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Financing Receivables (Schedule Of Credit Risk Profile Based On Payment Activity) (Detail) (PSE And G [Member], USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Concentration Risk [Line Items]    
Credit Risk Profile Based on Payment Activity $ 204us-gaap_LoansReceivableNet $ 201us-gaap_LoansReceivableNet
Commercial/Industrial [Member]
    
Concentration Risk [Line Items]    
Credit Risk Profile Based on Payment Activity 191us-gaap_LoansReceivableNet
/ us-gaap_ConcentrationRiskByTypeAxis
= pseg_CommercialIndustrialConcentrationCreditRiskMember
/ dei_LegalEntityAxis
= pseg_PseAndGMember		 188us-gaap_LoansReceivableNet
/ us-gaap_ConcentrationRiskByTypeAxis
= pseg_CommercialIndustrialConcentrationCreditRiskMember
/ dei_LegalEntityAxis
= pseg_PseAndGMember
Residential [Member]
    
Concentration Risk [Line Items]    
Credit Risk Profile Based on Payment Activity $ 13us-gaap_LoansReceivableNet
/ us-gaap_ConcentrationRiskByTypeAxis
= pseg_ResidentialConcentrationCreditRiskMember
/ dei_LegalEntityAxis
= pseg_PseAndGMember		 $ 13us-gaap_LoansReceivableNet
/ us-gaap_ConcentrationRiskByTypeAxis
= pseg_ResidentialConcentrationCreditRiskMember
/ dei_LegalEntityAxis
= pseg_PseAndGMember