BUSINESS ACQUISITIONS (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
	Jun. 20, 2023	Apr. 17, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Consideration					$ 697
Goodwill acquired during the period					511
Cash acquired from acquisition			$ 1	$ 0	1	$ 4
Cash paid for business acquisitions			579	1	610	110
Goodwill			7,733		7,733		$ 7,220
Goodwill, expected tax deductible amount			242		242
Business acquisitions, net of cash acquired			578	$ 1	609	$ 106
Technology
Business Acquisition [Line Items]
Intangible assets			145		145
Customer Relationships
Business Acquisition [Line Items]
Intangible assets			$ 63		$ 63
New York-Presbyterian
Business Acquisition [Line Items]
Cash paid for business acquisitions		$ 275
Goodwill		222
Goodwill, expected tax deductible amount		222
New York-Presbyterian | Customer Relationships
Business Acquisition [Line Items]
Intangible assets		$ 53
Intangible assets, useful life		15 years
Haystack Oncology, Inc.
Business Acquisition [Line Items]
Consideration	$ 392
Cash acquired from acquisition	1
Cash paid for business acquisitions	304
Contingent consideration	88
Goodwill	269
Deferred tax liabilities	25
Operating lease right-of-use assets	8
Operating lease liabilities	8
Property, plant and equipment, net	3
Haystack Oncology, Inc. | Additional, Based on Revenue
Business Acquisition [Line Items]
Contingent consideration arrangements	100
Haystack Oncology, Inc. | Additional, Reimbursement Coverage
Business Acquisition [Line Items]
Contingent consideration arrangements	50
Haystack Oncology, Inc. | Technology
Business Acquisition [Line Items]
Intangible assets	$ 145
Intangible assets, useful life	15 years