Pension, OPEB and Savings Plans (Narrative) (Details) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2024	Dec. 31, 2023 USD ($) plan	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of PSEG's defined contribution plans | plan					2
Defined benefit plan funded status of plan percentage					87.00%
Defined benefit plans, projected benefit and accumulated benefit obligations	$ 4,700				$ 4,700	$ 5,500
Maximum annual 401(k) contribution per employee, percent					50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match					50.00%
Total Employer Matching Contributions					$ 43	42	$ 44
Pension Lift Out Settlement Charge	6	$ 332			334
Pension Lift Out Settlement Charge, net of tax	4	$ 239			240
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	102				102	426
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Before Tax	$ 143				143	594
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)					$ 409	$ (115)	$ (82)
Discount Rate	5.02%		2.94%		5.02%	5.20%	2.94%
Expected long-term rate of return on plan assets					8.10%	7.20%	7.70%
Interest in Master Trust assets percentage					90.00%
Pension Lift Out Settlement Charge					$ 338	$ 0	$ 0
Other Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 140				140
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)					$ (43)	$ (124)	$ (96)
Discount Rate	4.96%		2.82%		4.96%	5.16%	2.82%
Expected long-term rate of return on plan assets					8.10%	7.20%	7.69%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 5				$ 5
Interest in Master Trust assets percentage					10.00%
Pension Lift Out Settlement Charge					$ 0	$ 0	$ 0
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets	54.00%				54.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets	28.00%				28.00%
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets	18.00%				18.00%
Real asset through equity securities percentage at year end	0.13				0.13
Thrift Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent					8.00%
Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent					7.00%
Long Island Electric Utility Servco LLC Pension and OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of PSEG's defined contribution plans | plan					2
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 25				$ 25
Maximum annual 401(k) contribution per employee, percent					50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match					50.00%
Employer matching contribution, percent					8.00%
Total Employer Matching Contributions					$ 10	9	9
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)					$ 18	$ 30	$ 37
Discount Rate	5.13%		3.21%		5.13%	5.30%	3.21%
Expected long-term rate of return on plan assets					8.00%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			$ 11		$ 12	$ 10
Discount Rate	5.16%		3.28%		5.16%	5.34%	3.28%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets	60.00%				60.00%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets	25.00%				25.00%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets	15.00%				15.00%
Real asset through equity securities percentage at year end	0.15				0.15
Subsequent Event [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets				8.10%
Subsequent Event [Member] | Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets				8.00%