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Debt and Credit Facilities - Schedule of Line of Credit Facilities (Parenthetical) (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity [1] $ 3,825  
Commercial Paper and Loans 829 $ 1,593
PSEG Power [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 1,325  
Public Service Electric and Gas Company [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 1,000  
Commercial Paper and Loans 0 $ 444
Revolving Credit Facility [Member] | PSEG Power [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 1,250  
Revolving Credit Facility [Member] | Public Service Electric and Gas Company [Member]    
Debt Instrument [Line Items]    
Commercial Paper and Loans 0  
PSEG [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 1,500  
PSEG [Member] | Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 1,500  
Commercial Paper and Loans $ 429  
Short-term Debt, Weighted Average Interest Rate, at Point in Time 4.51%  
[1] Amounts do not include uncommitted credit facilities or 364-day term loans, if any apply.