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Basis of Presentation and Significant Accounting Policies - Additional Information (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Hospital
Dec. 31, 2023
USD ($)
Dec. 31, 2022
Cost of Revenue, Policy [Abstract]            
Corporate Office Costs $ 75 $ 65 $ 156 $ 126    
Third Party Reimbursement [Abstract]            
Amounts due to third party payors 92   92   $ 97  
Amounts due from third party payors 109   109   $ 130  
Net Operating Revenues, Policy [Abstract]            
Charity care services charges excluded from net operating revenues 287 320 603 646    
Value of charity care services at the Company's standard charges included in contractual allowances $ 29 $ 34 59 $ 72    
Accounting for the Impairment or Disposal of Long-Lived Assets            
Number of hospitals sold | Hospital       2    
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]           true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]           true
Hospitals Sold or Deemed Held for Sale            
Accounting for the Impairment or Disposal of Long-Lived Assets            
Gain (loss) on disposition of business       $ 35    
Gain Loss On Sales Of Assets And Asset Impairment Charges Gross       62    
Impairment of amount related to several assets idled disposed or held for sale     $ 27      
Amount related to several assets idled disposed or held for sale       5    
Adjustment for Carrying Value of Other Long-Lived Assets at Underperforming Hospitals            
Accounting for the Impairment or Disposal of Long-Lived Assets            
Amount related to several assets idled disposed or held for sale       22    
Shared Service Center            
Accounting for the Impairment or Disposal of Long-Lived Assets            
Gain (loss) on disposition of business       $ 130