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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) Hospital Item | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Business Description [Abstract] |  |  |
Number of affiliated hospitals owned and leased by subsidiaries | Hospital | 71 |  |
Number of beds | Item | 12,000 |  |
Number of sites of care operates | Item | 1,000 |  |
Cost of Revenue, Policy [Abstract] |  |  |
Corporate Office Costs | $ 248,000,000 | $ 229,000,000 | $ 222,000,000
Stock-based compensation expense | 22,000,000 | 20,000,000 | 25,000,000
Marketable Securities, Policy [Abstract] |  |  |
Net change in fair value of available-for-sale debt securities, net of tax | 6,000,000 | (17,000,000) | (5,000,000)
Property and Equipment, Policy [Abstract] |  |  |
Construction in Progress, Gross | 343,000,000 | 234,000,000 |
Interest Costs Capitalized | 13,000,000 | 9,000,000 | 13,000,000
Purchases of property and equipment and internal-use software accrued in accounts payable | 101,000,000 | 87,000,000 |
Goodwill, Policy [Abstract] |  |  |
Impairment of goodwill | 0 | 0 | 0
Third Party Reimbursement [Abstract] |  |  |
Amounts due to third party payors | 97,000,000 | 101,000,000 |
Amounts due from third party payors | 130,000,000 | 97,000,000 |
Net Operating Revenues, Policy [Abstract] |  |  |
Charity care services charges excluded from net operating revenues | 1,300,000,000 | 1,400,000,000 | 1,100,000,000
Value of charity care services at the Company's standard charges included in contractual allowances | 140,000,000 | 166,000,000 | 123,000,000
Concentration of Credit Risk, Policy [Abstract] |  |  |
Accounts receivable, net of contractual allowances | 2,231,000,000 | 2,040,000,000 |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |
Impairment of long-lived assets sold |  | 71,000,000 |
Amount related to closure of hospitals |  | 44,000,000 |
Amount related to expiration or planned non-renewal of leases |  | 9,000,000 |
Amount related to several assets idled disposed or held for sale |  | 11,000,000 |
C A R E S Act And P P P H C E Act Funds [Abstract] |  |  |
Pandemic Relief Funds |  | $ 173,000,000 | 148,000,000
New Accounting Pronouncements, Policy [Abstract] |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] |  | true |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] |  | true |
Public Health and Social Services Emergency Fund (the "PHSSEF") | CARES Act | Paycheck Protection Program, Health Care Enhancement Act And the American Rescue Plan Act of 2021 |  |  |
C A R E S Act And P P P H C E Act Funds [Abstract] |  |  |
Accelerated Payments Received Returned Under Cares Act |  | $ 161,000,000 | 58,000,000
Public Health and Social Services Emergency Fund (the "PHSSEF") | CARES Act | Paycheck Protection Program And Health Care Enhancement Act | Operating Costs and Expenses |  |  |
C A R E S Act And P P P H C E Act Funds [Abstract] |  |  |
Accelerated Payments Received Returned Under Cares Act |  | 173,000,000 | $ 148,000,000
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 |  | 7,000,000 |
Hospitals Sold Or Deemed Held For Sale |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |
Gain (loss) on disposition of business | (87,000,000) |  |
Gain Loss On Sales Of Assets And Asset Impairment Charges Gross | 145,000,000 |  |
Impairment of amount related to several assets idled disposed or held for sale | 9,000,000 |  |
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 | 49,000,000 |  |
Shared Service Center |  |  |
Accounting for the Impairment or Disposal of Long-Lived Assets |  |  |
Gain (loss) on disposition of business | 186,000,000 |  |
Medicare |  |  |
Concentration of Credit Risk, Policy [Abstract] |  |  |
Accounts receivable, net of contractual allowances | $ 194,000,000 | $ 198,000,000 |
Accounts receivable net of contractual allowances, percent | 6.00% | 6.00% |
Physician Recruitment Contracts |  |  |
Other Assets, Policy [Abstract] |  |  |
Term of Physician Recruitment Contract | 3 years |  |
Physician Income Guarantees, Policy [Abstract] |  |  |
Physicians recruitment agreement period | 1 year |  |
Term of Physician Recruitment Contract | 3 years |  |
Unamortized portion of physician income guarantees | $ 9,000,000 | $ 12,000,000 |
Capitalized Internal Use Software, Significant System Conversions |  |  |
Other Assets, Policy [Abstract] |  |  |
Finite-Lived Intangible Assets, Weighted-Average Useful Life | 3 years |  |
Capitalized Internal Use Software Except Significant System Conversions |  |  |
Other Assets, Policy [Abstract] |  |  |
Finite-Lived Intangible Assets, Weighted-Average Useful Life | 3 years |  |
Land Improvements | Minimum |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Land Improvements | Maximum |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 20 years |  |
Building and Building Improvements | Minimum |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Building and Building Improvements | Maximum |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |
Equipment and Fixtures | Minimum |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Equipment and Fixtures | Maximum |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 18 years |  |
Certain Facility |  |  |
Property and Equipment, Policy [Abstract] |  |  |
Non-cash investing activity through capital leases | $ 1,000,000 |  |
Geographic Concentration Risk | Indiana | Sales Revenue, Net |  |  |
Business Description [Abstract] |  |  |
Concentration Risk, Percentage | 17.10% | 17.30% | 16.40%
Geographic Concentration Risk | Florida | Sales Revenue, Net |  |  |
Business Description [Abstract] |  |  |
Concentration Risk, Percentage | 11.10% | 11.60% | 12.20%
Geographic Concentration Risk | Texas | Sales Revenue, Net |  |  |
Business Description [Abstract] |  |  |
Concentration Risk, Percentage | 11.70% | 11.70% | 11.00%
Geographic Concentration Risk | Alabama | Sales Revenue, Net |  |  |
Business Description [Abstract] |  |  |
Concentration Risk, Percentage | 14.40% | 13.30% | 13.00%

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