Other Income And Deductions (Schedule Of Other Deductions) (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 Realized Losses and Expenses	$ 20		$ 10		$ 45		$ 32
Other	6		1		16		7
Total Other Deductions	26		11		61		39
Power [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	20		10		45		32
Other	0		0		7		5
Total Other Deductions	20		10		52		37
PSE And G [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	0		0		0		0
Other	6		1		8		2
Total Other Deductions	6		1		8		2
Other Segments [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	0	[1]	0	[1]	0	[1]	0	[1]
Other	0	[1]	0	[1]	1	[1]	0	[1]
Total Other Deductions	$ 0	[1]	$ 0	[1]	$ 1	[1]	$ 0	[1]

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