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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Taxes |
Components of Income Tax Expense (Benefit) | The components of income tax expense (benefit) by location of taxing jurisdiction are:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | Years ended December 31,
(in millions) |  | 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021
Current: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Federal | ​ | $ | — | ​ | $ | 2 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
State | ​ |  | — | ​ |  | 13 | ​ |  | (179) | ​ |  | 5 | ​ |  | 2 | ​ |  | (45)
​ | ​ |  | — | ​ |  | 15 | ​ |  | (179) | ​ |  | 5 | ​ |  | 2 | ​ |  | (45)
Deferred: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Federal | ​ |  | 101 | ​ |  | (103) | ​ |  | 83 | ​ |  | 149 | ​ |  | (44) | ​ |  | 83
State | ​ |  | 7 | ​ |  | (74) | ​ |  | (40) | ​ |  | 30 | ​ |  | (67) | ​ |  | (21)
​ | ​ |  | 108 | ​ |  | (177) | ​ |  | 43 | ​ |  | 179 | ​ |  | (111) | ​ |  | 62
Total | ​ | $ | 108 | ​ | $ | (162) | ​ | $ | (136) | ​ | $ | 184 | ​ | $ | (109) | ​ | $ | 17
Components of Net Accumulated Deferred Income Tax Liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | December 31,
(in millions) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Deferred tax assets: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Property | ​ | $ | 894 | ​ | $ | 859 | ​ | $ | 877 | ​ | $ | 840
Wildfire-related1 | ​ |  | 356 | ​ |  | 458 | ​ |  | 354 | ​ |  | 457
Nuclear decommissioning trust assets in excess of nuclear ARO liability | ​ |  | 380 | ​ |  | 321 | ​ |  | 380 | ​ |  | 321
Loss and credit carryforwards2 | ​ |  | 3,486 | ​ |  | 3,479 | ​ |  | 2,103 | ​ |  | 2,157
Regulatory balances | ​ |  | 626 | ​ |  | 641 | ​ |  | 626 | ​ |  | 641
Pension and postretirement benefits other than pensions, net | ​ |  | 127 | ​ |  | 130 | ​ |  | 25 | ​ |  | 26
Leases | ​ | ​ | 345 | ​ | ​ | 406 | ​ | ​ | 345 | ​ | ​ | 406
Other | ​ |  | 159 | ​ |  | 162 | ​ |  | 147 | ​ |  | 135
Sub-total | ​ |  | 6,373 | ​ |  | 6,456 | ​ |  | 4,857 | ​ |  | 4,983
Less: valuation allowance3 | ​ |  | 17 | ​ |  | 39 | ​ |  | — | ​ |  | —
Total | ​ |  | 6,356 | ​ |  | 6,417 | ​ |  | 4,857 | ​ |  | 4,983
Deferred tax liabilities: | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ |  | ​
Property | ​ |  | 10,627 | ​ |  | 10,091 | ​ |  | 10,611 | ​ |  | 10,078
Regulatory balances | ​ |  | 1,450 | ​ |  | 1,462 | ​ |  | 1,450 | ​ |  | 1,462
Nuclear decommissioning trust assets | ​ |  | 380 | ​ |  | 321 | ​ |  | 380 | ​ |  | 321
Leases | ​ | ​ | 345 | ​ | ​ | 406 | ​ | ​ | 345 | ​ | ​ | 406
Other | ​ |  | 187 | ​ |  | 225 | ​ |  | 158 | ​ |  | 200
Total | ​ |  | 12,989 | ​ |  | 12,505 | ​ |  | 12,944 | ​ |  | 12,467
Accumulated deferred income tax liability, net4 | ​ | $ | 6,633 | ​ | $ | 6,088 | ​ | $ | 8,087 | ​ | $ | 7,484
1 | Relates to estimated losses accrual for wildfire-related claims, net of expected recoveries from insurance and FERC customers, and contributions to the Wildfire Insurance Fund. For further information, see Note 12 and Note 1.
2 | As of December 31, 2023, unrecognized tax benefits of $363 million and $299 million for Edison International and SCE, respectively, are presented net against the deferred tax asset for the loss and tax credit carryforwards. As of December 31, 2022, the unrecognized tax benefits netted against deferred tax assets and tax credit carryforwards were $310 million and $254 million for Edison International and SCE, respectively.
3 | As of December 31, 2023, Edison International has recorded $17 million valuation allowance on deferred tax assets. The $17 million valuation allowance is related to non-California state net operating loss carryforwards which are expected to expire before being utilized. As of December 31, 2022, the valuation allowance on deferred tax assets which are estimated to expire before being utilized for Edison International includes $35 million for non-California state net operating loss carryforwards, $4 million for California capital losses generated from sale of SoCore Energy in 2018.
4 | Included in "Deferred income taxes and credits" on the consolidated balance sheets.
Summary of Net Operating Loss and Tax Credit Carryforwards | The amounts of net operating loss and tax credit carryforwards (after-tax) are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | December 31, 2023
​ | ​ | Loss | ​ | Credit | ​ | Loss | ​ | Credit
(in millions) |  | Carryforwards |  | Carryforwards |  | Carryforwards |  | Carryforwards
Expire in 2024 | ​ | $ | 7 | ​ | $ | — | ​ | $ | 7 | ​ | $ | —
Expire between 2025 to 2028 | ​ |  | 22 | ​ |  | — | ​ |  | 22 | ​ |  | —
Expire between 2029 to 2043 | ​ |  | 1,714 | ​ |  | 471 | ​ |  | 862 | ​ |  | 63
No expiration date1 | ​ |  | 1,625 | ​ |  | 10 | ​ |  | 1,448 | ​ |  | —
Total | ​ | $ | 3,368 | ​ | $ | 481 | ​ | $ | 2,339 | ​ | $ | 63
1 | Under the Tax Cut and Jobs Act signed into law on December 22, 2017 ("Tax Reform"), net operating losses generated after December 31, 2017 can carryforward indefinitely.
