Debt (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Summary of Long Term Debt
Total Debt	$ 62.5	$ 52.6	$ 65.5
Less current portion		0.4	0.1
Long-term debt	62.5	52.2	65.4
Revolving credit facility [Member]
Summary of Long Term Debt
Total Debt	62.4	52.1	65.3
Other obligations [Member]
Summary of Long Term Debt
Total Debt	$ 0.1	$ 0.5	$ 0.2