Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 12	$ 10
Allowance for Funds Used During Construction		14	14
Solar Loan Interest		4	5
Other		2	3
Other Income (Deductions)		32	32
PSE And G [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		0	0
Allowance for Funds Used During Construction		14	14
Solar Loan Interest		4	5
Other		2	3
Other Income (Deductions)		20	22
Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		12	10
Allowance for Funds Used During Construction		0	0
Solar Loan Interest		0	0
Other		(1)	1
Other Income (Deductions)		11	11
Other Entities [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends	[1]	0	0
Allowance for Funds Used During Construction	[1]	0	0
Solar Loan Interest	[1]	0	0
Other	[1]	1	(1)
Other Income (Deductions)	[1]	$ 1	$ (1)

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