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Restructuring Reserve Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 24 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges     $ 37.7 $ 15.2    
Restructuring and acquisition-related costs $ 11.7 $ 22.8 66.8 90.5    
Restructuring and Related Cost, Total Expected Cost to be Incurred Current Year $ 45.0   45.0   $ 45.0  
2016 Restructuring Plan - Employee Severance [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges         2.8  
2016 Restructuring Plan - Other Restructuring [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges         $ 29.6  
Employee Severance [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges     2.3 1.7    
Other Restructuring [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges     8.8 13.5    
Facility Closing [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges     $ 26.6 $ 0.0    
Minimum [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring and Related Cost, Expected Cost Remaining           $ 10.0
Maximum [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring and Related Cost, Expected Cost Remaining           $ 20.0