Related-Party Transactions (Schedule Of Related Party Transactions, Receivables) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013		Dec. 31, 2012
PSE And G [Member]
Receivable from (Payable to) Services	$ (48)	[1]	$ (65)	[1]
Tax Receivable from (Payable to) PSEG	244	[2]	256	[2]
Accounts Receivable-Affiliated Companies, net	4		2
Accounts Receivable (Payable) - Affiliated Companies, net	59		(73)
Working Capital Advances to Services	33	[3]	33	[3]
Long-Term Accrued Taxes Receivable (Payable)	43	[2]	32	[2]
Power [Member]
Receivables from PSE&G through BGS and BGSS Contracts	107	[4]	238	[4]
Receivables from PSE&G Related to Gas Supply Hedges for BGSS	28	[4]	27	[4]
Receivable from (Payable to) Services	(26)	[1]	(31)	[1]
Tax Receivable from (Payable to) PSEG	23	[2]	111	[2]
Receivable from (Payable to) PSEG	13		(5)
Accounts Receivable-Affiliated Companies, net	145		340
Short-Term Loan to Affiliate (Demand Note to PSEG)	395	[5]	574	[5]
Working Capital Advances to Services	17	[3]	17	[3]
Long-Term Accrued Taxes Receivable (Payable)	$ (39)	[2]	$ (50)	[2]

[1] 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.

[2] 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.

[3] 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.

[4] 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.

[5] 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.