Financial Information By Business Segments - Financial Information By Business Segments (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Operating Revenues		$ 2,805	$ 2,423	$ 6,027	$ 5,183
Energy Costs		826	732	2,012	1,729
Controllable Operation and Maintenance (C)	[1]	516	527	1,049	1,000
Depreciation and Amortization		308	285	628	580
Interest Income		13	13	21	22
Interest Expense		248	218	489	423
Income Tax Expense (Benefit)		141	3	169	100
Other Segment Items (D)	[2]	194	237	527	407
Net Income (Loss)		585	434	1,174	966
Gross Additions to Long-Lived Assets		787	837	1,415	1,634
Total Assets		56,024		56,024		$ 54,640
Investments in Equity Method Subsidiaries		24		24		21
Operating Segments [Member] | Public Service Electric and Gas Company [Member]
Segment Reporting Information [Line Items]
Operating Revenues		2,031	1,863	4,695	4,196
Energy Costs		760	683	1,854	1,611
Controllable Operation and Maintenance (C)	[1]	331	323	685	636
Depreciation and Amortization		275	247	555	504
Interest Income		5	2	9	6
Interest Expense		161	141	318	279
Income Tax Expense (Benefit)		33	59	77	151
Other Segment Items (D)	[2]	144	110	337	231
Net Income (Loss)		332	302	878	790
Gross Additions to Long-Lived Assets		674	746	1,279	1,485
Total Assets		47,789		47,789		46,364
Investments in Equity Method Subsidiaries		0		0		0
Operating Segments [Member] | PSEG Power & Other [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3],[4]	920	685	2,012	1,557
Energy Costs	[4]	212	174	838	688
Controllable Operation and Maintenance (C)	[1],[4]	185	204	364	364
Depreciation and Amortization	[4]	33	38	73	76
Interest Income	[4]	9	13	14	19
Interest Expense	[4]	88	79	173	147
Income Tax Expense (Benefit)	[4]	108	(56)	92	(51)
Other Segment Items (D)	[2],[4]	50	127	190	176
Net Income (Loss)	[4]	253	132	296	176
Gross Additions to Long-Lived Assets	[4]	113	91	167	149
Total Assets	[4]	8,652		8,652		8,673
Investments in Equity Method Subsidiaries	[4]	24		24		21
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[5]	(146)	(125)	(680)	(570)
Energy Costs	[5]	(146)	(125)	(680)	(570)
Controllable Operation and Maintenance (C)	[1],[5]	0	0	0	0
Depreciation and Amortization	[5]	0	0	0	0
Interest Income	[5]	(1)	(2)	(2)	(3)
Interest Expense	[5]	(1)	(2)	(2)	(3)
Income Tax Expense (Benefit)	[5]	0	0	0	0
Other Segment Items (D)	[2],[5]	0	0	0	0
Net Income (Loss)	[5]	0	0	0	0
Gross Additions to Long-Lived Assets	[5]	0	$ 0	(31)	$ 0
Total Assets	[5]	(417)		(417)		(397)
Investments in Equity Method Subsidiaries	[5]	$ 0		$ 0		$ 0

[1] Controllable Operation and Maintenance expense includes amounts for labor and benefit costs, materials, outside services and other normal operational costs, including intersegment amounts, and is the significant expense information that is regularly provided to the Chief Operating Decision Maker (the Chief Executive Officer (CEO) for PSEG and PSE&G).

[2] Other Segment Items include all other items to reconcile to Net Income. This includes all other O&M (primarily related to clause related expenditures at PSE&G and expenditures for transactions in which Servco acts as principal and controls the services provided to LIPA at PSEG Power & Other, each of which offset corresponding revenue amounts in those segments), non-operating pension and OPEB credits and costs, gains and losses on trust investments and other income and deductions.

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

[4] PSEG Power & Other results include net after-tax gains (losses) of $136 million and $114 million for the three months and $1 million and $(72) million for the six months ended June 30, 2025 and 2024, respectively, related to the impacts of non-trading commodity mark-to-market activity, which consists of the financial impact from positions with future delivery dates.

[5] 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 2. Revenues and Note 17. Related-Party Transactions.