Inventories - Summary of Inventories (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 30, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 77.0	$ 68.1
Finished goods	39.7	34.3
Resale items	20.6	21.8
Other	2.4	3.4
Total	$ 139.7	$ 127.6