Income Taxes - Provisions for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Current expense:
Federal	$ 48.1	$ 16.0	$ 48.9
State	1.9	1.4	5.2
Foreign	14.0	11.3	11.6
Deferred expense (credit):
Federal	(72.0)	(6.9)	(22.0)
State	(0.2)	(0.3)	(1.9)
Foreign	(1.7)	1.5	(0.4)
Total provision for income taxes	$ (9.9)	$ 23.0	$ 41.4