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Summary of Significant Accounting Policies (Revenue) (Details) - SCE - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Public Utilities, General Disclosures [Line Items] |  |  |  |
Franchise fees billed to customers |  | $ 147 | $ 131 | $ 122
2021 General Rate Case |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Approved rate amount | $ 6,900 |  |  |
Approved regulatory increase (decrease) | $ 1,000 |  |  |

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- Definition Amount of public utility's approved rate increase (decrease) by regulatory agency. + References No definition available. + Details
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- Details
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