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Summary of Significant Accounting Policies - Property, Plant and Equipment Summary (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 892.8 $ 861.8
Accumulated depreciation (472.0) (428.3)
Total property, plant and equipment, net 420.8 433.5
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 319.3 313.0
Land and buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 328.5 315.5
Computer equipment and software    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 142.2 113.4
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 50.4 56.7
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 52.4 $ 63.2