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Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2020
Income Tax Disclosure [Abstract] |
Reconciliation of Income Tax Expense | The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision:
| Three months ended September 30, |  |  |  | Nine months ended September 30, |  |
(in millions) | 2020 |  | 2019 |  | 2020 |  | 2019
Edison International: |  |  |  |  |  |  |
(Loss) income from operations before income taxes | $ | (517) |  |  | $ | 480 |  |  | $ | (36) |  |  | $ | 1,020 |
Provision for income tax at federal statutory rate of 21% | (108) |  |  | 101 |  |  | (7) |  |  | 214 |
Increase (decrease) in income tax from: |  |  |  |  |  |  |
State tax, net of federal benefit | (67) |  |  | 5 |  |  | (74) |  |  | — |
Property-related | (81) |  |  | (124) |  |  | (228) |  |  | (267) |
Change related to uncertain tax position1 | — |  |  | — |  |  | (15) |  |  | — |
Deferred tax re-measurement2 | — |  |  | — |  |  | — |  |  | (69) |
2018 GRC Decision | — |  |  | — |  |  | — |  |  | (80) |
Other | (19) |  |  | (4) |  |  | (31) |  |  | (10) |
Total income tax benefit | $ | (275) |  |  | $ | (22) |  |  | $ | (355) |  |  | $ | (212) |
Effective tax rate | (53.2) | % |  | (4.6) | % |  | (986.1) | % |  | (20.8) | %
SCE: |  |  |  |  |  |  |
(Loss) income from operations before income taxes | $ | (469) |  |  | $ | 524 |  |  | $ | 142 |  |  | $ | 1,123 |
Provision for income tax at federal statutory rate of 21% | (98) |  |  | 110 |  |  | 30 |  |  | 236 |
Increase (decrease) in income tax from: |  |  |  |  |  |  |
State tax, net of federal benefit | (61) |  |  | 8 |  |  | (62) |  |  | 6 |
Property-related | (81) |  |  | (124) |  |  | (228) |  |  | (267) |
Change related to uncertain tax positions1 | — |  |  | — |  |  | (18) |  |  | — |
Deferred tax re-measurement2 | — |  |  | — |  |  | — |  |  | (69) |
2018 GRC Decision | — |  |  | — |  |  | — |  |  | (80) |
Other | (11) |  |  | (4) |  |  | (22) |  |  | (9) |
Total income tax benefit | $ | (251) |  |  | $ | (10) |  |  | $ | (300) |  |  | $ | (183) |
Effective tax rate | (53.5) | % |  | (1.9) | % |  | (211.3) | % |  | (16.3) | %
1 Primarily relates to the re-measurement of uncertain tax positions related to the 2010 – 2012 California state tax filings currently under audit. 2 Relates to changes in the allocation of deferred tax re-measurement between customers and shareholders as a result of a CPUC resolution issued in February 2019. The resolution determined that customers are only entitled to excess deferred taxes which were included when setting rates, while other deferred tax re-measurement belongs to the shareholders.
Reconciliation of Unrecognized Tax Benefits | The following table provides a reconciliation of unrecognized tax benefits:
| Edison International |  |  | SCE |
(in millions) | 2020 | 2019 |  | 2020 | 2019
Balance at January 1, | $ | 370 |  | $ | 338 |  |  | $ | 282 |  | $ | 249 |
Tax positions taken during the current year: |  |  |  |  |
Increases | 38 |  | 32 |  |  | 39 |  | 32 |
Tax positions taken during a prior year: |  |  |  |  |
Increases1 | 273 |  | — |  |  | 4 |  | — |
Decreases | (18) |  | (11) |  |  | (21) |  | (11) |
Balance at September 30, | $ | 663 |  | $ | 359 |  |  | $ | 304 |  | $ | 270 |
1 Edison International recorded favorable tax positions for the quarter ended September 30, 2020, in connection with the Edison Mission Energy ("EME") bankruptcy that required a revaluation of the reserve for uncertain tax positions.

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