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v3.20.4

Equity (Preferred and Preference Stock of Utility) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |  |  |
Redemption of preferred and preference stock |  | $ 308 |  |
5.10% Series G (cumulative) | SCE |  |  |  |
Class of Stock [Line Items] |  |  |  |
Redemption of preferred and preference stock | $ 180 |  |  |
Redemption premium | 6 |  |  |
SCE |  |  |  |
Class of Stock [Line Items] |  |  |  |
Redemption of preferred and preference stock | $ 120 | $ 308 |  |
SCE | Cumulative preferred stock $100 par value |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 100 |  |
Preferred stock, shares authorized |  | 12,000,000 |  |
SCE | Cumulative preferred stock $25 par value |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 25 |  |
Preferred stock, shares authorized |  | 24,000,000 |  |
SCE | No par value |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized |  | 50,000,000 |  |
SCE | 4.32% Series |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 25 |  |
Preferred Stock, dividend rate, (as a percent) | 4.32% | 4.32% |  |
Redemption Price (in dollars per share) | $ 28.75 | $ 28.75 |  |
SCE | 4.08% Series |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 25 |  |
Preferred Stock, dividend rate, (as a percent) | 4.08% | 4.08% |  |
Redemption Price (in dollars per share) | $ 25.50 | $ 25.50 |  |
SCE | 4.24% Series |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 25 |  |
Preferred Stock, dividend rate, (as a percent) | 4.24% | 4.24% |  |
Redemption Price (in dollars per share) | $ 25.80 | $ 25.80 |  |
SCE | 4.78% Series |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 25 |  |
Preferred Stock, dividend rate, (as a percent) | 4.78% | 4.78% |  |
Redemption Price (in dollars per share) | $ 25.80 | $ 25.80 |  |
SCE | Preference stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares issued (in shares) |  |  | 0 | 0
SCE | 5.10% Series G (cumulative) |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Stock, dividend rate, (as a percent) |  | 5.10% |  |
Redemption Price (in dollars per share) |  | $ 2,500.00 |  |
Redemption premium | $ 9 |  |  |

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