Inventories Inventories Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Inventory [Line Items]
LIFO inventory amount	$ 253.6	$ 370.8
Excess of replacement or current costs over stated LIFO value	90.2	94.6
Effect of LIFO inventory liquidation on income	2.3	$ 0.0	$ 0.1
Surface Technologies
Inventory [Line Items]
Inventory write-down	$ 41.1