Income Taxes - Provisions for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Current expense:
Federal	$ 0.7	$ 10.6	$ 6.7
State	0.6	0.5	2.4
Foreign	8.3	12.5	10.9
Deferred expense (credit):
Federal	(51.6)	(5.8)	2.1
State	(4.4)	(2.0)	3.3
Foreign	0.9	1.2	1.7
Total provision for income taxes	$ (45.5)	$ 17.0	$ 27.1