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Schedule Of Consolidated Debt (Long-Term Debt) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Long-term Debt $ 13,158  
Long-term Debt, Current Maturities (1,000) $ (500)
Total Long-Term Debt 12,068 10,895
PSEG [Member]    
Debt Instrument [Line Items]    
Long-term Debt 2,100 1,200
Long-term Debt, Current Maturities 0 (500)
Net Unamortized Discount and Debt Issuance Costs (9) (5)
Total Long-Term Debt 2,091 695
PSEG [Member] | Term Loan maturing in 2017 [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 0 500
Maturity Year 2017  
PSEG [Member] | Term Loan maturing in 2019 [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 700 0
Maturity Year 2019  
PSEG [Member] | Variable Rate Term Loan due 2017 [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 700 500
PSEG [Member] | Senior Notes One Point Six Zero Percent Due In Two Thousand Nineteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 400 400
Stated interest rate of debt instrument 1.60%  
Maturity Year 2019  
PSEG [Member] | Senior Notes Two Point Zero Percent Due In Two Thousand Twenty One [Member] [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 300 300
Stated interest rate of debt instrument 2.00%  
Maturity Year 2021  
PSEG [Member] | Senior Notes Two Point Six Five Percent Due In Two Thousand Twenty Two [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 700 0
Stated interest rate of debt instrument 2.65%  
Maturity Year 2022  
PSEG [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 1,400 700
Power [Member]    
Debt Instrument [Line Items]    
Long-term Debt 2,400 2,400
Long-term Debt, Current Maturities (250) 0
Net Unamortized Discount and Debt Issuance Costs (14) (18)
Total Long-Term Debt 2,136 2,382
Power [Member] | Senior Notes Two Point Four Five Percentage Due Two Thousand Eighteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 250 250
Stated interest rate of debt instrument 2.45%  
Maturity Year 2018  
Power [Member] | Senior Notes Five Point One Three Percentage Due Two Thousand Twenty [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 406 406
Stated interest rate of debt instrument 5.13%  
Maturity Year 2020  
Power [Member] | Senior Notes Four Point One Five Percentage Due Two Thousand Twenty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 250 250
Stated interest rate of debt instrument 4.15%  
Maturity Year 2021  
Power [Member] | Senior Notes Three Point Zero Percent Due In Two Thousand Twenty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 700 700
Stated interest rate of debt instrument 3.00%  
Maturity Year 2021  
Power [Member] | Senior Notes Four Point Three Percent Due Two Thousand Twenty Three [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 250 250
Stated interest rate of debt instrument 4.30%  
Maturity Year 2023  
Power [Member] | Senior Notes Eight Point Six Three Percent Due Two Thousand Thirty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 500 500
Stated interest rate of debt instrument 8.63%  
Maturity Year 2031  
Power [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 2,356 2,356
Power [Member] | Pollution Control Notes Floating Rate Due On Two Thousand Nineteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 44 44
Maturity Year [1] 2019  
Power [Member] | Pollution Control Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 44 44
PSE&G [Member]    
Debt Instrument [Line Items]    
Long-term Debt, Current Maturities (750) 0
Total Long-Term Debt 7,841 7,818
PSE&G [Member] | First And Refunding Mortgage Bonds Nine Point Two Five Percentage Due On Two Twenty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 134 134
Stated interest rate of debt instrument 9.25%  
Maturity Year [2] 2021  
PSE&G [Member] | First And Refunding Mortgage Bonds Eight Point Zero Zero Percentage Due On Two Thirty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 7 7
Stated interest rate of debt instrument 8.00%  
Maturity Year [2] 2037  
PSE&G [Member] | First And Refunding Mortgage Bonds Five Point Zero Zero Percentage Due On Two Thirty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 8 8
Stated interest rate of debt instrument 5.00%  
Maturity Year [2] 2037  
PSE&G [Member] | First And Refunding Mortgage Bonds [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 149 149
PSE&G [Member] | Medium Term Notes Five Point Three Zero Percentage Due On Two Thousand Eighteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 400 400
Stated interest rate of debt instrument 5.30%  
Maturity Year [2] 2018  
PSE&G [Member] | Medium Term Notes Two Point Three Zero Percent Due In Two Thousand Eighteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 350 350
Stated interest rate of debt instrument 2.30%  
Maturity Year [2] 2018  
PSE&G [Member] | Medium Term Notes One Point Eight Percent Due In Two Thousand Nineteen [Member] [Domain]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 1.80%  
Maturity Year [2] 2019  
PSE&G [Member] | Medium Term Notes Two Point Zero Percent Due In Two Thousand Nineteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 2.00%  
Maturity Year [2] 2019  
PSE&G [Member] | Medium Term Notes Seven Point Zero Four Percentage Due On Two Thousand Twenty [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 9 9
