Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 43.5	$ 45.2
Work in process	18.8	17.3
Finished goods	39.2	36.1
Supplies and other	9.5	13.8
Total	$ 111.0	$ 112.4