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Supplemental Financial Information - Property, Plant and Equipment, Net (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Property, plant and equipment, at cost $ 10,683 $ 10,660
Accumulated depreciation (6,301) (6,148)
Property, plant and equipment, net $ 4,382 $ 4,512