out liabilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	2	21
Contingent earn-out recognized upon acquisition or disposition	0	5
Change in fair value of contingent consideration	(1)	(24)
Earn-out settlements	0
Ending balance	1	2
Non-current earn-out liabilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	13	10
Contingent earn-out recognized upon acquisition or disposition	0	3
Change in fair value of contingent consideration	0	0
Earn-out settlements	0
Ending balance	$ 13	$ 13