Acquisitions and Dispositions - Additional Information (Detail) $ in Millions	9 Months Ended
Sep. 30, 2023 USD ($) Hospital	Sep. 30, 2022 USD ($)
Business Acquisition [Line Items]
Proceeds from sale of business	$ 183	$ 652
Pretax gain (loss) before tax	(12)	(25)
Real Estate and Other Investments [Member]
Business Acquisition [Line Items]
Proceeds from sale of business	21	38
Discontinued Operations, Disposed of by Sale [Member]
Business Acquisition [Line Items]
Proceeds from sale of business		614
Nonhospital Health Care [Member]
Business Acquisition [Line Items]
Aggregate purchase price	198	$ 176
Hospital Facility [Member]
Business Acquisition [Line Items]
Aggregate purchase price	83
Proceeds from sale of business	$ 162
Number of hospitals sold \| Hospital	2

Number of hospitals sold.

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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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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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

+ References

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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