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Financing Receivables (Schedule Of Credit Risk Profile Based On Payment Activity) (Detail) - Public Service Electric and Gas Company - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Concentration Risk [Line Items]    
Solar Loans $ 89 $ 121
Current Portion of Solar Loans (27) (29)
Noncurrent Portion of Solar Loans $ 62 92
Average loan repayment period 8 years  
Solar Loan I    
Concentration Risk [Line Items]    
Solar Loans $ 9  
Solar Loan II    
Concentration Risk [Line Items]    
Solar Loans 42  
Solar Loan III    
Concentration Risk [Line Items]    
Solar Loans $ 38  
Minimum    
Concentration Risk [Line Items]    
Loan Receivable, term 10 years  
Maximum [Member]    
Concentration Risk [Line Items]    
Loan Receivable, term 15 years  
Commercial/Industrial [Member]    
Concentration Risk [Line Items]    
Solar Loans $ 85 116
Commercial/Industrial [Member] | Solar Loan I    
Concentration Risk [Line Items]    
Loan Receivable, term 15 years  
Commercial/Industrial [Member] | Solar Loan II    
Concentration Risk [Line Items]    
Loan Receivable, term 15 years  
Commercial/Industrial [Member] | Solar Loan III    
Concentration Risk [Line Items]    
Loan Receivable, term 10 years  
Residential [Member]    
Concentration Risk [Line Items]    
Solar Loans $ 4 $ 5
Residential [Member] | Solar Loan I    
Concentration Risk [Line Items]    
Loan Receivable, term 10 years  
Residential [Member] | Solar Loan II    
Concentration Risk [Line Items]    
Loan Receivable, term 10 years  
Residential [Member] | Solar Loan III    
Concentration Risk [Line Items]    
Loan Receivable, term 10 years