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Variable Interest Entities (Trusts) (Details) - SCE - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2022
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Common stock | $ 2,168,000,000 |  | $ 2,168,000,000 |  |  |  |  |  |  | $ 2,168,000,000
Trust Securities [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation value (in dollars per share) |  |  |  |  | $ 2,500 |  |  |  |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation value (in dollars per share) |  |  |  |  | $ 25 |  |  |  |  |
Common stock | 10,000 |  | 10,000 |  | $ 10,000 |  |  |  |  | 10,000
Power Purchase Agreement |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Amounts paid to VIEs | 191,000,000 | $ 252,000,000 | 476,000,000 | $ 460,000,000 |  |  |  |  |  |
Trust II |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference |  |  |  |  |  |  |  |  | $ 400,000,000 |
Trust II | Trust Securities [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference | 220,000,000 |  | 220,000,000 |  |  |  |  |  |  | 220,000,000
Trust II | 5.10% Series G Preferred Stock |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  |  |  |  |  | 5.10% |
Liquidation preference | 220,000,000 |  | 220,000,000 |  |  |  |  |  | $ 400,000,000 |
Trust III |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference |  |  |  |  |  |  |  | $ 275,000,000 |  |
Trust III | Trust Securities [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference | 275,000,000 |  | 275,000,000 |  |  |  |  |  |  | 275,000,000
Trust III | 5.75% Series H Preferred Stock |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  |  |  |  | 5.75% |  |
Liquidation preference | 275,000,000 |  | 275,000,000 |  |  |  |  | $ 275,000,000 |  | 275,000,000
Trust IV |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference |  |  |  |  |  |  | $ 325,000,000 |  |  |
Trust IV | Trust Securities [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference | 325,000,000 |  | 325,000,000 |  |  |  |  |  |  | 325,000,000
Trust IV | 5.375% Series J Preferred Stock |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  |  |  | 5.375% |  |  |
Liquidation preference | 325,000,000 |  | 325,000,000 |  |  |  | $ 325,000,000 |  |  | 325,000,000
Trust V |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference |  |  |  |  |  | $ 300,000,000 |  |  |  |
Trust V | Trust Securities [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference | 300,000,000 |  | 300,000,000 |  |  |  |  |  |  | 300,000,000
Trust V | 5.45% Series K Preferred Stock |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  |  | 5.45% |  |  |  |
Liquidation preference | 300,000,000 |  | 300,000,000 |  |  | $ 300,000,000 |  |  |  | 300,000,000
Trust VI |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference |  |  |  |  | $ 475,000,000 |  |  |  |  |
Trust VI | Trust Securities [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Liquidation preference | 475,000,000 |  | 475,000,000 |  |  |  |  |  |  | 475,000,000
Trust VI | 5.00% Series L Preferred Stock |  |  |  |  |  |  |  |  |  |
Variable Interest Entity |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  | 5.00% |  |  |  |  |
Liquidation preference | $ 475,000,000 |  | $ 475,000,000 |  | $ 475,000,000 |  |  |  |  | $ 475,000,000

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