Executive Officers' Separation and Hiring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 28, 2014	Jun. 28, 2014	Jun. 29, 2013
Separation and Hiring Costs [Line Items]
Executive ocers' separation and hiring, severance liabilities	$ 1.4	$ 1.4
Executive officers' separation and hiring payment completion		2016
General and Administrative Expense [Member]
Separation and Hiring Costs [Line Items]
Executive officers' separation and hiring, period costs	$ 0.8	$ 2.8	$ 1.1