BUSINESS ACQUISITIONS (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Feb. 12, 2024	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Consideration		$ 148
Contingent consideration		6
Prepayments to acquire businesses		30		$ 30
Goodwill acquired during the period		99
Cash paid for business acquisitions		142	$ 31
Goodwill		7,830		$ 7,733
Goodwill, expected tax deductible amount		99
Customer Relationships
Business Acquisition [Line Items]
Intangible assets		$ 56
Lenco Diagnostics Laboratories, Inc.
Business Acquisition [Line Items]
Cash paid for business acquisitions	$ 111
Goodwill	75
Goodwill, expected tax deductible amount	75
Operating lease liabilities	7
Lenco Diagnostics Laboratories, Inc. | Customer Relationships
Business Acquisition [Line Items]
Intangible assets	$ 43
Intangible assets, useful life	15 years