Other Income And Deductions (Schedule Of Other Deductions) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	$ 58		$ 50		$ 45
Gains (Losses) on Extinguishment of Debt	15		17
Other	25		18		18
Total Other Deductions	98		85		63
Power [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	58		50		45
Gains (Losses) on Extinguishment of Debt	15		17
Other	17		12		8
Total Other Deductions	90		79		53
PSE&G [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	0		0		0
Gains (Losses) on Extinguishment of Debt	0		0
Other	5		4		3
Total Other Deductions	5		4		3
Other Segments [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	0	[1]	0	[1]	0	[1]
Gains (Losses) on Extinguishment of Debt	0	[1]
Other	3	[1]	2	[1]	7	[1]
Total Other Deductions	$ 3	[1]	$ 2	[1]	$ 7	[1]

[1] Other primarily consists of activity at PSEG (parent company), Energy Holdings and Services and intercompany eliminations.