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Employee Benefit Plans (Summary Of Allocation Of Pension Plan Assets) (Details)
Sep. 30, 2018
Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]    
Plan Assets, Target Allocation 100.00% 100.00%
Fixed Income Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Plan Assets, Target Allocation 5.00% 5.00%
Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Plan Assets, Target Allocation 95.00% 95.00%