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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Value of input used to measure contingent consideration liability from business combination.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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- Definition

Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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BUSINESS ACQUISITIONS - Additional Information (Details) $ in Millions, $ in Millions							3 Months Ended			9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 16, 2024 USD ($)	Aug. 23, 2024 USD ($)	Aug. 23, 2024 CAD ($)	Jun. 10, 2024 USD ($)	Feb. 12, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Business Acquisition [Line Items]
Consideration										$ 1,800
Payment for contingent consideration										6
Prepayments to acquire businesses								$ 30		30
Goodwill acquired during the period										872
Goodwill, expected tax deductible amount	$ 590						$ 590			590
Cash paid for business acquisitions							1,583		$ 2	1,831	$ 612
Net revenues							$ 2,488		$ 2,295	7,251	$ 6,964
Lenco Diagnostics Laboratories, Inc.
Business Acquisition [Line Items]
Cash paid for business acquisitions						$ 111
PathAI Diagnostics
Business Acquisition [Line Items]
Cash paid for business acquisitions					$ 100
LifeLabs Inc.
Business Acquisition [Line Items]
Cash paid for business acquisitions			$ 1,000	$ 1,350
Net revenues										$ 74
LifeLabs Inc. \| Discount rate \| Valuation, Royalty Method \| Trade name
Business Acquisition [Line Items]
Measurement input	0.120						0.120			0.120
LifeLabs Inc. \| Discount rate \| Minimum \| Valuation, Income Approach \| Customer related
Business Acquisition [Line Items]
Measurement input	0.130						0.130			0.130
LifeLabs Inc. \| Discount rate \| Maximum \| Valuation, Income Approach \| Customer related
Business Acquisition [Line Items]
Measurement input	0.140						0.140			0.140
Allina Health
Business Acquisition [Line Items]
Cash paid for business acquisitions		$ 230
Laboratory Business of Three Physician Groups in New York
Business Acquisition [Line Items]
Cash paid for business acquisitions	$ 300