v3.20.4
Property, Plant and Equipment - Components of Property, Plant and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment before accumulated depreciation $ 28,711 $ 27,959
Less: Accumulated depreciation 14,812 14,990
Property, plant and equipment 13,900 12,969
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment before accumulated depreciation 444 495
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment before accumulated depreciation 9,022 9,181
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment before accumulated depreciation 11,153 10,648
Furniture, fixtures and other [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment before accumulated depreciation 4,541 4,840
Construction in progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment before accumulated depreciation $ 3,552 $ 2,794
Minimum [Member] | Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Useful lives (years) 33 years  
Minimum [Member] | Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful lives (years) 8 years  
Minimum [Member] | Furniture, fixtures and other [Member]    
Property, Plant and Equipment [Line Items]    
Useful lives (years) 3 years  
Maximum [Member] | Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Useful lives (years) 50 years  
Maximum [Member] | Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful lives (years) 20 years  
Maximum [Member] | Furniture, fixtures and other [Member]    
Property, Plant and Equipment [Line Items]    
Useful lives (years) 12 years 6 months