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Schedule Of Consolidated Debt (Short-Term Liquidity) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Short-term Debt [Line Items]  
Usage $ 219us-gaap_LineOfCredit
Available Liquidity 4,081us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity 4,300us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Commitments of single institution as percentage of total commitments 8.00%pseg_CommitmentsOfSingleInstitutionAsPercentageOfTotalCommitments
PSEG [Member]  
Short-term Debt [Line Items]  
Usage 8us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Available Liquidity 992us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Line of Credit Facility, Maximum Borrowing Capacity 1,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Power [Member]  
Short-term Debt [Line Items]  
Usage 197us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= pseg_PowerMember
Available Liquidity 2,503us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
Line of Credit Facility, Maximum Borrowing Capacity 2,700us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
PSE&G [Member]  
Short-term Debt [Line Items]  
Usage 14us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= pseg_PseAndGMember
Available Liquidity 586us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PseAndGMember
Line of Credit Facility, Maximum Borrowing Capacity 600us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PseAndGMember
5-year Credit Facility, April 2019 [Member]  
Short-term Debt [Line Items]  
Line of Credit Facility, Maximum Borrowing Capacity 2,100us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
5-year Credit Facility, April 2019 [Member] | PSEG [Member]  
Short-term Debt [Line Items]  
Usage 8us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
Available Liquidity 492us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
Line of Credit Facility, Maximum Borrowing Capacity 500us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
Expiration Date Apr 2019
5-year Credit Facility, April 2019 [Member] | Power [Member]  
Short-term Debt [Line Items]  
Usage 97us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
Available Liquidity 1,503us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
Line of Credit Facility, Maximum Borrowing Capacity 1,600us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonApril2019Member
Expiration Date Apr 2019
Five Year Credit Facility Maturing on March 2018 [Member] | PSEG [Member]  
Short-term Debt [Line Items]  
Usage 0us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
Available Liquidity 500us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
Line of Credit Facility, Maximum Borrowing Capacity 500us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
[1]
Expiration Date Mar 2018
Credit Facility Reduction in April 2016 23pseg_CreditFacilityReductioninApril2016
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
[2]
Five Year Credit Facility Maturing on March 2018 [Member] | Power [Member]  
Short-term Debt [Line Items]  
Usage 0us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
Available Liquidity 1,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
Line of Credit Facility, Maximum Borrowing Capacity 1,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
[2]
Expiration Date Mar 2018
Credit Facility Reduction in April 2016 29pseg_CreditFacilityReductioninApril2016
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
[2]
Five Year Credit Facility Maturing on March 2018 [Member] | PSE&G [Member]  
Short-term Debt [Line Items]  
Usage 14us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= pseg_PseAndGMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
Available Liquidity 586us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PseAndGMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
Line of Credit Facility, Maximum Borrowing Capacity 600us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PseAndGMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
[3]
Expiration Date Mar 2018
Credit Facility Reduction in April 2016 48pseg_CreditFacilityReductioninApril2016
/ dei_LegalEntityAxis
= pseg_PseAndGMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_FiveYearCreditFacilityMaturingonMarch2018Member
[2]
Bilateral Credit Facility [Member] | Power [Member]  
Short-term Debt [Line Items]  
Usage 100us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_BilateralCreditFacilityMember
Available Liquidity 0us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_BilateralCreditFacilityMember
Line of Credit Facility, Maximum Borrowing Capacity $ 100us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= pseg_PowerMember
/ us-gaap_ShortTermDebtTypeAxis
= pseg_BilateralCreditFacilityMember
Expiration Date Sept 2015
[1] In April 2016, this facility will be reduced by $23 million.
[2] In April 2016, this facility will be reduced by $29 million.
[3] In April 2016, this facility will be reduced by $48 million.