Related Party Transactions (Details) (Successor [Member], USD $)	11 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Cash distributions	$ 1,250,000,000	$ 3,750,000,000	$ 3,500,000,000
Parent Company
Related Party Transaction [Line Items]
Cash distributions		3,750,000,000	3,500,000,000
Tax refund from parent company		0	426,000,000
Tax payments to parent company		$ 1,033,000,000	$ 396,000,000