Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Revenues	$ 1,874	$ 2,050	$ 4,763	$ 4,831
Operating Expenses [Abstract]
Energy Costs	606	595	1,635	1,501
Operation and Maintenance	783	733	1,561	1,487
Depreciation and Amortization	322	315	663	639
(Gains) Losses on Asset Dispositions and Impairments	457	0	457	0
Total Operating Expenses	2,168	1,643	4,316	3,627
OPERATING INCOME	(294)	407	447	1,204
Income from Equity Method Investments	6	3	9	6
Net Gains (Losses) on Trust Investments	81	201	141	(20)
Other Income (Deductions)	33	38	58	42
Non-Operating Pension and OPEB Credits (Costs)	82	62	164	124
Interest Expense	(147)	(151)	(293)	(304)
Income Before Income Taxes	(239)	560	526	1,052
Income Tax Benefit (Expense)	62	(109)	(55)	(153)
Net Income (Loss)	$ (177)	$ 451	$ 471	$ 899
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (shares)	504	504	504	504
DILUTED (shares)	504	507	507	507
EARNINGS PER SHARE:
BASIC (dollars per share)	$ (0.35)	$ 0.89	$ 0.94	$ 1.78
DILUTED (dollars per share)	$ (0.35)	$ 0.89	$ 0.93	$ 1.77
Public Service Electric and Gas Company [Member]
Operating Revenues	$ 1,514	$ 1,456	$ 3,587	$ 3,339
Operating Expenses [Abstract]
Energy Costs	509	510	1,358	1,218
Operation and Maintenance	393	380	817	766
Depreciation and Amortization	231	217	472	439
Total Operating Expenses	1,133	1,107	2,647	2,423
OPERATING INCOME	381	349	940	916
Net Gains (Losses) on Trust Investments	0	1	1	1
Other Income (Deductions)	24	26	52	53
Non-Operating Pension and OPEB Credits (Costs)	66	52	132	103
Interest Expense	(101)	(98)	(199)	(194)
Income Before Income Taxes	370	330	926	879
Income Tax Benefit (Expense)	(61)	(47)	(140)	(156)
Net Income (Loss)	309	283	786	723
PSEG Power [Member]
Operating Revenues	380	683	1,547	1,903
Operating Expenses [Abstract]
Energy Costs	271	323	953	999
Operation and Maintenance	259	225	481	466
Depreciation and Amortization	83	91	175	185
(Gains) Losses on Asset Dispositions and Impairments	457	0	457	0
Total Operating Expenses	1,070	639	2,066	1,650
OPERATING INCOME	(690)	44	(519)	253
Income from Equity Method Investments	6	3	9	6
Net Gains (Losses) on Trust Investments	79	196	137	(24)
Other Income (Deductions)	8	12	4	(11)
Non-Operating Pension and OPEB Credits (Costs)	11	9	23	17
Interest Expense	(24)	(30)	(51)	(64)
Income Before Income Taxes	(610)	234	(397)	177
Income Tax Benefit (Expense)	127	(64)	75	6
Net Income (Loss)	$ (483)	$ 170	$ (322)	$ 183