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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Sep. 30, 2018
Unsecured Debt $ 452.1 $ 451.6
Debt Issuance Costs, Net (6.3)  
Current portion of long-term debt (0.9) (0.7)
Long-term debt, excluding current maturities 445.4 444.3
Revolving Credit Facility [Member]    
Unsecured Debt 0.0 0.0
Debt Issuance Costs, Net (0.5)  
Secured Debt [Member]    
Debt Issuance Costs, Net (5.8) (6.6)
Other [Member]    
Unsecured Debt 2.1 1.6
Unsecured Debt [Member]    
Unsecured Debt   450.0
5.5% Senior Notes 450.0 $ 450.0
Debt Issuance Costs, Net $ (5.8)