Other Income (Expense) - Net - Computation of Other Income (Expense) - Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Other Income and Expenses [Abstract]
Interest income	$ 0.3	$ 0.6	$ 0.5
Net foreign exchange loss	(7.0)	(1.3)	(2.7)
Other	(0.5)	0.1	(0.2)
Total other income (expense) - net	$ (7.2)	$ (0.6)	$ (2.4)