Other Income (Deductions) (Schedule Of Other Income (Deductions)) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 12	$ 14	$ 39		$ 44
Allowance for Funds Used During Construction		24	14	65		41
Solar Loan Interest		3	4	11		12
Purchase of Tax Losses		0		(36)
Other		0	3	2		4
Other Income (Deductions)		39	35	81		101
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		24	14	65		41
Solar Loan Interest		3	4	11		12
Purchase of Tax Losses		0		0
Other		1	4	5		7
Other Income (Deductions)		28	22	81		60
PSEG Power [Member]
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		12	14	39		44
Allowance for Funds Used During Construction		0	0	0		0
Solar Loan Interest		0	0	0		0
Purchase of Tax Losses		0		(36)
Other		(1)	1	(3)		(1)
Other Income (Deductions)		11	15	0		43
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	(2)	0		(2)
Other Income (Deductions)	[1]	$ 0	$ (2)	$ 0		$ (2)

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