Restructuring Restructuring (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Restructuring Cost and Reserve [Line Items]
Employees affected		400
Restructuring Reserve	$ 0.2	$ 1.3
2015 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 7.2
Employees affected	700
Restructuring Reserve	$ 4.1
Other Restructuring Costs	$ 0.4
2014 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs		$ 11.0
Employees affected		150
Restructuring Reserve		$ 2.6
Other Restructuring Costs		$ 1.7
2013 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs			$ 4.3
Employees affected			800
Other Restructuring Costs			$ 1.1