RESTRUCTURING ACTIVITIES AND IMPAIRMENT CHARGES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 8	$ 1	$ 14	$ 16
Invigorate Program
Restructuring Cost and Reserve [Line Items]
Target percent for annual productivity savings	3.00%		3.00%
Invigorate Program | Accounts Payable and Accrued Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 16		$ 16		$ 12
Invigorate Program | Cost of services
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	4		8	9
Invigorate Program | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 4		$ 6	$ 12