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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Sep. 30, 2016
Debt instrument $ 489.6 $ 490.7
Deferred financing costs 6.0 6.3
Current portion of long-term debt 5.6 5.6
Long-term debt 478.0 478.8
Domestic Line of Credit [Member]    
Debt instrument 0.0 0.0
Secured Debt [Member]    
Debt instrument 488.3 489.4
Other [Member]    
Debt instrument $ 1.3 $ 1.3