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Goodwill and Other Intangible Assets (Changes in Net Carrying Amount of Goodwill by Segment) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Goodwill [Roll Forward]    
Goodwill, Beginning balance $ 9,069 $ 8,563
Additions and adjustments 3,559 547
Foreign exchange 150 (41)
Goodwill, Ending balance 12,778 9,069
Orthopaedics    
Goodwill [Roll Forward]    
Goodwill, Beginning balance 2,386 2,399
Additions and adjustments 3,551 0
Foreign exchange 67 (13)
Goodwill, Ending balance 6,004 2,386
MedSurg    
Goodwill [Roll Forward]    
Goodwill, Beginning balance 3,799 3,581
Additions and adjustments 1 229
Foreign exchange 31 (11)
Goodwill, Ending balance 3,831 3,799
Neuro and Spine    
Goodwill [Roll Forward]    
Goodwill, Beginning balance 2,884 2,583
Additions and adjustments 7 318
Foreign exchange 52 (17)
Goodwill, Ending balance $ 2,943 $ 2,884