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Regulatory Assets and Liabilities (Balancing Accounts) (Details) - SCE - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Regulatory balancing and memorandum accounts | Significant components |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | $ 1,499 | $ 1,388
Regulatory balancing and memorandum accounts | Portfolio allocation balancing account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 437 | 497
Regulatory balancing and memorandum accounts | Base revenue requirement balancing account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 662 | 622
Regulatory balancing and memorandum accounts | FERC balancing account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 12 | 12
Regulatory balancing and memorandum accounts | Wildfire and drought restoration accounts |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 397 | 361
Regulatory balancing and memorandum accounts | Wildfire-related memorandum accounts |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 1,142 | 1,104
Regulatory balancing and memorandum accounts | COVID 19-related memorandum accounts |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 87 | 176
Regulatory balancing and memorandum accounts | Customer service re-platform memorandum account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 37 | 30
Regulatory balancing and memorandum accounts | Residential uncollectibles balancing account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 129 |
Regulatory balancing and memorandum accounts | Other |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | 48 |
Revenue subject to refund | Energy resource recovery account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | (133) | (89)
Revenue subject to refund | New system generation balancing account |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | (6) | (10)
Revenue subject to refund | Public purpose programs and energy efficiency programs |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | (1,192) | (1,130)
Revenue subject to refund | Greenhouse gas auction revenue and low carbon fuel standard revenue |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) | $ (121) | (125)
Revenue subject to refund | Other |  |
Regulatory Assets and Liabilities |  |
Net regulatory assets (liabilities) |  | $ (60)

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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- Definition The net amount of all regulatory assets less all regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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