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Debt and Credit Facilties (Long-Term Debt) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 16,036 |  |
Long-term Debt, Current Maturities |  | (700) |  | $ (1,684)
Total Long-Term Debt |  | 15,219 |  | 14,496
PSEG [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | 4,146 |  | 2,946
Long-term Debt, Current Maturities |  | (700) |  | (300)
Net Unamortized Discount and Debt Issuance Costs |  | (22) |  | (17)
Total Long-Term Debt |  | 3,424 |  | 2,629
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% |  |
PSEG [Member] | Senior Notes Two Point Six Five Percent Due In Two Thousand Twenty Two [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 700 |  | 700
Stated interest rate of debt instrument |  | 2.65% |  |
PSEG [Member] | Senior Notes Two Point Eight Eight Percent Due In Two Thousand Twenty Four [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 750 |  | 750
Stated interest rate of debt instrument |  | 2.88% |  |
PSEG [Member] | Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 4,146 |  | 2,946
PSEG [Member] | Senior Notes Zero Point Eight Zero Percent Due In Two Thousand Twenty Five |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 550 |  | 550
Stated interest rate of debt instrument |  | 0.80% |  |
PSEG [Member] | Senior Notes One Point Six Zero Percent Due In Two Thousand Thirty |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 550 |  | 550
Stated interest rate of debt instrument |  | 1.60% |  |
PSEG [Member] | Senior Notes Eight Point Six Two Five Percent Due In Two Thousand Thirty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 96 | [1] | 96
Stated interest rate of debt instrument |  | 8.63% |  |
PSEG [Member] | Senior Notes Zero Point Eight Four Percent Due In Two Thousand Twenty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 750 |  | 0
Stated interest rate of debt instrument |  | 0.84% |  |
PSEG [Member] | Senior Notes Two Point Four Five Percent Due In Two Thousand Thirty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 750 |  | 0
Stated interest rate of debt instrument |  | 2.45% |  |
PSEG Power LLC [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 0 |  | 2,348
Long-term Debt, Current Maturities |  | 0 |  | (950)
Net Unamortized Discount and Debt Issuance Costs |  | 0 |  | (6)
Total Long-Term Debt |  | 0 |  | 1,392
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% |  |
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% |  |
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 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% |  |
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 | [1] | 404
Stated interest rate of debt instrument |  | 8.63% |  |
PSEG Power LLC [Member] | Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 0 |  | 2,304
PSEG Power LLC [Member] | Pollution Control Notes Floating Rate Due On Two Thousand Nineteen [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | 0 |  | 44
PSEG Power LLC [Member] | Pollution Control Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | 0 |  | 44
Public Service Electric and Gas Company |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | 11,890 |  | 10,999
Long-term Debt, Current Maturities |  | 0 |  | (434)
Net Unamortized Discount and Debt Issuance Costs |  | (95) |  | (90)
Total Long-Term Debt |  | 11,795 |  | 10,475
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 | [2] | $ 0 |  | 134
Stated interest rate of debt instrument |  | 9.25% |  |
Public Service Electric and Gas Company | First And Refunding Mortgage Bonds Eight Point Zero Zero Percentage Due On Two Thirty Seven [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 7 |  | 7
Stated interest rate of debt instrument |  | 8.00% |  |
Public Service Electric and Gas Company | First And Refunding Mortgage Bonds Five Point Zero Zero Percentage Due On Two Thirty Seven [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 8 |  | 8
Stated interest rate of debt instrument |  | 5.00% |  |
Public Service Electric and Gas Company | First And Refunding Mortgage Bonds [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 15 |  | 149
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 | [2] | $ 0 |  | 300
Stated interest rate of debt instrument |  | 1.90% |  |
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 | [2] | $ 500 |  | 500
Stated interest rate of debt instrument |  | 2.38% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Two Five Percent due Two Thousand Twenty Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate of debt instrument |  | 3.25% |  |
Debt Instrument, Face Amount | [2] | $ 325 |  | 325
Public Service Electric and Gas Company | Medium Term Notes Three Point Seven Five Percent Due In Two Thousand Twenty Four [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 3.75% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point One Five Percent Due In Two Thousand Twenty Four [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 3.15% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero Five Percent Due In Two Thousand Twenty Four [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 3.05% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero Percent Due In Two Thousand Twenty Five [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 350 |  | 350
Stated interest rate of debt instrument |  | 3.00% |  |
Public Service Electric and Gas Company | Medium Term Notes Two Point Two Five Percent due Two Thousand Twenty Six [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 425 |  | 425
Stated interest rate of debt instrument |  | 2.25% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero Percent due Two Thousand Twenty Seven [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 425 |  | 425
