Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 14	$ 13	$ 44	$ 40
Allowance for Funds Used During Construction		14	13	41	40
Solar Loan Interest		4	5	12	14
Other		3	2	4	5
Other Income (Deductions)		35	33	101	99
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	41	40
Solar Loan Interest		4	5	12	14
Other		4	3	7	7
Other Income (Deductions)		22	21	60	61
PSEG Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		14	13	44	40
Allowance for Funds Used During Construction		0	0	0	0
Solar Loan Interest		0	0	0	0
Other		1	1	(1)	(2)
Other Income (Deductions)		15	14	43	38
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)	(2)	(2)	0
Other Income (Deductions)	[1]	$ (2)	$ (2)	$ (2)	$ 0

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