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Significant Accounting Policies And Practices (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Significant Accounting Policies [Line Items]      
Debt issuance costs $ 57.6 $ 76.1  
Shipping and handling costs 217.8 193.2 $ 192.5
Advertising costs 24.1 30.9 34.1
Exchange losses on foreign currency transactions $ 4.7 4.7 4.9
Percentage greater than the largest amount of recognized income tax positions which likely of being realized 50.00%    
Net periodic benefit cost $ 3.5 4.7 3.2
Service cost 2.0 2.5 2.0
Accounting Standards Update 2017-07 [Member]      
Significant Accounting Policies [Line Items]      
Net periodic benefit cost 3.5 4.7 3.2
Service cost 2.0 2.5 2.0
Other cost $ 1.5 $ 2.2 $ 1.2