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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Sep. 30, 2017
Unsecured Debt $ 451.6 $ 486.5
Debt Issuance Costs, Net (7.4)  
Current portion of long-term debt (0.7) (5.6)
Long-term debt, excluding current maturities 444.3 475.0
Revolving Credit Facility [Member]    
Unsecured Debt 0.0 0.0
Debt Issuance Costs, Net (0.8)  
Secured Debt [Member]    
Unsecured Debt 0.0 484.8
Debt Issuance Costs, Net (6.6) (5.9)
Other [Member]    
Unsecured Debt 1.6 1.7
Unsecured Debt [Member]    
Unsecured Debt 450.0 $ 0.0
Debt Issuance Costs, Net $ (6.6)