Other Charges, Net - Restructuring Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring charges
Restructuring expenses	$ 0.7	$ 3.8	$ 4.2	$ 3.9
Costs of product revenue
Restructuring charges
Restructuring expenses	0.1	1.4	0.3
Other charges, net
Restructuring charges
Restructuring expenses	$ 0.6	$ 2.4	$ 3.9	$ 3.9