Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ (29)	$ (21)	$ (58)	$ (41)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(17)	(16)	(35)	(32)
Pension Benefits [Member] | Other Entities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(12)	(5)	(23)	(9)
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(31)	(24)	(62)	(48)
OPEB [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	(28)	(23)	(55)	(46)
OPEB [Member] | Other Entities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefits (Credits) Costs	$ (3)	$ (1)	$ (7)	$ (2)