Restructuring and Other Infrequent Expenses (Details) $ in Millions	3 Months Ended		12 Months Ended		24 Months Ended
	Mar. 31, 2016 USD ($) employees	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) employees
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, headcount reduction | employees	200				2,100
Payments for restructuring	$ 3.4		$ 48.5	$ 68.7
Restructuring and other infrequent expenses	1.9	$ 10.6
Restructuring reserve	16.0		$ 16.9		$ 16.9
Foreign currency translation impacting severance and other related costs	0.6
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other infrequent expenses	$ 1.9