Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues		$ 3,755	$ 2,313
Net Income (Loss)	[1]	1,287	(2)
Property, Plant and Equipment, Additions		739	686
Total Assets		49,409		$ 48,718
Investments in Equity Method Subsidiaries		303		306
Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		2,293	2,284
PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues	[2]	2,027	613
Operating Segments [Member] | Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		2,293	2,284
Net Income (Loss)		487	509
Property, Plant and Equipment, Additions		676	628
Total Assets		41,095		39,960
Investments in Equity Method Subsidiaries		0		0
Operating Segments [Member] | PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues		2,027	613
Net Income (Loss)	[1]	800	(511)
Property, Plant and Equipment, Additions		63	58
Total Assets		8,869		9,285
Investments in Equity Method Subsidiaries		303		306
non trading commodity mark to market gains (losses), net of tax		555	(608)
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3]	(565)	(584)
Net Income (Loss)	[3]	0	0
Property, Plant and Equipment, Additions	[3]	0	$ 0
Total Assets	[3]	(555)		(527)
Investments in Equity Method Subsidiaries	[3]	$ 0		$ 0

[1] Includes net after-tax gains of $555 million and net after-tax losses of $608 million for the three months ended March 31, 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.