XML 71 R60.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Regulatory Matters - Pennsylvania and West Virginia (Details) $ in Millions |  |  |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 01, 2017 USD ($) | Jun. 14, 2017 USD ($) | Jan. 27, 2017 USD ($) | Dec. 09, 2016 USD ($) | Jun. 19, 2015 | Mar. 31, 2016 USD ($) | Sep. 30, 2017 USD ($) proposal | Dec. 31, 2019 USD ($) | Dec. 31, 2027 MW | Dec. 31, 2020 MW | Mar. 06, 2017 USD ($) MW | Sep. 23, 2016 program
Pennsylvania |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of RFP's | proposal |  |  |  |  |  |  | 1 |  |  |  |  |
RFP term |  |  |  |  |  |  | 2 years |  |  |  |  |
Pennsylvania | Twelve month period |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term of energy contract |  |  |  |  |  |  | 12 months |  |  |  |  |
Pennsylvania | Twenty-four month period |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term of energy contract |  |  |  |  |  |  | 24 months |  |  |  |  |
Pennsylvania | PPUC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
LTIIP recovery period |  | 5 years |  |  |  |  |  |  |  |  |  |
Pennsylvania | Pennsylvania Companies | PPUC | EE&C Phase III |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of annual increase |  |  |  |  |  | $ 390.0 |  |  |  |  |  |
Pennsylvania | ME |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of annual increase |  |  | $ 96.0 |  |  |  |  |  |  |  |  |
Pennsylvania | ME | PPUC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  | 1.80% |  |  |  |  |  |  |
Energy consumption reduction targets proposed |  |  |  |  | 4.00% |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  | $ 51.6 |  |  |  |  |  |  |  |  |  |
Pennsylvania | Penn |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of annual increase |  |  | 29.0 |  |  |  |  |  |  |  |  |
Pennsylvania | Penn | PPUC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  | 1.70% |  |  |  |  |  |  |
Energy consumption reduction targets proposed |  |  |  |  | 3.30% |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  | 58.9 |  |  |  |  |  |  |  |  |  |
Pennsylvania | WP |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of annual increase |  |  | 66.0 |  |  |  |  |  |  |  |  |
Pennsylvania | WP | PPUC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  | 1.80% |  |  |  |  |  |  |
Energy consumption reduction targets proposed |  |  |  |  | 2.60% |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  | 88.3 |  |  |  |  |  |  |  |  |  |
Pennsylvania | PN |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of annual increase |  |  | $ 100.0 |  |  |  |  |  |  |  |  |
Pennsylvania | PN | PPUC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  | 0.00% |  |  |  |  |  |  |
Energy consumption reduction targets proposed |  |  |  |  | 3.90% |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  | $ 60.0 |  |  |  |  |  |  |  |  |  |
West Virginia | WVPSC | VMP Surcharge Rates |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount of requested rate increase (decrease) | $ (15.0) |  |  |  |  |  |  |  |  |  |  |
Requested rate decrease | 1.00% |  |  |  |  |  |  |  |  |  |  |
West Virginia | MP and PE | WVPSC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of proposed efficient programs | program |  |  |  |  |  |  |  |  |  |  |  | 3
Energy efficient reduction requirement (percent) |  |  |  |  |  |  |  |  |  |  |  | 0.50%
Expenditures for cost recovery program |  |  |  |  |  |  | $ 10.4 |  |  |  |  |
West Virginia | MP and PE | WVPSC | ENEC |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of annual increase |  |  |  | $ 25.0 |  |  |  |  |  |  |  |
Rate stabilization period |  |  |  | 2 years |  |  |  |  |  |  |  |
Scenario, Forecast | West Virginia | WVPSC | VMP Surcharge Rates |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount of additional requested rate increase (decrease) |  |  |  |  |  |  |  | $ (15.0) |  |  |  |
Scenario, Forecast | West Virginia | MP | WVPSC | Accelerated Recovery Costs For Modernizing and Improving Coal-Fired Boilers |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capacity shortfall (in MW's) | MW |  |  |  |  |  |  |  |  |  | 700 |  |
Scenario, Forecast | West Virginia | MP | WVPSC | IRP |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capacity shortfall (in MW's) | MW |  |  |  |  |  |  |  |  | 850 |  |  |
Pleasants Power Station |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Plant capacity (in MW's) | MW |  |  |  |  |  |  |  |  |  |  | 1,300 |
Held-for-sale | Pleasants Power Station |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale |  |  |  |  |  |  |  |  |  |  | $ 195.0 |

X
- Definition Demand Reduction Targets, Proposed Demand Reduction + References No definition available. + Details
Name: | fe_DemandReductionTargetsProposedDemandReduction
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Consumption Reduction Targets, Proposed Consumption Reduction + References No definition available. + Details
Name: | fe_EnergyConsumptionReductionTargetsProposedConsumptionReduction
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Contract, Term + References No definition available. + Details
Name: | fe_EnergyContractTerm
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expenditures for cost recovery program. + References No definition available. + Details
Name: | fe_ExpendituresForCostRecoveryProgram
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of Requests For Proposal + References No definition available. + Details
Name: | fe_NumberofRequestsForProposal
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Plant Capacity + References No definition available. + Details
Name: | fe_PlantCapacity
Namespace Prefix: | fe_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Energy Efficient Reduction Requirement, Percent + References No definition available. + Details
Name: | fe_PublicUtilitiesEnergyEfficientReductionRequirementPercent
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Long-term Improvement Plan, Recovery Period + References No definition available. + Details
Name: | fe_PublicUtilitiesLongtermImprovementPlanRecoveryPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Number of Proposed Efficient Programs + References No definition available. + Details
Name: | fe_PublicUtilitiesNumberofProposedEfficientPrograms
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Rate Case, Rate Stabilization, Period + References No definition available. + Details
Name: | fe_PublicUtilitiesRateCaseRateStabilizationPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Additional Rate Increase (Decrease), Amount + References No definition available. + Details
Name: | fe_PublicUtilitiesRequestedAdditionalRateIncreaseDecreaseAmount
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utility, Capacity Shortfall + References No definition available. + Details
Name: | fe_PublicUtilityCapacityShortfall
Namespace Prefix: | fe_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regulatory matters. + References No definition available. + Details
Name: | fe_RegulatoryMattersLineItems
Namespace Prefix: | fe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Request for Proposal, Project Term + References No definition available. + Details
Name: | fe_RequestforProposalProjectTerm
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1107-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of public utility's approved rate increase (decrease) by regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_PA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_TargetPeriodAxis=fe_TwelveMonthPeriodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_TargetPeriodAxis=fe_TwentyFourMonthPeriodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=fe_EnergyEfficiencyandConservationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_WV
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=fe_VegetationManagementSurchargeRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=fe_ExpandedNetEnergyCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=fe_AcceleratedRecoveryCostsForModernizingandImprovingCoalFiredBoilersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=fe_IntegratedResourcePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=fe_PleasantsPowerStationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |