Financing Receivables - Schedule of Outstanding Loans by Class of Customer (Details) - Public Service Electric and Gas Company [Member] - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Concentration Risk [Line Items]
Outstanding Loans by Class of Customer	$ 44	$ 63
Current Portion (included in Accounts Receivable)	(18)	(23)
Noncurrent Portion (included in Long-Term Investments)	26	40
Commercial/Industrial [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customer	42	60
Residential [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customer	2	$ 3
Solar Loan I [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customer	$ 1
Solar Loan I [Member] \| Commercial/Industrial [Member]
Concentration Risk [Line Items]
Loan receivable, term	15 years
Solar Loan I [Member] \| Residential [Member]
Concentration Risk [Line Items]
Loan receivable, term	10 years
Solar Loan II [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customer	$ 22
Solar Loan II [Member] \| Commercial/Industrial [Member]
Concentration Risk [Line Items]
Loan receivable, term	15 years
Solar Loan II [Member] \| Residential [Member]
Concentration Risk [Line Items]
Loan receivable, term	10 years
Solar Loan III [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customer	$ 21
Solar Loan III [Member] \| Commercial/Industrial [Member]
Concentration Risk [Line Items]
Loan receivable, term	10 years
Solar Loan III [Member] \| Residential [Member]
Concentration Risk [Line Items]
Loan receivable, term	10 years

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