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Supplemental Balance Sheet Information - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 280.8   $ 283.2
Less accumulated depreciation (102.1)   (98.7)
Total 178.7   184.5
Depreciation expense 5.8 $ 3.6  
Land      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 0.8   1.0
Buildings      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 45.4   48.3
Machinery and equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 215.0   215.0
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 19.6   18.9
IT Platform And Post-Divestiture      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross     $ 59.3