XML 144 R125.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Regulatory Matters - Pennsylvania and West Virginia (Details) $ in Millions |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 11, 2017 proposal MW | Sep. 01, 2017 USD ($) | Jun. 14, 2017 USD ($) | Jan. 19, 2017 USD ($) | Dec. 09, 2016 USD ($) | Jun. 19, 2015 | Mar. 31, 2016 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2017 USD ($) proposal | Dec. 31, 2027 MW | Dec. 31, 2020 MW | Mar. 06, 2017 USD ($) MW | Sep. 23, 2016 program
Pennsylvania |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of RFP's | proposal |  |  |  |  |  |  |  |  | 1 |  |  |  |
Project term |  |  |  |  |  |  |  |  | 2 years |  |  |  |
Pennsylvania | 12 Month Period |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy contract term |  |  |  |  |  |  |  |  | 12 months |  |  |  |
Pennsylvania | 24 Month Period |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy contract term |  |  |  |  |  |  |  |  | 24 months |  |  |  |
Pennsylvania | ME |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of rate increase |  |  |  | $ 96.0 |  |  |  |  |  |  |  |  |
Pennsylvania | Penn |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of rate increase |  |  |  | 29.0 |  |  |  |  |  |  |  |  |
Pennsylvania | WP |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of rate increase |  |  |  | 66.0 |  |  |  |  |  |  |  |  |
Pennsylvania | PN |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of rate increase |  |  |  | $ 100.0 |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | ME |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  |  | 1.80% |  |  |  |  |  |  |
Energy consumption reduction targets (percent) |  |  |  |  |  | 4.00% |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  | $ 51.3 |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | Penn |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  |  | 1.70% |  |  |  |  |  |  |
Energy consumption reduction targets (percent) |  |  |  |  |  | 3.30% |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  | 33.2 |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | WP |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  |  | 1.80% |  |  |  |  |  |  |
Energy consumption reduction targets (percent) |  |  |  |  |  | 2.60% |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  | 50.1 |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | Pennsylvania Companies | DSP |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of RFP's | proposal | 2 |  |  |  |  |  |  |  |  |  |  |  |
Project term | 2 years |  |  |  |  |  |  |  |  |  |  |  |
New hourly priced default service threshold (in MW's) | MW | 0.1 |  |  |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | Pennsylvania Companies | DSP | 3 Month Period |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy contract term | 3 months |  |  |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | Pennsylvania Companies | DSP | 12 Month Period |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy contract term | 12 months |  |  |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | Pennsylvania Companies | DSP | 24 Month Period |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy contract term | 24 months |  |  |  |  |  |  |  |  |  |  |  |
Pennsylvania | PPUC | Pennsylvania Companies | EE&C |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved amount of rate increase |  |  |  |  |  |  | $ 390.0 |  |  |  |  |  |
Pennsylvania | PPUC | PN |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Demand reduction targets proposed |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Energy consumption reduction targets (percent) |  |  |  |  |  | 3.90% |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  | $ 44.8 |  |  |  |  |  |  |  |  |  |
West Virginia | WVPSC | VMS Rates |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  | $ (15.0) |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) (percent) |  | (1.00%) |  |  |  |  |  |  |  |  |  |  |
West Virginia | WVPSC | VMS Rates | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Requested additional rate decrease |  |  |  |  |  |  |  | $ (15.0) |  |  |  |  |
West Virginia | WVPSC | MP and PE |  |  |  |  |  |  |  |  |  |  |  |  |
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 | WVPSC | MP and PE | ENEC |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  |  |  | $ 25.0 |  |  |  |  |  |  |  |
Rate stability period |  |  |  |  | 2 years |  |  |  |  |  |  |  |
West Virginia | WVPSC | MP | Accelerated Recovery Costs For Modernizing and Improving Coal-Fired Boilers | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity shortfall (in MW's) | MW |  |  |  |  |  |  |  |  |  |  | 700 |  |
West Virginia | WVPSC | MP | IRP | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity shortfall (in MW's) | MW |  |  |  |  |  |  |  |  |  | 850 |  |  |
Pleasants Power Station |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Plant generation capacity (in MW's) | MW |  |  |  |  |  |  |  |  |  |  |  | 1,300 |
Assets purchase agreement consideration to be received |  |  |  |  |  |  |  |  |  |  |  | $ 195.0 |

X
- Definition Asset Purchase Agreement, Consideration + References No definition available. + Details
Name: | fe_AssetPurchaseAgreementConsideration
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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, New Hourly Price Threshold + References No definition available. + Details
Name: | fe_PublicUtilitiesNewHourlyPriceThreshold
Namespace Prefix: | fe_
Data Type: | num:powerItemType
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 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: | 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_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_DefaultServicePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_TargetPeriodAxis=fe_ThreeMonthPeriodMember
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: | 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: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
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: | dei_LegalEntityAxis=fe_MonongahelaPowerCompanyMember
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: |