Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Current
Canada	$ 0.0	$ (0.2)	$ 0.0
Outside Canada	1.9	12.2	3.8
Income tax expense (benefit), Current	1.9	12.0	3.8
Deferred
Canada	0.0	(1.0)	(5.6)
Outside Canada	2.4	(6.5)	(6.5)
Income tax expense (benefit) , Deferred	2.4	(7.5)	(12.1)
Income tax expense (benefit)	$ 4.3	$ 4.5	$ (8.3)