Related-Party Transactions (Schedule Of Related Party Transactions, Receivables) (Detail) (Power [Member], USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Power [Member]
Receivables from PSE&G through BGS and BGSS Contracts	$ 102	[1]	$ 247	[1]
Receivables from PSE&G Related to Gas Supply Hedges for BGSS	66	[1]	109	[1]
Receivable from (Payable to) Services	(24)	[2]	(26)	[2]
Tax Receivable from (Payable to) PSEG	121	[3]	58	[3]
Receivable from (Payable to) PSEG	0		(7)
Accounts Receivable-Affiliated Companies, net	265		381
Short-Term Loan to Affiliate (Demand Note to PSEG)	737	[4]	907	[4]
Working Capital Advances to Services	17	[5]	17	[5]
Long-Term Accrued Taxes Receivable (Payable)	$ (53)	[3]	$ (8)	[3]

[1] PSE&G has entered into a requirements contract with Power under which Power provided the gas supply services needed to meet PSE&G's BGSS and other contractual requirements through March 31, 2012 and continues on a year-to-year basis thereafter. 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.

[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] Power's short-term loans with PSEG are for working capital and other short-term needs. Interest Income and Interest Expense relating to these short-term funding activities were immaterial.

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