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Debt and Credit Facilities (Long-Term Debt Financing Transactions) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2021 | Aug. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |
Commercial Paper |  |  |  | $ 3,519 |  | $ 1,063 |
Issuance of Long-Term Debt |  |  |  | 2,825 |  | 2,450 | $ 1,900
Long-term Debt |  |  |  | 16,036 |  |  |
Premium Paid on Early Extinguishment of Debt |  |  |  | 294 |  | 0 | 0
PSEG [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | 4,146 |  | 2,946 |
PSEG [Member] | Senior Notes Two Point Zero Percent Due In Two Thousand Twenty One [Member] [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | $ 0 |  | 300 |
Stated interest rate of debt instrument |  |  |  | 2.00% |  |  |
Repayments of Long-term Debt |  |  |  | $ 300 |  |  |
PSEG [Member] | Senior Notes Two Point Four Five Percent Due In Two Thousand Thirty One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Issuance of Long-Term Debt |  |  |  | 750 |  |  |
Long-term Debt |  |  |  | $ 750 |  | 0 |
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] |  |  |  |  |  |  |
Issuance of Long-Term Debt |  |  |  | $ 750 |  |  |
Long-term Debt |  |  |  | $ 750 |  | 0 |
Stated interest rate of debt instrument |  |  |  | 0.84% |  |  |
Public Service Electric and Gas Company |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Commercial Paper |  |  |  | $ 0 |  | 100 |
Issuance of Long-Term Debt |  |  |  | 1,325 |  | 1,350 | $ 1,150
Long-term Debt |  |  |  | 11,890 |  | 10,999 |
Public Service Electric and Gas Company | Medium Term Notes Zero Point Nine Five due Two Thousand Twenty Six |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Issuance of Long-Term Debt |  |  |  | $ 450 |  |  |
Stated interest rate of debt instrument |  |  |  | 0.95% |  |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero due Two Thousand Fifty One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Issuance of Long-Term Debt |  |  |  | $ 450 |  |  |
Long-term Debt |  |  |  | $ 450 |  | 0 |
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] |  |  |  |  |  |  |
Issuance of Long-Term Debt |  |  |  | $ 425 |  |  |
Long-term Debt |  |  |  | $ 425 |  | 0 |
Stated interest rate of debt instrument |  |  |  | 1.90% |  |  |
Public Service Electric and Gas Company | Medium Term Notes One Point Nine Zero Percent Due In Two Thousand Twenty One [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt | [1] |  |  | $ 0 |  | 300 |
Stated interest rate of debt instrument |  |  |  | 1.90% |  |  |
Repayments of Long-term Debt |  |  |  | $ 300 |  |  |
Public Service Electric and Gas Company | First And Refunding Mortgage Bonds Nine Point Two Five Percentage Due On Two Twenty One [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt | [1] |  |  | $ 0 |  | 134 |
Stated interest rate of debt instrument |  |  |  | 9.25% |  |  |
Repayments of Long-term Debt |  |  |  | $ 134 |  |  |
PSEG Power LLC [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | 0 |  | 2,348 |
Premium Paid on Early Extinguishment of Debt |  | $ 294 |  |  |  |  |
Write off of Deferred Debt Issuance Cost |  | 4 |  |  |  |  |
PSEG Power LLC [Member] | Senior Notes Three Point Eight Five Percent due Two Thousand Twenty Three [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | $ 0 |  | 700 |
Stated interest rate of debt instrument |  |  |  | 3.85% |  |  |
PSEG Power LLC [Member] | Senior Notes Eight Point Six Three Percent Due Two Thousand Thirty One [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | $ 0 | [2] | 404 |
Stated interest rate of debt instrument |  |  |  | 8.63% |  |  |
Repayments of Long-term Debt |  | 404 |  |  |  |  |
PSEG Power LLC [Member] | Senior Notes Four Point One Five Percentage Due Two Thousand Twenty One [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | $ 0 |  | 700 |
Stated interest rate of debt instrument |  |  |  | 3.00% |  |  |
Repayments of Long-term Debt |  |  |  | $ 700 |  |  |
PSEG Power LLC [Member] | Senior Notes Three Point Zero Percent Due In Two Thousand Twenty One [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | $ 0 |  | 250 |
Stated interest rate of debt instrument |  |  |  | 4.15% |  |  |
Repayments of Long-term Debt |  |  |  | $ 250 |  |  |
PSEG Power LLC [Member] | Pollution Control Notes Floating Rate Due On Two Thousand Nineteen [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | 0 |  | 44 |
Repayments of Long-term Debt |  |  | $ 44 |  |  |  |
PSEG Power LLC [Member] | Senior Notes Four Point Three Percent Due Two Thousand Twenty Three [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  |  |  | $ 0 |  | $ 250 |
Stated interest rate of debt instrument |  |  |  | 4.30% |  |  |
Repayments of Long-term Debt |  | $ 250 |  |  |  |  |
[1] | Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.(C)All outstanding Senior Notes and the Pennsylvania Economic Development Financing Authority Variable Rate Bonds (PEDFA) of PSEG Power were redeemed during 2021 as described below.
[2] | In December 2020, PSEG issued $96 million principal amount of 8.63% Senior Notes due 2031 to holders of a like principal amount of 8.63% Senior Notes due 2031 originally issued by PSEG Power who validly tendered their notes pursuant to an offer to exchange. Upon consummation of the offer to exchange, the PSEG Power notes accepted in the exchange were cancelled. The transaction resulted in a non-cash financing activity for both PSEG and PSEG Power.

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