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Restructuring Activities - Restructuring Charges (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Restructuring Cost and Reserve    
Severance costs $ 5.2 $ 1.5
Other restructuring costs 0.0 5.9
Restructuring costs 5.2 7.4
Cost of sales    
Restructuring Cost and Reserve    
Severance costs 2.3 0.5
Other restructuring costs 0.0 5.0
Selling, general, and administrative expenses    
Restructuring Cost and Reserve    
Severance costs 2.9 1.0
Other restructuring costs $ 0.0 $ 0.9