Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total		Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment	Public Service Electric and Gas Company	Public Service Electric and Gas Company Cumulative Effect, Period of Adoption, Adjustment	Public Service Electric and Gas Company Common Stock [Member]	Public Service Electric and Gas Company Contributed Capital [Member]	Public Service Electric and Gas Company Basis Adjustment [Member]	Public Service Electric and Gas Company Retained Earnings [Member]	Public Service Electric and Gas Company Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	Public Service Electric and Gas Company Accumulated Other Comprehensive Income (Loss) [Member]	PSEG Power LLC	PSEG Power LLC Contributed Capital [Member]	PSEG Power LLC Basis Adjustment [Member]	PSEG Power LLC Retained Earnings [Member]	PSEG Power LLC Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	PSEG Power LLC Accumulated Other Comprehensive Income (Loss) [Member]	PSEG Power LLC Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment
Beginning Balance (in value) at Dec. 31, 2017	$ 13,847			$ 4,961	$ (763)	$ 9,878	$ 176	$ (229)	$ (176)	$ 9,834		$ 892	$ 1,095	$ 986	$ 6,861		$ 0	$ 5,967	$ 2,214	$ (986)	$ 4,911	$ 175	$ (172)	$ (175)
Beginning Balance, shares at Dec. 31, 2017				534	(29)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,438					1,438				1,067					1,067			365			365
Other Comprehensive Income (Loss), net of tax
Other Comprehensive Income (Loss), net of tax	28							28		(1)							(1)	28					28
Comprehensive Income	1,466									1,066								393
Cash Dividends on Common Stock	(910)					(910)		0										(400)			(400)
Contributed Capital										0
Other	(26)			$ 19	$ (45)	0		0
Treasury Stock, Shares, Acquired					(1)
Ending Balance (in value) at Dec. 31, 2018	$ 14,377			$ 4,980	$ (808)	10,582	81	(377)	$ (81)	10,900		892	1,095	986	7,928		(1)	5,960	2,214	(986)	5,051	$ 69	(319)	$ (69)
Ending Balance, shares at Dec. 31, 2018				534	(30)
Other Comprehensive Income (Loss), net of tax
Common Stock, Dividends, Per Share, Cash Paid	$ 1.80
Other Comprehensive Income (Loss), tax	$ (6)									1								(7)
Net Income	1,693	[1]				1,693				1,250					1,250			468			468
Other Comprehensive Income (Loss), net of tax	(31)							(31)		3							3	(13)					(13)
Comprehensive Income	1,662									1,253								455
Cash Dividends on Common Stock	(950)					(950)		0		(250)					(250)			(525)			(525)
Contributed Capital										0
Other	0			$ 23	$ (23)	0		0
Treasury Stock, Shares, Acquired				0	0
Ending Balance (in value) at Dec. 31, 2019	$ 15,089		$ (2)	$ 5,003	$ (831)	11,406	$ (2)	(489)		11,903	$ (2)	892	1,095	986	8,928	$ (2)	2	5,890	2,214	(986)	5,063		(401)
Ending Balance, shares at Dec. 31, 2019				534	(30)
Other Comprehensive Income (Loss), net of tax
Common Stock, Dividends, Per Share, Cash Paid	$ 1.88
Other Comprehensive Income (Loss), tax	$ (2)									(1)								(9)
Net Income	1,905	[1]				1,905				1,327					1,327			594			594
Other Comprehensive Income (Loss), net of tax	(15)							(15)		1							1	(18)					(18)
Comprehensive Income	1,890									1,328								576
Cash Dividends on Common Stock	(991)					(991)		0		(175)					(175)			(350)			(350)
Contributed Capital										75			75
Noncash Contribution																		96	96
Other	(2)			$ 28	$ (30)	0		0
Treasury Stock, Shares, Acquired				0	0
Ending Balance (in value) at Dec. 31, 2020	$ 15,984			$ 5,031	$ (861)	$ 12,318		$ (504)		13,129		$ 892	$ 1,170	$ 986	$ 10,078		$ 3	6,212	$ 2,310	$ (986)	$ 5,307		$ (419)
Ending Balance, shares at Dec. 31, 2020				534	(30)
Other Comprehensive Income (Loss), net of tax
Common Stock, Dividends, Per Share, Cash Paid	$ 1.96
Other Comprehensive Income (Loss), tax	$ 0									$ 0								$ 1

[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.