Income Taxes (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components of Profit before income taxes
U.S.									$ 285	$ 249	$ 230
Non-U.S.									305	312	389
Profit before income taxes	$ 133	$ 126	$ 164	$ 167	$ 122	$ 146	$ 148	$ 145	590	561	619
Current income tax provision (benefit)
U.S.									157	(18)	(21)
Non-U.S.									102	111	109
State (U.S.)									1	0	2
Current income tax provision (benefit)									260	93	90
Deferred income tax provision (benefit)
U.S.									(239)	90	45
Non-U.S.									(28)	(15)	21
State (U.S.)									3	3	2
Deferred income tax provision (benefit)									(264)	78	68
Total Provision (benefit) for income taxes									$ (4)	$ 171	$ 158