BUSINESS ACQUISITIONS (Details) - USD ($)			3 Months Ended		9 Months Ended
	Jun. 20, 2023	Apr. 17, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Consideration					$ 699,000,000
Goodwill acquired during the period					513,000,000
Cash acquired from acquisition			$ 0	$ 0	1,000,000	$ 4,000,000
Cash paid for business acquisitions			2,000,000	$ 0	612,000,000	110,000,000
Goodwill			7,732,000,000		7,732,000,000		$ 7,220,000,000
Goodwill, expected tax deductible amount			244,000,000		244,000,000
Business acquisitions, net of cash acquired			2,000,000		611,000,000	$ 106,000,000
Technology
Business Acquisition [Line Items]
Intangible assets			145,000,000		145,000,000
Customer Relationships
Business Acquisition [Line Items]
Intangible assets			$ 63,000,000		$ 63,000,000
New York-Presbyterian
Business Acquisition [Line Items]
Cash paid for business acquisitions		$ 275,000,000
Goodwill		222,000,000
Goodwill, expected tax deductible amount		222,000,000
New York-Presbyterian | Customer Relationships
Business Acquisition [Line Items]
Intangible assets		$ 53,000,000
Intangible assets, useful life		15 years
Haystack Oncology, Inc.
Business Acquisition [Line Items]
Consideration	$ 392,000,000
Cash acquired from acquisition	1,000,000
Cash paid for business acquisitions	304,000,000
Contingent consideration	88,000,000
Goodwill	269,000,000
Deferred tax liabilities	25,000,000
Operating lease right-of-use assets	8,000,000
Operating lease liabilities	8,000,000
Property, plant and equipment, net	3,000,000
Haystack Oncology, Inc. | Additional, Based on Revenue
Business Acquisition [Line Items]
Contingent consideration arrangements	100,000,000
Haystack Oncology, Inc. | Additional, Reimbursement Coverage
Business Acquisition [Line Items]
Contingent consideration arrangements	50,000,000
Haystack Oncology, Inc. | Technology
Business Acquisition [Line Items]
Intangible assets	$ 145,000,000
Intangible assets, useful life	15 years