Financial Information By Business Segments - Financial Information By Business Segments (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues		$ 2,642,000,000	$ 2,456,000,000	$ 7,825,000,000	$ 8,632,000,000
NET INCOME	[1]	520,000,000	139,000,000	1,486,000,000	2,017,000,000
Gross Addition to Long-Lived Assets		768,000,000	916,000,000	2,402,000,000	2,360,000,000
Total Assets		54,080,000,000		54,080,000,000		$ 50,741,000,000
Investments in Equity Method Subsidiaries		22,000,000		22,000,000		17,000,000
Operating Segments [Member] | Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		2,139,000,000	1,999,000,000	6,335,000,000	5,954,000,000
NET INCOME	[1]	379,000,000	401,000,000	1,169,000,000	1,224,000,000
Gross Addition to Long-Lived Assets		672,000,000	813,000,000	2,157,000,000	2,149,000,000
Total Assets		45,784,000,000		45,784,000,000		42,873,000,000
Investments in Equity Method Subsidiaries		0		0		0
Operating Segments [Member] | PSEG Power & Other [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[2]	583,000,000	546,000,000	2,140,000,000	3,475,000,000
NET INCOME	[1]	141,000,000	(262,000,000)	317,000,000	793,000,000
Gross Addition to Long-Lived Assets		96,000,000	103,000,000	245,000,000	211,000,000
Total Assets		8,550,000,000		8,550,000,000		8,407,000,000
Investments in Equity Method Subsidiaries		22,000,000		22,000,000		17,000,000
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3]	(80,000,000)	(89,000,000)	(650,000,000)	(797,000,000)
NET INCOME	[1],[3]	0	0	0	0
Gross Addition to Long-Lived Assets	[3]	0	$ 0	0	$ 0
Total Assets	[3]	(254,000,000)		(254,000,000)		(539,000,000)
Investments in Equity Method Subsidiaries	[3]	$ 0		$ 0		$ 0

[1] Includes net after-tax gains (losses) of $17 million and $(17) million for the three months and $(55) million and $750 million for the nine months ended September 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.