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Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2024
Regulatory Assets and Liabilities Disclosure [Abstract] |
Schedule of Regulatory Assets | SCE's regulatory assets included on the consolidated balance sheets are:
| December 31,
(in millions) | 2024 |  | 2023
Current: |  |  |
Regulatory balancing and memorandum accounts | $ | 2,723 |  |  | $ | 2,502 |
Other | 25 |  |  | 22 |
Total current | 2,748 |  |  | 2,524 |
Long-term: |  |  |
Deferred income taxes | 5,982 |  |  | 5,533 |
Unamortized investments, net of accumulated amortization | 115 |  |  | 110 |
Unamortized losses on reacquired debt | 88 |  |  | 99 |
Regulatory balancing and memorandum accounts | 867 |  |  | 1,257 |
Environmental remediation | 222 |  |  | 226 |
Recovery assets | 1,512 |  |  | 1,558 |
Other | 100 |  |  | 114 |
Total long-term | 8,886 |  |  | 8,897 |
Total regulatory assets | $ | 11,634 |  |  | $ | 11,421 |
Schedule of Regulatory Liabilities | SCE's regulatory liabilities included on the consolidated balance sheets are:
| December 31,
(in millions) | 2024 |  | 2023
Current: |  |  |
Regulatory balancing and memorandum accounts | $ | 1,144 |  |  | $ | 704 |
Energy derivatives | 165 |  |  | 16 |
Other | 38 |  |  | 43 |
Total current | 1,347 |  |  | 763 |
Long-term: |  |  |
Costs of removal | 2,520 |  |  | 2,635 |
Deferred income taxes | 2,163 |  |  | 2,211 |
Recoveries in excess of ARO liabilities | 1,748 |  |  | 1,498 |
Regulatory balancing and memorandum accounts | 2,023 |  |  | 1,395 |
Pension and other postretirement benefits | 1,690 |  |  | 1,664 |
Other | 15 |  |  | 17 |
Total long-term | 10,159 |  |  | 9,420 |
Total regulatory liabilities | $ | 11,506 |  |  | $ | 10,183 |
Schedule of Regulatory Balancing Accounts | The following table summarizes the significant components of regulatory balancing and memorandum accounts included in the above tables of regulatory assets and liabilities:
| December 31, |  |  |  |
(in millions) | 2024 |  | 2023 |  |  |  |
Asset (liability) |  |  |  |  |  |  |
Energy procurement related costs | $ | (97) |  |  | $ | 397 |  |  |  |  |
Public purpose and energy efficiency | (1,708) |  |  | (1,736) |  |  |  |  |
GRC related balancing accounts 1 | 976 |  |  | 1,361 |  |  |  |  |
FERC related balancing accounts | 125 |  |  | (211) |  |  |  |  |
Wildfire risk mitigation and insurance 2 | 741 |  |  | 1,169 |  |  |  |  |
Wildfire and drought restoration 3 | 238 |  |  | 417 |  |  |  |  |
Tax accounting memorandum account | (40) |  |  | 108 |  |  |  |  |
Other | 188 |  |  | 155 |  |  |  |  |
Assets, net of liabilities | $ | 423 |  |  | $ | 1,660 |  |  |  |  |
1 The GRC related balancing accounts primarily consist of the base revenue requirement balancing account ("BRRBA"), the vegetation management balancing account ("VMBA"), the Wildfire Risk Mitigation balancing account ("WRMBA") and the risk management balancing account ("RMBA"). The 2021 GRC decision approved the establishment of the VMBA to track vegetation management expenses up to 115% of amounts authorized, the WRMBA to track the costs of SCE's Wildfire Covered Conductor Program up to 110% of amounts authorized and the RMBA to track the authorized costs of wildfire insurance. If spending is less than authorized, SCE will refund those amounts to customers. If spending is within the specified threshold, if any, for each balancing account, SCE will recover those costs from customers. Amounts above the specified threshold, or above amounts authorized if a higher threshold was not established, for each balancing account may be eligible for deferral to wildfire risk mitigation and insurance accounts. 2 The wildfire risk mitigation and insurance regulatory assets represent wildfire-related costs that are probable of future recovery from customers, subject to a reasonableness review. The Fire Hazard Prevention Memorandum Account was used to track costs related to fire safety and to implement fire prevention corrective action measures in extreme and very high fire threat areas. The Wildfire Expense Memorandum Account ("WEMA") is used to track incremental wildfire insurance costs and uninsured wildfire-related financing, legal and claims costs related to the Other Wildfire Events that SCE believes are probable of recovery. See Note 12 for further details. The Wildfire Mitigation Plan Memorandum Account is used to track costs incurred to implement SCE's wildfire mitigation plan that are not currently reflected in SCE's revenue requirements. The Fire Risk Mitigation Memorandum Account is used to track costs related to the reduction of fire risk that are incremental to costs approved for recovery in SCE's GRCs that are not tracked in any other wildfire-related memorandum account. The balance also includes vegetation management spending in excess of the 115% threshold for the VMBA described above. 3 The wildfire and drought restoration regulatory assets represent restoration costs that are recorded in a Catastrophic Event Memorandum Account.

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- Definition Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478574/980-715-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-2 + Details
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- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477571/980-405-25-1 + Details
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