Selected Balance Sheet Data Balance Sheet Related Disclosures, Property, Plant and Equipment (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
||
|---|---|---|---|---|
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Common and other property | $ 1,649 | $ 1,616 | ||
| Plant to be retired | [1] | 975 | 1,057 | |
| Construction work in progress | 3,192 | 2,274 | ||
| Total property, plant and equipment | 31,851 | 29,794 | ||
| Less accumulated depreciation | (6,657) | (6,453) | ||
| Property, plant and equipment, net | 25,194 | 23,341 | ||
| Electric plant | ||||
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Plant | 19,069 | 18,033 | ||
| Natural gas plant | ||||
| Public Utility, Property, Plant and Equipment [Line Items] | ||||
| Plant | $ 6,966 | $ 6,814 | ||
| ||||