Related Party Transactions Investee Summarized Financial Information (Details) (Predecessor [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2013
Predecessor [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Summarized Financial Information, Revenue	$ 317
Equity Method Investment, Summarized Financial Information, Operating Expenses	(601)
Equity Method Investment, Summarized Financial Information, Operating Income (Loss)	(284)
Equity Method Investment, Summarized Financial Information, Income (Loss) from continuing operations before non-controlling interests	$ (416)