Other Income And Deductions (Schedule Of Other Deductions) (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 Realized Losses and Expenses	$ 20		$ 8
Other	9		8
Total Other Deductions	29		16
Power [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	20		8
Other	8		7
Total Other Deductions	28		15
PSE And G [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	0		0
Other	1		1
Total Other Deductions	1		1
Other Segments [Member]
Component of Other Income, Nonoperating [Line Items]
NDT Fund Realized Losses and Expenses	0	[1]	0	[1]
Other	0	[1]	0	[1]
Total Other Deductions	$ 0		$ 0

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