Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021		Sep. 30, 2020
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 18	$ 12	$ 45		$ 39
Allowance for Funds Used During Construction		16	24	58		65
Solar Loan Interest		3	3	10		11
Purchase of Tax Losses				(19)		(36)
Other		(2)	0	(1)		2
Other Income (Deductions)		35	39	93		81
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		16	24	58		65
Solar Loan Interest		3	3	10		11
Purchase of Tax Losses				0		0
Other		1	1	4		5
Other Income (Deductions)		20	28	72		81
PSEG Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		18	12	45		39
Allowance for Funds Used During Construction		0	0	0		0
Solar Loan Interest		0	0	0		0
Purchase of Tax Losses				(19)		(36)
Other		(2)	(1)	(6)		(3)
Other Income (Deductions)		16	11	20		0
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
Purchase of Tax Losses				0	[1]	0
Other	[1]	(1)	0	1		0
Other Income (Deductions)	[1]	$ (1)	$ 0	$ 1		$ 0

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