XML 54 R62.htm IDEA: XBRL DOCUMENT v2.4.1.9
Changes In Capitalization (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Long-term Debt $ 9,084us-gaap_LongTermDebt   $ 9,144us-gaap_LongTermDebt
PSE And G [Member]      
Contributed Capital 0us-gaap_ProceedsFromContributedCapital
/ dei_LegalEntityAxis
= pseg_PseAndGMember		 175us-gaap_ProceedsFromContributedCapital
/ dei_LegalEntityAxis
= pseg_PseAndGMember		  
Power [Member]      
Cash Dividends Paid to Parent Company 200us-gaap_CashDividendsPaidToParentCompany
/ dei_LegalEntityAxis
= pseg_PowerMember		    
Securitization Debt [Member] | PSE And G [Member]      
Repayments of Long-term Debt $ 58us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= pseg_TransitionFundingsSecuritizationDebtMember
/ dei_LegalEntityAxis
= pseg_PseAndGMember