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Financing Receivables (Schedule Of Lease Receivables, Net Of Nonrecourse Debt, Associated With Leveraged Lease Portfolio Based On Counterparty Credit Rating) (Detail) (Energy Holdings [Member], USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Lease Receivables (net of Non-Recourse Debt) $ 663us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet $ 691us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
Standard & Poor's, AA Rating [Member]    
Lease Receivables (net of Non-Recourse Debt) 18us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAARatingMember
/ dei_LegalEntityAxis
= pseg_EnergyHoldingsMember		  
Standard & Poor's, AA- Rating [Member]    
Lease Receivables (net of Non-Recourse Debt) 29us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAAMinusRatingMember
/ dei_LegalEntityAxis
= pseg_EnergyHoldingsMember		  
Standard & Poor's, BBB plus - BBB - Rating [Member]    
Lease Receivables (net of Non-Recourse Debt) 316us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsBBBRatingMember
/ dei_LegalEntityAxis
= pseg_EnergyHoldingsMember		  
Standard & Poor's, BB- Rating [Member]    
Lease Receivables (net of Non-Recourse Debt) 134us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsBBMinusRatingMember
/ dei_LegalEntityAxis
= pseg_EnergyHoldingsMember		  
Standard & Poor's, B- Rating [Member]    
Lease Receivables (net of Non-Recourse Debt) 164us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsBMinusRatingMember
/ dei_LegalEntityAxis
= pseg_EnergyHoldingsMember		  
Standard Poors Not Rated [Member]    
Lease Receivables (net of Non-Recourse Debt) $ 2us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureRentalReceivablesNet
/ us-gaap_CreditRatingStandardPoorsAxis
= pseg_StandardPoorsNotRatedMember
/ dei_LegalEntityAxis
= pseg_EnergyHoldingsMember