Other Income And Deductions (Schedule Of Other Income) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Component of Other Income [Line Items]
Investment Income, Interest and Dividend		$ 57	$ 52	$ 45
Components of Other Income [Roll Forward]
Allowance for Funds Used During Construction		59	54	56
Solar Loan Interest		16	18	21
Donations		(11)	(17)	(28)
Other		4	(22)	(12)
Total Other Income and Deductions		125	85	82
Public Service Electric and Gas Company
Component of Other Income [Line Items]
Investment Income, Interest and Dividend		0	0	0
Components of Other Income [Roll Forward]
Allowance for Funds Used During Construction		59	54	56
Solar Loan Interest		16	18	21
Donations		0	0	(1)
Other		8	8	9
Total Other Income and Deductions		83	80	85
PSEG Power LLC
Component of Other Income [Line Items]
Investment Income, Interest and Dividend		57	52	45
Components of Other Income [Roll Forward]
Allowance for Funds Used During Construction		0	0	0
Solar Loan Interest		0	0	0
Donations		0	0	(2)
Other		(3)	(31)	(23)
Total Other Income and Deductions		54	21	20
Other [Member]
Component of Other Income [Line Items]
Investment Income, Interest and Dividend	[1]	0	0	0
Components of Other Income [Roll Forward]
Allowance for Funds Used During Construction	[1]	0	0	0
Solar Loan Interest	[1]	0	0	0
Donations	[1]	(11)	(17)	(25)
Other	[1]	(1)	1	2
Total Other Income and Deductions	[1]	$ (12)	$ (16)	$ (23)

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