Financing Receivables (Schedule Of Credit Risk Profile Based On Payment Activity) (Detail) - PSE&G [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Solar Loans	$ 173	$ 168
Current Portion of Solar Loans	(24)	(18)
Commercial/Industrial [Member]
Concentration Risk [Line Items]
Solar Loans	164	158
Residential [Member]
Concentration Risk [Line Items]
Solar Loans	9	10
Solar Loan Investments [Member]
Concentration Risk [Line Items]
Noncurrent Portion of Solar Loans	$ 149	$ 150

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