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Restructuring Expenses and Impairment Charges (Restructuring Expense Activity) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Restructuring Reserve [Roll Forward]          
Restructuring reserve, beginning of period $ 7.2 $ 6.8   $ 6.8  
Quarterly provision 6.1 1.4 $ 0.4 7.5 $ 3.4
Quarterly cash activity (1.7) (1.0)      
Foreign currency translation (0.4) 0.0      
Restructuring reserve, end of period 11.2 7.2   11.2  
Employee Severance          
Restructuring Reserve [Roll Forward]          
Restructuring reserve, beginning of period 7.2 6.8   6.8  
Quarterly provision 4.1 1.4      
Quarterly cash activity (1.7) (1.0)      
Foreign currency translation (0.4) 0.0      
Restructuring reserve, end of period 9.2 7.2   9.2  
Other Related Closure Costs          
Restructuring Reserve [Roll Forward]          
Restructuring reserve, beginning of period 0.0 0.0   0.0  
Quarterly provision 2.0 0.0      
Quarterly cash activity 0.0 0.0      
Foreign currency translation 0.0 0.0      
Restructuring reserve, end of period $ 2.0 $ 0.0   $ 2.0