Net Other Income (Deductions) - Schedule of Net Other Income (Deductions) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		$ 21	$ 16	$ 61	$ 50
Allowance for Funds Used During Construction		11	15	31	45
Solar Loan Interest		1	2	4	6
Other Interest		7	9	26	32
Other		(3)	(1)	(3)	(1)
Net Other Income (Deductions)		37	41	119	132
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		11	15	31	45
Solar Loan Interest		1	2	4	6
Other Interest		4	3	7	10
Other		2	1	8	4
Net Other Income (Deductions)		18	21	50	65
PSEG Power & Other
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends	[1]	21	16	61	50
Allowance for Funds Used During Construction	[1]	0	0	0	0
Solar Loan Interest	[1]	0	0	0	0
Other Interest	[1]	3	6	19	22
Other	[1]	(5)	(2)	(11)	(5)
Net Other Income (Deductions)	[1]	$ 19	$ 20	$ 69	$ 67

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