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Consolidated Statements Of Stockholders' Equity (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other Comprehensive Income (Loss), tax $ (40) $ (34)   $ 23
PSE&G [Member]        
Other Comprehensive Income (Loss), tax 0 0 $ 0  
Power [Member]        
Other Comprehensive Income (Loss), tax $ (32) $ 23   $ 121