Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 24, 2012	Jun. 24, 2012
Income Taxes (Textual) [Abstract]
State tax reserves reversal	15.10%	28.20%
Unrecognized tax benefits, beginning balance		$ 30.5
Decreases in unrecognized tax benefits		8.1
Unrecognized tax benefits, ending balance	$ 15.9	$ 15.9