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Inventories (Detail) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 30, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 72.0 $ 68.1
Finished goods 45.0 34.3
Resale items 21.1 21.8
Other 2.9 3.4
Total $ 141.0 $ 127.6