Inventories - Additional Information (Detail) - USD ($) $ in Millions	Oct. 01, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials and supplies in inventory, percentage	40.00%	38.00%
Finished and semi-finished products in inventory, percentage	60.00%	62.00%
Inventories valued using the last-in, first-out	49.00%	48.00%
Increased value of inventory if FIFO method had been used	$ 206.3	$ 100.6
Lower of cost or market adjustments	$ 8.9	$ 5.1