Pension, OPEB and Savings Plans (Changes In The Benefit Obligation And The Fair Value Of Plan Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Deferred Costs and Other Assets		$ 8,383		$ 8,835
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year	[1]	6,921
Fair Value of Assets at End of Year	[1]	7,499		6,921
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued Benefit Cost		(174)		(226)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Before Tax		495		760
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax		355		545
Regulatory Assets		1,043		1,489
Deferred Costs and Other Assets		117		159
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	[2]	7,507		6,892
Service Cost		151		141		$ 123
Interest Cost		140		192		218
Actuarial (Gain) Loss	[3]	(199)		615
Gross Benefits Paid		(359)		(333)
Plan Assumptions		0		0
Benefit Obligation at End of Year	[2]	7,240		7,507		6,892
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year		6,368		5,929
Actual Return on Plan Assets		886		761
Employer Contributions		11		11
Gross Benefits Paid		(359)		(333)
Fair Value of Assets at End of Year		6,906		6,368		5,929
Funded Status (Plan Assets less Benefit Obligation)		(334)		(1,139)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Current Accrued Benefit Cost		(16)	[4]	(11)
Accrued Benefit Cost		(318)		(1,128)
Amounts Recognized		(334)		(1,139)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Prior Service Cost		0		0
Net Actuarial Loss		1,643		2,354
Total	[5]	(1,643)		(2,354)
Liability, Defined Benefit Plan, Current portion held for sale		5
Other Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	[2]	1,306		1,285
Service Cost		9		9		10
Interest Cost		22		34		45
Actuarial (Gain) Loss	[3]	(90)		32
Gross Benefits Paid		(50)		(50)
Plan Assumptions		0		(4)
Benefit Obligation at End of Year	[2]	1,197		1,306		1,285
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year		564		540
Actual Return on Plan Assets		79		70
Employer Contributions		13		4
Gross Benefits Paid		(50)		(50)
Fair Value of Assets at End of Year		606		564		540
Funded Status (Plan Assets less Benefit Obligation)		(591)		(742)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Current Accrued Benefit Cost		(19)	[4]	(12)
Accrued Benefit Cost		(572)		(730)
Amounts Recognized		(591)		(742)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Prior Service Cost		(181)		(310)
Net Actuarial Loss		193		364
Total	[5]	(12)		(54)
Liability, Defined Benefit Plan, Current portion held for sale		7
Long Island Electric Utility Servco LLC Pension and OPEB [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year		343
Fair Value of Assets at End of Year		422		343
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Pension Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year		569	[6]	453
Service Cost		38		33
Interest Cost		14		14
Actuarial (Gain) Loss		(18)		74
Gross Benefits Paid		(7)		(5)
Plan Assumptions		0		0
Benefit Obligation at End of Year		596	[6]	569	[6]	453
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year		343		282
Actual Return on Plan Assets		49		36
Employer Contributions		37		30
Gross Benefits Paid		(7)		(5)
Fair Value of Assets at End of Year		422		343		282
Funded Status (Plan Assets less Benefit Obligation)		(174)		(226)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued Benefit Cost		(174)		(226)
Amounts Recognized	[7]	(174)		(226)
Long Island Electric Utility Servco LLC Pension and OPEB [Member] | Other Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year		699	[6]	626
Service Cost		23		20
Interest Cost		18		20
Actuarial (Gain) Loss		(89)		42
Gross Benefits Paid		(11)		(9)
Plan Assumptions		0		0
Benefit Obligation at End of Year		640	[6]	699	[6]	626
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year		0		0
Actual Return on Plan Assets		0		0
Employer Contributions		11		9
Gross Benefits Paid		(11)		(9)
Fair Value of Assets at End of Year		0		0		$ 0
Funded Status (Plan Assets less Benefit Obligation)		(640)		(699)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued Benefit Cost		(640)		(699)
Amounts Recognized	[7]	$ (640)		$ (699)

[1] Excludes net receivables of $11 million and $10 million as of December 31, 2021 and 2020, respectively, which consist of interest, dividends and receivables and payables related to pending securities sales and purchases. In addition, the table excludes cash and foreign currency of $2 million and $1 million as of December 31, 2021 and 2020, respectively.

[2] Represents projected benefit obligation for pension benefits and the accumulated postretirement benefit obligation for other benefits. The vested benefit obligation is the actuarial present value of the vested benefits to which the employee is currently entitled but based on the employee’s expected date of separation or retirement.

[3] For pension benefits, the net actuarial gain in 2021 was due primarily to an increase in the discount rate. For OPEB, the net actuarial gain in 2021 was due primarily to an increase in the discount rate coupled with lower than expected claims experience. For pension benefits, the net actuarial loss in 2020 was due primarily to a decrease in the discount rate. For OPEB, the net actuarial loss in 2020 was due primarily to a decrease in the discount rate, partially offset by actuarial gains driven by lower than expected claims experience.

[4] Includes ($5) million and ($7) million for pension benefits and other benefits, respectively, as of December 31, 2021 classified as Held for Sale. For additional information, see Note 4. Early Plant Retirements/Asset Dispositions and Impairments.

[5] Includes $495 million ($355 million, after-tax) and $760 million ($545 million, after-tax) in Accumulated Other Comprehensive Loss related to Pension and OPEB as of December 31, 2021 and 2020, respectively. Also includes Regulatory Assets of $1,043 million and Deferred Assets of $117 million as of December 31, 2021 and Regulatory Assets of $1,489 million and Deferred Assets of $159 million as of December 31, 2020

[6] Represents projected benefit obligation for pension benefits and the accumulated postretirement benefit obligation for other benefits. The vested benefit obligation is the actuarial present value of the vested benefits to which the employee is currently entitled but based on the employee’s expected date of separation or retirement.(B)For pension benefits, the net actuarial gain in 2021 was due primarily to an increase in the discount rate. For OPEB, the net actuarial gain in 2021 was due primarily to updated assumptions. For pension benefits, the net actuarial loss in 2020 was due primarily to a decrease in the discount rate. For OPEB, the net actuarial loss in 2020 was due primarily to a decrease in the discount rate, partially offset by actuarial gains driven by lower than expected participation experience.

[7] Amounts equal to the accrued pension and OPEB costs of Servco are offset in Long-Term Receivable of VIE on PSEG’s Consolidated Balance Sheets.