Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Inventories — gross:
Raw materials	$ 73.9	$ 68.2
Work-in-process	18.9	18.3
Finished goods	86.9	85.1
Total inventories — gross	179.7	171.6
Excess and obsolete inventory reserve	(23.5)	(22.5)
Net inventories at FIFO cost	156.2	149.1
Excess of FIFO costs over LIFO value	(3.9)	(3.5)
Inventories — net	$ 152.3	$ 145.6