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Financial Risk Management Activities - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Derivatives, Fair Value [Line Items] |  |  |  |  |
Aoci, cash flow hedge, cumulative gain (loss), after tax | $ 23,000,000 |  | $ 23,000,000 |  | $ 36,000,000
Unrealized gain to be reclassified to earnings during the next twelve months |  |  | 4,000,000 |  |
Reclassification from AOCL, net of tax | (3,000,000) | $ (1,000,000) | (5,000,000) | $ (3,000,000) |
Derivative, fair value, net | (6,000,000) |  | (6,000,000) |  | 75,000,000
Issuance of Long-Term Debt |  |  | 3,150,000,000 | 2,250,000,000 |
PSEG Power |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Fair value of derivatives with credit-risk related contingent features | 71,000,000 |  | 71,000,000 |  | 17,000,000
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral | 41,000,000 |  | 41,000,000 |  | 11,000,000
Additional collateral aggregate fair value | 30,000,000 |  | 30,000,000 |  | 6,000,000
Derivative, fair value, net | (5,000,000) |  | (5,000,000) |  | 43,000,000
Public Service Electric and Gas Company [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Issuance of Long-Term Debt |  |  | 900,000,000 | 1,000,000,000 |
Total credit exposure with counterparties | 0 |  | $ 0 |  |
Investment Grade - External Rating | PSEG Power |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Percentage of credit exposure |  |  | 98.00% |  |
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 AOCL, net of tax | $ 1,000,000 | $ 3,000,000 | $ 1,000,000 | $ 5,000,000 | $ 9,000,000

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