Net Other Income (Deductions) - Schedule of Net Other Income (Deductions) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Component of Other Income (Deductions) [Line Items]
Total Net Other Income (Deductions)		$ 46	$ 47	$ 83	$ 82
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		10	9	21	20
Solar Loan Interest		1	1	2	3
Other Interest		4	1	7	3
Other		1	5	2	6
Total Net Other Income (Deductions)		16	16	32	32
PSEG Power & Other
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends	[1]	25	23	45	40
Allowance for Funds Used During Construction	[1]	0	0	0	0
Solar Loan Interest	[1]	0	0	0	0
Other Interest	[1]	8	11	12	16
Other	[1]	(3)	(3)	(6)	(6)
Total Net Other Income (Deductions)	[1]	30	31	51	50
PSEG Power
Component of Other Income (Deductions) [Line Items]
NDT Fund Interest and Dividends		25	23	45	40
Allowance for Funds Used During Construction		10	9	21	20
Solar Loan Interest		1	1	2	3
Other Interest		12	12	19	19
Other		(2)	2	(4)	0
Total Net Other Income (Deductions)		$ 46	$ 47	$ 83	$ 82

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