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Commitments And Contingent Liabilities (Nuclear Insurance Coverages and Assessments) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Other Commitments [Line Items] |  |
Maximum Aggregate Assessment Per Incident |  | $ 522
Maximum Aggregate Annual Assessment |  | 78
Nuclear Insurance Aggregate Limit |  | 3,240
Total Site Coverage for Nuclear Event [Member] |  |
Other Commitments [Line Items] |  |
Nuclear Liability Total |  | 15,800
Total Site Coverage for Nuclear Event [Member] | American Nuclear Insurers [Member] |  |
Other Commitments [Line Items] |  |
Public And Nuclear Worker Liability Primary Layer |  | 450
Total Site Coverage for Nuclear Event [Member] | American Nuclear Insurers [Member] | Subsequent Event [Member] |  |
Other Commitments [Line Items] |  |
Public And Nuclear Worker Liability Primary Layer | $ 500 |
Retrospective Assessments [Member] |  |
Other Commitments [Line Items] |  |
Replacement Power Total |  | $ 48

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