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Compensation and Benefit Plans - Narrative (Details) - USD ($) shares in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pension and Other Postretirement Benefits |  |  |
Health reimbursement monthly contribution | $ 200 |  |
Permissible range of asset class weights (percent) | 5.00% |  |
Assumed average equity risk premium (percent) | 4.00% |  |
Forecasted return on private equity and opportunistic investments (percent) | 3.00% |  |
Performance incentive plan award (in shares) | 71 |  |
Share-based compensation available for grant (in shares) | 13 |  |
Employee Stock Option |  |  |
Pension and Other Postretirement Benefits |  |  |
Expiration period | 10 years |  |
Volatility period | 56 months | 58 months | 60 months
Employee Stock Option | Minimum |  |  |
Pension and Other Postretirement Benefits |  |  |
Vesting period | 3 years |  |
Employee Stock Option | Maximum |  |  |
Pension and Other Postretirement Benefits |  |  |
Vesting period | 4 years |  |
Pension Plan |  |  |
Pension and Other Postretirement Benefits |  |  |
Expected contributions | $ 44,000,000 |  |
Gain (loss) from change in discount rate | $ 159,000,000 | $ (96,000,000) |
Basis points in the discount rate | 0.0052 |  |
Discount rate | 5.56% | 5.04% |
Publicly traded equity investments located in the US (percent) | 64.00% | 62.00% |
Pension Plan | Defined Benefit Plan, Equity Securities, US |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 17.30% |  |
Pension Plan | Defined Benefit Plan, Equity Securities, Non-US |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 9.70% |  |
Pension Plan | Fixed Income |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 55.00% |  |
Pension Plan | Opportunistic Alternative Investments |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 18.00% |  |
Pension Plan | SCE |  |  |
Pension and Other Postretirement Benefits |  |  |
Expected contributions |  | $ 15,000,000 |
Gain (loss) from change in discount rate | $ 146,000,000 | $ (92,000,000) |
Basis points in the discount rate | (0.0032) |  |
Discount rate | 5.56% | 5.04% | 5.36%
Other Postretirement Benefits Plan |  |  |
Pension and Other Postretirement Benefits |  |  |
Expected contributions | $ 0 |  |
Gain (loss) from change in discount rate | $ 41,000,000 | $ 553,000,000 |
Discount rate | 5.60% | 5.06% |
Eligibility age | 55 years |  |
Service period for eligibility (at least) (years) | 10 years |  |
Publicly traded equity investments located in the US (percent) | 78.00% | 78.00% |
Other Postretirement Benefits Plan | Fixed Income |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 65.00% |  |
Other Postretirement Benefits Plan | Opportunistic Alternative Investments |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 6.00% |  |
Other Postretirement Benefits Plan | Global Equities |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 29.00% |  |
Other Postretirement Benefits Plan | SCE |  |  |
Pension and Other Postretirement Benefits |  |  |
Gain (loss) from change in discount rate |  | $ 550,000,000 |
Discount rate | 5.60% | 5.06% |
Other Pension, Postretirement and Supplemental Plans | Defined Benefit Plan, Equity Securities, Non-US |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 95.00% |  |
Other Pension, Postretirement and Supplemental Plans | Global Equities |  |  |
Pension and Other Postretirement Benefits |  |  |
Target plan asset allocations (percent) | 5.00% |  |

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