Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 14	$ 16	$ 27		$ 30
Allowance for Funds Used During Construction		20	14	41		27
Solar Loan Interest		4	4	8		8
Purchase of Tax Losses		(1)		(36)
Other		1	(1)	2		1
Other Income (Deductions)		38	33	42		66
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		20	14	41		27
Solar Loan Interest		4	4	8		8
Purchase of Tax Losses		0		0
Other		2	1	4		3
Other Income (Deductions)		26	19	53		38
PSEG Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		14	16	27		30
Allowance for Funds Used During Construction		0	0	0		0
Solar Loan Interest		0	0	0		0
Purchase of Tax Losses		(1)		(36)
Other		(1)	(1)	(2)		(2)
Other Income (Deductions)		12	15	(11)		28
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	[1]
Other	[1]	0	(1)	0		0
Other Income (Deductions)	[1]	$ 0	$ (1)	$ 0		$ 0

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