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Equity (Issuances) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022
Class of Stock [Line Items] |  |  |
Equity contribution |  | $ 900 |
Preferred stock |  |  |
Class of Stock [Line Items] |  |  |
Proceeds received, net of offering costs |  | $ 2,000 |
Liquidation value (in dollars per share) |  | $ 1,000 |
Redemption amount (in dollars per share) |  | 1,000 |
Redemption amount following change in criteria (in dollars per share) |  | $ 1,020 |
Preferred stock | SCE |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 0 | 0 |
Offering expenses | $ 44 | $ 44 |
Series A |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) |  | 1,250,000 |
Preferred stock, dividend rate, (as a percent) |  | 5.375% |
Dividend reset period |  | 5 years |
Margin rate for dividend rate reset (as a percent) |  | 4.698% |
Series B |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) |  | 750,000 |
Preferred stock, dividend rate, (as a percent) |  | 5.00% |
Dividend reset period |  | 5 years |
Margin rate for dividend rate reset (as a percent) |  | 3.901% |
Stock compensation awards |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 1,253,049 | 629,092 |
Proceeds received, net of offering costs | $ 57 | $ 25 |
In lieu of dividend payment |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 273,642 | 293,031 |
Proceeds received, net of offering costs | $ 18 | $ 17 |
401(K) |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 157,000 | 522,400 |
Proceeds received, net of offering costs | $ 10 | $ 30 |
Optional cash investments |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 109,750 | 26,475 |
Proceeds received, net of offering costs | $ 7 | $ 2 |
Employee Stock Purchase Plan |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 36,912 |  |
Proceeds received, net of offering costs | $ 2 |  |
At-the-market Program (ATM) |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 0 |  |
Aggregate sale price |  |  | $ 500

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