Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified	5 Months Ended	7 Months Ended	12 Months Ended
	May 25, 2010	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2009	Dec. 31, 2012
Operating Leased Assets
Future annual rent expense					$ 8
Operating Leases, Rent Expense	$ 3	$ 3	$ 3	$ 2