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Restructuring and Related Activities - Costs Recognized and Remaining Costs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 2.1 $ 10.2 $ 10.1
Restructuring Charges [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 1.7 6.2 8.6
Cost of Goods Sold, Restructuring Charges [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 0.4 4.0 1.5
Severance Pay and Benefits      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 2.1 8.4 7.5
Facility Closing [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 0.0 $ 1.8 $ 2.6