Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Revenues	$ 2,050	$ 2,316	$ 4,831	$ 5,296
Operating Expenses [Abstract]
Energy Costs	595	704	1,501	1,828
Operation and Maintenance	733	750	1,487	1,506
Depreciation and Amortization	315	307	639	621
Gain (Loss) on Disposition of Assets	0	(395)	0	(395)
Total Operating Expenses	1,643	2,156	3,627	4,350
OPERATING INCOME	407	160	1,204	946
Income from Equity Method Investments	3	5	6	7
Net Gains (Losses) on Trust Investments	201	39	(20)	167
Other Income (Deductions)	38	33	42	66
Non-Operating Pension and OPEB Credits (Costs)	62	33	124	66
Interest Expense	(151)	(137)	(304)	(270)
Income Before Income Taxes	560	133	1,052	982
Income Tax Benefit (Expense)	(109)	20	(153)	(129)
Net Income (Loss)	$ 451	$ 153	$ 899	$ 853
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (shares)	504	504	504	504
DILUTED (shares)	507	507	507	507
EARNINGS PER SHARE:
BASIC (dollars per share)	$ 0.89	$ 0.30	$ 1.78	$ 1.69
DILUTED (dollars per share)	$ 0.89	$ 0.30	$ 1.77	$ 1.68
Public Service Electric and Gas Company [Member]
Operating Revenues	$ 1,456	$ 1,382	$ 3,339	$ 3,414
Operating Expenses [Abstract]
Energy Costs	510	529	1,218	1,476
Operation and Maintenance	380	369	766	777
Depreciation and Amortization	217	202	439	414
Total Operating Expenses	1,107	1,100	2,423	2,667
OPERATING INCOME	349	282	916	747
Net Gains (Losses) on Trust Investments	1	0	1	1
Other Income (Deductions)	26	19	53	38
Non-Operating Pension and OPEB Credits (Costs)	52	29	103	59
Interest Expense	(98)	(89)	(194)	(176)
Income Before Income Taxes	330	241	879	669
Income Tax Benefit (Expense)	(47)	(14)	(156)	(39)
Net Income (Loss)	283	227	723	630
PSEG Power [Member]
Operating Revenues	683	1,083	1,903	2,499
Operating Expenses [Abstract]
Energy Costs	323	411	999	1,197
Operation and Maintenance	225	268	466	503
Depreciation and Amortization	91	95	185	189
Gain (Loss) on Disposition of Assets	0	(395)	0	(395)
Total Operating Expenses	639	1,169	1,650	2,284
OPERATING INCOME	44	(86)	253	215
Income from Equity Method Investments	3	5	6	7
Net Gains (Losses) on Trust Investments	196	38	(24)	164
Other Income (Deductions)	12	15	(11)	28
Non-Operating Pension and OPEB Credits (Costs)	9	3	17	6
Interest Expense	(30)	(26)	(64)	(51)
Income Before Income Taxes	234	(51)	177	369
Income Tax Benefit (Expense)	(64)	11	6	(113)
Net Income (Loss)	$ 170	$ (40)	$ 183	$ 256