Other Charges, Net - Restructuring Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring charges
Restructuring expenses	$ 3.5	$ 0.1
Costs of product revenue
Restructuring charges
Restructuring expenses	0.2	(1.4)
Other charges, net
Restructuring charges
Restructuring expenses	$ 3.3	$ 1.5