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Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Sep. 30, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Line Items] |  |  |  |  |
Statutory tax rate (as a percent) |  |  | 21.00% | 21.00% | 21.00%
Income from operations before income taxes |  |  | $ 1,515 | $ 662 | $ 789
Provision for income tax at federal statutory rate of 21% |  |  | 318 | 139 | 166
(Decrease) increase in income tax from: |  |  |  |  |
State tax, net of federal income tax effect |  |  | 3 | (70) | (47)
Property-related |  |  | (205) | (219) | (233)
Change related to uncertain tax position |  |  |  |  | (147)
Wildfire related charges |  |  |  |  | 31
Average rate assumption method ("ARAM") adjustment |  |  |  |  | 87
Corporate-owned life insurance cash surrender value |  |  | (8) | (9) | (8)
Other |  |  |  | (3) | 15
Total income tax expense (benefit) |  |  | $ 108 | $ (162) | $ (136)
Effective tax rate |  |  | 7.10% | (24.50%) | (17.20%)
Increase (decrease) to previously recorded tax expense | $ 268 |  |  |  |
SCE |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Income from operations before income taxes |  |  | $ 1,781 | $ 845 | $ 952
Provision for income tax at federal statutory rate of 21% |  |  | 374 | 177 | 200
(Decrease) increase in income tax from: |  |  |  |  |
State tax, net of federal income tax effect |  |  | 23 | (57) | (33)
Property-related |  |  | (205) | (219) | (233)
Change related to uncertain tax position |  |  |  |  | (37)
Wildfire related charges |  |  |  |  | 31
Average rate assumption method ("ARAM") adjustment |  | $ 87 |  |  | 87
Corporate-owned life insurance cash surrender value |  |  | (8) | (9) | (8)
Other |  |  |  | (1) | 10
Total income tax expense (benefit) |  |  | $ 184 | $ (109) | $ 17
Effective tax rate |  |  | 10.30% | (12.90%) | 1.80%

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