Other (Income) Expense, net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Sep. 30, 2011	Mar. 31, 2011	Mar. 31, 2010	Dec. 31, 2011 Entity	Dec. 31, 2010	Dec. 31, 2009
Other (Income) Expense, net
Pension curtailment gain				$ 5.7
Environmental expense				2.7	3.5	1.7
Legal settlement expense						7.5
Contingent payment received on sale of EBGI business						(1.7)
Other (income) expense, net	2.7	(5.7)	3.5	(3.0)	3.5	7.5
Reduction in projected plan obligation		$ 1.6
Number of businesses sold (in entities)				2