Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ (28)	$ (21)	$ (86)	$ (62)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(18)	(16)	(53)	(48)
Pension Benefits [Member] | Other Entities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(10)	(5)	(33)	(14)
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(31)	(24)	(93)	(72)
OPEB [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(27)	(23)	(82)	(69)
OPEB [Member] | Other Entities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ (4)	$ (1)	$ (11)	$ (3)