Equity-Based Compensation (Schedule Of Total Equity-Based Compensation Expense By Type) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 24.6	$ 27.0	$ 20.7
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	4.8	5.1	5.4
Cash-Settled SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	(0.3)	0.2	0.1
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	16.9	17.0	12.5
Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 3.2	$ 4.7	$ 2.7