Other Income, net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2012	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Other Income, net
Business interruption insurance settlement			$ (9.6)
Gain on sale of land			(4.9)
Pension curtailment gain				(5.7)
Environmental expense			5.0	2.7
Other Income, net	(9.5)		(9.5)	(3.0)
Reduction in projected plan obligation		$ 1.6