Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Revenues	$ 10,076	$ 9,696	$ 9,094
Operating Expenses [Abstract]
Energy Costs	3,372	3,225	2,778
Operation and Maintenance	3,111	3,069	2,901
Depreciation and Amortization	1,248	1,158	1,986
Gain (Loss) on Disposition of Assets	402	(54)	0
Total Operating Expenses	8,133	7,398	7,665
OPERATING INCOME	1,943	2,298	1,429
Income from Equity Method Investments	14	15	14
Net Gains (Losses) on Trust Investments	260	(143)	134
Other Income (Deductions)	125	85	82
Non-Operating Pension and Other Postretirement Plan Credits (Costs)	177	76	0
Interest Expense	(569)	(476)	(391)
Income (Loss) before Income Taxes	1,950	1,855	1,268
Income Tax (Expense) Benefit	(257)	(417)	306
Net Income	$ 1,693	$ 1,438	$ 1,574
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC	504	504	505
DILUTED	507	507	507
EARNINGS PER SHARE:
NET INCOME, BASIC	$ 3.35	$ 2.85	$ 3.12
NET INCOME, DILUTED	$ 3.33	$ 2.83	$ 3.10
Public Service Electric and Gas Company
Operating Revenues	$ 6,625	$ 6,471	$ 6,324
Operating Expenses [Abstract]
Energy Costs	2,738	2,520	2,421
Operation and Maintenance	1,581	1,575	1,458
Depreciation and Amortization	837	770	685
Total Operating Expenses	5,156	4,865	4,564
OPERATING INCOME	1,469	1,606	1,760
Net Gains (Losses) on Trust Investments	2	(1)	2
Other Income (Deductions)	83	80	85
Non-Operating Pension and Other Postretirement Plan Credits (Costs)	150	59	(8)
Interest Expense	(361)	(333)	(303)
Income (Loss) before Income Taxes	1,343	1,411	1,536
Income Tax (Expense) Benefit	(93)	(344)	(563)
Net Income	1,250	1,067	973
PSEG Power LLC
Operating Revenues	4,385	4,146	3,860
Operating Expenses [Abstract]
Energy Costs	2,118	2,197	1,913
Operation and Maintenance	1,040	1,053	1,046
Depreciation and Amortization	377	354	1,268
Gain (Loss) on Disposition of Assets	402	(54)	0
Total Operating Expenses	3,937	3,550	4,227
OPERATING INCOME	448	596	(367)
Income from Equity Method Investments	14	15	14
Net Gains (Losses) on Trust Investments	253	(140)	125
Other Income (Deductions)	54	21	20
Non-Operating Pension and Other Postretirement Plan Credits (Costs)	21	15	8
Interest Expense	(119)	(76)	(50)
Income (Loss) before Income Taxes	671	431	(250)
Income Tax (Expense) Benefit	(203)	(66)	729
Net Income	$ 468	$ 365	$ 479