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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2024
Inventory Disclosure [Abstract] |
Schedule of Utility Inventory |
($ millions) | 2024 |  |  | 2023 |
Materials and supplies | 548 |  |  | 431 |
Gas and fuel in storage | 65 |  |  | 96 |
Coal inventory | 72 |  |  | 39 |
| 685 |  |  | 566 |

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- Definition Tabular disclosure of all information related to inventories for utilities. + References No definition available. + Details
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