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Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment $ 16,295 $ 15,506
Accumulated depreciation (11,372) (10,237)
Net property, plant and equipment 4,923 5,269
Land and industrial buildings    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 3,428 3,279
Plant, machinery and equipment    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 9,268 8,621
Assets sold with buy-back commitment    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 2,640 2,649
Construction in progress    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 149 164
Other    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment $ 810 $ 793