Financing Receivables - Schedule of Outstanding Loans by Class of Customer (Details) - Public Service Electric and Gas Company [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Concentration Risk [Line Items]
Outstanding Loans by Class of Customers	$ 36	$ 40
Current Portion (included in Accounts Receivable)	(16)	(17)
Noncurrent Portion (included in Long-Term Investments)	20	23
Commercial/Industrial [Member]
Concentration Risk [Line Items]
Outstanding Loans by Class of Customers	34	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	$ 18
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	$ 18
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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