Financing Receivables - Schedule of Outstanding Loans by Class of Customer (Details) - Public Service Electric and Gas Company [Member] - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Dec. 31, 2024
Concentration Risk [Line Items]
Outstanding Loans by Class of Customers	$ 31	$ 40
Current Portion (included in Accounts Receivable)	(15)	(17)
Noncurrent Portion (included in Long-Term Investments)	16	23
Commercial/Industrial [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customers	29	38
Residential [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customers	2	$ 2
Solar Loan II [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customers	$ 15
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 Customers	$ 16
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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