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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Cost of Revenue, Policy [Abstract] |  |  |  |  |
Corporate office costs | $ 57 | $ 52 | $ 120 | $ 112 |
Third Party Reimbursement [Abstract] |  |  |  |  |
Amounts due to third party payors | 107 |  | 107 |  | $ 118
Amounts due from third party payors | 100 |  | 100 |  | $ 114
Net Operating Revenues, Policy [Abstract] |  |  |  |  |
Charity care services charges excluded from net operating revenues | 409 | 215 | 772 | 444 |
Value of charity care services at the Company's standard charges included in contractual allowances | 47 | 26 | 88 | 52 |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Gain (loss) on disposition of business |  |  |  | (23) |
Impairment charge of long-lived assets sold |  |  | 6 |  |
CARES Act | Public Health And Social Services Emergency Fund | Paycheck Protection Program and Health Care Enhancement Act |  |  |  |  |
CARES Act and PPPHCE Act Funds [Abstract] |  |  |  |  |
Payments through the PHSSEF and various state and local programs |  |  | 52 | 7 |
CARES Act | Public Health And Social Services Emergency Fund | Accrued Liabilities - Other | Paycheck Protection Program and Health Care Enhancement Act |  |  |  |  |
CARES Act and PPPHCE Act Funds [Abstract] |  |  |  |  |
Payments through the PHSSEF and various state and local programs |  |  | 11 |  |
CARES Act | Operating Costs and Expenses | Public Health And Social Services Emergency Fund | Paycheck Protection Program and Health Care Enhancement Act |  |  |  |  |
CARES Act and PPPHCE Act Funds [Abstract] |  |  |  |  |
Payments through the PHSSEF and various state and local programs | $ 8 | $ 1 | $ 55 | 83 |
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 |  |  |  | 28 |
Hospitals Sold or Deemed Held for Sale | Certain Hospitals |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Gain (loss) on disposition of business |  |  |  | (3) |
Hospitals Closed |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Gain (loss) on disposition of business |  |  |  | (8) |
Shared Service Center |  |  |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |  |  |
Gain (loss) on disposition of business |  |  |  | $ (7) |

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