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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) Hospital | Dec. 31, 2023 USD ($) | Dec. 31, 2022
Cost of Revenue, Policy [Abstract] |  |  |  |  |  |
Corporate Office Costs | $ 75 | $ 65 | $ 156 | $ 126 |  |
Third Party Reimbursement [Abstract] |  |  |  |  |  |
Amounts due to third party payors | 92 |  | 92 |  | $ 97 |
Amounts due from third party payors | 109 |  | 109 |  | $ 130 |
Net Operating Revenues, Policy [Abstract] |  |  |  |  |  |
Charity care services charges excluded from net operating revenues | 287 | 320 | 603 | 646 |  |
Value of charity care services at the Company's standard charges included in contractual allowances | $ 29 | $ 34 | 59 | $ 72 |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |  |
Number of hospitals sold | Hospital |  |  |  | 2 |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] |  |  |  |  |  | true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] |  |  |  |  |  | true
Hospitals Sold or Deemed Held for Sale |  |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |  |
Gain (loss) on disposition of business |  |  |  | $ 35 |  |
Gain Loss On Sales Of Assets And Asset Impairment Charges Gross |  |  |  | 62 |  |
Impairment of amount related to several assets idled disposed or held for sale |  |  | $ 27 |  |  |
Amount related to several assets idled disposed or held for sale |  |  |  | 5 |  |
Adjustment for Carrying Value of Other Long-Lived Assets at Underperforming Hospitals |  |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |  |
Amount related to several assets idled disposed or held for sale |  |  |  | 22 |  |
Shared Service Center |  |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |  |
Gain (loss) on disposition of business |  |  |  | $ 130 |  |

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