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Debt and Credit Facilities - Long-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Long-term Debt $ 21,261  
Long-term Debt, Current Maturities (2,150) $ (1,500)
Total Long-Term Debt 18,964 17,784
PSEG [Member]    
Debt Instrument [Line Items]    
Long-term Debt 4,896 4,396
Long-term Debt, Current Maturities (550) (750)
Net Unamortized Discount and Debt Issuance Costs (30) (25)
Total Long-Term Debt 4,316 3,621
PSEG [Member] | Senior Notes Two Point Eight Eight Percent Due in Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 0 750
Stated interest rate of debt instrument 2.88%  
PSEG [Member] | Senior Notes Zero Point Eight Zero Percent Due in Two Thousand Twenty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 550 550
Stated interest rate of debt instrument 0.80%  
PSEG [Member] | Senior Notes Five Point Eight Five Percent Due in Two Thousand Twenty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 700 700
Stated interest rate of debt instrument 5.85%  
PSEG [Member] | Senior Notes Five Point Eight Eight Percent Due Two Thousand Twenty Eight [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 600 600
Stated interest rate of debt instrument 5.88%  
PSEG [Member] | Senior Notes Five Point Two Zero Percent Due Two Thousand Twenty Nine [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 750 0
Stated interest rate of debt instrument 5.20%  
PSEG [Member] | Senior Notes One Point Six Zero Percent Due In Two Thousand Thirty [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 550 550
Stated interest rate of debt instrument 1.60%  
PSEG [Member] | Senior Notes Eight Point Six Three Percent Due In Two Thousand Thirty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 96 96
Stated interest rate of debt instrument 8.63%  
PSEG [Member] | Senior Notes Two Point Four Five Percent Due In Two Thousand Thirty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 750 750
Stated interest rate of debt instrument 2.45%  
PSEG [Member] | Senior Notes Six Point One Three Percent Due Two Thousand Thirty Three [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 400 400
Stated interest rate of debt instrument 6.13%  
PSEG [Member] | Senior Notes Five Point Four Five Percent Due Two Thousand Thirty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 500 0
Stated interest rate of debt instrument 5.45%  
PSEG [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 4,896 4,396
Public Service Electric and Gas Company [Member]    
Debt Instrument [Line Items]    
Long-term Debt 15,115 13,765
Long-term Debt, Current Maturities (350) (750)
Net Unamortized Discount and Debt Issuance Costs (117) (102)
Total Long-Term Debt 14,648 12,913
Public Service Electric and Gas Company [Member] | First And Refunding Mortgage Bonds Eight Point Zero Zero Percentage Due On Two Thirty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 7 7
Stated interest rate of debt instrument 8.00%  
Public Service Electric and Gas Company [Member] | First And Refunding Mortgage Bonds Five Point Zero Zero Percentage Due On Two Thirty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 8 8
Stated interest rate of debt instrument 5.00%  
Public Service Electric and Gas Company [Member] | First And Refunding Mortgage Bonds [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 15 15
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point Seven Five Percent Due In Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 0 250
Stated interest rate of debt instrument 3.75%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point One Five Percent Due In Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 0 250
Stated interest rate of debt instrument 3.15%  
Public Service Electric and Gas Company [Member] | Medium-Term Notes Three Point Zero Five Percent Due in Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 0 250
Stated interest rate of debt instrument 3.05%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point Zero Zero Percent Due In Two Thousand Twenty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 350 350
Stated interest rate of debt instrument 3.00%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Zero Point Nine Five Percent Due In Two Thousand Twenty Six [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 450 450
Stated interest rate of debt instrument 0.95%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Two Point Two Five Percent due Two Thousand Twenty Six [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 425 425
Stated interest rate of debt instrument 2.25%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point Zero Percent due Two Thousand Twenty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 425 425
Stated interest rate of debt instrument 3.00%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point Seven Zero Percent due Two Thousand Twenty Eight [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 375 375
Stated interest rate of debt instrument 3.70%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point Six Five Percent due Two Thousand Twenty Eight [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 325 325
Stated interest rate of debt instrument 3.65%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Three Point Two Zero Percent due Two Thousand Twenty NIne [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 375 375
Stated interest rate of debt instrument 3.20%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Two Point Four Five due Two Thousand Thirty [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 300 300
Stated interest rate of debt instrument 2.45%  
Public Service Electric and Gas Company [Member] | Medium Term Notes One Point Nine Zero due Two Thousand Thirty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 425 425
Stated interest rate of debt instrument 1.90%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Green Bond Three Point One Zero due Two Thousand Thirty Two [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 500 500
