Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ 349	$ (28)	$ 389	$ (86)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	10	(18)	37	(53)
Pension Benefits [Member] | PSEG Power & Other
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	339	(10)	352	(33)
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(11)	(31)	(32)	(93)
OPEB [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(11)	(27)	(31)	(82)
OPEB [Member] | PSEG Power & Other
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ 0	$ (4)	$ (1)	$ (11)