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Other Income And Deductions (Schedule Of Other Deductions) (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Component of Other Deductions [Line Items] |  |  |  |
NDT Fund Realized Losses and Expenses | $ 11 pseg_NdtFundsLossesAndExpenses |  | $ 6 pseg_NdtFundsLossesAndExpenses |
Other | 1 pseg_OtherNonoperatingExpenseOther |  | 6 pseg_OtherNonoperatingExpenseOther |
Total Other Deductions | 12 us-gaap_OtherNonoperatingExpense |  | 12 us-gaap_OtherNonoperatingExpense |
PSE And G [Member] |  |  |  |
Component of Other Deductions [Line Items] |  |  |  |
NDT Fund Realized Losses and Expenses | 0 pseg_NdtFundsLossesAndExpenses / dei_LegalEntityAxis = pseg_PseAndGMember |  | 0 pseg_NdtFundsLossesAndExpenses / dei_LegalEntityAxis = pseg_PseAndGMember |
Other | 1 pseg_OtherNonoperatingExpenseOther / dei_LegalEntityAxis = pseg_PseAndGMember |  | 0 pseg_OtherNonoperatingExpenseOther / dei_LegalEntityAxis = pseg_PseAndGMember |
Total Other Deductions | 1 us-gaap_OtherNonoperatingExpense / dei_LegalEntityAxis = pseg_PseAndGMember |  | 0 us-gaap_OtherNonoperatingExpense / dei_LegalEntityAxis = pseg_PseAndGMember |
Power [Member] |  |  |  |
Component of Other Deductions [Line Items] |  |  |  |
NDT Fund Realized Losses and Expenses | 11 pseg_NdtFundsLossesAndExpenses / dei_LegalEntityAxis = pseg_PowerMember |  | 6 pseg_NdtFundsLossesAndExpenses / dei_LegalEntityAxis = pseg_PowerMember |
Other | 0 pseg_OtherNonoperatingExpenseOther / dei_LegalEntityAxis = pseg_PowerMember |  | 4 pseg_OtherNonoperatingExpenseOther / dei_LegalEntityAxis = pseg_PowerMember |
Total Other Deductions | 11 us-gaap_OtherNonoperatingExpense / dei_LegalEntityAxis = pseg_PowerMember |  | 10 us-gaap_OtherNonoperatingExpense / dei_LegalEntityAxis = pseg_PowerMember |
Other Entities [Member] |  |  |  |
Component of Other Deductions [Line Items] |  |  |  |
NDT Fund Realized Losses and Expenses | 0 pseg_NdtFundsLossesAndExpenses / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | 0 pseg_NdtFundsLossesAndExpenses / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
Other | 0 pseg_OtherNonoperatingExpenseOther / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | 2 pseg_OtherNonoperatingExpenseOther / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1]
Total Other Deductions | $ 0 us-gaap_OtherNonoperatingExpense / dei_LegalEntityAxis = pseg_OtherEntitiesMember | [1] | $ 2 us-gaap_OtherNonoperatingExpense / 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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