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Revenue Recogniton Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Document Period End Date | Dec. 31, 2024 |  |
Regulated Operating Revenue, Electric, Non-Nuclear | $ 2,839 | $ 2,439 | $ 2,205
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price | (40) | 11 | 11
Deferred Revenue, Revenue Recognized | 16 | 3 | 7
Regulated Operating Revenue | 2,815 | 2,447 | 2,223
Unregulated Operating Revenue | 558 | 418 | 363
Regulated and Unregulated Operating Revenue | 67 | 58 | 61
Total Revenues | 3,440 | 2,923 | 2,647
Gain on Derivative Instruments, Pretax | 273 | 185 | 133
Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Regulated Operating Revenue, Electric, Non-Nuclear | 1,457 | 1,263 | 1,158
Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Regulated Operating Revenue, Electric, Non-Nuclear | 914 | 800 | 723
Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Regulated Operating Revenue, Electric, Non-Nuclear | 435 | 349 | 289
Direct Access customers [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Regulated Operating Revenue, Electric, Non-Nuclear | $ 33 | $ 27 | $ 35

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