Property, Plant and Equipment, Net (Schedule of Assets Under Capital Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Capital Leased Assets [Line Items]
Accumulated depreciation	$ (188)	$ (179)
Net book value	105	131
Buildings [Member]
Capital Leased Assets [Line Items]
Gross capital leased asset value	14	14
Machinery and Equipment [Member]
Capital Leased Assets [Line Items]
Gross capital leased asset value	$ 279	$ 296