Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Schedule Of Excise And Gross Receipts Tax Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Revenues	$ 2,406	$ 2,402	$ 2,098	$ 2,875	$ 2,636	$ 2,620	$ 2,469	$ 3,354	$ 9,781	$ 11,079	$ 11,793
PSE&G [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Revenues	1,597	1,683	1,407	1,939	1,608	1,841	1,571	2,306	6,626	7,326	7,869
TEFA And GRT [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Revenues									108	146	149
Taxes Other Than Income Taxes	$ 98				$ 133				$ 98	$ 133	$ 136