Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Power [Member]
Billings From Power through BGSS	$ 128	[1]	$ 112	[1]	$ 606	[1]	$ 563	[1]
Billings From Power through BGS	192	[1]	192	[1]	385	[1]	381	[1]
Total Revenue from Affiliates	320		304		991		944
Administrative Billings from Services	(43)	[2]	(38)	[2]	88	[2]	72	[2]
Total Expense Billings from Affiliates	(43)		(38)		(88)		(72)
PSE And G [Member]
Billings From Power through BGSS	(128)	[1]	(112)	[1]	(606)	[1]	(563)	[1]
Billings From Power through BGS	(192)	[1]	(192)	[1]	(385)	[1]	(381)	[1]
Administrative Billings from Services	(62)	[2]	(57)	[2]	(123)	[2]	(107)	[2]
Total Expense Billings from Affiliates	$ (382)		$ (361)		$ (1,114)		$ (1,051)

[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.