Income Taxes - Schedule of Effective Tax Rates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Taxes [Line Items]
Pre-Tax Income	$ 726	$ 437	$ 1,343	$ 1,066
Tax Computed at Statutory Rate @ 21%	152	92	282	224
Increase (Decrease) Attributable to Flow-Through of Certain Tax Adjustments:
State Income Taxes (net of federal income tax)	34	34	79	74
NDT Fund	14	3	17	15
Uncertain Tax Positions	2	1	3	2
GPRC-CEF-EE	(14)	(13)	(30)	(28)
Tax Credits	(1)	(104)	(3)	(106)
Estimated Annual Effective Tax Rate Interim Period Adjustment	12	5	(25)	(12)
TAC	(59)	(24)	(155)	(67)
Other	1	9	1	(2)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total	(11)	(89)	(113)	(124)
Total Income Tax Expense	$ 141	$ 3	$ 169	$ 100
Effective Income Tax Rate	19.40%	0.70%	12.60%	9.40%
Public Service Electric and Gas Company [Member]
Income Taxes [Line Items]
Pre-Tax Income	$ 365	$ 361	$ 955	$ 941
Tax Computed at Statutory Rate @ 21%	77	76	201	198
Increase (Decrease) Attributable to Flow-Through of Certain Tax Adjustments:
State Income Taxes (net of federal income tax)	24	25	67	66
Uncertain Tax Positions	0	0	1	0
GPRC-CEF-EE	(14)	(13)	(30)	(28)
Tax Credits	(1)	(2)	(3)	(4)
TAC	(59)	(24)	(155)	(67)
Bad Debt Flow-Through	(2)	(4)	2	(6)
Other	8	1	(6)	(8)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total	(44)	(17)	(124)	(47)
Total Income Tax Expense	$ 33	$ 59	$ 77	$ 151
Effective Income Tax Rate	9.00%	16.30%	8.10%	16.00%