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Fixed Assets - Components of Fixed Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross $ 18,000 $ 16,830
Property plant and equipment, net 8,260 8,095
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross 219 229
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross 2,413 2,205
Accumulated depreciation (945) (810)
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property plant and equipment, gross 15,368 14,396
Accumulated depreciation $ (8,795) $ (7,925)