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Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Health care cost trend rate | 4.00% |  |
Year that rate reaches ultimate trend rate | 2026 |  |
Costs for defined contribution plans | $ 415 | $ 383 | $ 365
Equity Securities [Member] | Maximum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target asset allocation | 40.00% |  |
Equity Securities [Member] | Minimum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target asset allocation | 15.00% |  |
Venture Capital Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target asset allocation | 10.00% |  |

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- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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