v3.25.4
Restructuring (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]    
Total restructuring and related costs $ 30.9 $ 20.3
Selling, general and administrate expense (SG&A) | US Manufacturing Efficiency Initiatives    
Restructuring Cost and Reserve [Line Items]    
Total restructuring and related costs 6.1 0.0
Selling, general and administrate expense (SG&A) | IT enablement    
Restructuring Cost and Reserve [Line Items]    
Total restructuring and related costs 0.0 6.1
Project Momentum Restructuring Program    
Restructuring Cost and Reserve [Line Items]    
Total restructuring and related costs 24.8 14.2
Project Momentum Restructuring Program | Costs of products sold (COGS)    
Restructuring Cost and Reserve [Line Items]    
Severance and related benefit costs 1.9 0.1
Accelerated depreciation & fixed asset write-offs 2.7 0.8
Other restructuring related costs 4.6 8.5
Project Momentum Restructuring Program | Selling, general and administrate expense (SG&A)    
Restructuring Cost and Reserve [Line Items]    
Severance and related benefit costs 14.8 1.3
Accelerated depreciation & fixed asset write-offs 0.0 0.9
Other restructuring related costs $ 0.8 $ 2.6