Inventories (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory [Line Items]
reserve balance obsolete and slow moving inventories	$ 19.7	$ 21.5
Finished goods	287.2	300.0
Work in process	5.1	4.2
Raw materials and repair parts	183.4	178.3
Total	475.7	482.5
Excess of current cost over last-in, first-out cost	(57.2)	(63.7)
Total inventories, net	418.5	418.8
Pre-tax income (loss) from LIFO inventory liquidations	$ 0.2	$ 0.2	$ 0.9