Summary of Accounting Policies - Redeemable Non Controlling Interest (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Redeemable Noncontrolling Interest [Roll Forward]
Beginning Balance	$ 42	$ 40	$ 41
Federal-Mogul acquisition	96	0	0
Net income attributable to redeemable noncontrolling interests	(29)	(36)	(36)
Other comprehensive (loss) income	(2)	3	(2)
Contributions received	6	0	0
Dividends declared	(33)	(37)	(35)
Ending Balance	$ 138	$ 42	$ 40