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Pension, OPEB and Savings Plans (Narrative) (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 USD ($) plan | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Number of PSEG's defined contribution plans | plan |  | 2 |  |  |
Defined benefit plan funded status of plan percentage |  | 95.00% |  |  |
Rabbi trust assets used to fund nonqualified pension plans |  | $ 242 |  |  |
Defined benefit plans, projected benefit and accumulated benefit obligations |  | $ 7,100 | $ 7,300 |  |
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 |  | $ 44 | 43 | $ 40 |
Pension Benefits [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax |  | 355 | 545 |  |
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Before Tax |  | 495 | 760 |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | $ (82) | $ (28) | $ 11 |
Discount Rate |  | 2.94% | 2.61% |  | 3.30%
Expected long-term rate of return on plan assets |  | 7.70% | 7.70% | 7.80% |
Interest in Master Trust assets percentage |  | 92.00% |  |  |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment |  | $ 0 | $ 0 |  |
Other Pension Plan, Defined Benefit [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined Benefit Plan, Benefit Obligation |  | 174 |  |  |
Other Benefits [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | $ (96) | $ (77) | $ (59) |
Discount Rate |  | 2.82% | 2.46% |  | 3.20%
Expected long-term rate of return on plan assets |  | 7.69% | 7.70% | 7.79% |
Interest in Master Trust assets percentage |  |  | 8.00% |  |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment |  | $ 0 | $ 4 |  |
Equity Securities [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Target allocation percentage of assets |  | 54.00% |  |  |
Fixed Income Securities [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Target allocation percentage of assets |  | 28.00% |  |  |
Other Investments [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Target allocation percentage of assets |  | 18.00% |  |  |
Real asset through equity securities percentage at year end |  | 14 |  |  |
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 |  | $ 30 |  |  |
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 |  | $ 9 | 9 | $ 8 |
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) |  | $ 37 | $ 30 | $ 28 |
Discount Rate |  | 3.21% | 2.98% | 3.52% |
Expected long-term rate of return on plan assets |  | 7.60% |  |  |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment |  | $ 0 | $ 0 |  |
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 | $ 9 | $ 6 |
Discount Rate |  | 3.28% | 3.08% | 3.60% |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment |  | $ 0 | $ 0 |  |
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% |  |  |
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% |  |  |
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% |  |  |
Real asset through equity securities percentage at year end |  | 0.16 |  |  |
Subsequent Event [Member] | Pension Benefits [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Expected long-term rate of return on plan assets | 7.20% |  |  |  |
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 | 7.60% |  |  |  |

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