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Regulatory Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | $ 523 | $ 603
Long-term regulatory liabilities | 8,376 | 8,981
SCE |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 523 | 603
Long-term regulatory liabilities | 8,376 | 8,981
Total regulatory liabilities | 8,899 | 9,584
SCE | Revenue subject to refund |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 506 | 553
Long-term regulatory liabilities | 822 | 648
SCE | Energy derivatives |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities |  | 25
SCE | Costs of removal |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 2,678 | 2,552
SCE | Re-measurement of deferred taxes |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 2,288 | 2,315
SCE | Recoveries in excess of ARO liabilities |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 1,275 | 2,155
SCE | Pension and other postretirement benefits |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 1,289 | 1,281
SCE | Other regulatory assets or liabilities |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 17 | 25
Long-term regulatory liabilities | $ 24 | $ 30

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- Definition The amount for the individual regulatory liability as itemized in a table of 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 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current 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 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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