Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 511.4	$ 474.7
Accumulated depreciation	(370.8)	(334.8)
Property, plant and equipment, net	140.6	139.9
Depreciation expense	53.4	49.2	$ 49.5
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2.3	2.2
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	87.1	84.7
Machinery and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	223.3	218.1
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	117.8	96.4
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 80.9	$ 73.3