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Consolidated Statements Of Stockholders' Equity (Parenthetical) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Other Comprehensive Income (Loss), tax $ 138us-gaap_OtherComprehensiveIncomeLossTax $ (219)us-gaap_OtherComprehensiveIncomeLossTax $ 26us-gaap_OtherComprehensiveIncomeLossTax
PSE&G [Member]      
Other Comprehensive Income (Loss), tax 0us-gaap_OtherComprehensiveIncomeLossTax
/ dei_LegalEntityAxis
= pseg_PseAndGMember		 1us-gaap_OtherComprehensiveIncomeLossTax
/ dei_LegalEntityAxis
= pseg_PseAndGMember		 0us-gaap_OtherComprehensiveIncomeLossTax
/ dei_LegalEntityAxis
= pseg_PseAndGMember
Power [Member]      
Other Comprehensive Income (Loss), tax $ 121us-gaap_OtherComprehensiveIncomeLossTax
/ dei_LegalEntityAxis
= pseg_PowerMember		 $ (199)us-gaap_OtherComprehensiveIncomeLossTax
/ dei_LegalEntityAxis
= pseg_PowerMember		 $ 26us-gaap_OtherComprehensiveIncomeLossTax
/ dei_LegalEntityAxis
= pseg_PowerMember