Income Taxes (Schedule Of Effective Tax Rates) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Taxes [Line Items]
Pre-Tax Income	$ (154)	$ 765
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	(32)	161
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	(29)	41
Income Tax Reconciliation Deductions Nuclear Decommissioning Trust	(6)	8
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount	0	(7)
Effective Income Tax Rate Reconciliation, GPRC	(6)	(1)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(73)	(78)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(6)	(7)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(120)	(44)
Income Tax Provision	$ (152)	$ 117
Effective tax rate	98.70%	15.30%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Public Service Electric and Gas Company [Member]
Income Taxes [Line Items]
Pre-Tax Income	$ 598	$ 556
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	126	117
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	41	38
Effective Income Tax Rate Reconciliation, GPRC	(6)	(1)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(73)	(78)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	1	3
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(37)	(38)
Income Tax Provision	$ 89	$ 79
Effective tax rate	14.90%	14.20%