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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, 2019
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	5.00%
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	2.00%
Large/mid-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Target % Composition of Plan Assets, Total for continuing operations	27.00%
Expected Long-term Return %, Total for continuing operations	5.80%
Small-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Target % Composition of Plan Assets, Total for continuing operations	8.00%
Expected Long-term Return %, Total for continuing operations	6.90%
International and emerging market equity securities
Defined Benefit Plan Disclosure [Line Items]
Target % Composition of Plan Assets, Total for continuing operations	20.00%
Expected Long-term Return %, Total for continuing operations	5.80%
Total equity securities
Defined Benefit Plan Disclosure [Line Items]
Target % Composition of Plan Assets, Total for continuing operations	55.00%
Expected Long-term Return %, Total for continuing operations	6.00%
Private equity and hedge funds
Defined Benefit Plan Disclosure [Line Items]
Target % Composition of Plan Assets, Total for continuing operations	33.00%
Expected Long-term Return %, Total for continuing operations	4.50%

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- Definition

An assumption as to the rate of return on plan assets at the end of the year that reflects the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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