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Pension, OPEB and Savings Plans (Schedule Of Percentage Of Fair Value Of Total Plan Assets) (Details)
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 71.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember		 73.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
Fixed Income Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 26.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember		 25.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
Other Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 3.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_OtherInvestmentsMember		 2.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_OtherInvestmentsMember
Long Island Electric Utility Servco LLC Pension and OPEB [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_PlanNameAxis
= pseg_LongIslandElectricUtilityServcoLLCPensionandOPEBMember		  
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 70.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_PlanNameAxis
= pseg_LongIslandElectricUtilityServcoLLCPensionandOPEBMember		  
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Fixed Income Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 29.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_PlanNameAxis
= pseg_LongIslandElectricUtilityServcoLLCPensionandOPEBMember		  
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Other Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual plan asset allocation, percent 1.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_OtherInvestmentsMember
/ us-gaap_PlanNameAxis
= pseg_LongIslandElectricUtilityServcoLLCPensionandOPEBMember