XML 78 R63.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Regulatory Matters - Ohio (Details) MWh in Thousands, $ in Millions |  |  |  |  |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 12, 2016 USD ($) condition MW | Aug. 04, 2016 | Jul. 25, 2016 USD ($) | Jun. 29, 2016 USD ($) | Apr. 15, 2016 USD ($) | Aug. 07, 2013 USD ($) auction | Mar. 20, 2013 | Sep. 30, 2016 MWh
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Proposed goal to reduce CO2 pollution (percent) |  |  |  |  |  |  |  | 90.00%
Ohio |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Energy efficient portfolio plan term |  |  |  |  |  |  | 3 years |
Credit to non-shopping customers |  |  |  |  |  | $ 43.4 |  |
Ohio | Year 2015 |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Annual energy savings (in GWH) | MWh |  |  |  |  |  |  |  | 2,266
Ohio | Year 2016 |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Annual energy savings (in GWH) | MWh |  |  |  |  |  |  |  | 2,288
Ohio | Year 2017 |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Annual increase in energy savings (percent) |  |  |  |  |  |  |  | 1.00%
Ohio | Annually Through 2020 |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Utilities required to additionally reduce peak demand |  |  |  |  |  |  |  | 0.75%
Ohio | PUCO |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Number of renewable energy auctions | auction |  |  |  |  |  | 1 |  |
Approved period to limit average customer bill |  |  |  |  |  |  |  | 2 years
Ohio | PUCO | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Term of proposed purchase power agreement | 8 years |  |  |  |  |  |  |
Recovery period | 5 years |  |  |  |  |  |  |
Costs avoided by customers | $ 360.0 |  |  |  |  |  |  |
Proposed goal to reduce CO2 pollution (percent) | 90.00% |  |  |  |  |  |  |
Ohio | PUCO | Wind or Solar Power | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Proposed potential plant acquisition (MW) | MW | 100 |  |  |  |  |  |  |
Ohio | Ohio Companies | PUCO |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Expenditures for cost recovery program |  |  |  |  | $ 323.0 |  |  |
Ohio | Retail Rate Stability Rider | FES |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Term of proposed purchase power agreement |  | 8 years |  |  |  |  |  |
Ohio | Delivery Capital Recovery Rider | PUCO | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Annual revenue cap for rider | $ 30.0 |  |  |  |  |  |  |
Annual revenue cap for rider for years three through six | 20.0 |  |  |  |  |  |  |
Annual revenue cap for rider for years six through eight | 15.0 |  |  |  |  |  |  |
Ohio | Distribution Modernization Rider |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Annual revenue cap for rider |  |  |  | $ 131.0 |  |  |  |
Recovery period |  |  |  | 3 years |  |  |  |
Amount of rider valuation |  |  | $ 558.0 |  |  |  |  |
Period of rider valuation |  |  | 8 years |  |  |  |  |
Ohio | Distribution Modernization Rider | PUCO |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Possible extension period |  |  |  | 2 years |  |  |  |
Ohio | Distribution Modernization Rider | PUCO | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Annual revenue cap for rider | $ 132.5 |  |  |  |  |  |  |
Recovery period | 3 years |  |  |  |  |  |  |
Possible extension period | 2 years |  |  |  |  |  |  |
Public Utilities, Annual Revenue Cap for Rider, Approved Amount | $ 204.0 |  |  |  |  |  |  |
Public Utilities, Excessive Earnings Test Cost Recovery, Exclusion Period | 3 years |  |  |  |  |  |  |
Public Utilities, Excessive Earnings Test Cost Recovery, Exclusion Period, Renewal Period | 2 years |  |  |  |  |  |  |
Public Utilities, Annual Revenue Cap for Rider, Number of Conditions | condition | 3 |  |  |  |  |  |  |
Ohio | Customary Advisory Council | PUCO | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Term of proposed purchase power agreement | 8 years |  |  |  |  |  |  |
Annual contribution amount | $ 1.0 |  |  |  |  |  |  |
Contribution amount | $ 8.0 |  |  |  |  |  |  |
Ohio | Energy Conservation, Economic Development and Job Retention | Ohio Companies | PUCO | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Term of proposed purchase power agreement | 8 years |  |  |  |  |  |  |
Annual contribution amount | $ 3.0 |  |  |  |  |  |  |
Contribution amount | $ 24.0 |  |  |  |  |  |  |
Ohio | Fuel-Fund | Ohio Companies | PUCO | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |
Term of proposed purchase power agreement | 8 years |  |  |  |  |  |  |
Annual contribution amount | $ 2.4 |  |  |  |  |  |  |
Contribution amount | $ 19.0 |  |  |  |  |  |  |

X