Summary of reconciliation of income tax expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE | ​
​ | ​ | Years ended December 31, | ​
(in millions) | ​ | 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021 |
Income from operations before income taxes | ​ | $ | 1,515 | ​ | $ | 662 | ​ | $ | 789 | ​ | $ | 1,781 | ​ | $ | 845 | ​ | $ | 952 | ​
Provision for income tax at federal statutory rate of 21% | ​ |  | 318 | ​ |  | 139 | ​ |  | 166 | ​ |  | 374 | ​ |  | 177 | ​ |  | 200 | ​
(Decrease) increase in income tax from: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
State tax, net of federal income tax effect | ​ |  | 3 | ​ |  | (70) | ​ |  | (47) | ​ |  | 23 | ​ |  | (57) | ​ |  | (33) | ​
Property-related | ​ |  | (205) | ​ |  | (219) | ​ |  | (233) | ​ |  | (205) | ​ |  | (219) | ​ |  | (233) | ​
Change related to uncertain tax position1 | ​ |  | — | ​ |  | — | ​ |  | (147) | ​ |  | — | ​ |  | — | ​ |  | (37) | ​
Wildfire related charges2 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 31 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 31 | ​
Average rate assumption method ("ARAM") adjustment3 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 87 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 87 | ​
Corporate-owned life insurance cash surrender value | ​ |  | (8) | ​ |  | (9) | ​ |  | (8) | ​ |  | (8) | ​ |  | (9) | ​ |  | (8) | ​
Other | ​ |  | — | ​ |  | (3) | ​ |  | 15 | ​ |  | — | ​ |  | (1) | ​ |  | 10 | ​
Total income tax expense (benefit) | ​ | $ | 108 | ​ | $ | (162) | ​ | $ | (136) | ​ | $ | 184 | ​ | $ | (109) | ​ | $ | 17 | ​
Effective tax rate | ​ |  | 7.1 | % |  | (24.5) | % |  | (17.2) | % |  | 10.3 | % |  | (12.9) | % |  | 1.8 | %
1 | In 2021, Edison International and SCE recognized tax benefits related to a settlement with the California Franchise Tax Board ("FTB") for tax years 2007 – 2012.
2 | Relates to the non-tax deductible portions of the SED Agreement (as defined in Note 12). See Note 12 for further discussion under 2017/2018 Wildfire/Mudslide Events.
3 | In July 2021, SCE received the IRS response to its private letter ruling request, regarding the scope of the deferred tax normalization requirements and the computations required to comply with the average rate assumption method. As a result, SCE's estimate changed and a cumulative true-up of $87 million reduction in tax benefits was recorded in the third quarter of 2021, for the period of January 1, 2018 to June 30, 2021.
Reconciliation of Unrecognized Tax Benefits | The following table provides a reconciliation of unrecognized tax benefits:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
(in millions) | ​ | 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021
Balance at January 1, | ​ | $ | 646 | ​ | $ | 613 | ​ | $ | 679 | ​ | $ | 374 | ​ | $ | 340 | ​ | $ | 320
Tax positions taken during the current year: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Increases | ​ |  | 65 | ​ |  | 54 | ​ |  | 53 | ​ |  | 65 | ​ |  | 54 | ​ |  | 53
Tax positions taken during a prior year: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Increases | ​ |  | 13 | ​ |  | — | ​ |  | 3 | ​ |  | 4 | ​ |  | — | ​ |  | 1
Decreases1 | ​ |  | (294) | ​ |  | (21) | ​ |  | (118) | ​ |  | (25) | ​ |  | (20) | ​ |  | (29)
Settlements with taxing authorities2 | ​ |  | — | ​ |  | — | ​ |  | (4) | ​ |  | — | ​ |  | — | ​ |  | (5)
Balance at December 31, | ​ | $ | 430 | ​ | $ | 646 | ​ | $ | 613 | ​ | $ | 418 | ​ | $ | 374 | ​ | $ | 340
1 | The Edison International decrease in 2023 was mainly related to a write-off of a reserve for a claim related to the Edison Mission Energy bankruptcy. See the discussion in "Tax Disputes" for more information. The decrease in 2021 was related to re-measurement as a result of a settlement with the FTB for tax years 2007 – 2012.
2 | In 2021, Edison International reached a settlement with the FTB for tax years 2007 – 2012.
Schedule of Interest and Penalties Related to Income Tax Liabilities | The total amount of accrued interest and penalties related to income tax liabilities are:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | December 31,
(in millions) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Accrued interest and penalties | ​ | $ | — | ​ | $ | — | ​ | $ | 28 | ​ | $ | 23
​ The net after-tax interest and penalties recognized in income tax (benefit) expense are:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Edison International | ​ | SCE
​ | ​ | Years ended December 31,
(in millions) |  | 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021
Net after-tax interest and penalties tax (benefit) expense | ​ | $ | — | ​ | $ | — | ​ | $ | (41) | ​ | $ | 4 | ​ | $ | 2 | ​ | $ | (2)
​

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