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Financing Receivables (Schedule Of Credit Risk Profile Based On Payment Activity) (Detail) - PSE&G [Member] - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Concentration Risk [Line Items]    
Credit Risk Profile Based on Payment Activity $ 189 $ 201
Commercial/Industrial [Member]    
Concentration Risk [Line Items]    
Loans Receivable, Net 177 188
Residential [Member]    
Concentration Risk [Line Items]    
Loans Receivable, Net $ 12 $ 13