Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues [Line Items]
Revenue from Contract with Customers		$ 2,527	$ 2,364	$ 7,411	$ 7,021
Revenues Unrelated to Contracts with Customers	[1]	115	92	414	1,611
Total Operating Revenues		2,642	2,456	7,825	8,632
Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		(80)	(89)	(650)	(797)
Revenues Unrelated to Contracts with Customers	[1]	0	0	0	0
Total Operating Revenues	[2]	(80)	(89)	(650)	(797)
Electric Distribution Contracts [Member]
Revenues [Line Items]
Revenue from Contract with Customers		1,406	1,281	3,170	2,795
Electric Distribution Contracts [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Gas Distribution [Member]
Revenues [Line Items]
Revenue from Contract with Customers		162	147	1,385	1,380
Gas Distribution [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Electric Transmission [Member]
Revenues [Line Items]
Revenue from Contract with Customers		441	422	1,313	1,251
Electric Transmission [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member]
Revenues [Line Items]
Revenue from Contract with Customers		206	216	600	703
Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		(48)	(32)	(87)	(90)
Electricity and Related Products [Member] | ISO New England [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	3	5	9
Electricity and Related Products [Member] | ISO New England [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Gas Sales [Member] | Third Party Sales [Member]
Revenues [Line Items]
Revenue from Contract with Customers		45	44	155	156
Gas Sales [Member] | Third Party Sales [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Gas Sales [Member] | Sales to Affiliates [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Gas Sales [Member] | Sales to Affiliates [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers		(31)	(55)	(559)	(703)
Other Revenues from Contracts with Customers [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[3]	267	251	783	727
Other Revenues from Contracts with Customers [Member] | Eliminations [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[3]	(1)	(2)	(4)	(4)
Public Service Electric and Gas Company [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		2,096	1,940	6,131	5,688
Revenues Unrelated to Contracts with Customers	[1]	43	59	204	266
Total Operating Revenues		2,139	1,999	6,335	5,954
Public Service Electric and Gas Company [Member] | Electric Distribution Contracts [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		1,406	1,281	3,170	2,795
Public Service Electric and Gas Company [Member] | Gas Distribution [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		162	147	1,385	1,380
Public Service Electric and Gas Company [Member] | Electric Transmission [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		441	422	1,313	1,251
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | ISO New England [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Public Service Electric and Gas Company [Member] | Gas Sales [Member] | Third Party Sales [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Public Service Electric and Gas Company [Member] | Gas Sales [Member] | Sales to Affiliates [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers		0	0	0	0
Public Service Electric and Gas Company [Member] | Other Revenues from Contracts with Customers [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[3]	87	90	263	262
PSEG Power & Other | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	511	513	1,930	2,130
Revenues Unrelated to Contracts with Customers	[1],[4]	72	33	210	1,345
Total Operating Revenues	[4]	583	546	2,140	3,475
PSEG Power & Other | Electric Distribution Contracts [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	0	0	0	0
PSEG Power & Other | Gas Distribution [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	0	0	0	0
PSEG Power & Other | Electric Transmission [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	0	0	0	0
PSEG Power & Other | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	206	216	600	703
PSEG Power & Other | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	48	32	87	90
PSEG Power & Other | Electricity and Related Products [Member] | ISO New England [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	0	3	5	9
PSEG Power & Other | Gas Sales [Member] | Third Party Sales [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	45	44	155	156
PSEG Power & Other | Gas Sales [Member] | Sales to Affiliates [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[4]	31	55	559	703
PSEG Power & Other | Other Revenues from Contracts with Customers [Member] | Operating Segments [Member]
Revenues [Line Items]
Revenue from Contract with Customers	[3],[4]	$ 181	$ 163	$ 524	$ 469

[1] Includes primarily alternative revenues at PSE&G principally from the CIP program and derivative contracts and lease contracts at PSEG Power & Other.

[2] 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.

[3] Includes primarily revenues from appliance repair services and the sale of solar renewable energy credits (SRECs) at auction at PSE&G. PSEG Power & Other includes PSEG LI’s OSA with LIPA and PSEG Power’s energy management fee with LIPA.

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