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Commitments and Contingencies (Current Wildfire Insurance Coverage) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended | 13 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 31, 2019 | Mar. 31, 2020 | Nov. 30, 2018 | Jun. 30, 2020 | Dec. 31, 2019
Loss Contingencies [Line Items] |  |  |  |  |
Regulatory assets |  | $ 6,294 |  |  | $ 6,088
Southern California Edison |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Wildfire-specific insurance coverage |  |  | $ 1,000 |  |
Self-insured retention |  | 10 |  |  |
Regulatory assets |  | 6,294 |  |  | $ 6,088
Southern California Edison | CPUC |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Requested rate increase | $ 478 |  |  |  |
Southern California Edison | Wildfire insurance costs |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Regulatory assets |  | $ 375 |  |  |
Southern California Edison | Forecast |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Wildfire-specific insurance coverage |  |  |  | $ 1,200 |
Co-Insurance per wildfire occurrence |  |  |  | 115 |
Self-insured retention |  |  |  | 50 |
Wildfire-specific insurance coverage, net |  |  |  | $ 1,000 |

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