Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Current
Canada	$ (0.2)	$ 0.0	$ 0.0
Outside Canada	12.6	2.3	3.9
Income tax (benefit) expense, current continuing operations, Total	12.4	2.3	3.9
Deferred
Canada	(1.0)	(5.6)	0.0
Outside Canada	(1.9)	(1.5)	(33.9)
Income tax (benefit) expense, deferred continued operations, Total	(2.9)	(7.1)	(33.9)
Income tax expense (benefit)	$ 9.5	$ (4.8)	$ (30.0)