Selected Balance Sheet Data Balance Sheet Related Disclosures, Property, Plant and Equipment (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Common and other property | $ 1,763 | $ 1,704 | ||
| Plant to be retired | [1] | 889 | 929 | |
| Construction work in progress | 6,793 | 4,367 | ||
| Total property, plant and equipment | 38,838 | 34,673 | ||
| Less accumulated depreciation | (7,571) | (6,851) | ||
| Property, plant and equipment, net | 31,267 | 27,822 | ||
| Electric plant | ||||
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Plant | 21,851 | 20,451 | ||
| Natural gas plant | ||||
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Plant | $ 7,542 | $ 7,222 | ||
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