Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Revenues	$ 2,302	$ 2,394	$ 7,598	$ 7,228
Operating Expenses [Abstract]
Energy Costs	753	804	2,581	2,356
Operation and Maintenance	745	742	2,251	2,221
Depreciation and Amortization	307	294	928	854
Loss on Asset Dispositions	7	0	402	0
Total Operating Expenses	1,812	1,840	6,162	5,431
OPERATING INCOME	490	554	1,436	1,797
Income from Equity Method Investments	3	5	10	12
Net Gains (Losses) on Trust Investments	(3)	45	164	31
Other Income (Deductions)	35	33	101	99
Non-Operating Pension and OPEB Credits (Costs)	55	19	121	57
Interest Expense	(147)	(127)	(417)	(341)
Income Before Income Taxes	433	529	1,415	1,655
Income Tax Benefit (Expense)	(30)	(117)	(159)	(416)
Net Income	$ 403	$ 412	$ 1,256	$ 1,239
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (shares)	504	504	504	504
DILUTED (shares)	507	507	507	507
EARNINGS PER SHARE:
BASIC (dollars per share)	$ 0.80	$ 0.82	$ 2.49	$ 2.46
DILUTED (dollars per share)	$ 0.79	$ 0.81	$ 2.47	$ 2.44
Public Service Electric and Gas Company [Member]
Operating Revenues	$ 1,604	$ 1,595	$ 5,018	$ 4,826
Operating Expenses [Abstract]
Energy Costs	618	593	2,094	1,863
Operation and Maintenance	388	389	1,165	1,133
Depreciation and Amortization	206	192	620	569
Total Operating Expenses	1,212	1,174	3,879	3,565
OPERATING INCOME	392	421	1,139	1,261
Net Gains (Losses) on Trust Investments	0	0	1	0
Other Income (Deductions)	22	21	60	61
Non-Operating Pension and OPEB Credits (Costs)	46	14	105	44
Interest Expense	(92)	(83)	(268)	(246)
Income Before Income Taxes	368	373	1,037	1,120
Income Tax Benefit (Expense)	(24)	(95)	(63)	(292)
Net Income	344	278	974	828
PSEG Power [Member]
Operating Revenues	771	868	3,270	3,038
Operating Expenses [Abstract]
Energy Costs	359	431	1,556	1,550
Operation and Maintenance	233	231	736	745
Depreciation and Amortization	93	94	282	260
Loss on Asset Dispositions	7		402	0
Total Operating Expenses	692	756	2,976	2,555
OPERATING INCOME	79	112	294	483
Income from Equity Method Investments	3	5	10	12
Net Gains (Losses) on Trust Investments	(4)	44	160	30
Other Income (Deductions)	15	14	43	38
Non-Operating Pension and OPEB Credits (Costs)	8	4	14	11
Interest Expense	(34)	(29)	(85)	(47)
Income Before Income Taxes	67	150	436	527
Income Tax Benefit (Expense)	(14)	(25)	(127)	(127)
Net Income	$ 53	$ 125	$ 309	$ 400