PARENTHETICAL DISCLOSURE OF CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2013 Successor	Dec. 31, 2012 Successor	Mar. 25, 2012 Successor	Mar. 25, 2012 Predecessor	Dec. 31, 2011 Predecessor	Dec. 31, 2010 Predecessor
Allowance for doubtful accounts	$ 1	$ 1	$ 1	$ 1	$ 1	$ 1