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Regulatory Assets and Liabilities | 9 Months Ended
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Sep. 30, 2016
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets and Liabilities | Regulatory Assets and Liabilities Regulatory Assets SCE's regulatory assets included on the consolidated balance sheets are:
(in millions) | September 30, 2016 |  | December 31, 2015
Current: |  |  |
Regulatory balancing accounts | $ | 135 |  |  | $ | 382 |
Energy derivatives | 167 |  |  | 159 |
Other | 19 |  |  | 19 |
Total current | 321 |  |  | 560 |
Long-term: |  |  |
Deferred income taxes, net | 4,346 |  |  | 3,757 |
Pensions and other postretirement benefits | 829 |  |  | 849 |
Energy derivatives | 1,010 |  |  | 1,027 |
Unamortized investments, net | 143 |  |  | 182 |
San Onofre | 899 |  |  | 1,043 |
Unamortized loss on reacquired debt | 189 |  |  | 201 |
Regulatory balancing accounts | 36 |  |  | 36 |
Environmental remediation | 128 |  |  | 129 |
Other | 264 |  |  | 288 |
Total long-term | 7,844 |  |  | 7,512 |
Total regulatory assets | $ | 8,165 |  |  | $ | 8,072 |
Regulatory Liabilities SCE's regulatory liabilities included on the consolidated balance sheets are:
(in millions) | September 30, 2016 |  | December 31, 2015
Current: |  |  |
Regulatory balancing accounts | $ | 999 |  |  | $ | 1,106 |
Other | 31 |  |  | 22 |
Total current | 1,030 |  |  | 1,128 |
Long-term: |  |  |
Costs of removal | 2,842 |  |  | 2,781 |
Recoveries in excess of ARO liabilities1 | 1,769 |  |  | 1,502 |
Regulatory balancing accounts | 1,348 |  |  | 1,314 |
Other | 61 |  |  | 79 |
Total long-term | 6,020 |  |  | 5,676 |
Total regulatory liabilities | $ | 7,050 |  |  | $ | 6,804 |
1 | Represents the cumulative differences between ARO expenses and amounts collected in rates primarily for the decommissioning of the 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 9.
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) | September 30, 2016 |  | December 31, 2015
Asset (liability) |  |  |
Energy resource recovery account | $ | (208 | ) |  | $ | (439 | )
New system generation balancing account | (7 | ) |  | (171 | )
Public purpose programs and energy efficiency programs | (983 | ) |  | (683 | )
Tax accounting memorandum account and pole loading balancing account | (105 | ) |  | (248 | )
Base rate recovery balancing account | (509 | ) |  | (319 | )
Department of Energy litigation memorandum account1 | (122 | ) |  | — |
Greenhouse gas auction revenue | (77 | ) |  | (75 | )
FERC balancing accounts | (87 | ) |  | 74 |
Other | (78 | ) |  | (141 | )
Liability | $ | (2,176 | ) |  | $ | (2,002 | )
1 | Represents proceeds from the Department of Energy resulting from its failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. Damages recovered are subject to CPUC review as to how these amounts would be distributed among customers, shareholders, or to offset fuel decommissioning or storage costs. See Note 11 for further discussion.

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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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