Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 14	$ 14	$ 27		$ 27
Allowance for Funds Used During Construction		19	20	42		41
Solar Loan Interest		4	4	7		8
Purchase of Tax Losses		(3)	(1)	(19)		(36)
Other		(1)	1	1		2
Other Income (Deductions)		33	38	58		42
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		19	20	42		41
Solar Loan Interest		4	4	7		8
Purchase of Tax Losses		0	0	0		0
Other		1	2	3		4
Other Income (Deductions)		24	26	52		53
PSEG Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		14	14	27		27
Allowance for Funds Used During Construction		0	0	0		0
Solar Loan Interest		0	0	0		0
Purchase of Tax Losses		(3)	(1)	(19)		(36)
Other		(3)	(1)	(4)		(2)
Other Income (Deductions)		8	12	4		(11)
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	0	0	[1]	0
Other	[1]	1	0	2		0
Other Income (Deductions)	[1]	$ 1	$ 0	$ 2		$ 0

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