Other Income (Expense) - Net - Computation of Other Income (Expense) - Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Other Income and Expenses [Abstract]
Interest income	$ 1.5	$ 0.6	$ 0.3
Net foreign exchange loss	(3.6)	(3.9)	(7.0)
Net periodic pension and postretirement benefits (costs) - non-service	10.4	3.7	(0.6)
Settlement of treasury lock	0.0	13.3	0.0
Loss on early extinguishment of debt	0.0	(7.8)	0.0
Other	0.5	(1.7)	(0.5)
Total other income (expense) – net	$ 8.8	$ 4.2	$ (7.8)