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Property, Plant and Equipment, Net (Schedule of Assets Under Capital Leases) (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Capital Leased Assets [Line Items]    
Accumulated depreciation $ (179) $ (149)
Net book value 131 155
Buildings [Member]    
Capital Leased Assets [Line Items]    
Gross capital leased asset value 14 13
Machinery and Equipment [Member]    
Capital Leased Assets [Line Items]    
Gross capital leased asset value $ 296 $ 291