Other Expense, Net - Schedule of Other Nonoperating Income (Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Other Income and Expenses [Abstract]
Interest income	$ 0.2	$ 0.2	$ 0.6	$ 0.5
Interest expense	(0.7)	(0.7)	(2.3)	(1.8)
Dividend income	0.0	0.0	0.8	0.7
Foreign exchange gain (loss)	(0.2)	0.1	(0.9)	(1.9)
Other expense, net	$ (0.7)	$ (0.4)	$ (1.8)	$ (2.5)