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Balance Sheet Components Electric Utility Plant, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Property, Plant and Equipment [Line Items] |  |  |  |  |
Electric utility plant | $ 15,202 |  | $ 15,202 |  | $ 14,863
Construction work-in-progress | 718 |  | 718 |  | 567
Total cost | 15,920 |  | 15,920 |  | 15,430
Less: accumulated depreciation and amortization | (5,275) |  | (5,275) |  | (5,085)
Electric utility plant, net | 10,645 |  | 10,645 |  | $ 10,345
Amortization of Intangible Assets | $ 19 | $ 18 | $ 38 | $ 36 |

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