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Property, plant and equipment (Schedule) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Land $ 279 $ 259  
Buildings and improvements 4,028 3,857  
Manufacturing equipment 3,080 2,865  
Laboratory equipment 1,193 1,257  
Fixed equipment 2,402 2,406  
Capitalized software 1,151 1,216  
Other 862 1,091  
Construction in progress 987 915  
Property, plant and equipment, gross 13,982 13,866  
Less accumulated depreciation and amortization (8,798) (8,977)  
Property, plant and equipment, net 5,184 4,889  
Depreciation and amortization charges associated with property, plant and equipment $ 644 $ 640 $ 635
Buildings and improvements [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 10 years    
Buildings and improvements [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 40 years    
Manufacturing equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 8 years    
Manufacturing equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 12 years    
Laboratory equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 8 years    
Laboratory equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 12 years    
Fixed equipment [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 12 years    
Capitalized software [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 3 years    
Capitalized software [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 5 years    
Other [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 5 years    
Other [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 10 years