v3.26.1
Financial Instruments and Risk Management (Narrative) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
contracts
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
contracts
Jun. 30, 2025
USD ($)
Nov. 13, 2025
USD ($)
Sep. 30, 2025
USD ($)
Derivative [Line Items]            
Total long-term debt, including current maturities $ 1,250.0   $ 1,250.0     $ 1,390.0
Share Repurchase Program, Authorized, Amount         $ 100.0  
Fixed rate debt            
Derivative [Line Items]            
Fair value of long-term debt 1,194.3   1,194.3     1,198.2
Total long-term debt, including current maturities 1,250.0   1,250.0     1,250.0
Designated as hedging instrument | Cash flow hedging | FX contract            
Derivative [Line Items]            
Estimated fair value of derivatives [1] $ 4.1   $ 4.1     (1.4)
Open foreign currency contracts (in contracts) | contracts 64   64      
Derivative, notional amount $ 131.5   $ 131.5      
Not designated as hedging instrument | FX contract            
Derivative [Line Items]            
Estimated fair value of derivatives [1] $ 0.1   $ 0.1     $ 0.1
Open foreign currency contracts (in contracts) | contracts 1   1      
Derivative, notional amount $ 9.0   $ 9.0      
Change in estimate of fair value of foreign currency contracts $ 0.3 $ (0.3) $ 1.0 $ 0.3    
[1] erivative assets are presented in Other current assets or Other assets. Derivative liabilities are presented in Other current liabilities or Other liabilities.