Other Income And Deductions (Schedule Of Other Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	$ 103		$ 36		$ 167		$ 153
Allowance for Funds Used During Construction	6		2		17		4
Solar Loan Interest	5		3		13		7
Other	7		4		19		12
Total Other Income	121		45		216		176
Power [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	103		36		167		153
Allowance for Funds Used During Construction	0		0		0		0
Solar Loan Interest	0		0		0		0
Other	1		1		4		3
Total Other Income	104		37		171		156
PSE And G [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	0		0		0		0
Allowance for Funds Used During Construction	6		2		17		4
Solar Loan Interest	5		3		13		7
Other	5		2		9		5
Total Other Income	16		7		39		16
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]
Allowance for Funds Used During Construction	0		0		0		0
Solar Loan Interest	0	[1]	0	[1]	0	[1]	0	[1]
Other	1	[1]	1	[1]	6	[1]	4	[1]
Total Other Income	1	[1]	1	[1]	6	[1]	4	[1]
Power [Member]
Component of Other Income, Nonoperating [Line Items]
Total Other Income	$ 104		$ 37		$ 171		$ 156

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