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v3.25.3

Acquisitions and Dispositions - Additional Information (Detail) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2025 USD ($) Hospital | Sep. 30, 2024 USD ($) Hospital
Business Acquisition [Line Items] |  |
Proceeds from sale of business | $ 177 | $ 312
Pretax gain (loss) before tax | (4) | 209
Real Estate and Other Investments [Member] |  |
Business Acquisition [Line Items] |  |
Proceeds from sale of business | 22 | 17
Healthcare Entity [Member] |  |
Business Acquisition [Line Items] |  |
Aggregate purchase price | 171 | 112
Hospital Facility [Member] |  |
Business Acquisition [Line Items] |  |
Aggregate purchase price | $ 190 | $ 112
Number of hospitals purchased | Hospital | 2 | 3
Proceeds from sale of business | $ 155 | $ 295
Number of hospitals sold | Hospital | 1 | 1

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