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Restructuring, Impairment and Transaction-Related Charges (Restructuring, Impairment and Transaction-Related Charges) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2021
USD ($)
plant
Mar. 31, 2020
USD ($)
Restructuring Cost and Reserve [Line Items]    
Value-added tax assessment $ 2.6  
Impairment charges 0.8 $ 2.5
Transaction-related charges 0.2 0.5
Employee termination charges $ 4.7 12.6
Facilities Idled    
Restructuring Cost and Reserve [Line Items]    
Gain from sale of properties   $ 2.9
2010 Restructuring Program    
Restructuring Cost and Reserve [Line Items]    
Number of plant closures | plant 50