Income Taxes (Schedule Of Effective Tax Rates) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Taxes [Line Items]
Pre-Tax Income	$ 65	$ 55	$ 2,394	$ (1)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	14	12	503	0
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	(1)	7	157	(16)
Uncertain Tax Positions	1	(5)	(6)	(6)
Effective Income Tax Rate Reconciliation, Leasing Activities, Amount	0	0	(17)	0
Effective Income Tax Rate Reconciliation, GPRC	(13)	(11)	(36)	(25)
Effective Tax Rate Reconciliation, Effective Tax Rate Adjustment	9	(7)	(7)	(14)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(62)	(44)	(188)	(150)
Effective Income Tax Rate Reconciliation, Bad Debt Flow Through	(2)	(2)	(9)	(2)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(15)	3	(24)	9
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(88)	(71)	(126)	(244)
Income Tax Provision	(74)	(59)	$ 377	(244)
Effective tax rate			15.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Income Tax Reconciliation Deductions Nuclear Decommissioning Trust	(3)	(10)	$ 11	(34)
Effective Income Tax Reconciliation, Tax Credit Amortization/Recapture	(2)	(2)	(7)	(6)
Public Service Electric and Gas Company [Member]
Income Taxes [Line Items]
Pre-Tax Income	454	468	1,365	1,427
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	95	98	287	300
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	33	32	100	99
Uncertain Tax Positions	0	0	(5)	0
Effective Income Tax Rate Reconciliation, GPRC	(13)	(11)	(36)	(25)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(62)	(44)	(188)	(150)
Effective Income Tax Rate Reconciliation, Bad Debt Flow Through	(2)	(2)	(9)	(2)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	4	(2)	(1)	(2)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(42)	(29)	(146)	(86)
Income Tax Provision	$ 53	$ 69	$ 141	$ 214
Effective tax rate	11.70%	14.70%	10.30%	15.00%
Effective Income Tax Reconciliation, Tax Credit Amortization/Recapture	$ (2)	$ (2)	$ (7)	$ (6)