Restructuring And Asset Impairments (Summary Of Restructuring Liabilities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 01, 2011	Jan. 02, 2010
North American Plan [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of year	$ 5.8	$ 9.6
Charge (Gain) to Costs and Expenses	(0.4)
Payments made during the year	5.4	(3.8)
Balance at end of year		5.8
North American Plan [Member] | Lease Contract Termination Loss [Member]
Restructuring Cost and Reserve [Line Items]
Balance at beginning of year	5.8	9.6
Charge (Gain) to Costs and Expenses	(0.4)
Payments made during the year	5.4	(3.8)
Balance at end of year		5.8
2009 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Charge (Gain) to Costs and Expenses		1.5
Payments made during the year		(1.5)
2009 Restructuring Plan [Member] | Severance And Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Charge (Gain) to Costs and Expenses		1.5
Payments made during the year		$ (1.5)