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Acquisitions and Dispositions - Additional Information (Detail) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2024 USD ($) Hospital | Jun. 30, 2023 USD ($) Hospital
Business Acquisition [Line Items] |  |
Proceeds from sale of business | $ 311 | $ 172
Pretax gain (loss) before tax | 213 | 14
Real Estate and Other Investments [Member] |  |
Business Acquisition [Line Items] |  |
Proceeds from sale of business | 14 | 9
Nonhospital Health Care [Member] |  |
Business Acquisition [Line Items] |  |
Aggregate purchase price | 81 | 41
Hospital Facility [Member] |  |
Business Acquisition [Line Items] |  |
Aggregate purchase price | $ 50 | $ 83
Number of hospitals purchased | Hospital | 2 | 1
Proceeds from sale of business | $ 297 | $ 163
Number of hospitals sold | Hospital | 1 | 2

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