Restructuring And Other Charges (Summary Of Restructuring And Other Charges) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Restructuring Cost and Reserve [Line Items]
Total restructuring and other charges	$ 20.3	$ 9.5	$ 11.7
Severance And Other Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and other charges	15.9	6.9	6.6
Facility And Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and other charges	3.8	2.6	5.1
Other Obligations [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and other charges	$ 0.6