Pension, OPEB and Savings Plans (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2023	Dec. 31, 2022 USD ($) plan	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
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			$ 5,500	$ 7,100
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			$ 42	44	$ 43
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax			426	355
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Before Tax			594	495
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			$ (115)	$ (82)	$ (28)
Discount Rate	2.61%		5.20%	2.94%	2.61%
Expected long-term rate of return on plan assets			7.20%	7.70%	7.70%
Interest in Master Trust assets percentage			92.00%
Other Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation			$ 137
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			$ (124)	$ (96)	$ (77)
Discount Rate	2.46%		5.16%	2.82%	2.46%
Expected long-term rate of return on plan assets			7.20%	7.69%	7.70%
Interest in Master Trust assets percentage			8.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets			54.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage of assets			28.00%
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			0.12
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			$ 18
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			$ 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)	$ 30		$ 30	$ 37
Discount Rate	2.98%		5.30%	3.21%	2.98%
Expected long-term rate of return on plan assets			7.60%
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)			$ 10	$ 11	$ 9
Discount Rate	3.08%		5.34%	3.28%	3.08%
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] | 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] | 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
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%