Assets Non Current assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred income taxes (Note 14)	$ 185	$ 130
Unamortized Revolving Credit Facility debt issuance costs (Note 11)	8	10
Income and other taxes receivable	22	30
Reimbursable engineering costs	66	26
Value added tax receivable	37	33
Cost method investments	56	6
Derivative financial instruments (Note 17)	8	8
Other	88	37
Total	$ 470	$ 280