v3.26.1
Restructuring, Reserve (Details) - Project Momentum Restructuring - USD ($)
$ in Millions
 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Restructuring Reserve [Roll Forward]    
Restructuring reserve, beginning balance $ 8.7 $ 21.7
Charge to Income 76.8 45.9
Cash 48.4 50.3
Non-Cash 26.0 6.3
Restructuring reserve, ending balance 11.1 11.0
Severance & termination related costs    
Restructuring Reserve [Roll Forward]    
Restructuring reserve, beginning balance 7.5 7.2
Charge to Income 26.7 4.0
Cash 23.2 3.8
Non-Cash 0.0 0.0
Restructuring reserve, ending balance 11.0 7.4
Accelerated depreciation & fixed asset write-offs    
Restructuring Reserve [Roll Forward]    
Restructuring reserve, beginning balance 0.0 0.0
Charge to Income 22.0 4.2
Cash 0.0 0.0
Non-Cash 22.0 4.2
Restructuring reserve, ending balance 0.0 0.0
Other restructuring related costs    
Restructuring Reserve [Roll Forward]    
Restructuring reserve, beginning balance 0.9 12.4
Charge to Income 13.2 24.5
Cash 14.0 33.6
Non-Cash 0.0  
Non-cash, net of adjustments   0.0
Restructuring reserve, ending balance 0.1 3.3
US Manufacturing Efficiency Initiatives    
Restructuring Reserve [Roll Forward]    
Restructuring reserve, beginning balance 0.0  
Charge to Income 14.9  
Cash 10.9  
Non-Cash 4.0  
Restructuring reserve, ending balance 0.0  
IT enablement    
Restructuring Reserve [Roll Forward]    
Restructuring reserve, beginning balance 0.3 2.1
Charge to Income 0.0 13.2
Cash 0.3 12.9
Non-Cash 0.0 2.1
Restructuring reserve, ending balance $ 0.0 $ 0.3