Inventory Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Inventory Reserve	$ 50.9	$ 69.8
Inventory Write-down	4.3	(69.6)	$ (0.2)
Excess of Replacement or Current Costs over Stated LIFO Value	0.1	0.3
Cost of goods sold [Member]
Effect of LIFO Inventory Liquidation on Income	34.5	6.4	$ 0.3
LIFO inventory [Member]
Inventory Reserve	$ 49.8	$ 55.3