Organization and Basis of Presentation Principles of Consolidation (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Net cash from operating activities	$ 519	$ 414	[1]
Net cash used in investing activities	$ (777)	(234)	[1]
Predecessor [Member]
Net cash from operating activities		(15)
Net cash used in investing activities		$ (98)

[1] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.