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, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Solar Loans	$ 63	$ 89
Current Portion of Solar Loans	(23)	(27)
Noncurrent Portion of Solar Loans	$ 40	62
Average loan repayment period	8 years
Solar Loan I
Concentration Risk [Line Items]
Solar Loans	$ 4
Solar Loan II
Concentration Risk [Line Items]
Solar Loans	30
Solar Loan III
Concentration Risk [Line Items]
Solar Loans	$ 29
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	$ 60	85
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	$ 3	$ 4
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

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Amortized cost, before allowance for credit loss, of financing receivable classified as current. Excludes net investment in lease.

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