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Restructuring (Details)
$ in Millions
 3 Months Ended
Apr. 02, 2017
USD ($)
Employee
Apr. 03, 2016
USD ($)
Restructuring Cost and Reserve [Line Items]    
Restructuring charges $ 85 $ 120
Medical Devices [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 161  
Restructuring charges recorded to date $ 1,400  
Period of workforce reduction 18 months  
Number of positions eliminated | Employee 1,600  
Medical Devices [Member] | Cost of Sales [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges $ 4  
Medical Devices [Member] | Other Income Expense Net [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 72  
Medical Devices [Member] | Asset Write-off [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 37  
Medical Devices [Member] | Other Restructuring [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 124  
Medical Devices [Member] | Employee Severance [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring estimated cost 500  
Restructuring charges 0  
Medical Devices [Member] | Minimum [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring estimated cost $ 2,000  
Positions eliminated (as a percent) 4.00%  
Medical Devices [Member] | Maximum [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring estimated cost $ 2,400  
Positions eliminated (as a percent) 6.00%