Restructuring and Other Infrequent Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended	15 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Mar. 31, 2015 employees
Restructuring Cost and Reserve [Line Items]
Restructuring and other infrequent expenses	$ 10.6	$ 0	$ 46.4
Payments for Restructuring	11.8		19.0
Restructuring and Related Cost, Headcount Reduction				1,600
Restructuring Reserve	22.5		25.4	22.5
Foreign currency translation impacting severance and other related costs	1.7			1.7
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other infrequent expenses			$ 44.4