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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Sep. 30, 2023
May 28, 2021
Total debt $ 452.7 $ 451.3  
Less deferred financing costs 4.5    
Current portion of long-term debt 0.8 0.7  
Long-term debt 448.7 446.7  
Unsecured Debt [Member]      
Senior notes 450.0 450.0  
Total debt     $ 450.0
Less deferred financing costs 3.2 3.9  
Other [Member]      
Finance leases $ 2.7 $ 1.3