Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Power [Member]
Related Party Transaction [Line Items]
Billings to PSE&G through BGSS	$ 91	[1]	$ 118	[1]	$ 958	[1]	$ 1,102	[1]
Billings to PSE&G through BGS	272	[1]	345	[1]	734	[1]	904	[1]
Total Revenue from Affiliates	363		463		1,692		2,006
Administrative Billings from Services	(37)	[2]	(34)	[2]	(109)	[2]	(106)	[2]
Total Expense Billings from Affiliates	(37)		(34)		(109)		(106)
PSE&G [Member]
Related Party Transaction [Line Items]
Billings from Power through BGSS	(91)	[1]	(118)	[1]	(958)	[1]	(1,102)	[1]
Billings from Power through BGS	(272)	[1]	(345)	[1]	(734)	[1]	(904)	[1]
Administrative Billings from Services	(53)	[2]	(47)	[2]	(154)	[2]	(151)	[2]
Total Expense Billings from Affiliates	$ (416)		$ (510)		$ (1,846)		$ (2,157)

[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.