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Segments of Business and Geographic Areas - Operating Profit by Segment of Business (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 02, 2017
Jul. 03, 2016
Jul. 02, 2017
Jul. 03, 2016
Segment Reporting Information [Line Items]        
Percentage Change in Operating Income Loss (3.20%)   1.20%  
Royalty Revenue, Monetization of Royalty $ 200      
Restructuring charges 11 $ 114 $ 96 $ 234
Asset write-downs     270 187
Pharmaceutical        
Segment Reporting Information [Line Items]        
Valuation Allowances and Reserves, Additions for Adjustments   300 500  
Royalty Revenue, Monetization of Royalty     200  
Gain on sale of equity investments     200 100
Litigation Expense      
Medical Devices        
Segment Reporting Information [Line Items]        
Restructuring charges 100 100 300 300
Litigation Expense 400 600 400 700
Asset write-downs 200 200
Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Total Segment Operating Income $ 5,064 5,197 $ 10,886 10,683
Percentage Change in Operating Income Loss (2.60%)   1.90%  
Operating Segments [Member] | Consumer        
Segment Reporting Information [Line Items]        
Total Segment Operating Income $ 658 571 $ 1,254 1,137
Percentage Change in Operating Income Loss 15.20%   10.30%  
Operating Segments [Member] | Pharmaceutical        
Segment Reporting Information [Line Items]        
Total Segment Operating Income $ 3,414 3,687 $ 7,077 7,031
Percentage Change in Operating Income Loss (7.40%)   0.70%  
Operating Segments [Member] | Medical Devices        
Segment Reporting Information [Line Items]        
Total Segment Operating Income $ 992 939 $ 2,555 2,515
Percentage Change in Operating Income Loss 5.60%   1.60%  
Corporate, Non-Segment [Member]        
Segment Reporting Information [Line Items]        
Total Segment Operating Income $ 316 $ 293 $ 563 $ 485
Actelion [Member]        
Segment Reporting Information [Line Items]        
Business Combination, Acquisition Related Costs 200      
Actelion [Member] | Pharmaceutical        
Segment Reporting Information [Line Items]        
Business Combination, Acquisition Related Costs $ 200   $ 200