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Goodwill - Schedule of Goodwill (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Goodwill Roll Forward    
Goodwill $ 6,865 $ 6,980
Accumulated impairment losses (2,814) (2,814)
Goodwill 4,051 $ 4,166
Goodwill acquired as part of acquisitions during current year 6  
Goodwill allocated to hospitals divested or held-for-sale $ (121)