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Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance For Doubtful Accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 52 $ 56 $ 56
Additions, Charged to cost and expenses 101 86 90
Additions, Charged to other accounts-describe 0 0 0
Deductions-describe [1] 86 90 90
Balance at End of Period 67 52 56
Materials And Supplies Valuation Reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 15 8 22
Additions, Charged to cost and expenses 2 9 2
Additions, Charged to other accounts-describe 0 0 0
Deductions-describe 6 2 [2] 16 [2]
Balance at End of Period 11 15 8
PSE&G [Member] | Allowance For Doubtful Accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 52 56 56
Additions, Charged to cost and expenses 101 86 90
Additions, Charged to other accounts-describe 0 0 0
Deductions-describe [3] 86 90 90
Balance at End of Period 67 52 56
PSE&G [Member] | Materials And Supplies Valuation Reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 2 0  
Additions, Charged to cost and expenses 0 2  
Additions, Charged to other accounts-describe 0 0  
Deductions-describe 1 0  
Balance at End of Period 1 2 0
Power [Member] | Materials And Supplies Valuation Reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 13 8 22
Additions, Charged to cost and expenses 2 7 2
Additions, Charged to other accounts-describe 0 0 0
Deductions-describe 5 2 [4] 16 [4]
Balance at End of Period $ 10 $ 13 $ 8
[1] Accounts Receivable written off.
[2] Reduced reserve to appropriate level and to remove obsolete inventory.
[3] Accounts Receivable written off.
[4] Reduced reserve to appropriate level and to remove obsolete inventory.