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Goodwill and Other Intangible Assets (Goodwill Roll Forward) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2024 | Jun. 30, 2024
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  | $ 3,745 | $ 3,748 |  |  |
Accumulated impairment losses |  | (3,400) | (3,400) |  |  |
Net balance | $ 362 | 345 | 348 | $ 362 | $ 348 | $ 348
Goodwill impairment expense |  | 0 | (12) | $ (777) |  |
Disposal Group, Including Discontinued Operation, Goodwill |  | (3) |  |  |  |
Operating Segments [Member] | Renewables |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  | 353 | 353 |  |  |
Accumulated impairment losses |  | (35) | (35) |  |  |
Net balance |  | 318 | 318 |  |  |
Disposal Group, Including Discontinued Operation, Goodwill |  | 0 |  |  |  |
Operating Segments [Member] | Utilities |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  | 2,709 | 2,709 |  |  |
Accumulated impairment losses |  | (2,709) | (2,709) |  |  |
Net balance |  | 0 | 0 |  |  |
Goodwill impairment expense | $ (133) |  |  |  |  |
Disposal Group, Including Discontinued Operation, Goodwill |  | 0 |  |  |  |
Operating Segments [Member] | Energy Infrastructure |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  | 683 | 683 |  |  |
Accumulated impairment losses |  | (656) | (656) |  |  |
Net balance |  | 27 | 27 |  |  |
Disposal Group, Including Discontinued Operation, Goodwill |  | 0 |  |  |  |
Operating Segments [Member] | New Energy Technologies |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill |  | 0 | 3 |  |  |
Accumulated impairment losses |  | 0 | 0 |  |  |
Net balance |  | 0 | $ 3 |  |  |
Disposal Group, Including Discontinued Operation, Goodwill |  | $ 3 |  |  |  |

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