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Income Taxes (Interest And Penalties Related To Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]      
Accumulated Interest and Penalties on Uncertain Tax Positions $ 59 $ 66 $ 69
PSE&G [Member]      
Income Taxes [Line Items]      
Accumulated Interest and Penalties on Uncertain Tax Positions 22 20 15
Power [Member]      
Income Taxes [Line Items]      
Accumulated Interest and Penalties on Uncertain Tax Positions 17 6 9
Energy Holdings [Member]      
Income Taxes [Line Items]      
Accumulated Interest and Penalties on Uncertain Tax Positions $ 20 $ 40 $ 45