Other Liabilities (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2015
Other Liabilities [Abstract]
Product warranty and recall accruals	$ 33			$ 33
Dividends Payable, Current	29			3
Income taxes payable	19			12
Rent and royalties	16			24
Restructuring Reserve	13			24
Deferred income	7			18
Joint venture payables	13			12
Non-income taxes payable	9			10
Foreign currency hedges	0			1
Distribution Payable	0			14
Other	23			29
Other Liabilities, Current	162			180
Dividends Payable					$ 1,750
Payments of Capital Distribution	$ 14	$ 1	$ 1,740
Dividends Payable, Date to be Paid	Jan. 22, 2016
Hedging Liabilities, Noncurrent	$ 22			23
Product warranty and recall accruals	15			16
Deferred income	14			16
Income tax reserves	11			12
Non-income tax reserves	6			7
Other	19			21
Other Liabilities, Noncurrent	$ 87			$ 95