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Schedule I - Condensed Financial Information of Parent (Notes) (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 30, 2022 USD ($) | Apr. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 | Dec. 31, 2018 USD ($) | Sep. 30, 2022 USD ($) | May 31, 2022 USD ($)
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Commitment |  |  | $ 4,850 | $ 4,850 |  |  |  |  |  |
Outstanding borrowings |  |  | 285 | 285 |  |  |  |  |  |
Amount available |  |  | $ 4,134 | $ 4,134 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Equity contribution |  |  |  |  | $ 900 |  |  |  |  |
SCE |  |  |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |
Weighted-average equity component authorization (as a percent) |  |  |  | 52.00% |  |  | 48.00% | 45.20% |  |
Weighted-average common equity component authorization period |  |  |  |  |  |  | 37 months | 37 months |  |
Wildfire related charge incurred after tax |  |  |  |  |  |  |  | $ 1,800 |  |
Spot rate equity ratio |  |  |  |  |  |  |  | 47.70% |  |
Waiver threshold percent |  |  |  |  |  |  |  | 47.70% |  |
Weighted-average common equity component of total capitalization percent |  |  |  |  |  |  |  | 48.70% |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Covenant debt to total capitalization ratio |  |  | 0.65 | 0.65 |  |  |  |  |  |
Actual debt to capitalization ratio |  |  | 0.56 | 0.56 |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |
Long-term receivables due from affiliate |  |  | $ 334 | $ 334 |  |  |  |  |  |
Multi-year credit facilities | SCE |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Commitment |  |  | 3,350 | 3,350 |  |  |  |  |  |
Outstanding borrowings |  |  | 195 | 195 |  |  |  |  |  |
Amount available |  |  | 2,724 | 2,724 |  |  |  |  |  |
Contingent maximum available borrowing |  |  | 4,000 | $ 4,000 |  |  |  |  |  |
Multi-year credit facilities | SOFR | SCE |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Basis points |  |  |  | 1.08% |  |  |  |  |  |
0.55% term loan due 2023 | SCE |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  | $ 730 | $ 730 |  |  |  |  |  |
0.55% term loan due 2023 | SOFR | SCE |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Basis points |  |  |  | 0.55% |  |  |  |  |  |
Series A |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  |  | 1,250,000 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  |  | 1,250,000 |  |  |  |  |
Preferred stock, dividend rate, (as a percent) |  |  |  |  | 5.375% |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  |  |  |  | 4.698% |  |  |  |  |
Series B |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  |  | 750,000 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  |  | 750,000 |  |  |  |  |
Preferred stock, dividend rate, (as a percent) |  |  |  |  | 5.00% |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  |  |  |  | 3.901% |  |  |  |  |
At-the-market Program (ATM) |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 0 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Aggregate sale price |  |  |  |  |  |  |  |  | $ 500 |
Stock issued (in shares) | shares |  |  |  | 0 |  |  |  |  |  |
Stock compensation awards |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 1,253,049 | 629,092 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 1,253,049 | 629,092 |  |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 57 | $ 25 |  |  |  |  |
In lieu of dividend payment |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 273,642 | 293,031 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 273,642 | 293,031 |  |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 18 | $ 17 |  |  |  |  |
401(K) |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 157,000 | 522,400 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 157,000 | 522,400 |  |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 10 | $ 30 |  |  |  |  |
Optional cash investments |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 109,750 | 26,475 |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 109,750 | 26,475 |  |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 7 | $ 2 |  |  |  |  |
Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 36,912 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 36,912 |  |  |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 2 |  |  |  |  |  |
Edison International |  |  |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |  |  |
Cash dividends received from consolidated subsidiaries |  |  |  | $ 1,300 | 975 | $ 1,300 |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Covenant debt to total capitalization ratio |  |  | 0.70 | 0.70 |  |  |  |  |  |
Actual debt to capitalization ratio |  |  | 0.64 | 0.64 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 2,000 |  |  |  |  |  |
Liquidation value (in dollars per share) | $ / shares |  |  | $ 1,000 | $ 1,000 |  |  |  |  |  |
Equity contribution |  |  |  | $ 900 |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |  |  |
Expenses from services provided by SCE |  |  |  | 2 | 2 | 2 |  |  |  |
Interest expense from loans due to affiliates |  |  |  | 3 | 5 | $ 4 |  |  |  |
Current receivables due from affiliates |  |  | $ 389 | 389 | 361 |  |  |  |  |
Current payables due to affiliates |  |  | 166 | 166 | 211 |  |  |  |  |
Long-term receivables due from affiliate |  |  | 8 | 8 | 52 |  |  |  |  |
Long-term payables due to affiliates |  |  | 130 | 130 | $ 227 |  |  |  |  |
Edison International | 2.95% Senior notes due 2023 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 400 | $ 400 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 2.95% | 2.95% |  |  |  |  |  |
Edison International | 3.55% Senior note due 2024 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 500 | $ 500 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 3.55% | 3.55% |  |  |  |  |  |
Edison International | 4.95% Senior notes due 2025 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 400 | $ 400 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 4.95% | 4.95% |  |  |  |  |  |
Edison International | 4.70% Senior notes due 2025 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 400 | $ 400 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 4.70% | 4.70% |  |  |  |  |  |
Edison International | 5.75% Senior notes due 2027 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 600 | $ 600 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 5.75% | 5.75% |  |  |  |  |  |
Edison International | 4.125% Senior notes due 2028 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 550 | $ 550 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 4.125% | 4.125% |  |  |  |  |  |
Edison International | 6.95% senior notes due in 2029 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 550 | $ 550 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 6.95% | 6.95% |  |  |  |  |  |
Edison International | Multi-year credit facilities |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Commitment |  |  | $ 1,500 | $ 1,500 |  |  |  |  |  |
Outstanding borrowings |  |  | 90 | 90 |  |  |  |  |  |
Amount available |  |  | $ 1,410 | $ 1,410 |  |  |  |  |  |
Contingent maximum available borrowing |  |  |  |  |  |  |  |  |  | $ 2,000
Edison International | 0.70% term loan due April 2023 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Debt, face amount |  | $ 600 |  |  |  |  |  |  |  |
Edison International | 0.70% term loan due April 2023 | SOFR |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Basis points |  | 0.70% |  |  |  |  |  |  |  |
Edison International | 0.95% term loan due in November 2023 |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Debt, face amount | $ 400 |  |  |  |  |  |  |  |  |
Edison International | 0.95% term loan due in November 2023 | SOFR |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Basis points | 0.95% |  |  |  |  |  |  |  |  |
Edison International | Series A |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 1,250,000 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 1,250,000 |  |  |  |  |  |
Preferred stock, dividend rate, (as a percent) |  |  |  | 5.375% |  |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  |  | 4.698% | 4.698% |  |  |  |  |  |
Edison International | Series B |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 750,000 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 750,000 |  |  |  |  |  |
Preferred stock, dividend rate, (as a percent) |  |  |  | 5.00% |  |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  |  | 3.901% | 3.901% |  |  |  |  |  |
Edison International | At-the-market Program (ATM) |  |  |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 0 | 0 |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  |  |
Aggregate sale price |  |  |  |  |  |  |  |  | $ 500,000 |
Stock issued (in shares) | shares |  |  | 0 | 0 |  |  |  |  |  |

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