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Restructuring Charges (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]      
Restructuring and related costs $ 16.2 $ 30.1 $ 38.1
Project Fuel      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges incurred to date   163.7  
FY23 Restructuring outlook      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 18.0    
Obsolescence | Cost of products sold      
Restructuring Cost and Reserve [Line Items]      
Restructuring and related costs   0.6 0.2
IT enablement | Selling, general and administrative expense      
Restructuring Cost and Reserve [Line Items]      
Restructuring and related costs $ 0.9 $ 8.7 $ 13.3