Restructuring And Asset Impairments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended											12 Months Ended
	Dec. 31, 2011	Apr. 03, 2010	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Dec. 31, 2011 North American Plan [Member]	Jan. 01, 2011 North American Plan [Member]	Jan. 02, 2010 North American Plan [Member]	Jan. 02, 2010 2009 Restructuring Plan [Member]	Dec. 27, 2008 Refocus Plan [Member]	Jan. 01, 2011 Primarily Related To Gain On Contract Termination [Member]	Jan. 02, 2010 Lease Contract Termination Loss [Member]	Dec. 27, 2008 Lease Contract Termination Loss [Member]	Jan. 01, 2011 Lease Contract Termination Loss [Member] North American Plan [Member]	Jan. 02, 2010 Lease Contract Termination Loss [Member] North American Plan [Member]	Jan. 02, 2010 Customer Relationships [Member]
Restructuring Cost and Reserve [Line Items]
Intangible asset impairments			$ 1.4			$ 1.4
Asset impairments	0.6		0.6		3.6
Payments made during the year							5.4	(3.8)	(1.5)					5.4	(3.8)
Settlement of lease obligations							3.0
Gain on other non cash charges							0.1
Restructuring and asset impairments			2.0	(0.5)	5.1	1.4		5.1
Intangible asset impairments	1.4		1.4		3.5											3.6
Other long-term liabilities	20.0		20.0	22.2								3.0	5.8
Accounts payable and accrued liabilities	281.1		281.1	276.6								2.8	3.8
Lease termination benefits				(3.6)			0.4
Severance costs									1.5	1.5
Restructuring charges (credits)		$ (0.5)		$ (0.5)	$ 1.5		$ (0.5)	$ 1.5			$ (0.5)