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Leases - Property, Plant and Equipment Related to Operating Leases (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Accumulated depreciation $ (2,135) $ (1,880)
Net property, plant and equipment 6,165 6,063
Assets Leased to Others    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 6,975 6,942
Accumulated depreciation (1,854) (1,649)
Net property, plant and equipment $ 5,121 $ 5,293