Pension And Postretirement Benefits (Schedule Of Pension Plan Target Allocations And Weighted-Average Asset Allocations By Asset Category) (Details)	Dec. 31, 2021	Dec. 31, 2020
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	44.00%	44.00%
Equity securities \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	15.00%	15.00%
Equity securities \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	75.00%	75.00%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	31.00%	26.00%
Fixed income securities \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	15.00%	15.00%
Fixed income securities \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	75.00%	75.00%
Alternative assets/Other
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	22.00%	27.00%
Alternative assets/Other \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	0.00%	0.00%
Alternative assets/Other \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	45.00%	45.00%
Cash and money market
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	3.00%	3.00%
Cash and money market \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	0.00%	0.00%
Cash and money market \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	10.00%	10.00%

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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=123450688&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=123447040&loc=d3e1928-114920

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- Definition

Percentage of actual 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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