Pension, Other Postretirement Benefits (OPEB) and Savings Plans - Additional Information (Details) $ in Millions		3 Months Ended		12 Months Ended
	Jan. 01, 2025	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) Retiree	Dec. 31, 2025	Dec. 31, 2024 USD ($) Plan	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of PSEG's defined contribution plans | Plan					2
Defined benefit plan funded status of plan percentage					89.00%
Rabbi trust fund		$ 179			$ 165	$ 179
Defined benefit plan funded status of plan qualified pension plan percentage					92.00%
Defined benefit plans, projected benefit and accumulated benefit obligations		4,700			$ 4,400	4,700
Pension Lift Out Settlement Charge		6	$ 332
Pension lift out settlement charge, net of tax		4	239			239
Maximum annual 401(k) contribution per employee, percent					50.00%
Defined contribution plan, employer matching contribution, percent of match					50.00%
Employer matching contributions					$ 45	43	$ 42
Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Non-elective employer contributions	4.00%
Defined contribution plan, employer matching contribution, percent of match	4.00%
Employer matching contribution, percent	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets					54.00%
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets					18.00%
Real asset through equity securities percentage at year end					0.13
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets					28.00%
Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Rabbi trust fund		$ 32			$ 30	32
Employer matching contributions					31	29	28
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement			$ 1,000		0	(970)
Number of retirees | Retiree			2,000
Total benefit costs					69	409	(115)
Pension Lift Out Settlement Charge					$ 0	$ 338	$ 0
Interest in Master Trust assets percentage					90.00%
Expected long-term rate of return on plan assets					8.10%	8.10%	7.20%
Defined benefit plan, expected future employer contributions, next fiscal year					$ 100
Pension Benefits [Member] | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets				8.10%
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs					43	$ 50	$ (70)
Other Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation					132
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement					0	0
Total benefit costs					6	(43)	(124)
Pension Lift Out Settlement Charge					$ 0	$ 0	$ 0
Interest in Master Trust assets percentage					10.00%
Expected long-term rate of return on plan assets					8.10%	8.10%	7.20%
Defined benefit plan, expected future employer contributions, next fiscal year					$ 5
Other Benefits [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs					$ (2)	$ (42)	$ (109)
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					$ 23
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%
Employer matching contributions					$ 13	10	9
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%
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%
Real asset through equity securities percentage at year end					0.15
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%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs					$ 25	18	30
Expected long-term rate of return on plan assets					8.00%
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member] | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
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]
Total benefit costs					$ 14	$ 12	$ 10
Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent					7.00%
Thrift Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent					8.00%