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Debt and Credit Facilties (Long-Term Debt) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 19,411 |  |
Long-term Debt, Current Maturities |  | (1,500) |  | $ (1,575)
Total Long-Term Debt |  | 17,784 |  | 16,495
Senior Notes Five Point Eight Seven Five Percent due Two Thousand Twenty Eight |  |  |  |
Debt Instrument [Line Items] |  |  |  |
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] |  |  |  |
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
Long-term Debt, Current Maturities |  | (750) |  | (750)
Net Unamortized Discount and Debt Issuance Costs |  | (25) |  | (22)
Total Long-Term Debt |  | 3,621 |  | 3,374
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 |  | $ 4,396 |  | 4,146
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 |  | $ 0 |  | 750
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 |  | 750
Stated interest rate of debt instrument |  | 2.45% |  |
PSEG [Member] | Senior Notes Five Point Eight Five Percent Due In Two Thousand Twenty Seven |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 700 |  | 700
Stated interest rate of debt instrument |  | 5.85% |  |
PSEG Power LLC [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 1,250 |  | 1,250
Total Long-Term Debt |  | 1,250 |  | 1,250
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 |  | 1,250
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% |  |
Public Service Electric and Gas Company |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 13,765 |  | 12,790
Long-term Debt, Current Maturities |  | (750) |  | (825)
Net Unamortized Discount and Debt Issuance Costs |  | (102) |  | (94)
Total Long-Term Debt |  | 12,913 |  | 11,871
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 |  | 15
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] | $ 0 |  | 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] | $ 0 |  | 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 |  | $ 13,750 |  | 12,775
Public Service Electric and Gas Company | Medium Term Notes Two Point Four Five due Two Thousand Thirty |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 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 | [2] | $ 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 | [2] | $ 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 | [2] | $ 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 | [2] | $ 450 |  | 450
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 | [2] | $ 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] |  |  |  |
Long-term Debt | [2] | $ 500 |  | 500
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] |  |  |  |
Long-term Debt | [2] | $ 400 |  | 400
Stated interest rate of debt instrument |  | 4.90% |  |
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] |  |  |  |
Long-term Debt | [2] | $ 500 |  | 0
Stated interest rate of debt instrument |  | 4.65% |  |
Public Service Electric and Gas Company | Medium Term Notes Five Point Two Zero Percent due Two Thousand Thirty Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 500 |  | 0
Stated interest rate of debt instrument |  | 5.20% |  |
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] |  |  |  |
Long-term Debt | [2] | $ 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] |  |  |  |
Long-term Debt | [2] | $ 400 |  | 0
Stated interest rate of debt instrument |  | 5.45% |  |
Public Service Electric and Gas Company | Medium Term Notes Three Point Zero Percent due Two Thousand Fifty One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [2] | $ 450 |  | $ 450
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.

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-4 + Details
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