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Other Income And Deductions (Schedule Of Other Income) (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Component of Other Income [Line Items] |  |  |  |
NDT Fund Gains, Interest, Dividend and Other Income | $ 29 pseg_NdtFundsGainsInterestDividendAndOtherIncome |  | $ 32 pseg_NdtFundsGainsInterestDividendAndOtherIncome |
Allowance for Funds Used During Construction | 10 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity |  | 6 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity |
Solar Loan Interest | 6 pseg_SolarLoanInterest |  | 6 pseg_SolarLoanInterest |
Other | 3 pseg_OtherNonoperatingIncomeOther |  | 4 pseg_OtherNonoperatingIncomeOther |
Total Other Income | 48 us-gaap_OtherNonoperatingIncome |  | 48 us-gaap_OtherNonoperatingIncome |
PSE And G [Member] |  |  |  |
Component of Other Income [Line Items] |  |  |  |
NDT Fund Gains, Interest, Dividend and Other Income | 0 pseg_NdtFundsGainsInterestDividendAndOtherIncome / dei_LegalEntityAxis = pseg_PseAndGMember |  | 0 pseg_NdtFundsGainsInterestDividendAndOtherIncome / dei_LegalEntityAxis = pseg_PseAndGMember |
Allowance for Funds Used During Construction | 10 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity / dei_LegalEntityAxis = pseg_PseAndGMember |  | 6 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity / dei_LegalEntityAxis = pseg_PseAndGMember |
Solar Loan Interest | 6 pseg_SolarLoanInterest / dei_LegalEntityAxis = pseg_PseAndGMember |  | 6 pseg_SolarLoanInterest / dei_LegalEntityAxis = pseg_PseAndGMember |
Other | 2 pseg_OtherNonoperatingIncomeOther / dei_LegalEntityAxis = pseg_PseAndGMember |  | 2 pseg_OtherNonoperatingIncomeOther / dei_LegalEntityAxis = pseg_PseAndGMember |
Total Other Income | 18 us-gaap_OtherNonoperatingIncome / dei_LegalEntityAxis = pseg_PseAndGMember |  | 14 us-gaap_OtherNonoperatingIncome / dei_LegalEntityAxis = pseg_PseAndGMember |
Power [Member] |  |  |  |
Component of Other Income [Line Items] |  |  |  |
NDT Fund Gains, Interest, Dividend and Other Income | 29 pseg_NdtFundsGainsInterestDividendAndOtherIncome / dei_LegalEntityAxis = pseg_PowerMember |  | 32 pseg_NdtFundsGainsInterestDividendAndOtherIncome / dei_LegalEntityAxis = pseg_PowerMember |
Allowance for Funds Used During Construction | 0 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity / dei_LegalEntityAxis = pseg_PowerMember |  | 0 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity / dei_LegalEntityAxis = pseg_PowerMember |
Solar Loan Interest | 0 pseg_SolarLoanInterest / dei_LegalEntityAxis = pseg_PowerMember |  | 0 pseg_SolarLoanInterest / dei_LegalEntityAxis = pseg_PowerMember |
Other | 0 pseg_OtherNonoperatingIncomeOther / dei_LegalEntityAxis = pseg_PowerMember |  | 1 pseg_OtherNonoperatingIncomeOther / dei_LegalEntityAxis = pseg_PowerMember |
Total Other Income | 29 us-gaap_OtherNonoperatingIncome / dei_LegalEntityAxis = pseg_PowerMember |  | 33 us-gaap_OtherNonoperatingIncome / dei_LegalEntityAxis = pseg_PowerMember |
Other Entities [Member] |  |  |  |
Component of Other Income [Line Items] |  |  |  |
NDT Fund Gains, Interest, Dividend and Other Income | 0 pseg_NdtFundsGainsInterestDividendAndOtherIncome / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | 0 pseg_NdtFundsGainsInterestDividendAndOtherIncome / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
Allowance for Funds Used During Construction | 0 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | 0 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
Solar Loan Interest | 0 pseg_SolarLoanInterest / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | 0 pseg_SolarLoanInterest / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
Other | 1 pseg_OtherNonoperatingIncomeOther / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | 1 pseg_OtherNonoperatingIncomeOther / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
Total Other Income | $ 1 us-gaap_OtherNonoperatingIncome / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | $ 1 us-gaap_OtherNonoperatingIncome / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
[1] | Other primarily consists of activity at PSEG (as parent company), Energy Holdings, Services and intercompany eliminations.

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