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Restructuring and Acquisition-Related Costs (Details) - USD ($)
$ in Millions
6 Months Ended 9 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Restructuring Reserve [Roll Forward]    
Restructuring Reserve $ 9.8  
Charges 8.5  
Cash utilization (13.8)  
Non-cash utilization 0.0  
Accrual adjustments 0.0  
Restructuring Reserve 4.5 $ 4.5
Other Restructuring [Member]    
Restructuring Reserve [Roll Forward]    
Restructuring Reserve 9.2  
Charges 7.0 17.2
Cash utilization (11.8)  
Non-cash utilization 0.0  
Accrual adjustments 0.0  
Restructuring Reserve 4.4 4.4
Employee Severance [Member]    
Restructuring Reserve [Roll Forward]    
Restructuring Reserve 0.6  
Charges 1.5 2.1
Cash utilization (2.0)  
Non-cash utilization 0.0  
Accrual adjustments 0.0  
Restructuring Reserve $ 0.1 $ 0.1