Retirement Plans And Other Postretirement Benefits (Schedule Of Percentage Composition Of Assets Held By Pension Plans) (Details)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	100.00%	100.00%	100.00%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	8.60%	7.70%	8.00%
Large/mid-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	18.20%	19.00%	14.70%
Small-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	6.80%	6.40%	5.30%
International and emerging market equity securities
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	16.00%	15.10%	11.50%
Total equity securities
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	41.00%	40.50%	31.50%
Private equity and hedge funds
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	42.30%	44.60%	48.40%
Other assets
Defined Benefit Plan Disclosure [Line Items]
% Composition of Plan Assets at December 31, Total for continuing operations	8.10%	7.20%	12.10%