Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 474.7	$ 440.7
Accumulated depreciation	(334.8)	(312.0)
Property, plant and equipment, net	139.9	128.7
Depreciation expense	49.2	49.5	$ 49.5
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2.2	2.2
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	84.7	76.7
Machinery and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	218.1	218.0
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	96.4	79.4
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 73.3	$ 64.4