Components Of Net Inventories (Detail) - USD ($) $ in Millions	Mar. 30, 2018	Dec. 29, 2017	[1]
Inventory, Net [Abstract]
Raw materials	$ 91.0	$ 85.2
Work-in-process	11.7	12.4
Finished goods	186.4	167.0
Total inventories	$ 289.1	$ 264.6	[2],[3]

[1] See Note 2 for a summary of adjustments

[2] See Note 2 for a summary of adjustments

[3] See Note 2 for a summary of adjustments