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Restructuring (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Oct. 01, 2017
USD ($)
Oct. 02, 2016
USD ($)
Oct. 01, 2017
USD ($)
Employee
Oct. 02, 2016
USD ($)
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 69 $ 62 $ 165 $ 296
Medical Devices [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring Charge, Net of Accrual Adjustment     476  
Restructuring charges 187   566  
Restructuring Reserve, Accrual Adjustment     (90)  
Restructuring charges recorded to date 1,800   $ 1,800  
Period of workforce reduction     15 months  
Number of positions eliminated | Employee     2,200  
Number of positions eliminated and receiving severance | Employee     1,700  
Medical Devices [Member] | Cost of Sales [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 29   $ 46  
Medical Devices [Member] | Other Income Expense Net [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 89   265  
Medical Devices [Member] | Asset Write-off [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     140  
Restructuring Reserve, Accrual Adjustment     0  
Medical Devices [Member] | Other Restructuring [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     426  
Restructuring Reserve, Accrual Adjustment     0  
Medical Devices [Member] | Employee Severance [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring estimated cost 400   400  
Restructuring charges     0  
Restructuring Reserve, Accrual Adjustment     (90)  
Medical Devices [Member] | Minimum [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring estimated cost 2,000   $ 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   $ 2,400  
Positions eliminated (as a percent)     6.00%