Stated interest rate of debt instrument |  | 3.00% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Seven Zero Percent due Two Thousand Twenty Eight [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 375 |  | 375
Stated interest rate of debt instrument |  | 3.70% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Six Five Percent due Two Thousand Twenty Eight [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 325 |  | 325
Stated interest rate of debt instrument |  | 3.65% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Two Zero Percent due Two Thousand Twenty NIne [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 375 |  | 375
Stated interest rate of debt instrument |  | 3.20% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Two Five Percentage Due On Two Thousand Thirty Five [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 5.25% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Seven Zero Percentage Due On Two Thousand Thirty Six [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 5.70% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Eight Zero Percentage Due On Two Thousand Thirty Seven [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 350 |  | 350
Stated interest rate of debt instrument |  | 5.80% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Three Eight Percentage Due On Two Thousand Thirty Nine [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 5.38% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Five Zero Percentage Due On Two Thousand Forty [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 300 |  | 300
Stated interest rate of debt instrument |  | 5.50% |  |
Public Service Electric and Gas Company | Medium-Term Notes 3.95% Due On 2042 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 450 |  | 450
Stated interest rate of debt instrument |  | 3.95% |  |
Public Service Electric and Gas Company | Medium-Term Notes 3.65% Due On 2042 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 350 |  | 350
Stated interest rate of debt instrument |  | 3.65% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Eight Zero Percent Due In Two Thousand Forty Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 400 |  | 400
Stated interest rate of debt instrument |  | 3.80% |  |
Public Service Electric and Gas Company | Medium Term Notes Four Point Zero Percent Due In Two Thousand Forty Four [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 4.00% |  |
Public Service Electric and Gas Company | Medium Term Notes Four Point Zero Five Percent due Two Thousand Forty Five [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 250 | [2] | 250
Stated interest rate of debt instrument |  | 4.05% |  |
Public Service Electric and Gas Company | Medium Term Notes Four Point One Five Percent Due In Two Thousand Forty Five [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 250 |  | 250
Stated interest rate of debt instrument |  | 4.15% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Eight Zero Percent due Two Thousand Forty Six [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 550 |  | 550
Stated interest rate of debt instrument |  | 3.80% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Six Zero Percent due Two Thousand Forty Seven [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 350 |  | 350
Stated interest rate of debt instrument |  | 3.60% |  |
Public Service Electric and Gas Company | Medium Term Notes Four Point Zero Five Percent due Two Thousand Forty Eight [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 325 |  | 325
Stated interest rate of debt instrument |  | 4.05% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Eight Five Percent due Two Thousand Forty Nine [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 375 |  | 375
Stated interest rate of debt instrument |  | 3.85% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Two Zero Percent due Two Thousand Forty NIne [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 400 |  | 400
Stated interest rate of debt instrument |  | 3.20% |  |
Public Service Electric and Gas Company | Total Medium Term Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 11,875 |  | 10,850
Public Service Electric and Gas Company | Medium Term Notes Two Point Four Five due Two Thousand Thirty |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 300 |  | 300
Stated interest rate of debt instrument |  | 2.45% |  |
Public Service Electric and Gas Company | Medium Term Notes 3.15% due 2050 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 300 |  | 300
Stated interest rate of debt instrument |  | 3.15% |  |
Public Service Electric and Gas Company | Medium Term Notes 2.70% due 2050 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 375 |  | 375
Stated interest rate of debt instrument |  | 2.70% |  |
Public Service Electric and Gas Company | Medium Term Notes 2.05% due 2050 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 375 |  | 375
Stated interest rate of debt instrument |  | 2.05% |  |
Public Service Electric and Gas Company | Medium Term Notes Zero Point Nine Five Percent due Two Thousand Twenty Six |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 450 |  | 0
Stated interest rate of debt instrument |  | 0.95% |  |
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 |  | 0
Stated interest rate of debt instrument |  | 1.90% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero due Two Thousand Fifty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 450 |  | $ 0
Stated interest rate of debt instrument |  | 3.00% |  |
[1] | 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.
[2] | 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.

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