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Retirement Plans And Other Postretirement Benefits (Schedule Of Targeted Allocation Percentage For Pension Plan Assets And Expected Long-Term Rate Of Return On Assets) (Details)
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 100.00%
Expected Long-term Return %, Total for continuing operations 6.00%
Fixed income securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 12.00%
Expected Long-term Return %, Total for continuing operations 3.20%
Large/mid-capitalization equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 19.00%
Expected Long-term Return %, Total for continuing operations 6.10%
Small-capitalization equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 6.00%
Expected Long-term Return %, Total for continuing operations 6.60%
International and emerging market equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 18.00%
Expected Long-term Return %, Total for continuing operations 7.30%
Total equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 43.00%
Expected Long-term Return %, Total for continuing operations 6.70%
Private equity and hedge funds  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 45.00%
Expected Long-term Return %, Total for continuing operations 6.10%