Stated interest rate of debt instrument 7.04%  
Maturity Year [2] 2020  
PSE&G [Member] | Medium Term Notes Three Point Five Zero Percentage Due On Two Thousand Twenty [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 3.50%  
Maturity Year [2] 2020  
PSE&G [Member] | Medium Term Notes One Point Nine Zero Percent Due In Two Thousand Twenty One [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 300 300
Stated interest rate of debt instrument 1.90%  
Maturity Year [2] 2021  
PSE&G [Member] | Medium Term Notes Two Point Three Eight Percent Due In Two Thousand Twenty Three [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 500 500
Stated interest rate of debt instrument 2.375%  
Maturity Year [2] 2023  
PSE&G [Member] | Medium Term Notes Three Point Seven Five Percent Due In Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 3.75%  
Maturity Year [2] 2024  
PSE&G [Member] | Medium Term Notes Three Point One Five Percent Due In Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 3.15%  
Maturity Year [2] 2024  
PSE&G [Member] | Medium Term Notes Three Point Zero Five Percent Due In Two Thousand Twenty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 3.05%  
Maturity Year [2] 2024  
PSE&G [Member] | Medium Term Notes Three Point Zero Percent Due In Two Thousand Twenty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 350 350
Stated interest rate of debt instrument 3.00%  
Maturity Year [2] 2025  
PSE&G [Member] | Medium Term Notes Two Point Two Five Percent due Two Thousand Twenty Six [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 425 425
Stated interest rate of debt instrument 2.25%  
Maturity Year [2] 2026  
PSE&G [Member] | Medium Term Notes Three Point Zero Percent due Two Thousand Twenty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 425 0
Stated interest rate of debt instrument 3.00%  
Maturity Year [1] 2027  
PSE&G [Member] | Medium Term Notes Five Point Two Five Percentage Due On Two Thousand Thirty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 5.25%  
Maturity Year [2] 2035  
PSE&G [Member] | Medium Term Notes Five Point Seven Zero Percentage Due On Two Thousand Thirty Six [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 5.70%  
Maturity Year [2] 2036  
PSE&G [Member] | Medium Term Notes Five Point Eight Zero Percentage Due On Two Thousand Thirty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 350 350
Stated interest rate of debt instrument 5.80%  
Maturity Year [2] 2037  
PSE&G [Member] | Medium Term Notes Five Point Three Eight Percentage Due On Two Thousand Thirty Nine [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 5.38%  
Maturity Year [2] 2039  
PSE&G [Member] | Medium Term Notes Five Point Five Zero Percentage Due On Two Thousand Forty [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 300 300
Stated interest rate of debt instrument 5.50%  
Maturity Year [2] 2040  
PSE&G [Member] | Medium-Term Notes 3.95% Due On 2042 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 450 450
Stated interest rate of debt instrument 3.95%  
Maturity Year [2] 2042  
PSE&G [Member] | Medium-Term Notes 3.65% Due On 2042 [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 350 350
Stated interest rate of debt instrument 3.65%  
Maturity Year [2] 2042  
PSE&G [Member] | Medium Term Notes Three Point Eight Zero Percent Due In Two Thousand Forty Three [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 400 400
Stated interest rate of debt instrument 3.80%  
Maturity Year [2] 2043  
PSE&G [Member] | Medium Term Notes Four Point Zero Percent Due In Two Thousand Forty Four [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 4.00%  
Maturity Year [2] 2044  
PSE&G [Member] | Medium Term Notes Four Point Zero Five Percent due Two Thousand Forty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250  
Stated interest rate of debt instrument 4.05%  
Maturity Year [2] 2045  
PSE&G [Member] | Medium Term Notes Four Point One Five Percent Due In Two Thousand Forty Five [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 250 250
Stated interest rate of debt instrument 4.15%  
Maturity Year [2] 2045  
PSE&G [Member] | Medium Term Notes Three Point Eight Zero Percent due Two Thousand Forty Six [Member]    
Debt Instrument [Line Items]    
Long-term Debt [2] $ 550 550
Stated interest rate of debt instrument 3.80%  
Maturity Year [2] 2046  
PSE&G [Member] | Medium Term Notes Three Point Six Zero Percent due Two Thousand Forty Seven [Member]    
Debt Instrument [Line Items]    
Long-term Debt [1] $ 350 0
Stated interest rate of debt instrument 3.60%  
Maturity Year [1] 2047  
PSE&G [Member] | Total Medium Term Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 8,509 7,734
PSE&G Excluding Transition Funding and Transition Funding II [Member]    
Debt Instrument [Line Items]    
Long-term Debt 8,658 7,883
Long-term Debt, Current Maturities (750) 0
Net Unamortized Discount and Debt Issuance Costs (67) (65)
Total Long-Term Debt $ 7,841 $ 7,818
[1] The Pennsylvania Economic Development Authority (PEDFA) bond that is serviced and secured by Power Pollution Control Notes, is a variable rate bond that is in weekly reset mode.
[2] Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.