INTANGIBLE ASSETS AND GOODWILL - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Expected aggregate future amortization expense of intangible assets for 2024	$ 206,000,000
Expected aggregate future amortization expense of intangible assets for 2025	178,000,000
Expected aggregate future amortization expense of intangible assets for 2026	148,000,000
Expected aggregate future amortization expense of intangible assets for 2027	126,000,000
Expected aggregate future amortization expense of intangible assets for 2028	94,000,000
Contracts acquired in business combinations and other
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	226,000,000	$ 197,000,000	$ 165,000,000
Contracts acquired in business combinations and other | Reimbursed Expenses
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 122,000,000	$ 83,000,000	$ 62,000,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Range of amortization life of intangible assets	15 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Range of amortization life of intangible assets	30 years