Derivative Instrument and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 31, 2012 Successor	Mar. 31, 2013 Successor	Mar. 25, 2012 Predecessor
Derivative
Reclassification of unrealized loss from accumulated other comprehensive income – increase of interest expense	$ 0	$ 0	$ 4