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Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2016
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets Included on the Consolidated Balance Sheets | SCE's regulatory assets included on the consolidated balance sheets are:
| December 31,
(in millions) | 2016 |  | 2015
Current: |  |  |
Regulatory balancing accounts | $ | 135 |  |  | $ | 382 |
Energy derivatives | 150 |  |  | 159 |
Unamortized investments, net | 49 |  |  | — |
Other | 16 |  |  | 19 |
Total current | 350 |  |  | 560 |
Long-term: |  |  |
Deferred income taxes, net | 4,478 |  |  | 3,757 |
Pensions and other postretirement benefits | 710 |  |  | 849 |
Energy derivatives | 947 |  |  | 1,027 |
Unamortized investments, net | 80 |  |  | 182 |
San Onofre | 857 |  |  | 1,043 |
Unamortized loss on reacquired debt | 184 |  |  | 201 |
Regulatory balancing accounts | 66 |  |  | 36 |
Environmental remediation | 126 |  |  | 129 |
Other | 7 |  |  | 288 |
Total long-term | 7,455 |  |  | 7,512 |
Total regulatory assets | $ | 7,805 |  |  | $ | 8,072 |
Regulatory Liabilities Included on the Consolidated Balance Sheets | SCE's regulatory liabilities included on the consolidated balance sheets are:
| December 31,
(in millions) | 2016 |  | 2015
Current: |  |  |
Regulatory balancing accounts | $ | 736 |  |  | $ | 1,106 |
Other | 20 |  |  | 22 |
Total current | 756 |  |  | 1,128 |
Long-term: |  |  |
Costs of removal | 2,847 |  |  | 2,781 |
Recoveries in excess of ARO liabilities | 1,639 |  |  | 1,502 |
Regulatory balancing accounts | 1,180 |  |  | 1,314 |
Other | 60 |  |  | 79 |
Total long-term | 5,726 |  |  | 5,676 |
Total regulatory liabilities | $ | 6,482 |  |  | $ | 6,804 |
Schedule of Regulatory Balancing Accounts | The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities:
| December 31,
(in millions) | 2016 |  | 2015
Asset (liability) |  |  |
Energy resource recovery account | $ | (20 | ) |  | $ | (439 | )
New system generation balancing account | (6 | ) |  | (171 | )
Public purpose programs and energy efficiency programs | (992 | ) |  | (683 | )
Base revenue requirement balancing account | (426 | ) |  | (319 | )
Tax accounting memorandum account and pole loading | (142 | ) |  | (248 | )
DOE litigation memorandum account 1 | (122 | ) |  | — |
Greenhouse gas auction revenue | 31 |  |  | (75 | )
FERC balancing accounts | (69 | ) |  | 74 |
Other | 31 |  |  | (141 | )
Liability | $ | (1,715 | ) |  | $ | (2,002 | )
1 Represents proceeds from the Department of Energy ("DOE") 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 Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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