Other Income And Deductions (Schedule Of Other Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	$ 36		$ 48		$ 64		$ 117
Solar Loan Interest	4		2		8		4
Other	11		5		23		10
Total Other Income	51		55		95		131
Power [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	36		48		64		117
Solar Loan Interest	0		0		0		0
Other	1		1		3		2
Total Other Income	37		49		67		119
PSE And G [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	0		0		0		0
Solar Loan Interest	4		2		8		4
Other	8		2		15		5
Total Other Income	12		4		23		9
Other Segments [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	0	[1]	0	[1]	0	[1]	0	[1]
Solar Loan Interest	0	[1]	0	[1]	0	[1]	0	[1]
Other	2	[1]	2	[1]	5	[1]	3	[1]
Total Other Income	$ 2	[1]	$ 2	[1]	$ 5	[1]	$ 3	[1]

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