XML 81 R64.htm IDEA: XBRL DOCUMENT
v3.25.1

COMMITMENTS, GUARANTEES AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 04, 2025 | Feb. 03, 2025 | Jul. 21, 2021 | Dec. 31, 2024 | Mar. 31, 2025
Guarantor Obligations [Line Items] |  |  |  |  |
Guarantor obligations, current carrying value |  |  |  |  | $ 1,100
Company posted collateral related to net liability positions |  |  |  |  | 177
Collateral received |  |  |  |  | 66
Liabilities incurred |  |  |  | $ 95 |
JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Guarantor obligations, current carrying value |  |  |  |  | 48
Company posted collateral related to net liability positions |  |  |  |  | 28
Collateral received |  |  |  |  | 21
Liabilities incurred |  |  |  | 0 |
United States v. Householder, et al. | U.S. Attorney's Office |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Term of DPA |  |  | 3 years |  |
Loss in period |  |  | $ 230 |  |
Term of payments |  |  | 60 days |  |
United States v. Householder, et al. | United States Treasury |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Amount of refunds announced |  |  | $ 115 |  |
United States v. Householder, et al. | Ohio Development Service |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Amount of refunds announced |  |  | $ 115 |  |
Regulation of Waste Disposal |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Changes in timing and amount of estimated cash flows |  |  |  | 139 |
Accrual for environmental loss contingencies |  |  |  |  | 98
Environmental liabilities former gas facilities |  |  |  |  | $ 69
Regulation of Waste Disposal | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Changes in timing and amount of estimated cash flows |  |  |  | 0 |
Regulation of Waste Disposal | Corporate Non Segment |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Liabilities incurred | $ 130 |  |  | 87 |
Environmental Liability |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Asset retirement obligation, escrow deposit | $ 130 | $ 160 |  | $ 160 |
Agreed funding period | 5 years | 5 years |  | 5 years |
Asset retirement obligation, discount rate | 4.80% |  |  |  |
Environmental Liability | AE Supply |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |
Asset retirement obligation, escrow deposit | $ 15 |  |  |  |

X
- Definition Asset Retirement Obligation, Agreed Funding Period + References No definition available. + Details
Name: | fe_AssetRetirementObligationAgreedFundingPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Asset Retirement Obligation, Discount Rate + References No definition available. + Details
Name: | fe_AssetRetirementObligationDiscountRate
Namespace Prefix: | fe_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Asset Retirement Obligation, Escrow Deposit + References No definition available. + Details
Name: | fe_AssetRetirementObligationEscrowDeposit
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash Collateral Received For Supply Contracts, Net + References No definition available. + Details
Name: | fe_CashCollateralReceivedForSupplyContractsNet
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Company Posted Collateral Related To Net Liability Positions. + References No definition available. + Details
Name: | fe_CompanyPostedCollateralRelatedToNetLiabilityPositions
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Environmental Liabilities Former Gas Facilities. + References No definition available. + Details
Name: | fe_EnvironmentalLiabilitiesFormerGasFacilities
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loss Contingency, Settlement Agreement, Term + References No definition available. + Details
Name: | fe_LossContingencySettlementAgreementTerm
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Settlement Agreement, Term of Payments + References No definition available. + Details
Name: | fe_LossContingencySettlementAgreementTermOfPayments
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 16 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481899/410-30-55-16 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-7 + Details
Name: | us-gaap_AccrualForEnvironmentalLossContingencies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of asset retirement obligations incurred during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
Name: | us-gaap_AssetRetirementObligationLiabilitiesIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in asset retirement obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
Name: | us-gaap_AssetRetirementObligationPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
Name: | us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
Name: | us-gaap_GuaranteeObligationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
Name: | us-gaap_LossContingencyLossInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=fe_JERSEYCENTRALPOWERLIGHTCOMPANYMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=fe_UnitedStatesVHouseholderEtAlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=fe_USAttorneysOfficeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=fe_UnitedStatesTreasuryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=fe_OhioDevelopmentServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_LossContingenciesByClaimsAxis=fe_RegulationOfWasteDisposalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_LossContingenciesByClaimsAxis=fe_EnvironmentalLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=fe_AeSupplyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |