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	3 Months Ended		9 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 25, 2015	Sep. 26, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	$ 4.9	$ 4.3	$ 11.2	$ 9.8
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	1.0	1.3	3.1	4.1
RSUs/PSUs [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	3.9	3.0	7.4	5.0
RSAs [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation Expense	$ 0.0	$ 0.0	$ 0.7	$ 0.7