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Retirement Plans And Other Postretirement Benefits (Schedule Of Percentage Composition Of Assets Held By Pension Plans) (Details) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
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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 | 7.70% | 8.00% | 12.80%
Large/mid-capitalization equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
% Composition of Plan Assets at December 31, Total for continuing operations | 19.00% | 14.70% | 13.80%
Small-capitalization equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
% Composition of Plan Assets at December 31, Total for continuing operations | 6.40% | 5.30% | 4.00%
International and emerging market equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
% Composition of Plan Assets at December 31, Total for continuing operations | 15.10% | 11.50% | 10.90%
Total equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
% Composition of Plan Assets at December 31, Total for continuing operations | 40.50% | 31.50% | 28.70%
Private equity and hedge funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
% Composition of Plan Assets at December 31, Total for continuing operations | 44.60% | 48.40% | 52.40%
Other assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
% Composition of Plan Assets at December 31, Total for continuing operations | 7.20% | 12.10% | 6.10%

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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