Related-Party Transactions (Schedule Of Related Party Transactions, Revenue) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Power [Member]
Related Party Transaction [Line Items]
Administrative Billings from Services	$ 165	[1]	$ 178	[1]	$ 154	[1]
PSE&G [Member]
Related Party Transaction [Line Items]
Billings from Power through BGSS and BGS	1,771	[2]	1,797	[2]	1,802	[2]
Administrative Billings from Services	248	[1]	255	[1]	230	[1]
Total Expense Billings from Affiliates	$ 2,019		$ 2,052		$ 2,032

[1] 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.

[2] 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.