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Commitments and Contingencies (Recovery of Wildfire-Related Costs) (Details) - USD ($) $ in Millions |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 12, 2019 | Sep. 30, 2019 | Apr. 30, 2019 | Sep. 30, 2019
Loss Contingencies [Line Items] |  |  |  |
Anticipated raise from issuance of equity |  |  |  | $ 1,200
Southern California Edison |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Initial contribution |  | $ 2,400 |  |
Annual contribution | $ 95 |  |  |
Anticipated issuance of long-term debt |  |  |  | $ 1,200
Maximum aggregate requirement to reimburse the insurance fund percent | 20.00% |  |  |
Initial Liability Cap | $ 2,500 |  |  |
Excluded wildfire risk mitigation capital expenditures | 1,600 |  |  |
Southern California Edison | FERC |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Additional ROE |  | 0.85% | 6.00% |
SCE, SDG&E and PG&E |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Annual contribution | 3,000 |  |  |
Contributions expected to be collected from ratepayers | 13,500 |  |  |
SCE and SDG&E |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Initial contribution | 2,700 |  |  |
Annual contribution | 1,000 |  |  |
PG&E |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Insurance Fund, Expected Initial Contribution | $ 4,800 |  |  |

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