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Summary of Significant Accounting Policies (Wildfire Insurance Fund and AB 1054) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Regulatory Assets [Line Items] |  |  |  |  |
Wildfire Insurance Fund contributions long term | $ 2,849 | $ 2,849 | $ 2,849 |  | $ 0
Wildfire Insurance Fund contributions current | 323 | 323 | 323 |  | 0
Contributions to Wildfire Insurance Fund |  |  | 2,363 | $ 0 |
Insurance fund liability included in other long-term liabilities | 782 | 782 | 782 |  |
Insurance fund liability included in accounts payable | 94 | $ 94 | 94 |  |
Amortization period |  | 10 years |  |  |
Historical term |  |  |  |  |
Regulatory Assets [Line Items] |  |  |  |  |
Historical term used in estimate |  | 5 years |  |  |
Southern California Edison |  |  |  |  |
Regulatory Assets [Line Items] |  |  |  |  |
Wildfire Insurance Fund contributions long term | 2,849 | $ 2,849 | 2,849 |  | 0
Wildfire Insurance Fund contributions current | 323 | 323 | 323 |  | $ 0
Contributions to Wildfire Insurance Fund | 2,400 | 2,400 | 2,363 | $ 0 |
Insurance fund liability included in other long-term liabilities | 782 | 782 | 782 |  |
Insurance fund liability included in accounts payable | $ 94 | $ 94 | $ 94 |  |

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- Definition Capitalized Insurance Fund Contribution, Amortization Period, Measurement Input + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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