Other - Other Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Severance and employee benefits	$ 1.0	$ 0.3	$ 1.0	$ 0.4
Facility charges	0.2	0.0	0.2	0.0
Non-cash share based compensation	0.0	0.1	0.0	0.0
Reorganization-related	1.2	0.4	1.2	0.4
Acquisition related costs	10.3	0.0	11.9	0.0
Transitioned employees restructuring expense	1.7	0.6	2.5	0.8
Other	12.0	0.6	14.4	0.8
Total other	$ 13.2	$ 1.0	$ 15.6	$ 1.2