Stock-Based Compensation (Expense Included in Selling, General and Administrative Expenses Related to Stock Options and Restricted Stock Awards) (Details) (Selling, General and Administrative Expenses [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 27, 2015	Mar. 28, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	$ 3.6	$ 3.2
Employee Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	1.1	1.5
Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	1.8	1.0
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	$ 0.7	$ 0.7