Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues		$ 2,423	$ 2,421	$ 5,183	$ 6,176
Net Income	[1]	434	591	966	1,878
Gross Addition to Long-Lived Assets		837	705	1,634	1,444
Total Assets		52,382		52,382		$ 50,741
Investments in Equity Method Subsidiaries		20		20		17
Operating Segments [Member] | Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		1,863	1,662	4,196	3,955
Net Income		302	336	790	823
Gross Addition to Long-Lived Assets		746	660	1,485	1,336
Total Assets		44,490		44,490		42,873
Investments in Equity Method Subsidiaries		0		0		0
Operating Segments [Member] | PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues	[2]	685	902	1,557	2,929
Net Income	[1]	132	255	176	1,055
Gross Addition to Long-Lived Assets		91	45	149	108
Total Assets		8,393		8,393		8,407
Investments in Equity Method Subsidiaries		20		20		17
non trading commodity mark to market gains (losses), net of tax		114	212	(72)	767
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3]	(125)	(143)	(570)	(708)
Net Income	[3]	0	0	0	0
Gross Addition to Long-Lived Assets	[3]	0	$ 0	0	$ 0
Total Assets	[3]	(501)		(501)		(539)
Investments in Equity Method Subsidiaries	[3]	$ 0		$ 0		$ 0

[1] Includes net after-tax gains (losses) of $114 million and $212 million for the three months and $(72) million and $767 million for the six months ended June 30, 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.