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Regulatory Assets and Liabilities (Tables) - Southern California Edison | 6 Months Ended
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Jun. 30, 2018
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) | June 30, 2018 |  | December 31, 2017
Current: |  |  |
Regulatory balancing accounts | $ | 642 |  |  | $ | 484 |
Power contracts and energy derivatives | 203 |  |  | 203 |
Other | 15 |  |  | 16 |
Total current | 860 |  |  | 703 |
Long-term: |  |  |
Deferred income taxes, net of liabilities | 3,306 |  |  | 3,143 |
Pensions and other postretirement benefits | 265 |  |  | 271 |
Power contracts and energy derivatives | 741 |  |  | 799 |
Unamortized investments, net of accumulated amortization | 117 |  |  | 123 |
San Onofre 1 | 72 |  |  | 72 |
Unamortized loss on reacquired debt | 160 |  |  | 168 |
Regulatory balancing accounts | 175 |  |  | 143 |
Environmental Remediation | 137 |  |  | 144 |
Other | 49 |  |  | 51 |
Total long-term | 5,022 |  |  | 4,914 |
Total regulatory assets | $ | 5,882 |  |  | $ | 5,617 |
1 | In accordance with the Revised San Onofre Settlement Agreement, SCE wrote down the San Onofre regulatory asset. SCE has requested to apply $72 million of the U.S. Department of Energy ("DOE") proceeds, currently reflected as a regulatory liability in the DOE litigation memorandum account, against the remaining San Onofre regulatory asset. See Note 12 for further information.
Regulatory Liabilities Included on the Consolidated Balance Sheets | SCE's regulatory liabilities included on the consolidated balance sheets are:
(in millions) | June 30, 2018 |  | December 31, 2017
Current: |  |  |
Regulatory balancing accounts | $ | 1,004 |  |  | $ | 1,009 |
Energy derivatives | 50 |  |  | 74 |
San Onofre 1 | 96 |  |  | 5 |
Other 2 | 191 |  |  | 33 |
Total current | 1,341 |  |  | 1,121 |
Long-term: |  |  |
Costs of removal | 2,804 |  |  | 2,741 |
Re-measurement of deferred taxes | 2,815 |  |  | 2,892 |
Recoveries in excess of ARO liabilities 3 | 1,438 |  |  | 1,575 |
Regulatory balancing accounts | 1,539 |  |  | 1,316 |
Other postretirement benefits | 26 |  |  | 26 |
Other | 37 |  |  | 64 |
Total long-term | 8,659 |  |  | 8,614 |
Total regulatory liabilities | $ | 10,000 |  |  | $ | 9,735 |
1 | During the six months ended June 30, 2018, SCE recorded San Onofre revenue based on the Prior San Onofre Settlement Agreement. As a result of the Revised San Onofre Settlement Agreement, SCE recorded a regulatory liability pending the CPUC approval of the agreement. See Note 12 for additional information.
2 | During the six months ended June 30, 2018, SCE recorded CPUC revenue based on the 2017 authorized revenue requirements adjusted for the July 2017 cost of capital decision and Tax Reform pending the outcome of the 2018 GRC. SCE recorded a regulatory liability primarily associated with these adjustments.
3 | 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 Accounts | The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities:
(in millions) | June 30, 2018 |  | December 31, 2017
Asset (liability) |  |  |
Energy resource recovery account | $ | 452 |  |  | $ | 464 |
New system generation balancing account | (190 | ) |  | (197 | )
Public purpose programs and energy efficiency programs | (1,270 | ) |  | (1,145 | )
Tax accounting memorandum account and pole loading balancing account | 4 |  |  | (259 | )
Base revenue requirement balancing account | (500 | ) |  | (200 | )
DOE litigation memorandum account | (191 | ) |  | (156 | )
Greenhouse gas auction revenue | 140 |  |  | (22 | )
FERC balancing accounts | (220 | ) |  | (205 | )
Catastrophic event memorandum account | 109 |  |  | 102 |
Other | (60 | ) |  | (80 | )
Liability | $ | (1,726 | ) |  | $ | (1,698 | )

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