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Business Segments (Schedule of Revenue, By Products and Services) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | $ 30,357 | $ 29,060 | $ 28,768
Total Reportable Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 30,319 | 29,023 | 28,738
Electric Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 28,020 | 26,846 | 25,990
Gas Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,299 | 2,177 | 2,748
Operating Segments | Total Reportable Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 30,483 | 29,187 | 28,864
Operating Segments | Electric Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 28,093 | 26,921 | 26,024
Operating Segments | Gas Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,390 | 2,266 | 2,840
Operating Segments | Retail Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 24,593 | 23,484 | 22,036
Operating Segments | Retail Electric | Electric Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 24,593 | 23,484 | 22,036
Operating Segments | Wholesale Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,219 | 2,193 | 2,882
Operating Segments | Wholesale Electric | Electric Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,219 | 2,193 | 2,882
Operating Segments | Retail Natural Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,320 | 2,199 | 2,535
Operating Segments | Retail Natural Gas | Gas Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,320 | 2,199 | 2,535
Operating Segments | Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 1,351 | 1,311 | 1,411
Operating Segments | Other | Electric Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 1,281 | 1,244 | 1,106
Operating Segments | Other | Gas Utilities and Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | $ 70 | $ 67 | $ 305

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