Other Expense, Net - Schedule of Other Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Other Income and Expenses [Abstract]
Interest income	$ 0.7	$ 0.4	$ 0.3
Interest expense	(2.7)	(3.8)	(3.8)
Dividend income	1.5	1.2	0.9
Foreign exchange (losses) gains	(1.1)	1.6	(0.9)
Other	0.0	(0.1)	0.0
Other expense, net	$ (1.6)	$ (0.7)	$ (3.5)	[1]

[1] Fiscal year included 53 weeks.