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Income Taxes (Possible Decrease In Total Unrecognized Tax Benefits Including Interest) (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Income Taxes [Line Items]  
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months $ 14
Power [Member]  
Income Taxes [Line Items]  
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months 3
PSE&G [Member]  
Income Taxes [Line Items]  
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months $ 7