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Equity Investments - Additional Information (Details)
$ in Millions
12 Months Ended 60 Months Ended
Jul. 30, 2021
USD ($)
Hospital
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2016
Dec. 31, 2021
USD ($)
Schedule Of Equity Method Investments [Line Items]            
Proceeds from sale of unconsolidated minority equity interests   $ 110        
Equity method investment   129 $ 190     $ 129
Equity in earnings of unconsolidated affiliates   $ 22 $ 10 $ 15    
HealthTrust [Member]            
Schedule Of Equity Method Investments [Line Items]            
Equity method investment ownership percentage   17.50%       17.50%
Two Hospitals in Macon Georgia            
Schedule Of Equity Method Investments [Line Items]            
Disposal date   Jul. 30, 2021        
Number of hospitals sold | Hospital 2          
Percentage of ownership interest sold 38.00%          
Proceeds from sale of unconsolidated minority equity interests $ 110          
Pre tax gain on sale of investments   $ 39        
Home Care [Member]            
Schedule Of Equity Method Investments [Line Items]            
Disposal date   Dec. 31, 2016        
Percentage of ownership interest sold         80.00% 20.00%
Equity method investment ownership percentage         80.00%