Restructuring and other - Restructuring and Other Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 9.2	$ 2.7
Employee severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other	2.7	2.3
Acquisitions and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other	3.4	0.0
Restructuring, integration and other
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 3.1	$ 0.4