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Financial Risk Management Activities - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivatives, Fair Value [Line Items] |  |  |
Aoci, cash flow hedge, cumulative gain (loss), after tax | $ 36 | $ 3 |
Unrealized gain to be reclassified to earnings during the next twelve months | 2 |  |
Reclassification from accumulated other comprehensive income (loss), net of tax | (3) | (225) | $ (30)
Derivative, fair value, net | 75 | 49 |
Issuance of Long-term Debt | 3,350 | 2,800 | 2,850
Interest rate hedge derivative at fair value, net | 32 |  |
PSEG Power |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value of derivatives with credit-risk related contingent features | 17 | 77 |
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral | 11 | 3 |
Additional collateral aggregate fair value | 6 | 74 |
Derivative, fair value, net | 43 | 60 |
Public Service Electric and Gas Company [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Issuance of Long-term Debt | 2,100 | 1,800 | 900
Total credit exposure with counterparties | 0 |  |
Interest Rate Swap | Designated as Hedging Instrument |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, fair value, net | $ 32 | (11) |
Investment Grade - External Rating | PSEG Power |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Percentage of credit exposure | 95.00% |  |
Investment Grade - External Rating | PSEG Power | Minimum [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Percentage of credit exposure | 10.00% |  |
Cash Flow Hedges [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Reclassification from accumulated other comprehensive income (loss), net of tax | $ 9 | 3 | $ (3)
Three Year Variable Rate Term Loan | PSEG Power |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Issuance of Long-term Debt | 1,250 |  |
Three Year Variable Rate Term Loan | Interest Rate Swap | Designated as Hedging Instrument |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, fair value, net | $ 5 | $ 5 |

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