Other Income And Deductions (Schedule Of Other Income) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Component of Other Income [Line Items]
Investment Income, Interest and Dividend		$ 52	$ 57	$ 52
Components of Other Income [Roll Forward]
Allowance for Funds Used During Construction		87	59	54
Solar Loan Interest		15	16	18
Donations		(3)	(11)	(17)
Purchase of Tax Losses		36		26
Other		0	4	4
Total Other Income and Deductions		115	125	85
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		87	59	54
Solar Loan Interest		15	16	18
Donations		0	0	0
Purchase of Tax Losses		0		0
Other		6	8	8
Total Other Income and Deductions		108	83	80
PSEG Power LLC
Component of Other Income [Line Items]
Investment Income, Interest and Dividend		52	57	52
Components of Other Income [Roll Forward]
Allowance for Funds Used During Construction		0	0	0
Solar Loan Interest		0	0	0
Donations		0	0	0
Purchase of Tax Losses		36		26
Other		(4)	(3)	(5)
Total Other Income and Deductions		12	54	21
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]	(3)	(11)	(17)
Purchase of Tax Losses		0		0
Other	[1]	(2)	(1)	1
Total Other Income and Deductions	[1]	$ (5)	$ (12)	$ (16)

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