Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Power [Member]
Billings From Power through BGSS	$ 297		$ 320		$ 1,028	[1]	$ 991	[1]
Administrative Billings from Services	(46)	[2]	(43)	[2]	(88)	[2]	(88)	[2]
PSE And G [Member]
Billings To Affiliate Through Bgss	(297)		(320)		(1,028)	[1]	(991)	[1]
Administrative Billings from Services	(64)	[2]	(62)	[2]	(124)	[2]	(123)	[2]
Total Expense Billings from Affiliates	$ (361)		$ (382)		$ (1,152)		$ (1,114)

[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. 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.