Restructuring (Details) $ in Millions	3 Months Ended			6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2014	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Severance Costs					$ 11.0
Restructuring Reserve	$ 0.8	$ 1.3		$ 0.8	2.6
2015 Restructure Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	2.4			$ 3.4
Employees affected				200
Restructuring Reserve	1.4	1.0		$ 1.4
2014 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs					1.7
Employees affected			400
Restructuring Reserve	0.7	0.8		0.7	$ 1.3
Business Acquisition, Acquiree 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs		0.3
Employees affected					150
Restructuring Reserve	$ 0.3	$ 0.3		$ 0.3