INVENTORIES, NET - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Cost of inventories determined by LIFO method	$ 12.4	$ 8.6
Cost of inventories determined by LIFO method, amount of increase if FIFO method was used	10.6	6.8
Inventory valuation reserve	$ 71.7	$ 37.5