Regulatory Assets And Liabilities (Significant 2012 Orders and Pending Filings) (Details) (PSE&G [Member], USD $) In Millions, unless otherwise specified					12 Months Ended					12 Months Ended				3 Months Ended
	Dec. 11, 2012	Oct. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Electric [Member]	Dec. 19, 2012 Electric [Member]	Nov. 30, 2012 Electric [Member]	Jul. 18, 2012 Electric [Member]	Jul. 31, 2011 Electric [Member]	Dec. 31, 2012 Gas [Member]	Dec. 19, 2012 Gas [Member]	Nov. 30, 2012 Gas [Member]	Jul. 31, 2011 Gas [Member]	Dec. 31, 2012 Universal Service Fund [Member]	Dec. 31, 2012 Universal Service Fund [Member] Electric [Member]	Dec. 31, 2012 Universal Service Fund [Member] Gas [Member]	Dec. 31, 2012 Lifeline [Member]	Dec. 31, 2012 Lifeline [Member] Electric [Member]	Dec. 31, 2012 Lifeline [Member] Gas [Member]
Regulatory Assets And Liabilities [Line Items]
Request for increased transmission revenues		$ 174		$ 94
USF and LIfeline recovery														230	173	57	66	46	20
SBC/NGC Rate request					5					29
SBC/NGC Rate request update					77
Request for decreased RAC revenues							9					10
Request for WNC deficiency revenues recovery			41
Request for WNC carryover deficiency revenues recovery			16
Supplemental request for WNC carryover deficiency revenues recovery	24
Request for increased RRC revenues									62				8
Increase of accelerated investment from capital infrastructure programs						40					23
Authorized increase in rates per SPRC filing								3
Request for increase in rates from SPRC									$ 17