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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
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Concentration Risk [Line Items] |  |
Credit Risk Profile Based on Payment Activity | $ 204 us-gaap_LoansReceivableNet | $ 201 us-gaap_LoansReceivableNet
Commercial/Industrial [Member] |  |
Concentration Risk [Line Items] |  |
Credit Risk Profile Based on Payment Activity | 191 us-gaap_LoansReceivableNet / us-gaap_ConcentrationRiskByTypeAxis = pseg_CommercialIndustrialConcentrationCreditRiskMember / dei_LegalEntityAxis = pseg_PseAndGMember | 188 us-gaap_LoansReceivableNet / us-gaap_ConcentrationRiskByTypeAxis = pseg_CommercialIndustrialConcentrationCreditRiskMember / dei_LegalEntityAxis = pseg_PseAndGMember
Residential [Member] |  |
Concentration Risk [Line Items] |  |
Credit Risk Profile Based on Payment Activity | $ 13 us-gaap_LoansReceivableNet / us-gaap_ConcentrationRiskByTypeAxis = pseg_ResidentialConcentrationCreditRiskMember / dei_LegalEntityAxis = pseg_PseAndGMember | $ 13 us-gaap_LoansReceivableNet / us-gaap_ConcentrationRiskByTypeAxis = pseg_ResidentialConcentrationCreditRiskMember / dei_LegalEntityAxis = pseg_PseAndGMember

X
- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_LoansReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant