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Property, Plant and Equipment (Components of PP&E) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Electric generation, distribution assets and other | $ 26,599 | $ 25,552
Accumulated depreciation | (8,651) | (8,486)
Property, Plant and Equipment, Net | 17,948 | 17,066
Electric generation and distribution facilities |  |
Property, Plant and Equipment [Line Items] |  |
Electric generation, distribution assets and other | $ 24,135 | 22,909
Electric generation and distribution facilities | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Electric generation and distribution facilities | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 39 years |
Other buildings |  |
Property, Plant and Equipment [Line Items] |  |
Electric generation, distribution assets and other | $ 1,197 | 1,552
Other buildings | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Other buildings | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 51 years |
Furniture and Fixtures [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Electric generation, distribution assets and other | $ 348 | 356
Furniture and Fixtures [Member] | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Furniture and Fixtures [Member] | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 30 years |
Other |  |
Property, Plant and Equipment [Line Items] |  |
Electric generation, distribution assets and other | $ 919 | $ 735
Other | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 1 year |
Other | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 40 years |

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