Income Tax (Benefit) Expense - Reconciliation of Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Income Tax Disclosure [Abstract]
Income tax (benefit) expense based on Canadian statutory rates	$ (0.5)	$ (11.5)	$ 5.7
Foreign tax rate differential	(3.7)	(9.3)	(0.6)
Nontaxable interest income	(5.5)	(9.3)	(9.7)
Nontaxable dividend income	(13.8)	(11.2)	(5.4)
Nontaxable capital (gain) loss	(1.4)	1.5
Dividend income	0.9
Changes in enacted tax rates	1.3	(1.4)	(1.5)
Change in valuation allowance	(0.4)	(29.4)	12.5
(Decrease) increase to uncertain tax positions	(0.6)	1.9	0.8
Non-controlling interests	(2.1)	(1.9)	(1.8)
Equity compensation adjustment to net operating loss		2.7
Permanent differences	1.3	1.7	0.4
Contingent consideration goodwill basis adjustments		1.0	(0.1)
Equity compensation permanent adjustment	0.9	0.6	0.6
Mexico deferred adjustment		2.5
Preferred share costs	0.4
Other items	0.5	0.7	0.9
Income tax (benefit) expense	$ (22.7)	$ (61.4)	$ 1.8