DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($) segment	Dec. 31, 2024 USD ($)
Product Information [Line Items]
Number of reportable segments | segment	1
Prepayments offsetting accrued health insurance costs	$ 118	$ 60
ERTC receivables	389	831
ERTC distributed	20	72
Operating lease right-of-use asset	37	24
Atlanta Corporate Center
Product Information [Line Items]
Future minimum lease payments	40
Operating lease right-of-use asset	19
Operating lease liabilities	18
Health Care
Product Information [Line Items]
Prepayments offsetting accrued health insurance costs	$ 27	$ 90
Non-US | Revenue | Foreign Sales
Product Information [Line Items]
Percent of concentration risk (less than)	1.00%