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Debt and Credit Facilities (Long-Term Debt Financing Transactions) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |
Commercial Paper |  | $ 2,200 | $ 3,519 |
Issuance of Long-Term Debt |  | 2,850 | 2,825 | $ 2,450
Long-term Debt |  | 18,186 |  |
Premium Paid on Early Extinguishment of Debt |  | 0 | 294 | 0
PSEG [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | 4,146 | 4,146 |
PSEG [Member] | Senior Notes Two Point Four Five Percent Due In Two Thousand Thirty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 750 | 750 |
Stated interest rate of debt instrument |  | 2.45% |  |
PSEG [Member] | Senior Notes Zero Point Eight Four Percent Due In Two Thousand Twenty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 750 | 750 |
Stated interest rate of debt instrument |  | 0.84% |  |
PSEG [Member] | Senior Notes Two Point Six Five Percent Due In Two Thousand Twenty Two [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 0 | 700 |
Stated interest rate of debt instrument |  | 2.65% |  |
Repayments of Long-term Debt |  | $ 700 |  |
PSEG [Member] | Senior Notes Five Point Eight Five Percent Due In Two Thousand Twenty Seven |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | 700 |  |
Long-term Debt |  | $ 700 | 0 |
Stated interest rate of debt instrument |  | 5.85% |  |
Public Service Electric and Gas Company |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 900 | 1,325 | $ 1,350
Long-term Debt |  | 12,790 | 11,890 |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero due Two Thousand Fifty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [1] | $ 450 | 450 |
Stated interest rate of debt instrument |  | 3.00% |  |
Public Service Electric and Gas Company | Medium Term Notes One Point Nine Zero due Two Thousand Thirty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 425 | 425 |
Stated interest rate of debt instrument |  | 1.90% |  |
Public Service Electric and Gas Company | Medium Term Notes Green Bond Three Point One Zero due Two Thousand Thirty Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 500 |  |
Long-term Debt |  | $ 500 | 0 |
Stated interest rate of debt instrument |  | 3.10% |  |
Public Service Electric and Gas Company | Medium Term Notes Four Point Nine Zero due Two Thousand Thirty Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 400 |  |
Long-term Debt |  | $ 400 | 0 |
Stated interest rate of debt instrument |  | 4.90% |  |
PSEG Power LLC [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 1,250 | 0 |
PSEG Power LLC [Member] | Senior Notes Three Point Eight Five Percent due Two Thousand Twenty Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 1,250 | $ 0 |
PSEG Power LLC [Member] | Senior Notes Eight Point Six Three Percent Due Two Thousand Thirty One [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate of debt instrument |  | 8.63% |  |
PSEG Power LLC [Member] | Three Year Variable rate term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance of Long-Term Debt |  | $ 1,250 |  |
[1] | Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.

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