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Debt and Credit Facilities Debt - Short-Term Liquidity - Additional Information (Details) - USD ($)
$ in Millions
 1 Months Ended 9 Months Ended
Apr. 30, 2024
Aug. 31, 2023
Apr. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Debt Instrument [Line Items]          
Commitments of Single Institution as Percentage of Total Commitments       9.00%  
Line of Credit Facility, Remaining Borrowing Capacity [1]       $ 3,161  
Line of Credit Facility, Maximum Borrowing Capacity [1]       3,825  
Line of Credit Facility, Fair Value of Amount Outstanding [1],[2]       664  
Proceeds from Short-Term Loan       0 $ 750
Repayments of Short-term Debt       500 $ 2,250
Public Service Electric and Gas Company [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Remaining Borrowing Capacity       979  
Line of Credit Facility, Maximum Borrowing Capacity       1,000  
Line of Credit Facility, Fair Value of Amount Outstanding [2]       21  
PSEG Power [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Remaining Borrowing Capacity       1,243  
Line of Credit Facility, Maximum Borrowing Capacity       1,325  
Line of Credit Facility, Fair Value of Amount Outstanding [2]       82  
Uncommitted Letter of Credit Facility [Member] | PSEG Power [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity       200  
Line of Credit Facility, Fair Value of Amount Outstanding       75  
Subsidiary Uncommitted Letter of Credit Facility [Member] | PSEG Power [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity       $ 150  
April 2023 Term Loan [Member]          
Debt Instrument [Line Items]          
Proceeds from Short-Term Loan     $ 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 September 30, 2024, PSEG had $547 million outstanding commercial paper at a weighted average interest rate of 4.95% and PSE&G had no commercial paper outstanding.