Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues		$ 2,421	$ 2,076	$ 6,176	$ 4,389
Net Income (Loss)	[1]	591	131	1,878	129
Property, Plant and Equipment, Additions		705	605	1,444	1,291
Total Assets		49,505		49,505		$ 48,718
Investments in Equity Method Subsidiaries		15		15		306
Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		1,662	1,668	3,955	3,952
PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues	[2]	902	645	2,929	1,258
Operating Segments [Member] | Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		1,662	1,668	3,955	3,952
Net Income (Loss)		336	305	823	814
Property, Plant and Equipment, Additions		660	543	1,336	1,171
Total Assets		41,347		41,347		39,960
Investments in Equity Method Subsidiaries		0		0		0
Operating Segments [Member] | PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues		902	645	2,929	1,258
Net Income (Loss)	[1]	255	(174)	1,055	(685)
Property, Plant and Equipment, Additions		45	62	108	120
Total Assets		8,505		8,505		9,285
Investments in Equity Method Subsidiaries		15		15		306
non trading commodity mark to market gains (losses), net of tax		212	(74)	767	(682)
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3]	(143)	(237)	(708)	(821)
Net Income (Loss)	[3]	0	0	0	0
Property, Plant and Equipment, Additions	[3]	0	$ 0	0	$ 0
Total Assets	[3]	(347)		(347)		(527)
Investments in Equity Method Subsidiaries	[3]	$ 0		$ 0		$ 0

[1] Includes net after-tax gains (losses) of $212 million and $(74) million for the three months and $767 million and $(682) million for the six months ended June 30, 2023 and 2022, respectively, at PSEG Power related to the impacts of non-trading commodity mark-to-market activity, which consist of the financial impact from positions with future delivery dates.

[2] Includes revenues applicable to PSEG Power, PSEG LI and Energy Holdings.

[3] Intercompany eliminations primarily relate to intercompany transactions between PSE&G and PSEG Power. For a further discussion of the intercompany transactions between PSE&G and PSEG Power, see Note 19. Related-Party Transactions.