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Employee Benefit Plans (Schedule Of Allocation Of Plan Assets) (Details)
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Asset Category 100.00% 100.00%
Equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Asset Category 53.00% 55.00%
Debt securities    
Defined Benefit Plan Disclosure [Line Items]    
Asset Category 23.00% 21.00%
Stable value funds    
Defined Benefit Plan Disclosure [Line Items]    
Asset Category 16.00% 14.00%
Other, including cash    
Defined Benefit Plan Disclosure [Line Items]    
Asset Category 8.00% 10.00%