Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ 20	$ (29)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	13	(18)
Pension Benefits [Member] | PSEG Power & Other
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	7	(11)
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(11)	(31)
OPEB [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(10)	(27)
OPEB [Member] | PSEG Power & Other
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ (1)	$ (4)