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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Depreciation and fixed asset basis differences, Assets | $ 0 | $ 0
Allowances for professional liability and other risks, Assets | 452 | 430
Accounts receivable, Assets | 363 | 368
Compensation, Assets | 308 | 402
Right-of-use lease obligations | 506 | 451
Other, Assets | 592 | 536
Deferred tax assets | 2,221 | 2,187
Depreciation and fixed asset basis differences, Liabilities | 1,048 | 938
Allowances for professional liability and other risks, Liabilities | 0 | 0
Accounts receivable, Liabilities | 0 | 0
Compensation, Liabilities | 0 | 0
Right-of-use lease assets and obligations | 492 | 438
Other, Liabilities | 860 | 698
Deferred tax liabilities | $ 2,400 | $ 2,074

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