Selected Balance Sheet Data, Property, Plant and Equipment, Net (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 | $ 4,001 | $ 3,790 | ||
| Plant to be retired | [1] | 1,525 | 1,595 | |
| Construction work in progress | 11,943 | 8,085 | ||
| Total property, plant and equipment | 93,931 | 85,879 | ||
| Less accumulated depreciation | (22,199) | (20,710) | ||
| Nuclear fuel | 3,747 | 3,678 | ||
| Less accumulated amortization | (3,298) | (3,208) | ||
| Property, plant and equipment, net | 72,181 | 65,639 | ||
| Electric plant | ||||
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Plant | 65,455 | 61,892 | ||
| Natural gas plant | ||||
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Plant | $ 11,007 | $ 10,517 | ||
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