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v2.4.1.9

Financial Risk Management Activities (Schedule Of Gross Volume, On Absolute Basis For Derivative Contracts) (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Natural Gas Dth [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 362,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember | 274,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember
Electricity MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 307,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember | 310,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember
FTRs MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 8,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember | 15,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember
Interest Rate Swaps [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 850,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember | 850,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember
PSEG [Member] | Natural Gas Dth [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
PSEG [Member] | Electricity MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
PSEG [Member] | FTRs MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
PSEG [Member] | Interest Rate Swaps [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 850,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 850,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Power [Member] | Natural Gas Dth [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 311,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember / dei_LegalEntityAxis = pseg_PowerMember | 216,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember / dei_LegalEntityAxis = pseg_PowerMember
Power [Member] | Electricity MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 307,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember / dei_LegalEntityAxis = pseg_PowerMember | 310,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember / dei_LegalEntityAxis = pseg_PowerMember
Power [Member] | FTRs MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 8,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember / dei_LegalEntityAxis = pseg_PowerMember | 15,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember / dei_LegalEntityAxis = pseg_PowerMember
Power [Member] | Interest Rate Swaps [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember / dei_LegalEntityAxis = pseg_PowerMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember / dei_LegalEntityAxis = pseg_PowerMember
PSE And G [Member] | Natural Gas Dth [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 51,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember / dei_LegalEntityAxis = pseg_PseAndGMember | 58,000,000 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_NaturalGasDthMember / dei_LegalEntityAxis = pseg_PseAndGMember
PSE And G [Member] | Electricity MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember / dei_LegalEntityAxis = pseg_PseAndGMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_ElectricityMwhMember / dei_LegalEntityAxis = pseg_PseAndGMember
PSE And G [Member] | FTRs MWh [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember / dei_LegalEntityAxis = pseg_PseAndGMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_FtrsMwhMember / dei_LegalEntityAxis = pseg_PseAndGMember
PSE And G [Member] | Interest Rate Swaps [Member] |  |
Derivative [Line Items] |  |
Gross Volume of Derivative on Absolute Value Basis | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember / dei_LegalEntityAxis = pseg_PseAndGMember | 0 us-gaap_UnderlyingDerivative / us-gaap_DerivativeByNatureAxis = pseg_InterestRateSwapsMember / dei_LegalEntityAxis = pseg_PseAndGMember

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