Revenues (Details) $ in Millions		12 Months Ended
		Dec. 31, 2021 USD ($) $ / mwd MW	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 01, 2020 USD ($)
Lease losses included in Revenues		$ 9	$ 26	$ 58
Revenue from Contract with Customer, Including Assessed Tax		10,315	9,099	9,308
Revenues Unrelated to Contracts with Customers	[1]	(593)	504	768
Operating Revenues		9,722	9,603	10,076
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		(1,167)	(1,234)	(1,483)
Revenues Unrelated to Contracts with Customers		0	0	0
Operating Revenues	[2]	(1,167)	(1,234)	(1,483)
Public Service Electric and Gas Company
Operating Revenues		7,122	6,608	6,625
Accounts Receivable and Unbilled Revenues, Allowance for Credit Losses		337
Provision for Other Credit Losses		195	175
Accounts Receivable, Allowance for Credit Loss, Writeoff		(64)	(37)
Accounts Receivable, Allowance for Credit Loss, Recovery		17	5
Accounts Receivable, Allowance for Credit Loss		206
Public Service Electric and Gas Company | Cumulative Effect, Period of Adoption, Adjustment
Accounts Receivable and Unbilled Revenues, Allowance for Credit Losses					$ 8
Public Service Electric and Gas Company | Cumulative Effect, Period of Adoption, Adjusted Balance
Accounts Receivable and Unbilled Revenues, Allowance for Credit Losses			206		$ 68
Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		7,108	6,599	6,559
Revenues Unrelated to Contracts with Customers		14	9	66
Operating Revenues		$ 7,122	$ 6,608	6,625
Allowances percentage of accounts receivable		21.00%	14.00%
PSEG Power LLC [Member]
Revenue, remaining performance obligation, amount		$ 109
Other Segments
Revenue from Contract with Customer, Including Assessed Tax		4,374	$ 3,734	4,232
Revenues Unrelated to Contracts with Customers		(607)	495	702
Operating Revenues		3,767	4,229	4,934
LIPA OSA contract fixed component [Member] | Other [Member]
Revenue, remaining performance obligation, amount		70
Electric Distribution Contracts [Member]
Revenue from Contract with Customer, Including Assessed Tax		3,279	3,130	3,224
Electric Distribution Contracts [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Electric Distribution Contracts [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		3,279	3,130	3,224
Electric Distribution Contracts [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Gas Distribution Contracts [Member]
Revenue from Contract with Customer, Including Assessed Tax		1,862	1,634	1,855
Gas Distribution Contracts [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		(13)	(12)	(15)
Gas Distribution Contracts [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		1,875	1,646	1,870
Gas Distribution Contracts [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Transmission [Member]
Revenue from Contract with Customer, Including Assessed Tax		1,611	1,485	1,181
Transmission [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Transmission [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		1,611	1,485	1,181
Transmission [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Other Contract Revenues [Member]
Revenue from Contract with Customer, Including Assessed Tax	[3]	960	966	891
Other Contract Revenues [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		(3)	(4)	(5)
Other Contract Revenues [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		343	338	284
Other Contract Revenues [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		620	632	612
ISO New England [Member] | Electricity and Related Products [Member]
Revenue from Contract with Customer, Including Assessed Tax		172	126	137
ISO New England [Member] | Electricity and Related Products [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
ISO New England [Member] | Electricity and Related Products [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
ISO New England [Member] | Electricity and Related Products [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		172	126	137
NY ISO [Member] | Electricity and Related Products [Member]
Revenue from Contract with Customer, Including Assessed Tax		247	124	143
NY ISO [Member] | Electricity and Related Products [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
NY ISO [Member] | Electricity and Related Products [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
NY ISO [Member] | Electricity and Related Products [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		247	124	143
Third Party Sales [Member] | Natural Gas [Member]
Revenue from Contract with Customer, Including Assessed Tax		181	83	92
Third Party Sales [Member] | Natural Gas [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Third Party Sales [Member] | Natural Gas [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Third Party Sales [Member] | Natural Gas [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		181	83	92
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member]
Revenue from Contract with Customer, Including Assessed Tax		2,003	1,551	1,785
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		2,003	1,551	1,785
Sales to Affiliates [Member] | Natural Gas [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Sales to Affiliates [Member] | Natural Gas [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		(886)	(771)	(927)
Sales to Affiliates [Member] | Natural Gas [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Sales to Affiliates [Member] | Natural Gas [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		886	771	927
Sales to Affiliates [Member] | PJM [Member] | Electricity and Related Products [Member]
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Sales to Affiliates [Member] | PJM [Member] | Electricity and Related Products [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax		(265)	(447)	(536)
Sales to Affiliates [Member] | PJM [Member] | Electricity and Related Products [Member] | Public Service Electric and Gas Company
Revenue from Contract with Customer, Including Assessed Tax		0	0	0
Sales to Affiliates [Member] | PJM [Member] | Electricity and Related Products [Member] | Other Segments
Revenue from Contract with Customer, Including Assessed Tax		$ 265	$ 447	$ 536
June 2019 to May 2020 [Member] | ISO New England [Member] | PSEG Power LLC [Member]
Dollars Per Megawatt-Day | $ / mwd		231
June 2021 to May 2022 [Member] | PJM [Member]
Dollars Per Megawatt-Day | $ / mwd		166
Load (MW) | MW		7,700
June 2021 to May 2022 [Member] | ISO New England [Member]
Dollars Per Megawatt-Day | $ / mwd		192
Load (MW) | MW		950
June 2022 to May 2023 [Member] | PJM [Member]
Dollars Per Megawatt-Day | $ / mwd		98
Load (MW) | MW		6,300
June 2022 to May 2023 [Member] | ISO New England [Member]
Dollars Per Megawatt-Day | $ / mwd		179
Load (MW) | MW		950
June 2023 to May 2024 [Member] | ISO New England [Member]
Dollars Per Megawatt-Day | $ / mwd		152
Load (MW) | MW		930
June 2024 to May 2025 [Member] | ISO New England [Member]
Dollars Per Megawatt-Day | $ / mwd		158
Load (MW) | MW		950
June 2025 to May 2026 [Member] | ISO New England [Member]
Dollars Per Megawatt-Day | $ / mwd		231
Load (MW) | MW		480
Expected to be transferred upon sale of Fossil | PSEG Power LLC [Member]
Revenue, remaining performance obligation, amount		$ 44

[1] Includes primarily alternative revenues at PSE&G and derivative contracts and lease contracts in Other. For the years ended December 31, 2021, 2020 and 2019, Other includes losses of $9 million, $26 million and $58 million, respectively, related to Energy Holdings’ investments in leases. For additional information, see Note 9. Long-Term Investments.

[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 26. Related-Party Transactions.

[3] Includes primarily revenues from appliance repair services and the sale of SRECs at auction at PSE&G, PSEG Power’s solar power projects and energy management and fuel service contracts with LIPA and PSEG LI’s OSA with LIPA in Other.