Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Schedule Of Changes In Goodwill By Operating Segment (Details)

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Goodwill and Intangible Assets - Schedule Of Changes In Goodwill By Operating Segment (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Roll Forward]      
Balance beginning of period   $ 7,015 $ 4,749
Acquisitions and purchase accounting adjustments   108 2,266
Impairment $ (259) (259)  
Translation impact   (1)  
Balance end of period   6,863 7,015
Managed Care      
Goodwill [Roll Forward]      
Balance beginning of period   5,686 4,015
Acquisitions and purchase accounting adjustments   61 1,671
Impairment   (16)  
Translation impact   (1)  
Balance end of period   5,730 5,686
Specialty Services      
Goodwill [Roll Forward]      
Balance beginning of period   1,329 734
Acquisitions and purchase accounting adjustments   47 595
Impairment   (243)  
Translation impact   0  
Balance end of period   $ 1,133 $ 1,329