Organization and Basis of Presentation Principles of Consolidation (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Net cash from operating activities	$ 324	$ 242	[1]
Net cash used in investing activities	$ (731)	(178)	[1]
Predecessor [Member]
Net cash from operating activities		10
Net cash used in investing activities		$ 81

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