XML 67 R54.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Regulatory Matters - Maryland and New Jersey (Details) $ in Millions |  |  |  |  |  |  | 6 Months Ended | 36 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 13, 2018 USD ($) | Mar. 26, 2018 USD ($) | Jan. 19, 2018 USD ($) rebate | Dec. 12, 2016 USD ($) | Jul. 16, 2015 | Feb. 27, 2013 USD ($) | Jun. 30, 2018 component | Dec. 31, 2020 USD ($) | Feb. 15, 2018 USD ($)
Maryland |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Expected infrastructure investments |  |  |  |  |  | $ 2,700.0 |  |  |
Period of expected infrastructure investments |  |  |  |  |  | 15 years |  |  |
New Jersey |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Number of supply components | component |  |  |  |  |  |  | 2,000,000 |  |
PE | Maryland |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Recovery period for expenditures for cost recovery program |  |  |  |  |  |  | 3 years |  |
Incremental energy savings goal in the next 12 months (percent) |  |  |  |  | 0.97% |  |  |  |
Incremental energy savings goal per year (percent) |  |  |  |  | 0.20% |  |  |  |
Incremental energy savings goal thereafter (percent) |  |  |  |  | 2.00% |  |  |  |
Amortization period |  |  |  |  |  |  | 5 years |  |
PE | MPSC |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Number of residential charging equipment rebates | rebate |  |  | 2,000 |  |  |  |  |  |
Number of commercial charging equipment rebates | rebate |  |  | 259 |  |  |  |  |  |
Cost of charging equipment rebates |  |  | $ 12.0 |  |  |  |  |  |
Charging equipment rebates amortization period |  |  | 5 years |  |  |  |  |  |
JCP&L | NJBPU | New Jersey |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Approved amount of annual increase (decrease) |  | $ (28.6) |  | $ 80.0 |  |  |  |  |
Approved rider due to change in tax rate |  | $ 1.3 |  |  |  |  |  |  |
Scenario, Forecast | PE | Maryland |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Recovery period for expenditures for cost recovery program |  |  |  |  |  |  |  | 3 years |
Expenditures for cost recovery program |  |  |  |  |  |  |  | $ 116.0 |
Minimum | PE | MPSC | Maryland |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Impact on base rate |  |  |  |  |  |  |  |  | $ 7.0
Maximum | PE | MPSC | Maryland |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Impact on base rate |  |  |  |  |  |  |  |  | $ 8.0
Subsequent Event | JCP&L | NJBPU | JCP&L Reliability Plus |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Amount of requested rate increase (decrease) | $ 386.8 |  |  |  |  |  |  |  |
Subsequent Event | JCP&L | NJBPU | JCP&L Reliability Plus | New Jersey |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Infrastructure investment period | 4 years |  |  |  |  |  |  |  |

X
- Definition Expected Infrastructure Investments + References No definition available. + Details
Name: | fe_ExpectedInfrastructureInvestments
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Expected Infrastructure Investments, Period + References No definition available. + Details
Name: | fe_ExpectedInfrastructureInvestmentsPeriod
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 Incremental Energy Savings Goal, Next Twelve Months, Percent + References No definition available. + Details
Name: | fe_IncrementalEnergySavingsGoalNextTwelveMonthsPercent
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Incremental Energy Savings Goal, Percent + References No definition available. + Details
Name: | fe_IncrementalEnergySavingsGoalPercent
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Incremental Energy Savings Goal, Thereafter, Percent + References No definition available. + Details
Name: | fe_IncrementalEnergySavingsGoalThereafterPercent
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Supply Components + References No definition available. + Details
Name: | fe_NumberofSupplyComponents
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Approved Rate Increase (Decrease) Due to Change in Tax Rate, Amount + References No definition available. + Details
Name: | fe_PublicUtilitiesApprovedRateIncreaseDecreaseDuetoChangeinTaxRateAmount
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Infrastructure Investment Period + References No definition available. + Details
Name: | fe_PublicUtilitiesInfrastructureInvestmentPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Electric Vehicle Program, Charging Equipment Rebates Amortization Period + References No definition available. + Details
Name: | fe_PublicUtilitiesRequestedElectricVehicleProgramChargingEquipmentRebatesAmortizationPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Electric Vehicle Program, Cost of Charging Equipment Rebates + References No definition available. + Details
Name: | fe_PublicUtilitiesRequestedElectricVehicleProgramCostofChargingEquipmentRebates
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Public Utilities, Requested Electric Vehicle Program, Number of Commercial Charging Equipment Rebates + References No definition available. + Details
Name: | fe_PublicUtilitiesRequestedElectricVehicleProgramNumberofCommercialChargingEquipmentRebates
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Requested Electric Vehicle Program, Number of Residential Charging Equipment Rebates + References No definition available. + Details
Name: | fe_PublicUtilitiesRequestedElectricVehicleProgramNumberofResidentialChargingEquipmentRebates
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Tax Cuts and Jobs Act of 2017, Impact on Base Rate + References No definition available. + Details
Name: | fe_PublicUtilitiesTaxCutsandJobsActof2017ImpactonBaseRate
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recovery period for expenditures for cost recovery program. + References No definition available. + Details
Name: | fe_RecoveryPeriodForExpendituresForCostRecoveryProgram
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Recovery Program, Amortization Period + References No definition available. + Details
Name: | fe_RecoveryProgramAmortizationPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

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

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

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

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

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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