Income Tax (Benefit) Expense - Income Tax Expense (Benefit) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Income Taxes [Line Items]
Canada, current	$ 2.4	$ 2.2	$ 0.5
Outside Canada, current	(1.6)	0.5	1.8
Income tax (benefit) expense, current, Total	0.8	2.7	2.3
Canada, deferred	0.6	0.8	4.0
Outside Canada, deferred	3.2	(4.2)	12.3
Income tax (benefit) expense, deferred, Total	3.8	(3.4)	16.3
Income tax expense (benefit)	$ 4.6	$ (0.7)	$ 18.6