Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 16	$ 15	$ 30	$ 27
Allowance for Funds Used During Construction		14	13	27	27
Solar Loan Interest		4	5	8	9
Other		(1)	1	1	3
Other Income (Deductions)		33	34	66	66
Public Service Electric and Gas Company [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		0	0	0	0
Allowance for Funds Used During Construction		14	13	27	27
Solar Loan Interest		4	5	8	9
Other		1	2	3	4
Other Income (Deductions)		19	20	38	40
PSEG Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		16	15	30	27
Allowance for Funds Used During Construction		0	0	0	0
Solar Loan Interest		0	0	0	0
Other		(1)	(2)	(2)	(3)
Other Income (Deductions)		15	13	28	24
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]	(1)	1	0	2
Other Income (Deductions)	[1]	$ (1)	$ 1	$ 0	$ 2

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