Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 13	$ 12	$ 40	$ 35
Allowance for Funds Used During Construction		13	14	40	42
Solar Loan Interest		5	6	14	16
Other		2	1	5	5
Other Income (Deductions)		33	33	99	98
PSE And G [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		0	0	0	0
Allowance for Funds Used During Construction		13	14	40	42
Solar Loan Interest		5	6	14	16
Other		3	2	7	7
Other Income (Deductions)		21	22	61	65
Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		13	12	40	35
Allowance for Funds Used During Construction		0	0	0	0
Solar Loan Interest		0	0	0	0
Other		1	(1)	(2)	(1)
Other Income (Deductions)		14	11	38	34
Other Entities [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends	[1]	0	0	0	0
Allowance for Funds Used During Construction	[1]	0	0	0	0
Solar Loan Interest	[1]	0	0	0	0
Other	[1]	(2)	0	0	(1)
Other Income (Deductions)	[1]	$ (2)	$ 0	$ 0	$ (1)

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