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Other Impairments, Restructuring and Other Items - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Position
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Position
Jun. 30, 2017
USD ($)
Restructuring Cost and Reserve [Line Items]        
Restructuring plan period     2 years  
Recall and inventory reserves cost $ 41      
Impairments of long-lived intangible assets 520 $ 52 $ 727 $ 54
Impairments of property, plant and equipment 28   253  
Restructuring cost 107 98 354 228
Impairments $ 548 $ 145 $ 980 $ 156
Number of positions eliminated | Position 8,300   8,300  
India [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairments     $ 64  
Restructuring Cost [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairments of property, plant and equipment $ 8   155  
Facility Exit Costs And Other Related Restructuring [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring cost     155  
Facility Exit Costs And Other Related Restructuring [Member] | Israel [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring cost     113  
Headquarters and Distribution Sites Consolidation [Member] | United States [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring cost     42  
In Process Research and Development [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairments of long-lived intangible assets 444   561  
Identifiable product rights [Member] | United States [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairments of long-lived intangible assets $ 67   $ 143