Balance Sheet Accounts and Supplemental Disclosures - Property, Plant and Equipment, net (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	$ 1,081.4	$ 1,064.5
Less: accumulated depreciation	(658.3)	(654.6)
Property, plant and equipment, net	423.1	409.9
Depreciation expense	49.2	58.1	$ 56.1
Non-cash property, plant and equipment additions	8.6
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	71.2	71.2
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	433.4	434.9
Machinery and equipment, including capitalized software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	471.3	488.2
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 105.5	$ 70.2