Related-Party Transactions (Schedule Of Related Party Transactions, Payables) (Detail) (PSE&G [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
PSE&G [Member]
Related Party Transaction [Line Items]
Payable to Power through BGS and BGSS Contracts	$ (313)	[1]	$ (267)	[1]
Receivable from (Payable to) Services	(66)	[2]	(73)	[2]
Receivable from (Payable to) PSEG	274	[3]	150	[3]
Accounts Receivable (Payable)-Affiliated Companies, net	(105)		(190)
Working Capital Advances to Services	33	[4]	33	[4]
Long-Term Accrued Taxes Receivable (Payable)	$ (116)		$ (72)

[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.

[3] PSEG files a consolidated federal income tax return with its affiliated companies. A tax allocation agreement exists between PSEG and each of its affiliated companies. The general operation of these agreements is that the subsidiary company will compute its taxable income on a stand-alone basis. If the result is a net tax liability, such amount shall be paid to PSEG. If there are net operating losses and/or tax credits, the subsidiary shall receive payment for the tax savings from PSEG to the extent that PSEG is able to utilize those benefits.

[4] PSE&G and Power have advanced working capital to Services. The amounts are included in Other Noncurrent Assets on PSE&G’s and Power’s Consolidated Balance Sheets.