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Business Restructuring Charges - Schedule of Restructuring and Related Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]    
Charged to expense $ 1.0 $ 37.8
Employee Termination    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.1 21.8
Non-Employee Related    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.9 16.0
Cost of products sold    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.3 6.7
Cost of products sold | Employee Termination    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.1 0.4
Cost of products sold | Non-Employee Related    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.2 6.3
Selling and administrative expense    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.0 0.6
Selling and administrative expense | Employee Termination    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.0 0.6
Selling and administrative expense | Non-Employee Related    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.0 0.0
Research and development expense    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.6 11.5
Research and development expense | Employee Termination    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.2 6.8
Research and development expense | Non-Employee Related    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.4 4.7
Other operating expense    
Restructuring Cost and Reserve [Line Items]    
Charged to expense 0.1 19.0
Other operating expense | Employee Termination    
Restructuring Cost and Reserve [Line Items]    
Charged to expense (0.2) 14.0
Other operating expense | Non-Employee Related    
Restructuring Cost and Reserve [Line Items]    
Charged to expense $ 0.3 $ 5.0