Basis of Presentation and Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	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%