Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Current:
Federal	$ 0.1	$ 2.3	$ 3.7
State	0.1	0.7	0.2
Foreign	12.3	12.2	11.7
Total current	12.5	15.2	15.6
Deferred:
Federal	(0.1)	0.2	(5.5)
State	0.7	0.1	0.2
Foreign	(3.1)	(0.2)	1.6
Total deferred	(2.5)	0.1	(3.7)
Total provision	$ 10.0	$ 15.3	$ 11.9