Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
PSE And G [Member]
Related Party Transaction [Line Items]
Billings from Power through BGS and BGSS	[1]	$ 294	$ 280	$ 1,287		$ 1,308
Administrative Billings from Services	[2]	66	59	197		183
Total Billings from Affiliates		360	339	1,484		1,491
Power [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		294	280	1,287	[1]	1,308	[1]
Administrative Billings from Services		$ 44	$ 41	$ 135	[2]	$ 129	[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.