Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Component of Other Income (Deductions) [Line Items]    
NDT Fund Interest and Dividends $ 12 $ 10
Allowance for Funds Used During Construction 14 14
Solar Loan Interest 4 5
Other 2 3
Other Income (Deductions) 32 32
PSE And G [Member]    
Component of Other Income (Deductions) [Line Items]    
NDT Fund Interest and Dividends 0 0
Allowance for Funds Used During Construction 14 14
Solar Loan Interest 4 5
Other 2 3
Other Income (Deductions) 20 22
Power [Member]    
Component of Other Income (Deductions) [Line Items]    
NDT Fund Interest and Dividends 12 10
Allowance for Funds Used During Construction 0 0
Solar Loan Interest 0 0
Other (1) 1
Other Income (Deductions) 11 11
Other Entities [Member]    
Component of Other Income (Deductions) [Line Items]    
NDT Fund Interest and Dividends [1] 0 0
Allowance for Funds Used During Construction [1] 0 0
Solar Loan Interest [1] 0 0
Other [1] 1 (1)
Other Income (Deductions) [1] $ 1 $ (1)
[1] Other consists of activity at PSEG (as parent company), Energy Holdings, Services, PSEG LI and intercompany eliminations.