Impairments, Restructuring Charges, and Other Items (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Summary of impairment, restructuring, and other charges
Severance, restructuring costs and special termination benefits	$ 0.8	$ 1.2
Business process re-engineering	0.7	0.2
Contingent legal liability and settlements	0	1.5
Environmental reserve for sold building	0	1.2
Total impairments, restructuring charges, and other items	$ 1.5	$ 4.1