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Regulatory Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | $ 964 | $ 603
Long-term regulatory liabilities | 8,211 | 8,981
SCE |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 964 | 603
Long-term regulatory liabilities | 8,211 | 8,981
Total regulatory liabilities | 9,175 | 9,584
SCE | Revenue subject to refund |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 584 | 553
Long-term regulatory liabilities | 1,116 | 648
SCE | Energy derivatives |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 338 | 25
SCE | Costs of removal |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 2,589 | 2,552
SCE | Re-measurement of deferred taxes |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 2,250 | 2,315
SCE | Recoveries in excess of ARO liabilities |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 1,231 | 2,155
SCE | Pension and other postretirement benefits |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 1,007 | 1,281
SCE | Other regulatory assets or liabilities |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 42 | 25
Long-term regulatory liabilities | $ 18 | $ 30

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