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Business and Summary of Significant Accounting Policies - Redeemable Noncontrolling Interests and Noncontrolling Interest - Additional Information (Detail) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) Facility | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Aug. 31, 2022
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Behavioral health care facilities with outside owners holding non-controlling minority interest | Facility | 6 |  |  |
Non-controlling interest balances | $ 83 |  |  |
Redeemable non-controlling interest balances | 13 |  |  |
Payments to Acquire Businesses | $ 19 | $ 4 | $ 20 |
Texas | Outside Owners | Acute Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 7.00% |  |  |
Arizona | Outside Owners | Behavioral Health Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 49.00% |  |  |
Pennsylvania | Outside Owners | Behavioral Health Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 20.00% |  |  |
Ohio | Outside Owners | Behavioral Health Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 30.00% |  |  |
Washington | Outside Owners | Behavioral Health Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 20.00% |  |  |
Missouri | Outside Owners | Behavioral Health Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 25.00% |  |  |
Lowa | Outside Owners | Behavioral Health Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 48.00% |  |  |
Michigan |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Behavioral health care facilities with outside owners holding non-controlling minority interest | Facility | 2 |  |  |
Michigan | Outside Owners | Behavioral Health Care Facility One |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 26.00% |  |  |
Michigan | Outside Owners | Behavioral Health Care Facility Two |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 49.00% |  |  |
Michigan | Outside Owners | Surgery center |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 49.00% |  |  |
Nevada | Outside Owners | Acute Care Facility |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of non-controlling, minority ownership interests held by outside owners | 5.00% |  |  |
DC |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Payments to Acquire Businesses | $ 51 |  |  |
DC | Hospital |  |  |  |
Summary Of Business And Significant Accounting Policies [Line Items] |  |  |  |
Non-controlling ownership interests | 100.00% |  |  | 20.00%

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