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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)
 12 Months Ended
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 100.00% [1]
Expected Long-term Return %, Total for continuing operations 6.50%
Fixed income securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 22.00% [1]
Expected Long-term Return %, Total for continuing operations 3.80%
Large/mid-capitalization equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 14.00% [1]
Expected Long-term Return %, Total for continuing operations 8.40%
Small-capitalization equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 5.00% [1]
Expected Long-term Return %, Total for continuing operations 9.50%
International and emerging market equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 13.00% [1]
Expected Long-term Return %, Total for continuing operations 8.60%
Total equity securities  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 32.00% [1]
Expected Long-term Return %, Total for continuing operations 8.70%
Private equity and hedge funds  
Defined Benefit Plan Disclosure [Line Items]  
Target % Composition of Plan Assets, Total for continuing operations 46.00% [1]
Expected Long-term Return %, Total for continuing operations 6.30%
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