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Pension, OPEB and Savings Plans (Narrative) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2024 | Dec. 31, 2023 USD ($) plan | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Number of PSEG's defined contribution plans | plan |  |  |  |  | 2 |  |
Defined benefit plan funded status of plan percentage |  |  |  |  | 87.00% |  |
Defined benefit plans, projected benefit and accumulated benefit obligations | $ 4,700 |  |  |  | $ 4,700 | $ 5,500 |
Maximum annual 401(k) contribution per employee, percent |  |  |  |  | 50.00% |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  |  |  | 50.00% |  |
Total Employer Matching Contributions |  |  |  |  | $ 43 | 42 | $ 44
Pension Lift Out Settlement Charge | 6 | $ 332 |  |  | 334 |  |
Pension Lift Out Settlement Charge, net of tax | 4 | $ 239 |  |  | 240 |  |
Pension Benefits [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax | 102 |  |  |  | 102 | 426 |
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Before Tax | $ 143 |  |  |  | 143 | 594 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  |  |  |  | $ 409 | $ (115) | $ (82)
Discount Rate | 5.02% |  | 2.94% |  | 5.02% | 5.20% | 2.94%
Expected long-term rate of return on plan assets |  |  |  |  | 8.10% | 7.20% | 7.70%
Interest in Master Trust assets percentage |  |  |  |  | 90.00% |  |
Pension Lift Out Settlement Charge |  |  |  |  | $ 338 | $ 0 | $ 0
Other Pension Plan, Defined Benefit [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Benefit Obligation | $ 140 |  |  |  | 140 |  |
Other Benefits [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  |  |  |  | $ (43) | $ (124) | $ (96)
Discount Rate | 4.96% |  | 2.82% |  | 4.96% | 5.16% | 2.82%
Expected long-term rate of return on plan assets |  |  |  |  | 8.10% | 7.20% | 7.69%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 5 |  |  |  | $ 5 |  |
Interest in Master Trust assets percentage |  |  |  |  | 10.00% |  |
Pension Lift Out Settlement Charge |  |  |  |  | $ 0 | $ 0 | $ 0
Equity Securities [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Target allocation percentage of assets | 54.00% |  |  |  | 54.00% |  |
Fixed Income Securities [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Target allocation percentage of assets | 28.00% |  |  |  | 28.00% |  |
Other Investments [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Target allocation percentage of assets | 18.00% |  |  |  | 18.00% |  |
Real asset through equity securities percentage at year end | 0.13 |  |  |  | 0.13 |  |
Thrift Plan [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Employer matching contribution, percent |  |  |  |  | 8.00% |  |
Savings Plan [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Employer matching contribution, percent |  |  |  |  | 7.00% |  |
Long Island Electric Utility Servco LLC Pension and OPEB [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Number of PSEG's defined contribution plans | plan |  |  |  |  | 2 |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 25 |  |  |  | $ 25 |  |
Maximum annual 401(k) contribution per employee, percent |  |  |  |  | 50.00% |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  |  |  | 50.00% |  |
Employer matching contribution, percent |  |  |  |  | 8.00% |  |
Total Employer Matching Contributions |  |  |  |  | $ 10 | 9 | 9
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  |  |  |  | $ 18 | $ 30 | $ 37
Discount Rate | 5.13% |  | 3.21% |  | 5.13% | 5.30% | 3.21%
Expected long-term rate of return on plan assets |  |  |  |  | 8.00% |  |
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Other Benefits [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  |  | $ 11 |  | $ 12 | $ 10 |
Discount Rate | 5.16% |  | 3.28% |  | 5.16% | 5.34% | 3.28%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Equity Securities [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Target allocation percentage of assets | 60.00% |  |  |  | 60.00% |  |
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Fixed Income Securities [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Target allocation percentage of assets | 25.00% |  |  |  | 25.00% |  |
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Other Investments [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Target allocation percentage of assets | 15.00% |  |  |  | 15.00% |  |
Real asset through equity securities percentage at year end | 0.15 |  |  |  | 0.15 |  |
Subsequent Event [Member] | Pension Benefits [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  | 8.10% |  |  |
Subsequent Event [Member] | Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  | 8.00% |  |  |

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