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Income Taxes - Effective Tax Rate (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Line Items] |  |  |
Income from operations before income taxes | $ 1,563 | $ 1,515 | $ 662
Provision for income tax at federal statutory rate of 21% | $ 328 | $ 318 | $ 139
Statutory tax rate (as a percent) | 21.00% | 21.00% | 21.00%
(Decrease) increase in income tax from: |  |  |
State tax, net of federal income tax effect | $ (24) | $ 3 | $ (70)
Property-related | (279) | (205) | (219)
Corporate-owned life insurance cash surrender value | (9) | (8) | (9)
Other | 1 | 0 | (3)
Total | $ 17 | $ 108 | $ (162)
Effective tax rate | 1.10% | 7.10% | (24.50%)
SCE |  |  |
Income Tax Disclosure [Line Items] |  |  |
Income from operations before income taxes | $ 1,914 | $ 1,781 | $ 845
Provision for income tax at federal statutory rate of 21% | $ 402 | $ 374 | $ 177
Statutory tax rate (as a percent) | 21.00% | 21.00% | 21.00%
(Decrease) increase in income tax from: |  |  |
State tax, net of federal income tax effect | $ 0 | $ 23 | $ (57)
Property-related | (279) | (205) | (219)
Corporate-owned life insurance cash surrender value | (9) | (8) | (9)
Other | 6 | 0 | (1)
Total | $ 120 | $ 184 | $ (109)
Effective tax rate | 6.30% | 10.30% | (12.90%)

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