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Pension, Other Postretirement Benefits (OPEB) and Savings Plans - Changes in Benefit Obligation and Fair Value of Plan Assets (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |
Fair Value of Assets at Beginning of Year | [1] |  | $ 4,578 |  |
Fair Value of Assets at End of Year | [1] |  | 4,394 | $ 4,578 |
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 |  |  | 433 |  |
Fair Value of Assets at End of Year |  |  | 490 | 433 |
Pension Benefits [Member] |  |  |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |
Benefit Obligation at Beginning of Year | [2] |  | 4,758 | 5,628 |
Service Cost |  |  | 94 | 90 | $ 142
Interest Cost |  |  | 225 | 259 | 167
Actuarial (Gain) Loss | [3] |  | (291) | 103 |
Gross Benefits Paid |  |  | (309) | (352) |
Settlements |  | $ 1,000 | 0 | (970) |
Other |  |  | 0 | 0 |
Benefit Obligation at End of Year | [2] |  | 4,477 | 4,758 | 5,628
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |
Fair Value of Assets at Beginning of Year |  |  | 4,140 | 4,911 |
Actual Return on Plan Assets |  |  | 134 | 539 |
Employer Contributions |  |  | 13 | 12 |
Gross Benefits Paid |  |  | (309) | (352) |
Settlements |  |  | 0 | (970) |
Fair Value of Assets at End of Year |  |  | 3,978 | 4,140 | 4,911
Funded Status (Plan Assets less Benefit Obligation) |  |  | (499) | (618) |
Additional Amounts Recognized in the Consolidated Balance Sheets |  |  |  |  |
Current Accrued Benefit Cost |  |  | (11) | (12) |
Noncurrent Accrued Benefit Cost |  |  | (488) | (606) |
Amounts Recognized |  |  | (499) | (618) |
Additional Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Regulated Assets, Deferred Assets and Deferred Liabilities |  |  |  |  |
Prior Service Cost (Credit) | [4] |  | 0 | 0 |
Net Actuarial Loss (Gain) | [4] |  | 1,481 | 1,656 |
Total | [4] |  | 1,481 | 1,656 |
Pension Benefits [Member] | Long Island Electric Utility Servco LLC Pension and OPEB [Member] |  |  |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |
Benefit Obligation at Beginning of Year | [5] |  | 535 | 452 |
Service Cost |  |  | 28 | 24 |
Interest Cost |  |  | 26 | 23 |
Actuarial (Gain) Loss | [6] |  | (54) | 31 |
Plan Assumptions |  |  | 0 | 16 |
Gross Benefits Paid |  |  | (14) | (11) |
Benefit Obligation at End of Year | [5] |  | 521 | 535 | 452
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |
Fair Value of Assets at Beginning of Year |  |  | 433 | 370 |
Actual Return on Plan Assets |  |  | 46 | 56 |
Employer Contributions |  |  | 25 | 18 |
Gross Benefits Paid |  |  | (14) | (11) |
Fair Value of Assets at End of Year |  |  | 490 | 433 | 370
Funded Status (Plan Assets less Benefit Obligation) |  |  | (31) | (102) |
Additional Amounts Recognized in the Consolidated Balance Sheets |  |  |  |  |
Noncurrent Accrued Benefit Cost |  |  | (31) | (102) |
Amounts Recognized | [7] |  | (31) | (102) |
Other Benefits [Member] |  |  |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |
Benefit Obligation at Beginning of Year | [2] |  | 802 | 851 |
Service Cost |  |  | 3 | 3 | 6
Interest Cost |  |  | 37 | 41 | 26
Actuarial (Gain) Loss | [3] |  | (39) | (30) |
Gross Benefits Paid |  |  | (76) | (68) |
Settlements |  |  | 0 | 0 |
Other |  |  | 0 | 5 |
Benefit Obligation at End of Year | [2] |  | 727 | 802 | 851
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |
Fair Value of Assets at Beginning of Year |  |  | 440 | 429 |
Actual Return on Plan Assets |  |  | 18 | 51 |
Employer Contributions |  |  | 41 | 28 |
Gross Benefits Paid |  |  | (76) | (68) |
Settlements |  |  | 0 | 0 |
Fair Value of Assets at End of Year |  |  | 423 | 440 | 429
Funded Status (Plan Assets less Benefit Obligation) |  |  | (304) | (362) |
Additional Amounts Recognized in the Consolidated Balance Sheets |  |  |  |  |
Current Accrued Benefit Cost |  |  | (12) | (13) |
Noncurrent Accrued Benefit Cost |  |  | (292) | (349) |
Amounts Recognized |  |  | (304) | (362) |
Additional Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Regulated Assets, Deferred Assets and Deferred Liabilities |  |  |  |  |
Prior Service Cost (Credit) | [4] |  | 4 | 6 |
Net Actuarial Loss (Gain) | [4] |  | (26) | (6) |
Total | [4] |  | (22) | 0 |
Other Benefits [Member] | Long Island Electric Utility Servco LLC Pension and OPEB [Member] |  |  |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |
Benefit Obligation at Beginning of Year | [5] |  | 514 | 455 |
Service Cost |  |  | 14 | 12 |
Interest Cost |  |  | 25 | 24 |
Actuarial (Gain) Loss | [6] |  | (29) | 35 |
Plan Assumptions |  |  | 0 | 0 |
Gross Benefits Paid |  |  | (14) | (12) |
Benefit Obligation at End of Year | [5] |  | 510 | 514 | 455
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 |  |  | 14 | 12 |
Gross Benefits Paid |  |  | (14) | (12) |
Fair Value of Assets at End of Year |  |  | 0 | 0 | $ 0
Funded Status (Plan Assets less Benefit Obligation) |  |  | (510) | (514) |
Additional Amounts Recognized in the Consolidated Balance Sheets |  |  |  |  |
Noncurrent Accrued Benefit Cost |  |  | (510) | (514) |
Amounts Recognized | [7] |  | $ (510) | $ (514) |
[1] | Excludes net receivables of $6 million and $2 million as of December 31, 2024 and 2023, 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 $1 million as of December 31, 2024.
[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 and OPEB, the net actuarial gains in 2024 were due primarily to an increase in the discount rate, partially offset by actuarial losses driven by a lower than expected return on assets. For pension benefits, the net actuarial loss in 2023 was due primarily to a decrease in the discount rate. For OPEB, the net actuarial gain in 2023 was primarily due to assumption updates.
[4] | Includes $107 million ($76 million, after-tax) and $143 million ($102 million, after-tax) in AOCL related to Pension and OPEB as of December 31, 2024 and 2023, respectively. Also includes Regulatory Assets of $1,227 million, Deferred Assets of $134 million and Deferred Liabilities of $9 million as of December 31, 2024 and Regulatory Assets of $1,427 million and Deferred Assets of $141 million as of December 31, 2023. The Regulatory Asset amounts do not include $103 million and $55 million as of December 31, 2024 and 2023, respectively, as a result of modifying the method for calculating pension expense for ratemaking purposes, approved by the BPU effective January 1, 2023.
[5] | 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.
[6] | For pension benefits, the net actuarial gain in 2024 was due primarily to an increase in the discount rate. For OPEB, the net actuarial gain in 2024 was due primarily to an increase in the discount rate partially offset by other assumption updates. For pension benefits and OPEB, the net actuarial losses in 2023 were due primarily to a decrease in the discount rate and other assumption updates.
[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.

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(7) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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