Restrucutring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Number of Positions Eliminated		1,700
Employee Severance [Member]
Restructuring Charges [Abstract]
Restructuring charges incurred	$ 21.8
Reorganization And Restructuring 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Number of Positions Eliminated		1,700
Reorganization And Restructuring 2014 [Member] | Employee Severance [Member]
Restructuring Charges [Abstract]
Restructuring charges incurred	21.8
Estimated restructuring charges	25	25
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginining balance		0
Expenses		21.8
Payments		(0.3)
Foreign currency exchange effects		(0.1)
Restructuring Reserve, ending balance	21.4	21.4
Reorganization And Restructuring 2014 [Member] | Reduced Direct Costs [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected savings in annual direct costs	(45)	(45)
Reorganization And Restructuring 2014 [Member] | Reduced Direct Costs [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected savings in annual direct costs	$ (50)	$ (50)