Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Operating Revenues	$ 9,603		$ 10,076		$ 9,696
Operating Expenses [Abstract]
Energy Costs	3,056		3,372		3,225
Operation and Maintenance	3,115		3,111		3,069
Depreciation and Amortization	1,285		1,248		1,158
Gain (Loss) on Disposition of Assets	(123)		402		(54)
Total Operating Expenses	7,333		8,133		7,398
OPERATING INCOME	2,270		1,943		2,298
Income from Equity Method Investments	14		14		15
Net Gains (Losses) on Trust Investments	253		260		(143)
Other Income (Deductions)	115		125		85
Non-Operating Pension and Other Postretirement Plan Credits (Costs)	249		177		76
Interest Expense	(600)		(569)		(476)
Income (Loss) before Income Taxes	2,301		1,950		1,855
Income Tax (Expense) Benefit	(396)		(257)		(417)
Net Income	$ 1,905	[1]	$ 1,693	[1]	$ 1,438
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC	504		504		504
DILUTED	507		507		507
EARNINGS PER SHARE:
NET INCOME, BASIC	$ 3.78		$ 3.35		$ 2.85
NET INCOME, DILUTED	$ 3.76		$ 3.33		$ 2.83
Public Service Electric and Gas Company
Operating Revenues	$ 6,608		$ 6,625		$ 6,471
Operating Expenses [Abstract]
Energy Costs	2,469		2,738		2,520
Operation and Maintenance	1,614		1,581		1,575
Depreciation and Amortization	887		837		770
Gain (Loss) on Disposition of Assets	(1)		0		0
Total Operating Expenses	4,969		5,156		4,865
OPERATING INCOME	1,639		1,469		1,606
Net Gains (Losses) on Trust Investments	3		2		(1)
Other Income (Deductions)	108		83		80
Non-Operating Pension and Other Postretirement Plan Credits (Costs)	205		150		59
Interest Expense	(388)		(361)		(333)
Income (Loss) before Income Taxes	1,567		1,343		1,411
Income Tax (Expense) Benefit	(240)		(93)		(344)
Net Income	1,327		1,250		1,067
PSEG Power LLC
Operating Revenues	3,634		4,385		4,146
Operating Expenses [Abstract]
Energy Costs	1,821		2,118		2,197
Operation and Maintenance	964		1,040		1,053
Depreciation and Amortization	368		377		354
Gain (Loss) on Disposition of Assets	(122)		402		(54)
Total Operating Expenses	3,031		3,937		3,550
OPERATING INCOME	603		448		596
Income from Equity Method Investments	14		14		15
Net Gains (Losses) on Trust Investments	241		253		(140)
Other Income (Deductions)	12		54		21
Non-Operating Pension and Other Postretirement Plan Credits (Costs)	33		21		15
Interest Expense	(121)		(119)		(76)
Income (Loss) before Income Taxes	782		671		431
Income Tax (Expense) Benefit	(188)		(203)		(66)
Net Income	$ 594		$ 468		$ 365

[1] Includes an after-tax gain of $86 million in the year ended December 31, 2020 related to the sale of PSEG Power’s interest in the Yards Creek generation facility and an after-tax loss of $286 million in the year ended December 31, 2019 related to the sale of PSEG Power’s ownership interests in the Keystone and Conemaugh fossil generation plants. See Note 4. Early Plant Retirements/Asset Dispositions for additional information.