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Basis of Presentation and Significant Accounting Policies - Additional Information (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Hospital
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Cost of Revenue, Policy [Abstract]          
Corporate office costs $ 65 $ 57 $ 126 $ 120  
Third Party Reimbursement [Abstract]          
Amounts due to third party payors 111   111   $ 101
Amounts due from third party payors 124   124   $ 97
Net Operating Revenues, Policy [Abstract]          
Charity care services charges excluded from net operating revenues 320 409 646 772  
Value of charity care services at the Company's standard charges included in contractual allowances $ 34 $ 47 $ 72 88  
Accounting for the Impairment or Disposal of Long-Lived Assets          
Number of hospitals sold | Hospital     2    
Hospitals Sold or Deemed Held for Sale          
Accounting for the Impairment or Disposal of Long-Lived Assets          
Net gain (loss) on disposition of business     $ 35    
Gain (loss) on disposition of business     62    
Impairment of amount related to several assets idled disposed or held for sale     5    
Impairment of long-lived assets held for sale     22    
Adjustment for Carrying Value of Other Long-Lived Assets at Underperforming Hospitals          
Accounting for the Impairment or Disposal of Long-Lived Assets          
Net gain (loss) on disposition of business       $ 6  
Shared Service Center          
Accounting for the Impairment or Disposal of Long-Lived Assets          
Net gain (loss) on disposition of business     $ 130