Inventories (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 402.9	$ 330.5
Work in process	6.0	10.0
Raw materials and repair parts	198.8	229.1
Total	607.7	569.6
Excess of current cost over last-in, first-out cost	(63.6)	(59.8)
Total inventories, net	544.1	509.8
Pre-tax income (loss) from LIFO inventory liquidations	0.2	0.0
Reserve balance obsolete and slow moving inventories	$ 19.2	$ 16.5