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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) Hospital | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Cost of Revenue, Policy [Abstract] |  |  |  |  |
Corporate office costs | $ 61 | $ 60 | $ 187 | $ 179 |
Third Party Reimbursement [Abstract] |  |  |  |  |
Amounts due to third party payors | 119 |  | 119 |  | $ 101
Amounts due from third party payors | 121 |  | 121 |  | $ 97
Net Operating Revenues, Policy [Abstract] |  |  |  |  |
Charity care services charges excluded from net operating revenues | 355 | 285 | 1,000 | 1,100 |
Value of charity care services at the Company's standard charges included in contractual allowances | $ 39 | 33 | $ 111 | 121 |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Number of hospitals sold | Hospital |  |  | 3 |  |
Impairment of long-lived assets held for sale |  |  |  | 54 |
Hospitals Sold or Deemed Held for Sale |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Net gain (loss) on disposition of business |  |  | $ 9 |  |
Gain (loss) on disposition of business |  |  | 63 |  |
Impairment of amount related to several assets idled disposed or held for sale |  |  | 8 |  |
Impairment of long-lived assets held for sale |  |  | 25 |  |
Adjustment for Carrying Value of Other Long-Lived Assets at Underperforming Hospitals |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Impairment of long-lived assets held for sale |  |  | 21 | $ 6 |
Hospital Closures of Shorepoint Health Venice in Venice, Florida and Near-complete Closure of First Hospital Wyoming Valley (Psychiatric Hospital) in Wilkes-Barre, Pennsylvania |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Impairment of long-lived assets held for sale |  | $ 48 |  |  |
Shared Service Center |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Net gain (loss) on disposition of business |  |  | $ 84 |  |

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