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Debt and Credit Facilities (Long-Term Debt Financing Transactions) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |  |
Commercial Paper |  | $ 949 | $ 2,200 |
Issuance of Long-Term Debt |  | 2,800 | 2,850 | $ 2,825
Long-term Debt |  | 19,411 |  |
Premium Paid on Early Extinguishment of Debt |  | 0 | 0 | 294
Senior Notes Five Point Eight Seven Five Percent due Two Thousand Twenty Eight |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | 600 |  |
Long-term Debt |  | $ 600 | 0 |
Stated interest rate of debt instrument |  | 5.88% |  |
Senior Notes Six Point One Two Five Percent due Two Thousand Thirty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 400 |  |
Long-term Debt |  | $ 400 | 0 |
Stated interest rate of debt instrument |  | 6.13% |  |
PSEG [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 4,396 | 4,146 |
PSEG [Member] | Senior Notes Zero Point Eight Four Percent Due In Two Thousand Twenty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 0 | 750 |
Stated interest rate of debt instrument |  | 0.84% |  |
Repayments of Long-term Debt |  | $ 750 |  |
Public Service Electric and Gas Company |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Commercial Paper |  | 425 | 0 |
Issuance of Long-Term Debt |  | 1,800 | 900 | $ 1,325
Long-term Debt |  | 13,765 | 12,790 |
Public Service Electric and Gas Company | Medium Term Notes Five Point Two Zero Percent due Two Thousand Thirty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | 500 |  |
Long-term Debt | [1] | $ 500 | 0 |
Stated interest rate of debt instrument |  | 5.20% |  |
Public Service Electric and Gas Company | Medium Term Notes Green Bond Four Point Six Five Percent due Two Thousand Thirty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 500 |  |
Long-term Debt | [1] | $ 500 | 0 |
Stated interest rate of debt instrument |  | 4.65% |  |
Public Service Electric and Gas Company | Medium Term Notes Green Bond Five Point One Three Percent due Two Thousand Fifty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 400 |  |
Long-term Debt | [1] | $ 400 | 0 |
Stated interest rate of debt instrument |  | 5.13% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Four Five Percent due Two Thousand Fifty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 400 |  |
Long-term Debt | [1] | $ 400 | 0 |
Stated interest rate of debt instrument |  | 5.45% |  |
Public Service Electric and Gas Company | Medium Term Notes Two Point Three Eight Percent Due In Two Thousand Twenty Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [1] | $ 0 | 500 |
Stated interest rate of debt instrument |  | 2.38% |  |
Repayments of Long-term Debt |  | $ 500 |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Two Five Percent due Two Thousand Twenty Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Face Amount | [1] | $ 0 | 325 |
Stated interest rate of debt instrument |  | 3.25% |  |
Repayments of Long-term Debt |  | $ 325 |  |
PSEG Power LLC [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 1,250 | $ 1,250 |
[1] | Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.

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