Stock-Based Compensation (Expense Included in Selling, General and Administrative Expenses Related to Stock Options and Restricted Stock Awards) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3.3	$ 2.5
Selling, General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3.3	$ 2.5
Stock-based compensation expense per diluted share	$ 0.06	$ 0.04