Income Taxes (Schedule Of Effective Tax Rates) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Taxes [Line Items]
Pre-Tax Income	$ 744	$ 98	$ 2,329	$ (56)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	156	21	489	(12)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	50	6	158	(22)
Uncertain Tax Positions	(1)	0	(7)	(2)
Effective Income Tax Rate Reconciliation, Leasing Activities, Amount	0	0	(17)	0
Effective Income Tax Rate Reconciliation, GPRC	(8)	(8)	(24)	(14)
Effective Tax Rate Reconciliation, Effective Tax Rate Adjustment	7	4	(16)	(8)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(51)	(32)	(126)	(106)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(4)	(4)	(14)	7
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(3)	(54)	(38)	(173)
Income Tax Provision	$ 153	$ (33)	$ 451	(185)
Effective tax rate	20.60%	(33.70%)	19.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Income Tax Reconciliation Deductions Nuclear Decommissioning Trust	$ 7	$ (18)	$ 13	(24)
Effective Income Tax Reconciliation, Tax Credit Amortization/Recapture	(3)	(2)	(5)	(4)
Public Service Electric and Gas Company [Member]
Income Taxes [Line Items]
Pre-Tax Income	370	361	911	959
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	78	76	191	201
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	30	25	68	67
Uncertain Tax Positions	(6)	0	(6)	0
Effective Income Tax Rate Reconciliation, GPRC	(8)	(8)	(24)	(14)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(51)	(32)	(126)	(106)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(6)	(3)	(10)	1
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(44)	(20)	(103)	(56)
Income Tax Provision	$ 34	$ 56	$ 88	$ 145
Effective tax rate	9.20%	15.50%	9.70%	15.10%
Effective Income Tax Reconciliation, Tax Credit Amortization/Recapture	$ (3)	$ (2)	$ (5)	$ (4)