FAIR VALUE MEASUREMENTS - Additional Information (Details)	3 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jul. 01, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of debt	$ 5,800,000,000	$ 6,100,000,000
UMass Joint Venture
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Ownership percentage by noncontrolling owners				18.90%
Fair Value, Inputs, Level 3 | Contingent Consideration
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value adjustments included in earnings - realized/unrealized	3,000,000
Liability	109,000,000	106,000,000
Fair Value, Inputs, Level 3 | Contingent Consideration | Other Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liability	104,000,000	101,000,000
Fair Value, Inputs, Level 3 | Contingent Consideration | Accounts Payable and Accrued Expenses
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liability	$ 5,000,000	$ 5,000,000
Haystack Oncology, Inc. | Comparable Company Revenue Volatility
Business Acquisition [Line Items]
Measurement input	0.35
Haystack Oncology, Inc. | Discount rate
Business Acquisition [Line Items]
Measurement input	0.105
Haystack Oncology, Inc. | Additional, Based on Revenue
Business Acquisition [Line Items]
Maximum contingent consideration payment			$ 100,000,000
Haystack Oncology, Inc. | Additional, Reimbursement Coverage
Business Acquisition [Line Items]
Maximum contingent consideration payment			$ 50,000,000
Haystack Oncology, Inc. | Additional Impact | Discount rate
Business Acquisition [Line Items]
Measurement input	0.05
Haystack Oncology, Inc. | Changing Comparable Company Revenue Volatility | Comparable Company Revenue Volatility
Business Acquisition [Line Items]
Measurement input	0.25
Increase in contingent consideration liability	$ 5,000,000
Haystack Oncology, Inc. | Changing Discount Rate | Comparable Company Revenue Volatility
Business Acquisition [Line Items]
Increase in contingent consideration liability	$ 3,000,000
Haystack Oncology, Inc. | Changing Discount Rate | Discount rate
Business Acquisition [Line Items]
Measurement input	0.070