Basis of Presentation and Significant Accounting Policies - Additional Information (Details)	1 Months Ended	12 Months Ended
	Apr. 30, 2020 USD ($)	Dec. 31, 2022 USD ($) Hospital Item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Description [Abstract]
Number of affiliated hospitals owned and leased by subsidiaries | Hospital		80
Number of beds | Item		13,000
Number of sites of care operates | Item		1,000
Cost of Revenue, Policy [Abstract]
Corporate Office Costs		$ 229,000,000	$ 222,000,000	$ 190,000,000
Stock-based compensation expense		20,000,000	25,000,000	13,000,000
Marketable Securities, Policy [Abstract]
Net change in fair value of available-for-sale debt securities, net of tax of $5 for the year ended December 31, 2022 and $1 for the years ended December 31, 2021 and 2020		(17,000,000)	(5,000,000)	4,000,000
Property and Equipment, Policy [Abstract]
Construction in Progress, Gross		234,000,000	225,000,000
Interest Costs Capitalized		9,000,000	13,000,000	15,000,000
Purchases of property and equipment and internal-use software accrued in accounts payable		87,000,000	105,000,000
Goodwill, Policy [Abstract]
Impairment of goodwill		0	0	0
Third Party Reimbursement [Abstract]
Amounts due to third party payors		101,000,000	118,000,000
Amounts due from third party payors		97,000,000	114,000,000
Net Operating Revenues, Policy [Abstract]
Charity care services charges excluded from net operating revenues		1,400,000,000	1,100,000,000	1,000,000,000.0
Value of charity care services at the Company's standard charges included in contractual allowances		166,000,000	123,000,000	122,000,000
Concentration of Credit Risk, Policy [Abstract]
Accounts receivable, net of contractual allowances		2,040,000,000	2,062,000,000
Accounting for the Impairment or Disposal of Long-Lived Assets
Gain (loss) on disposition of business			(24,000,000)
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
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
CARES Act
Medicare Accelerated Payments [Abstract]
Medicare accelerated payments received under the Cares Act	$ 1,200,000,000
Medicare accelerated payments, recouped subject to the aforementioned repayment terms			1,100,000,000	77,000,000
CARES Act | Paycheck Protection Program, Health Care Enhancement Act And the American Rescue Plan Act of 2021
COVID-19 Pandemic [Abstract]
Percentage of maximum accelerated payment		100.00%
Medicare accelerated and advance payment program period		6 months
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
COVID-19 Pandemic [Abstract]
CARES Act and PPPHCE Act of 2020 Aid, amount		$ 186,000,000,000
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	705,000,000
Public Health and Social Services Emergency Fund (the "PHSSEF") | CARES Act | Paycheck Protection Program And Health Care Enhancement Act | Accrued Liabilities - Other
C A R E S Act And P P P H C E Act Funds [Abstract]
Payments through the PHSSEF and various state and local programs				2,000,000
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]
Payments through the PHSSEF and various state and local programs		173,000,000	148,000,000	$ 601,000,000
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 | Certain Hospitals
Accounting for the Impairment or Disposal of Long-Lived Assets
Gain (loss) on disposition of business			(3,000,000)
Adjustment for Carrying Value of Other Long-Lived Assets at Underperforming Hospitals
Accounting for the Impairment or Disposal of Long-Lived Assets
Gain (loss) on disposition of business			29,000,000
Hospitals Closed
Accounting for the Impairment or Disposal of Long-Lived Assets
Gain (loss) on disposition of business			8,000,000
Shared Service Center
Accounting for the Impairment or Disposal of Long-Lived Assets
Gain (loss) on disposition of business			5,000,000
Medicare
Concentration of Credit Risk, Policy [Abstract]
Accounts receivable, net of contractual allowances		$ 198,000,000	$ 211,000,000
Accounts receivable net of contractual allowances, percent		6.00%	5.00%
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		$ 12,000,000	$ 13,000,000
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		$ 38,000,000
Geographic Concentration Risk | Indiana | Sales Revenue, Net
Business Description [Abstract]
Concentration Risk, Percentage		17.30%	16.40%	15.00%
Geographic Concentration Risk | Florida | Sales Revenue, Net
Business Description [Abstract]
Concentration Risk, Percentage		11.60%	12.20%	13.00%
Geographic Concentration Risk | Texas | Sales Revenue, Net
Business Description [Abstract]
Concentration Risk, Percentage		11.70%	11.00%	12.20%
Geographic Concentration Risk | Alabama | Sales Revenue, Net
Business Description [Abstract]
Concentration Risk, Percentage		13.30%	13.00%	12.10%