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Regulatory Assets and Liabilities | 3 Months Ended
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Mar. 31, 2017
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) | March 31, 2017 |  | December 31, 2016
Current: |  |  |
Regulatory balancing accounts | $ | 139 |  |  | $ | 135 |
Energy derivatives | 186 |  |  | 150 |
Unamortized investments, net of accumulated amortization | 37 |  |  | 49 |
Other | 32 |  |  | 16 |
Total current | 394 |  |  | 350 |
Long-term: |  |  |
Deferred income taxes, net of liabilities | 4,689 |  |  | 4,478 |
Pensions and other postretirement benefits | 711 |  |  | 710 |
Energy derivatives | 996 |  |  | 947 |
Unamortized investments, net of accumulated amortization | 79 |  |  | 80 |
San Onofre | 815 |  |  | 857 |
Unamortized loss on reacquired debt | 180 |  |  | 184 |
Regulatory balancing accounts | 68 |  |  | 66 |
Environmental remediation | 125 |  |  | 126 |
Other | 11 |  |  | 7 |
Total long-term | 7,674 |  |  | 7,455 |
Total regulatory assets | $ | 8,068 |  |  | $ | 7,805 |
Regulatory Liabilities SCE's regulatory liabilities included on the consolidated balance sheets are:
(in millions) | March 31, 2017 |  | December 31, 2016
Current: |  |  |
Regulatory balancing accounts | $ | 740 |  |  | $ | 736 |
San Onofre MHI arbitration award 1 | 47 |  |  | — |
Other | 17 |  |  | 20 |
Total current | 804 |  |  | 756 |
Long-term: |  |  |
Costs of removal | 2,838 |  |  | 2,847 |
Recoveries in excess of ARO liabilities 2 | 1,735 |  |  | 1,639 |
Regulatory balancing accounts | 1,278 |  |  | 1,180 |
Other | 59 |  |  | 60 |
Total long-term | 5,910 |  |  | 5,726 |
Total regulatory liabilities | $ | 6,714 |  |  | $ | 6,482 |
1 | Represents SCE's net recovery from claims against MHI. See Note 11 for further discussion.
2 | 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 9 for further discussion.
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) | March 31, 2017 |  | December 31, 2016
Asset (liability) |  |  |
Energy resource recovery account | $ | 30 |  |  | $ | (20 | )
New system generation balancing account | (97 | ) |  | (6 | )
Public purpose programs and energy efficiency programs | (1,056 | ) |  | (992 | )
Tax accounting memorandum account and pole loading balancing account | (136 | ) |  | (142 | )
Base rate recovery balancing account | (360 | ) |  | (426 | )
Department of Energy litigation memorandum account | (123 | ) |  | (122 | )
Greenhouse gas auction revenue | (3 | ) |  | 31 |
FERC balancing accounts | (93 | ) |  | (69 | )
Other | 27 |  |  | 31 |
Liability | $ | (1,811 | ) |  | $ | (1,715 | )

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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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