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Regulatory Assets and Liabilities (Tables) - Southern California Edison | 3 Months Ended
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Mar. 31, 2020
Regulatory Assets [Line Items] |
Regulatory Assets Included on the Consolidated Balance Sheets | SCE's regulatory assets included on the consolidated balance sheets are:
(in millions) | March 31, 2020 |  | December 31, 2019
Current: |  |  |
Regulatory balancing and memorandum accounts | $ | 993 |  |  | $ | 798 |
Power contracts | 210 |  |  | 189 |
Other | 22 |  |  | 22 |
Total current | 1,225 |  |  | 1,009 |
Long-term: |  |  |
Deferred income taxes, net of liabilities | 4,145 |  |  | 4,026 |
Pensions and other postretirement benefits | 85 |  |  | 87 |
Power contracts | 387 |  |  | 434 |
Unamortized investments, net of accumulated amortization | 118 |  |  | 119 |
Unamortized loss on reacquired debt | 139 |  |  | 142 |
Regulatory balancing and memorandum accounts | 1,129 |  |  | 981 |
Environmental remediation | 235 |  |  | 237 |
Other | 56 |  |  | 62 |
Total long-term | 6,294 |  |  | 6,088 |
Total regulatory assets | $ | 7,519 |  |  | $ | 7,097 |
Regulatory Liabilities Included on the Consolidated Balance Sheets | SCE's regulatory liabilities included on the consolidated balance sheets are:
(in millions) | March 31, 2020 |  | December 31, 2019
Current: |  |  |
Regulatory balancing and memorandum accounts | $ | 749 |  |  | $ | 883 |
Energy derivatives | 3 |  |  | 80 |
Other | 12 |  |  | 9 |
Total current | 764 |  |  | 972 |
Long-term: |  |  |
Cost of removal | 2,670 |  |  | 2,674 |
Re-measurement of deferred taxes | 2,388 |  |  | 2,424 |
Recoveries in excess of ARO liabilities 1 | 1,245 |  |  | 1,569 |
Regulatory balancing and memorandum accounts | 1,356 |  |  | 1,261 |
Other postretirement benefits | 420 |  |  | 416 |
Other | 34 |  |  | 41 |
Total long-term | 8,113 |  |  | 8,385 |
Total regulatory liabilities | $ | 8,877 |  |  | $ | 9,357 |
1 Represents the cumulative differences between ARO expenses and amounts collected in rates primarily for the decommissioning of SCE's nuclear generation facilities. Decommissioning costs recovered through rates are primarily placed in nuclear decommissioning trusts. This regulatory liability also represents the deferral of realized and unrealized gains and losses on the nuclear decommissioning trust investments. See Note 10 for further discussion.
Schedule of Net Regulatory Balancing and Memorandum Accounts | The following table summarizes the significant components of regulatory balancing and memorandum accounts included in the above tables of regulatory assets and liabilities:
(in millions) | March 31, 2020 |  | December 31, 2019
Asset (liability) |  |  |
Energy resource recovery account | $ | (120 | ) |  | $ | (23 | )
Portfolio allocation balancing account | 599 |  |  | 537 |
New system generation balancing account | 75 |  |  | 85 |
Public purpose programs and energy efficiency programs | (1,330 | ) |  | (1,235 | )
Tax accounting memorandum account and pole loading balancing account | (7 | ) |  | 17 |
Base revenue requirement balancing account | 101 |  |  | (328 | )
DOE litigation memorandum account | (35 | ) |  | (35 | )
Greenhouse gas auction revenue and low carbon fuel standard revenue | (234 | ) |  | (196 | )
FERC balancing accounts | (58 | ) |  | (127 | )
Wildfire-related memorandum accounts 1 | 947 |  |  | 868 |
Other | 79 |  |  | 72 |
Asset (liability) | $ | 17 |  |  | $ | (365 | )
1 The wildfire-related memorandum accounts 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 ("FHPMA") is 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 Catastrophic Event Memorandum Account ("CEMA") is used to track costs related to restoring service and damage repair, upon declaration of disasters by state or federal authorities. The Wildfire Expense Memorandum Account ("WEMA") is used to track incremental wildfire insurance costs and uninsured wildfire-related financing, legal and claims costs. During 2019, the CPUC approved a Wildfire Mitigation Plan memorandum account to track costs incurred to implement SCE's Wildfire Mitigation Plan that are not currently reflected in SCE's revenue requirements, a Grid Safety and Resiliency Program Memorandum Account ("GSRPMA") to track the costs of SCE's GS&RP that are incremental to costs approved for recovery in SCE's 2018 GRC and a fire risk mitigation memorandum account to track costs related to the reduction of fire risk that are incremental to the amount in SCE's any other revenue requirement.

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