Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Power [Member]
Billings to PSE&G through BGSS	$ 1,294	[1]	$ 1,591	[1]	$ 1,838	[1]
Billings to PSE&G through BGS	921	[1]	1,139	[1]	1,322	[1]
Total Revenue from Affiliates	2,215		2,730		3,160
Administrative Billings from Services	(147)	[2]	(145)	[2]	(153)	[2]
Total Expense Billings from Affiliates	(147)		(145)		(153)
PSE&G [Member]
Billings from Power through BGSS	(1,294)	[1]	(1,591)	[1]	(1,838)	[1]
Billings from Power through BGS	(921)	[1]	(1,139)	[1]	(1,322)	[1]
Administrative Billings from Services	(210)	[2]	(206)	[2]	(240)	[2]
Total Expense Billings from Affiliates	$ (2,425)		$ (2,936)		$ (3,400)

[1] PSE&G has entered into a requirements contract with Power under which Power provides the gas supply services needed to meet PSE&G's BGSS and other contractual requirements through March 31, 2012 and year-to-year thereafter. Power has also entered into contracts to supply energy, capacity and ancillary services to PSE&G through the BGS auction process.

[2] Services provides and bills administrative services to Power and PSE&G at cost. In addition, Power and PSE&G have other payables to Services, including amounts related to certain common costs, such as pension and OPEB costs, which Services pays on behalf of each of the operating companies.