Income Taxes - Provisions for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Current expense:
Federal	$ 6.7	$ 48.1	$ 16.0
State	2.4	1.9	1.4
Foreign	10.9	14.0	11.3
Deferred expense (credit):
Federal	2.1	(72.0)	(6.9)
State	3.3	(0.2)	(0.3)
Foreign	1.7	(1.7)	1.5
Total provision for income taxes	$ 27.1	$ (9.9)	$ 23.0