Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
PSE And G [Member]
Related Party Transaction [Line Items]
Billings from Power through BGS and BGSS	[1]	$ 297	$ 297	$ 993		$ 1,028
Administrative Billings from Services	[2]	65	64	131		124
Total Billings from Affiliates		362	361	1,124		1,152
Power [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		297	297	993	[1]	1,028	[1]
Administrative Billings from Services		$ 46	$ 46	$ 91	[2]	$ 88	[2]

[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 PSE&G and Power at cost. In addition, PSE&G and Power 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.