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Segment and Geographic Data (Segment Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Assets $ 34,330 $ 30,167 $ 27,229
Capital Expenditures During Period 487 649 572
Operating Segments      
Segment Reporting Information [Line Items]      
Assets 33,340 28,797 26,550
Capital Expenditures During Period 342 419 382
Operating Segments | Orthopaedics      
Segment Reporting Information [Line Items]      
Assets 14,910 9,085 8,873
Capital Expenditures During Period 140 125 134
Operating Segments | MedSurg      
Segment Reporting Information [Line Items]      
Assets 17,901 12,066 10,417
Capital Expenditures During Period 174 265 217
Operating Segments | Neuro and Spine      
Segment Reporting Information [Line Items]      
Assets 529 7,646 7,260
Capital Expenditures During Period 28 29 31
Corporate      
Segment Reporting Information [Line Items]      
Assets 990 1,370 679
Capital Expenditures During Period $ 145 $ 230 $ 190