Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 26, 2011
Amortization of Financing Costs
Prior period reclassification disclosures
Revised presentation of prior period cash flows	$ 2.6
Gains and Losses on Extinguishment of Debt
Prior period reclassification disclosures
Revised presentation of prior period cash flows	(2.6)
Reclasification of transaction costs from gain on sale of subsidiary
Prior period reclassification disclosures
Revised presentation of prior period cash flows	(2.6)
Reclasification of transaction costs from proceeds from sale of subsidiary
Prior period reclassification disclosures
Revised presentation of prior period cash flows	$ 2.6