Income Taxes (Schedule Of Effective Tax Rates) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Taxes [Line Items]
Pre-Tax Income	$ 1,585	$ (154)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	333	(32)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	108	(29)
Uncertain Tax Positions	(6)	(3)
Effective Income Tax Rate Reconciliation, Leasing Activities, Amount	(17)	0
Effective Income Tax Rate Reconciliation, GPRC	(16)	(6)
Effective Tax Rate Reconciliation, Effective Tax Rate Adjustment	(23)	(12)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(75)	(73)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(6)	3
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(35)	(120)
Income Tax Provision	$ 298	$ (152)
Effective tax rate	18.80%	98.70%
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	$ 541	$ 598
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	114	126
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	38	41
Effective Income Tax Rate Reconciliation, GPRC	(16)	(6)
Effective Income Tax Rate Reconciliation, Tax Adjustment Credit, Amount	(75)	(73)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(7)	1
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(60)	(37)
Income Tax Provision	$ 54	$ 89
Effective tax rate	10.00%	14.90%