Other (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Mar. 25, 2012	Jun. 30, 2013
Other Income and Expenses [Abstract]
Severance costs	$ 2.7		$ 7.7
Severance liability	13.2		13.2
Accelerated depreciation		$ 6.7