Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Power [Member]
Billings From Power through BGSS	$ 280		$ 284		$ 1,308	[1]	$ 1,275	[1]
Administrative Billings from Services	(41)	[2]	(43)	[2]	(129)	[2]	(131)	[2]
PSE And G [Member]
Billings To Affiliate Through Bgss	(280)		(284)		(1,308)	[1]	(1,275)	[1]
Administrative Billings from Services	(59)	[2]	(61)	[2]	(183)	[2]	(184)	[2]
Total Expense Billings from Affiliates	$ (339)		$ (345)		$ (1,491)		$ (1,459)

[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.