Property, Plant and Equipment, net (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Property Plant and Equipment
Total property, plant and equipment, gross	$ 4,181		$ 4,150
Less: accumulated depreciation	(1,519)		(1,473)
Property, plant and equipment, net, excluding tooling	2,662		2,677
Tooling, net of amortization	229		227
Property, plant and equipment, net	2,891		2,904
Capital Expenditures Incurred but Not yet Paid	61		104
Capitalized interest costs	9	$ 11
Land, land use rights and buildings [Member]
Property Plant and Equipment
Total property, plant and equipment, gross	870		871
Machinery and equipment [Member]
Property Plant and Equipment
Total property, plant and equipment, gross	2,959		2,851
Capital leases [Member]
Property Plant and Equipment
Total property, plant and equipment, gross	2		2
Construction in progress [Member]
Property Plant and Equipment
Total property, plant and equipment, gross	$ 350		$ 426