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Restructuring Expenses (Details)
$ in Millions
 3 Months Ended 60 Months Ended
Mar. 31, 2019
USD ($)
employees
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
employees
Restructuring Cost and Reserve [Line Items]      
Restructuring and related cost, headcount reduction (approximately) | employees 30   3,890
Restructuring Reserve [Roll Forward]      
Restructuring reserve, beginning of period $ 7.1    
Restructuring provision (1.7) $ (5.9)  
Less: Non-cash activity (0.3)    
Cash expense 1.4    
Restructuring cash activity (2.6)    
Foreign currency translation 0.1    
Restructuring reserve, end of period 5.8   $ 7.1
Write-down of Property, Plant and Equipment      
Restructuring Reserve [Roll Forward]      
Restructuring reserve, beginning of period 0.0    
Restructuring provision (0.3)    
Less: Non-cash activity (0.3)    
Cash expense 0.0    
Restructuring cash activity 0.0    
Foreign currency translation 0.0    
Restructuring reserve, end of period 0.0   0.0
Employee Severance      
Restructuring Reserve [Roll Forward]      
Restructuring reserve, beginning of period 7.1    
Restructuring provision (1.4)    
Less: Non-cash activity 0.0    
Cash expense 1.4    
Restructuring cash activity (2.6)    
Foreign currency translation (0.1)    
Restructuring reserve, end of period $ 5.8   $ 7.1