Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ 17	$ 20
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	11	13
Pension Benefits [Member] | PSEG Power & Other
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	6	7
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	1	(11)
OPEB [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	0	(10)
OPEB [Member] | PSEG Power & Other
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ 1	$ (1)