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v3.21.1

Equity (Quarter) (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2021 | May 31, 2019
Class of Stock [Line Items] |  |  |
Equity contribution | $ 575 |  |
Series A Preferred Stock, 5.375% |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) | 1,250,000 |  |
Proceeds received, net of offering costs | $ 1,200 |  |
Preferred Stock, dividend rate, (as a percent) | 5.375% |  |
Liquidation value (in dollars per share) | $ 1,000 | $ 1,000 |
Dividend reset period | 5 years |  |
Margin rate for dividend rate reset (as a percent) | 4.698% | 4.698% |
Redemption amount (in dollars per share) | $ 1,000 | $ 1,000 |
Redemption amount following change in criteria (in dollars per share) | $ 1,020 | $ 1,020 |
SCE |  |  |
Class of Stock [Line Items] |  |  |
Capital contributions |  | $ 900 |
At-the-market Program (ATM) |  |  |
Class of Stock [Line Items] |  |  |
Aggregate sale price |  |  | $ 1,500
Stock issued (in shares) |  | 0 |
Aggregate sales price remaining | $ 1,300 | $ 1,300 |
401(K) |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) |  | 259,700 |
Proceeds received, net of offering costs |  | $ 15 |
Stock compensation awards |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) |  | 183,985 |
Proceeds received, net of offering costs |  | $ 4 |
In lieu of dividend payment |  |  |
Class of Stock [Line Items] |  |  |
Stock issued (in shares) |  | 74,854 |
Proceeds received, net of offering costs |  | $ 4 |

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