v3.25.4
Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense $ 5.9 $ 9.0
Tax benefit associated with stock-based compensation costs recognized 0.8 1.0
Equity Awards    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 5.9 8.9
Liability Awards    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 0.0 0.1
Time-Vested Restricted Stock Units (TVUs)    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 5.0 5.6
Performance-Based Restricted Stock Units (PSUs)    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 0.6 2.9
Stock Appreciation Rights (SARs)    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 0.3 0.5
Cost of products sold    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 0.8 0.6
Selling and administrative expense    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 5.0 7.4
Research and development expense    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense 0.1 0.1
Other operating (income) expense, net    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total Stock-Based Compensation Expense $ 0.0 $ 0.9