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Retirement Plans (Schedule of Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost) (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Pension Benefits [Member] |  |  |
Assumptions to determine benefit obligations: |  |  |
Discount rate | 5.01% | 5.78% | 2.71%
Assumptions to determine net periodic benefit cost: |  |  |
Discount rate - interest cost | 5.61% | 2.18% | 2.11%
Expected return on plan assets | 6.21% | 4.80% | 5.00%
Postretirement Benefits [Member] |  |  |
Assumptions to determine benefit obligations: |  |  |
Discount rate | 4.96% | 5.71% | 2.34%
Assumptions to determine net periodic benefit cost: |  |  |
Discount rate - service cost | 5.81% | 2.83% | 2.51%
Discount rate - interest cost | 5.49% | 1.57% | 1.01%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan, interest cost component. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan, service cost component. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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