Acquisitions and Dispositions - Additional Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($) Hospital	Mar. 31, 2022 USD ($)
Business Acquisition [Line Items]
Proceeds from sale of business	$ 165	$ 14
Pretax gain (loss) before tax	(15)	10
Hospital Facility [Member]
Business Acquisition [Line Items]
Aggregate purchase price	$ 83
Number of hospitals sold \| Hospital	2
Proceeds from sale of business	$ 163
Nonhospital Health Care [Member]
Business Acquisition [Line Items]
Aggregate purchase price	32	2
Real Estate and Other Investments [Member]
Business Acquisition [Line Items]
Proceeds from sale of business	$ 2	$ 14

Number of hospitals sold.

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+ References

No definition available.

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

+ References

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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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-Name Accounting Standards Codification
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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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