Executive Officers' Separation and Hiring Costs - (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Seperation and Hiring Costs [Line Items]
Separation and hiring costs recorded			$ 5.5
Seperation costs payable to the company's former executives		4.3
General and administrative expense
Seperation and Hiring Costs [Line Items]
Separation and hiring costs recorded	$ 0.8	$ 2.9	$ 6.3