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Commitments and Contingencies (Wildfires) (Details) $ in Millions | 1 Months Ended | 2 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 31, 2021 USD ($) | Jan. 31, 2021 $ / claim | Oct. 31, 2020 USD ($) | Apr. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2020 $ / claim | Dec. 31, 2019 USD ($) | Sep. 30, 2023 USD ($) plaintiff | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
2017/2018 Wildfire/Mudslide Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in estimated loss |  |  |  |  | $ 475 |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  | 27 |  |  | $ 50 |  |  | $ 33 | $ 76 |  |  |
Total after-tax charge |  |  |  |  | 323 |  |  | 598 |  |  | 384 | 879 |  |  |
Payments |  |  |  |  |  |  |  |  |  |  | 747 |  |  |  |
Charge for wildfire-related claims |  |  |  |  | 937 |  |  |  |  |  | 937 |  | $ 1,119 |  |
Total pre-tax charge |  |  |  |  | 448 |  |  | 830 |  |  | 532 | 1,220 |  |  |
Increase in accrued estimated losses |  |  |  |  | 475 |  |  | 880 |  |  | $ 565 | 1,296 |  |  |
2017/2018 Wildfire/Mudslide Events | Individual Plaintiff Settlements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of plaintiffs | plaintiff |  |  |  |  |  |  |  |  |  |  | 2,000 |  |  |  |
Post-2018 Wildfires |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in estimated loss |  |  |  |  |  |  |  |  |  |  | $ 124 |  |  |  |
Expected revenue through electric rates |  |  |  |  |  |  |  | 162 |  |  |  | 162 |  |  |
Total after-tax charge |  |  |  |  | 5 |  |  | 6 |  |  | 9 | 14 |  |  |
Payments |  |  |  |  |  |  |  |  |  |  | 16 |  |  |  |
Charge for wildfire-related claims |  |  |  |  | 790 |  |  |  |  |  | 790 |  | 682 |  |
Total pre-tax charge |  |  |  |  | 7 |  |  | 9 |  |  | 13 | 20 |  |  |
Increase in accrued estimated losses |  |  |  |  | 118 |  |  | 415 |  |  | 124 | 565 |  |  |
SCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  | 11,182 |  |  |  |  |  | 11,182 |  | 10,678 |  |
SCE | 2017/2018 Wildfire/Mudslide Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  | 27 |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  | 51 |  |  |  |  |  | 51 |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | SED Settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charge for wildfire-related claims | $ 550 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fine to State | 110 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholder-funded safety measures costs | 65 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party uninsured claims cost recovery waiver | $ 375 |  |  |  |  |  |  |  |  |  |  |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | Local Public Entity Settlements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments |  |  |  |  |  |  |  |  |  | $ 360 |  |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | TKM Subrogation Settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments |  |  | $ 1,200 |  |  |  |  |  |  |  |  |  |  |  |
Payment agreement for each dollar of claim | $ / claim |  |  |  |  |  |  |  |  | 0.555 |  |  |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | Individual Plaintiff Settlements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments |  |  |  |  | 316 | $ 278 | $ 148 |  |  |  |  |  | $ 1,700 | $ 1,700 | $ 300
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charge for wildfire-related claims |  |  |  |  | 209 |  |  |  |  |  | 209 |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charge for wildfire-related claims |  |  |  |  | 65 |  |  |  |  |  | 65 |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | Estimated Losses for Remaining Alleged and Potential Claims |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charge for wildfire-related claims |  |  |  |  | 728 |  |  |  |  |  | 728 |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  |  |  |  |  |  |  | 409 |  |  |  |
Payments |  |  |  |  |  |  |  |  |  |  | 8,400 |  |  |  |
Increase in accrued estimated losses |  |  |  |  |  |  |  |  |  |  | $ 9,300 |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate | Individual Plaintiff Settlements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of plaintiffs | plaintiff |  |  |  |  |  |  |  |  |  |  | 11,000 |  |  |  |
SCE | November 2018 Wildfires | Woolsey Subrogation Settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments |  |  |  | $ 2,200 |  |  |  |  |  |  |  |  |  |  |
Payment agreement for each dollar of claim | $ / claim |  | 0.67 |  |  |  |  |  |  |  |  |  |  |  |  |
SCE | Post-2018 Wildfires |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  |  |  |  | 162 |  |  |  | 162 |  |  |
Total after-tax charge |  |  |  |  | 3 |  |  |  |  |  | $ 7 | 8 |  |  |
Regulatory Assets |  |  |  |  | 166 |  |  |  |  |  | 166 |  |  |  |
Total pre-tax charge |  |  |  |  | 4 |  |  |  |  |  | 10 | 11 |  |  |
Increase in accrued estimated losses |  |  |  |  | 118 |  |  | $ 415 |  |  | 124 | $ 565 |  |  |
Expected insurance recoveries |  |  |  |  | $ 560 |  |  |  |  |  | 560 |  |  |  |
SCE | Post-2018 Wildfires | Aggregate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  |  |  |  |  |  |  | 166 |  |  |  |
Total after-tax charge |  |  |  |  |  |  |  |  |  |  | 48 |  |  |  |
Payments |  |  |  |  |  |  |  |  |  |  | 30 |  |  |  |
Increase in accrued estimated losses |  |  |  |  |  |  |  |  |  |  | 820 |  |  |  |
SCE | Post-2018 Wildfires | Aggregate | CPUC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  |  |  |  |  |  |  | 152 |  |  |  |
SCE | Post-2018 Wildfires | Aggregate | FERC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected revenue through electric rates |  |  |  |  |  |  |  |  |  |  | $ 14 |  |  |  |

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