Stated interest rate of debt instrument 3.10%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Four Point Nine Zero due Two Thousand Thirty Two [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 400 400
Stated interest rate of debt instrument 4.90%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Green Bond Four Point Six Five Percent due Two Thousand Thirty Three [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 500 500
Stated interest rate of debt instrument 4.65%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Two Zero Percent due Two Thousand Thirty Three [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 500 500
Stated interest rate of debt instrument 5.20%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Green Bond Five Point Two Zero Percent due Two Thousand Thirty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 450 0
Stated interest rate of debt instrument 5.20%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Green Bond Four Point Eight Five Percent Due Two Thousand Thirty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 600 0
Stated interest rate of debt instrument 4.85%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Two Five Percentage Due On Two Thousand Thirty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 250 250
Stated interest rate of debt instrument 5.25%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Seven Zero Percentage Due On Two Thousand Thirty Six [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 250 250
Stated interest rate of debt instrument 5.70%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Eight Zero Percentage Due On Two Thousand Thirty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 350 350
Stated interest rate of debt instrument 5.80%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Three Eight Percentage Due On Two Thousand Thirty Nine [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 250 250
Stated interest rate of debt instrument 5.38%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Five Zero Percentage Due On Two Thousand Forty [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 300 300
Stated interest rate of debt instrument 5.50%  
Public Service Electric and Gas Company [Member] | Medium-Term Notes 3.95% Due on 2042 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 450 450
Stated interest rate of debt instrument 3.95%  
Public Service Electric and Gas Company [Member] | Medium-Term Notes 3.65% Due on 2042 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 350 350
Stated interest rate of debt instrument 3.65%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.80% Due In 2043 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 400 400
Stated interest rate of debt instrument 3.80%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 4.00% Due in 2044 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 250 250
Stated interest rate of debt instrument 4.00%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 4.05% due 2045 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 250 250
Stated interest rate of debt instrument 4.05%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 4.15% Due In 2045 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 250 250
Stated interest rate of debt instrument 4.15%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.80% due 2046 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 550 550
Stated interest rate of debt instrument 3.80%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.60% due 2047 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 350 350
Stated interest rate of debt instrument 3.60%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 4.05% due 2048 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 325 325
Stated interest rate of debt instrument 4.05%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.85% due 2049 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 375 375
Stated interest rate of debt instrument 3.85%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.20% due 2049 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 400 400
Stated interest rate of debt instrument 3.20%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.15% due 2050 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 300 300
Stated interest rate of debt instrument 3.15%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 2.70% due 2050 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 375 375
Stated interest rate of debt instrument 2.70%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 2.05% due 2050 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 375 375
Stated interest rate of debt instrument 2.05%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 3.00% due 2051 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 450 450
Stated interest rate of debt instrument 3.00%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 5.13% due 2053 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 400 400
Stated interest rate of debt instrument 5.13%  
Public Service Electric and Gas Company [Member] | Medium Term Notes 5.45% due 2053 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 400 400
Stated interest rate of debt instrument 5.45%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Four Five Percent due Two Thousand Fifty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 550 0
Stated interest rate of debt instrument 5.45%  
Public Service Electric and Gas Company [Member] | Medium Term Notes Five Point Three Zero Percent due Two Thousand Fifty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 500 0
Stated interest rate of debt instrument 5.30%  
Public Service Electric and Gas Company [Member] | Total Medium Term Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 15,100 13,750
PSEG Power LLC [Member]    
Debt Instrument [Line Items]    
Long-term Debt 1,250 1,250
Long-term Debt, Current Maturities (1,250) 0
Total Long-Term Debt 0 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
[1] Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.