Pension and Other Postretirement Benefits (OPEB) - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Pension Lift Out Settlement Charge		$ 332
Pension Lift Out Settlement Charge, net of tax		239		$ 239
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		1,000
Pension Lift Out Settlement Charge	$ 0	332	$ 0	332
Total benefit costs	18	349	52	389
Pension Plan [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs	11	10	32	37
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Lift Out Settlement Charge	0	0	0	0
Total benefit costs	1	(11)	4	(32)
Defined benefit plan, expected future employer contributions, current fiscal year	5		5
Postretirement Healthcare Plans [Member] | Public Service Electric and Gas Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs	0	(11)	(1)	(31)
Long Island Electric Utility Servco LLC Pension and OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected future employer contributions, current fiscal year	25		25
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs	12	9	25	18
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Total benefit costs	$ 3	$ 3	$ 10	$ 9