Supplementary Financial Statement Information - Inventory (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Finished and semi-finished	$ 996.5	$ 1,053.4
Raw materials	410.0	494.2
Total cost	1,406.5	1,547.6
Adjustment to state inventories at LIFO value	(180.2)	(375.5)	$ (396.5)	$ (435.0)
Inventory, net	1,226.3	1,172.1
Effect of LIFO inventory liquidation on income	$ 0.0	$ 0.0	$ 11.9