Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues		$ 2,760	$ 3,755
Net Income (Loss)	[1]	532	1,287
Gross Addition to Long-Lived Assets		797	739
Total Assets		52,388		$ 50,741
Investments in Equity Method Subsidiaries		17		17
Operating Segments [Member] | Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		2,333	2,293
Net Income (Loss)		488	487
Gross Addition to Long-Lived Assets		739	676
Total Assets		43,592		42,873
Investments in Equity Method Subsidiaries		0		0
Operating Segments [Member] | PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues	[2]	872	2,027
Net Income (Loss)	[1]	44	800
Gross Addition to Long-Lived Assets		58	63
Total Assets		9,335		8,407
Investments in Equity Method Subsidiaries		17		17
non trading commodity mark to market gains (losses), net of tax		(186)	555
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3]	(445)	(565)
Net Income (Loss)	[3]	0	0
Gross Addition to Long-Lived Assets	[3]	0	$ 0
Total Assets	[3]	(539)		(539)
Investments in Equity Method Subsidiaries	[3]	$ 0		$ 0

[1] Includes net after-tax gains (losses) of $(186) million and $555 million for the three months ended March 31, 2024 and 2023, 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 18. Related-Party Transactions.