Income Taxes (Schedule Of Effective Tax Rates) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Taxes [Line Items]
Pre-Tax Income	$ 98	$ (239)	$ (56)	$ 526
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	21	(50)	(12)	110
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	6	(24)	(22)	18
Income Tax Reconciliation Deductions Nuclear Decommissioning Trust	(18)	9	(24)	18
Effective Income Tax Rate Reconciliation, GPRC	(8)	(2)	(14)	(3)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(32)	(40)	(106)	(118)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	0	10	(3)	(1)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(54)	(12)	(173)	(55)
Income Tax Provision	$ (33)	$ (62)	$ (185)	$ 55
Effective tax rate	(33.70%)	25.90%	330.40%	10.50%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Effective Income Tax Reconciliation, Tax Credit Amortization/Recapture	$ (2)	$ 35	$ (4)	$ 31
Public Service Electric and Gas Company [Member]
Income Taxes [Line Items]
Pre-Tax Income	361	370	959	926
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	76	78	201	194
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	25	25	67	63
Effective Income Tax Rate Reconciliation, GPRC	(8)	(2)	(14)	(3)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(32)	(40)	(106)	(118)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(5)	0	(3)	4
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(20)	(17)	(56)	(54)
Income Tax Provision	$ 56	$ 61	$ 145	$ 140
Effective tax rate	15.50%	16.50%	15.10%	15.10%