v3.23.1
Restructuring, Reserve (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Project Momentum Restructuring      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   $ 0.9  
Charge to Income   14.1  
Cash   7.7  
Non-Cash   0.9  
Restructuring Reserve, Ending Balance   6.4  
2020 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.7 $ 1.6
Charge to Income $ 1.4 0.0  
Cash 2.3 0.6  
Non-Cash 0.0 0.0  
Restructuring Reserve, Ending Balance 0.7 0.1 0.7
2019 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.1 4.1
Charge to Income   0.0 3.9
Cash   0.1 6.7
Non-Cash   0.0 1.2
Restructuring Reserve, Ending Balance 0.1 0.0 0.1
Severance & termination related costs | Project Momentum Restructuring      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.0  
Charge to Income   5.5  
Cash   0.6  
Non-Cash   0.0  
Restructuring Reserve, Ending Balance   4.9  
Severance & termination related costs | 2020 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.7 0.9
Charge to Income 0.3 0.0  
Cash 0.5 0.6  
Non-Cash 0.0 0.0  
Restructuring Reserve, Ending Balance 0.7 0.1 0.7
Severance & termination related costs | 2019 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.1 1.4
Charge to Income   0.0 (0.1)
Cash   0.1 1.2
Non-Cash   0.0 0.0
Restructuring Reserve, Ending Balance 0.1 0.0 0.1
Accelerated depreciation & asset write-offs | Project Momentum Restructuring      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.0  
Charge to Income   0.9  
Cash   0.0  
Non-Cash   0.9  
Restructuring Reserve, Ending Balance   0.0  
Accelerated depreciation & asset write-offs | 2019 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance     0.0
Charge to Income     1.2
Cash     0.0
Non-Cash     1.2
Restructuring Reserve, Ending Balance 0.0   0.0
Other restructuring related costs | Project Momentum Restructuring      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance   0.9  
Charge to Income   7.7  
Cash   7.1  
Non-Cash   0.0  
Restructuring Reserve, Ending Balance   $ 1.5  
Other restructuring related costs | 2020 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance     0.7
Charge to Income 1.1    
Cash 1.8    
Non-Cash 0.0    
Restructuring Reserve, Ending Balance 0.0   0.0
Other restructuring related costs | 2019 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance     2.2
Charge to Income     2.8
Cash     5.0
Non-Cash     0.0
Restructuring Reserve, Ending Balance $ 0.0   0.0
Net gain on sale of fixed assets | 2019 Restructuring Program      
Restructuring Reserve [Roll Forward]      
Restructuring Reserve, Beginning Balance     0.5
Charge to Income     0.0
Cash     $ 0.5