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Debt and Credit Facilities Debt - Short-Term Liquidity - Additional Information (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Dec. 31, 2024
Apr. 30, 2024
Aug. 31, 2023
Apr. 30, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]              
Commitments of Single Institution as Percentage of Total Commitments 9.00%       9.00%    
Line of Credit Facility, Remaining Borrowing Capacity [1] $ 2,511       $ 2,511    
Line of Credit Facility, Maximum Borrowing Capacity [1] 3,825       3,825    
Line of Credit Facility, Fair Value of Amount Outstanding [1],[2] 1,314       1,314    
Proceeds from Short-Term Loans         400 $ 750 $ 2,000
Repayments of Short-term Debt         500 $ 2,250 $ 2,500
Public Service Electric and Gas Company              
Debt Instrument [Line Items]              
Line of Credit Facility, Remaining Borrowing Capacity 532       532    
Line of Credit Facility, Maximum Borrowing Capacity 1,000       1,000    
Line of Credit Facility, Fair Value of Amount Outstanding [2] 468       468    
PSEG Power [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Remaining Borrowing Capacity 1,243       1,243    
Line of Credit Facility, Maximum Borrowing Capacity 1,325       1,325    
Line of Credit Facility, Fair Value of Amount Outstanding [2] 82       82    
Uncommitted Letter of Credit Facility [Member] | PSEG Power [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 200       200    
Line of Credit Facility, Fair Value of Amount Outstanding 75       75    
Subsidiary Uncommitted Letter of Credit Facility [Member] | PSEG Power [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 150       $ 150    
December 2024 Term Loan [Member]              
Debt Instrument [Line Items]              
Proceeds from Short-Term Loans 400            
December 2024 Term Loan [Member] | PSEG Power [Member]              
Debt Instrument [Line Items]              
Proceeds from Short-Term Loans $ 1,250            
April 2023 Term Loan [Member]              
Debt Instrument [Line Items]              
Proceeds from Short-Term Loans       $ 750      
Repayments of Short-term Debt   $ 500 $ 250        
[1] Amounts do not include uncommitted credit facilities or 364-day term loans, if any apply.
[2] The primary use of PSEG’s and PSE&G’s credit facilities is to support their respective Commercial Paper Programs, under which as of December 31, 2024, PSEG had $749 million outstanding commercial paper at a weighted average interest rate of 4.78% and PSE&G had $444 million commercial paper outstanding at a weighted average interest rate of 4.71%.