Income Tax (Benefit) Expense (Income Tax (Benefit) Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Income Tax (Benefit) Expense [Abstract]
Canada, current	$ 2.2	$ 0.5	$ (20.2)
Outside Canada, current	0.5	1.8	(8.8)
Income tax (benefit) expense, current, Total	2.7	2.3	(29.0)
Canada, deferred	0.8	4.0	3.3
Outside Canada, deferred	(4.2)	12.3	2.9
Income tax (benefit) expense, deferred, Total	(3.4)	16.3	6.2
Income tax (benefit) expense	$ (0.7)	$ 18.6	$ (22.8)