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Income Taxes (NOL and Carryforwards) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Carryforwards |  |  |  |
Loss carryforwards |  | $ 3,235 |  |
Credit carryforwards |  | 554 |  |
Deferred tax expense |  | (177) | $ 43 | $ (296)
Capistrano Wind |  |  |  |
Carryforwards |  |  |  |
Deferred tax expense |  | 121 | 223 |
Increase (decrease) to previously recorded tax expense | $ (125) |  |  |
Expire in 2022 |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 10 |  |
Credit carryforwards |  | 0 |  |
Expire between 2024 to 2027 |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 26 |  |
Credit carryforwards |  | 0 |  |
Expire between 2029 to 2043 |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 1,670 |  |
Credit carryforwards |  | 544 |  |
No expiration date |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 1,529 |  |
Credit carryforwards |  | 10 |  |
SCE |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 2,351 |  |
Credit carryforwards |  | 60 |  |
Deferred tax expense |  | (111) | $ 62 | $ (263)
SCE | Expire in 2022 |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 6 |  |
Credit carryforwards |  | 0 |  |
SCE | Expire between 2024 to 2027 |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 25 |  |
Credit carryforwards |  | 0 |  |
SCE | Expire between 2029 to 2043 |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 870 |  |
Credit carryforwards |  | 60 |  |
SCE | No expiration date |  |  |  |
Carryforwards |  |  |  |
Loss carryforwards |  | 1,450 |  |
Credit carryforwards |  | $ 0 |  |

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