Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Inventories
Raw materials and supplies	$ 443.4	$ 479.2
Work-in-process and finished goods	526.7	579.2
Less inventory reserves	(41.1)	(41.7)
Inventories, net	$ 929.0	$ 1,016.7