Other Financial Information - Property, Plant And Equipment, Net (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 642.5	$ 648.4
Less: Accumulated depreciation	(254.1)	(220.8)
Property, plant and equipment, net	388.4	427.6
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	338.1	322.4
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	242.8	255.5
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	42.4	47.4
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 19.2	$ 23.1