Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 440.7	$ 459.4
Accumulated depreciation	(312.0)	(316.9)
Property, plant and equipment, net	128.7	142.5
Depreciation expense	49.5	49.5	$ 37.3
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2.2	2.5
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	76.7	90.7
Machinery and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	218.0	226.3
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	79.4	77.5
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 64.4	$ 62.4