Share-Based Compensation (Schedule Of Share-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended							3 Months Ended	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Jan. 01, 2011 Stock Options [Member]	Jan. 02, 2010 Stock Options [Member]	Jan. 01, 2011 PSUs [Member]	Jan. 02, 2010 PSUs [Member]	Oct. 01, 2011 Performance-Based RSUs [Member]	Dec. 31, 2011 Performance-Based RSUs [Member]	Jan. 01, 2011 Performance-Based RSUs [Member]	Dec. 31, 2011 Time-Based RSUs [Member]	Jan. 01, 2011 Time-Based RSUs [Member]	Dec. 31, 2011 Director Share Units [Member]	Jan. 01, 2011 Director Share Units [Member]	Jan. 01, 2011 Share appreciation rights [Member]	Jan. 02, 2010 Share appreciation rights [Member]	Jan. 02, 2010 Restricted Stock [Member]	Jan. 02, 2010 Interim CEO Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 2.9	$ 4.7	$ 1.3	$ 1.0	$ 0.1	$ 0.2	$ 0.8	$ 3.3	$ (1.2)	$ 1.4	$ 3.4	$ 1.3	$ 0.7	$ 0.7	$ 0.1	$ 0.4	$ 0.1	$ (0.1)