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Commitments and Contingencies (Schedule of Estimated Losses) (Details) - 2017/2018 Wildfire/Mudslide Event - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 31 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2020
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |
Loss estimate balance at December 31, 2019 | $ 4,500 | $ 5,801 |  | $ 4,541 |  |
Increase in accrued estimated losses to reflect best estimate | 1,297 |  | $ 0 | 1,297 | $ 0 |
Amounts paid |  |  |  | (37) |  |
Fixed payments to be made under settlement agreements |  |  |  | (1,192) |  |
Loss estimate balance | 4,609 |  |  | 4,609 |  |
Fixed payments to be made under executed settlement agreements3 | 1,192 |  |  | 1,192 |  |
Estimated total liabilities at September 30, 2020 | 4,600 | 4,541 | 5,801 | 4,600 | 5,801 | $ 4,500
Charge for wildfire-related claims | 1,297 |  | 0 | 1,297 | 0 |
Expected insurance recoveries | 0 |  | 0 | 0 | 0 |
Expected revenue from FERC customers | (84) |  | 0 | (84) | 0 |
Total pre-tax charge | 1,213 |  | 0 | 1,213 | 0 |
Income tax benefit | (339) |  | 0 | (339) | 0 |
Total after-tax charge | 874 |  | 0 | 874 | 0 |
Southern California Edison |  |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |
Loss estimate balance at December 31, 2019 | 4,500 | 5,801 |  | 4,541 |  |
Increase in accrued estimated losses to reflect best estimate | 1,297 |  | 0 | 1,297 | 0 | 6,200
Amounts paid |  | (360) |  | (37) |  |
Fixed payments to be made under settlement agreements |  |  |  | (1,192) |  | (1,600)
Loss estimate balance | 4,609 |  |  | 4,609 |  |
Fixed payments to be made under executed settlement agreements3 | 1,192 |  |  | 1,192 |  |
Estimated total liabilities at September 30, 2020 | 4,600 | $ 4,541 | 5,801 | 4,600 | 5,801 | 4,500
Charge for wildfire-related claims | 1,297 |  | 0 | 1,297 | 0 | $ 6,200
Expected insurance recoveries | 0 |  | 0 | 0 | 0 |
Expected revenue from FERC customers | (84) |  | 0 | (84) | 0 |
Total pre-tax charge | 1,213 |  | 0 | 1,213 | 0 |
Income tax benefit | (339) |  | 0 | (339) | 0 |
Total after-tax charge | $ 874 |  | $ 0 | $ 874 | $ 0 |

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