Other Income And Deductions (Schedule Of Other Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	$ 47		$ 28
Allowance for Funds Used During Construction	6		4
Solar Loan Interest	6		4
Other	2		8
Total Other Income	61		44
Power [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	47		28
Allowance for Funds Used During Construction	0		0
Solar Loan Interest	0		0
Other	0		2
Total Other Income	47		30
PSE And G [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	0		0
Allowance for Funds Used During Construction	6		4
Solar Loan Interest	6		4
Other	1		3
Total Other Income	13		11
Other Segments [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Gains, Interest, Dividend and Other Income	0	[1]	0	[1]
Allowance for Funds Used During Construction	0		0
Solar Loan Interest	0	[1]	0	[1]
Other	1	[1]	3	[1]
Total Other Income	1		3
Power [Member]
Component of Other Income, Nonoperating [Line Items]
Total Other Income	$ 47		$ 30

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