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Inventories, Net (Schedule of Inventory) (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials, components and supplies $ 146 $ 144
Work in process 57 47
Finished goods 894 1,043
Inventories, Net $ 1,097 $ 1,234