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Schedule Of Consolidated Debt (Long-Term Debt Financing Transactions) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Long-term Debt $ 13,158  
PSEG [Member]    
Debt Instrument [Line Items]    
Long-term Debt 2,100 $ 1,200
PSEG [Member] | Senior Notes One Point Six Zero Percent Due In Two Thousand Nineteen [Member]    
Debt Instrument [Line Items]    
Long-term Debt 700 0
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
Debt Instrument, Face Amount $ 700  
Stated interest rate of debt instrument 2.65%  
PSEG [Member] | Term Loan maturing in 2017 [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 0 500
Repayments of Long-term Debt 500  
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
Debt Instrument, Face Amount $ 425  
Stated interest rate of debt instrument 3.00%  
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
Debt Instrument, Face Amount $ 350  
Stated interest rate of debt instrument 3.60%  
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%  
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%  
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%  
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%  
Power [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 2,400 2,400
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%  
[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.