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Regulatory Assets and Liabilities | 6 Months Ended
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Jun. 30, 2013
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets and Liabilities | Regulatory Assets and Liabilities As a result of the permanent retirement of San Onofre, SCE has reclassified at May 31, 2013, $1,521 million of its investment including property, plant and equipment, nuclear fuel and inventory, and other assets to a regulatory asset. The San Onofre regulatory asset will increase or decrease in subsequent periods based on the difference between authorized revenue related to San Onofre and actual cost of service that is expected to be recovered. In June 2013, SCE cost of service, including severance costs of $56 million, exceeded authorized revenue by $32 million resulting in an increase in the San Onofre regulatory asset. As of June 30, 2013, SCE also recorded a regulatory asset for recovery of $33 million of estimated costs associated with the cancellation and management of future deliveries of nuclear fuel. See Note 12 for further information. Regulatory Assets Regulatory assets included on the consolidated balance sheets are:
(in millions) | June 30, 2013 |  | December 31, 2012
Current: |  |  |
Regulatory balancing accounts | $ | 709 |  |  | $ | 502 |
Energy derivatives | 94 |  |  | 70 |
Total Current | 803 |  |  | 572 |
Long-term: |  |  |
Deferred income taxes, net | 2,759 |  |  | 2,663 |
Pensions and other postretirement benefits | 1,119 |  |  | 1,550 |
Energy derivatives | 990 |  |  | 900 |
Unamortized investments, net | 363 |  |  | 507 |
San Onofre | 1,584 |  |  | — |
Unamortized loss on reacquired debt | 218 |  |  | 228 |
Nuclear-related investment, net | 35 |  |  | 141 |
Regulatory balancing accounts | 78 |  |  | 73 |
Other | 348 |  |  | 360 |
Total Long-term | 7,494 |  |  | 6,422 |
Total Regulatory Assets | $ | 8,297 |  |  | $ | 6,994 |
Regulatory Liabilities Regulatory liabilities included on the consolidated balance sheets are:
(in millions) | June 30, 2013 |  | December 31, 2012
Current: |  |  |
Regulatory balancing accounts | $ | 443 |  |  | $ | 484 |
Other | 50 |  |  | 52 |
Total Current | 493 |  |  | 536 |
Long-term: |  |  |
Costs of removal | 2,791 |  |  | 2,731 |
Asset Retirement Obligations | 853 |  |  | 1,385 |
Regulatory balancing accounts | 1,183 |  |  | 1,091 |
Other | 9 |  |  | 7 |
Total Long-term | 4,836 |  |  | 5,214 |
Total Regulatory Liabilities | $ | 5,329 |  |  | $ | 5,750 |
The regulatory liability related to asset retirement obligations represents the nuclear decommissioning trust assets in excess of the related asset retirement obligations. The decrease in this regulatory liability during June 2013 results from a revision to the asset retirement obligations of San Onofre. For further information, see Note 1.

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- Definition The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit. + References No definition available. + Details
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