v3.10.0.1
Segment, Geographic and Other Revenue Information - Narrative (Detail)
$ in Millions
12 Months Ended 33 Months Ended
Dec. 31, 2018
USD ($)
Operating_Segment
Country
Dec. 31, 2017
USD ($)
Country
Dec. 31, 2016
USD ($)
Dec. 31, 2018
USD ($)
Operating_Segment
Country
Segment Reporting Information [Line Items]        
Number of operating segments | Operating_Segment 2     2
Total assets [1] $ 159,422 $ 171,797   $ 159,422
Geographic Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Outside United States [Member]        
Segment Reporting Information [Line Items]        
Number of countries outside the U.S | Country 11 11   11
Geographic Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | United States [Member]        
Segment Reporting Information [Line Items]        
Percentage of total revenues 10.00% 10.00% 10.00%  
Geographic Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | JAPAN        
Segment Reporting Information [Line Items]        
Percentage of total revenues 8.00% 8.00% 8.00%  
Geographic Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | CHINA        
Segment Reporting Information [Line Items]        
Percentage of total revenues 8.00% 7.00% 6.00%  
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Domestic Wholesaler One [Member]        
Segment Reporting Information [Line Items]        
Percentage of total revenues 15.00% 16.00% 16.00%  
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Domestic Wholesaler Two [Member]        
Segment Reporting Information [Line Items]        
Percentage of total revenues 11.00% 12.00% 12.00%  
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Domestic Wholesaler Three [Member]        
Segment Reporting Information [Line Items]        
Percentage of total revenues 10.00% 10.00% 10.00%  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Three Largest U.S. Wholesaler Customers [Member]        
Segment Reporting Information [Line Items]        
Percentage of total revenues 34.00% 36.00% 29.00%  
Corporate [Member] | Scenario, Adjustment [Member]        
Segment Reporting Information [Line Items]        
Costs reclassified   $ (70) $ (43)  
Innovative Health Segment [Member] | Operating Segments [Member] | Scenario, Adjustment [Member]        
Segment Reporting Information [Line Items]        
Costs reclassified   (468) (312)  
Essential Health Segment [Member] | Operating Segments [Member] | Scenario, Adjustment [Member]        
Segment Reporting Information [Line Items]        
Costs reclassified   $ (176) $ (167)  
[1] Amounts may not add due to rounding.