Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Power [Member]
Billings to PSE&G through BGSS	$ 451	[1]	$ 698	[1]
Billings to PSE&G through BGS	189	[1]	233	[1]
Total Revenue from Affiliates	640		931
Administrative Billings from Services	(34)	[2]	(37)	[2]
Total Expense Billings from Affiliates	(34)		(37)
PSE And G [Member]
Billings From Power through BGSS	(451)	[1]	(698)	[1]
Billings From Power through BGS	(189)	[1]	(233)	[1]
Administrative Billings from Services	(50)	[2]	(51)	[2]
Total Expense Billings from Affiliates	$ (690)		$ (982)

[1] PSE&G has entered into a requirements contract with Power under which Power provided the gas supply services needed to meet PSE&G's BGSS and other contractual requirements through March 31, 2012 and continues subsequently on a year-to-year basis. 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.