Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Power [Member]
Billings to PSE&G through BGSS	$ 169	[1]	$ 166	[1]	$ 867	[1]	$ 984	[1]
Billings to PSE&G through BGS	229	[1]	286	[1]	462	[1]	559	[1]
Total Revenue from Affiliates	398		452		1,329		1,543
Administrative Billings from Services	(35)	[2]	(36)	[2]	(72)	[2]	(72)	[2]
Total Expense Billings from Affiliates	(35)		(36)		(72)		(72)
PSE&G [Member]
Billings from Power through BGSS	(169)	[1]	(166)	[1]	(867)	[1]	(984)	[1]
Billings from Power through BGS	(229)	[1]	(286)	[1]	(462)	[1]	(559)	[1]
Administrative Billings from Services	(50)	[2]	(54)	[2]	(101)	[2]	(104)	[2]
Total Expense Billings from Affiliates	$ (448)		$ (506)		$ (1,430)		$ (1,647)

[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.