Executive Officers' Separation and Hiring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Separation and Hiring Costs [Line Items]
Executive ocers' separation and hiring, severance liabilities	$ 1.1		$ 1.1
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	$ 0.3	$ 0.1	$ 3.1	$ 1.2