Impairments, Restructuring Charges, and Other Items (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Summary of impairment, restructuring, and other charges
Severance, restructuring costs and special termination benefits	$ 1.5	$ 6.6	$ 3.3	$ 9.4
Business process re-engineering	0.6	0.6	1.0	2.7
Moving costs	0	0	0	0.5
Contingent legal liability and settlements	0	0	1.5	0
Environmental reserve for sold building	0	0.2	1.2	0.2
Total impairments, restructuring charges, and other items	$ 2.1	$ 7.4	$ 7.0	$ 12.8