Share-Based Compensation (Expense Related to Non-vested Stock Awards) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 26, 2014		Sep. 27, 2013		Sep. 26, 2014		Sep. 27, 2013
Total pre-tax share-based compensation expense	$ 3.4		$ 3.7		$ 12.6		$ 10.2
Excess tax benefit (deficiency) on share-based compensation	(0.5)	[1]	0	[1]	(0.6)	[1]	0.1	[1]
Non-Qualified Stock Option Expense [Member]
Total pre-tax share-based compensation expense	0.5		1.5		2.3		4.2
Non-Vested Stock Awards Expense [Member]
Total pre-tax share-based compensation expense	2.8		2.2		9.5		6.0
Immediately Vested Stock Awards Expense [Member]
Total pre-tax share-based compensation expense	$ 0.1		$ 0		$ 0.8		$ 0

[1] Cash inflows (outflows) recognized as financing activities in the Condensed Consolidated Statements of Cash Flows.