- Definition Annual Energy Savings + References No definition available. + Details
Name: | fe_AnnualEnergySavings
Namespace Prefix: | fe_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Annual Revenue Cap for Rider For Years One Through Three + References No definition available. + Details
Name: | fe_AnnualRevenueCapforRiderForYearsOneThroughThree
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Annual Revenue Cap for Rider For Years Six Through Eight + References No definition available. + Details
Name: | fe_AnnualRevenueCapforRiderForYearsSixThroughEight
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Annual Revenue Cap for Rider For Years Three Through Six + References No definition available. + Details
Name: | fe_AnnualRevenueCapforRiderForYearsThreeThroughSix
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Costs avoided by customers. + References No definition available. + Details
Name: | fe_CostsAvoidedByCustomers
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Credit to Non-Shopping Customers + References No definition available. + Details
Name: | fe_CredittoNonShoppingCustomers
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Energy Efficient Portfolio Plan, Term of Plan + References No definition available. + Details
Name: | fe_EnergyEfficientPortfolioPlanTermofPlan
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 Proposed Action, Reduction in Power Plants Carbon Pollution, Percentage + References No definition available. + Details
Name: | fe_ProposedActionReductioninPowerPlantsCarbonPollutionPercentage
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proposed Purchase Power Agreement, Term + References No definition available. + Details
Name: | fe_ProposedPurchasePowerAgreementTerm
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Annual Contribution Amount + References No definition available. + Details
Name: | fe_PublicUtilitiesAnnualContributionAmount
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Annual Revenue Cap for Rider + References No definition available. + Details
Name: | fe_PublicUtilitiesAnnualRevenueCapforRider
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Annual Revenue Cap for Rider, Approved Amount + References No definition available. + Details
Name: | fe_PublicUtilitiesAnnualRevenueCapforRiderApprovedAmount
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Annual Revenue Cap for Rider, Number of Conditions + References No definition available. + Details
Name: | fe_PublicUtilitiesAnnualRevenueCapforRiderNumberofConditions
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Approved Limit to Average Customer Bill, Period + References No definition available. + Details
Name: | fe_PublicUtilitiesApprovedLimittoAverageCustomerBillPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Contribution Amount + References No definition available. + Details
Name: | fe_PublicUtilitiesContributionAmount
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Public Utilities, Cost Recovery Period, Possible Extension Period + References No definition available. + Details
Name: | fe_PublicUtilitiesCostRecoveryPeriodPossibleExtensionPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Excessive Earnings Test Cost Recovery, Exclusion Period + References No definition available. + Details
Name: | fe_PublicUtilitiesExcessiveEarningsTestCostRecoveryExclusionPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Excessive Earnings Test Cost Recovery, Exclusion Period, Renewal Period + References No definition available. + Details
Name: | fe_PublicUtilitiesExcessiveEarningsTestCostRecoveryExclusionPeriodRenewalPeriod
Namespace Prefix: | fe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Property, Plant and Equipment, Proposed Potential Plant Acquisition + References No definition available. + Details
Name: | fe_PublicUtilitiesPropertyPlantandEquipmentProposedPotentialPlantAcquisition
Namespace Prefix: | fe_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Renewable Energy Auctions + References No definition available. + Details
Name: | fe_PublicUtilitiesRenewableEnergyAuctions
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Rider Valuation, Amount + References No definition available. + Details
Name: | fe_PublicUtilitiesRiderValuationAmount
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Rider Valuation, Period + References No definition available. + Details
Name: | fe_PublicUtilitiesRiderValuationPeriod
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 -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | fe_UtilitiesRequiredToAdditionallyReducePeakDemand
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | fe_TargetPeriodAxis=fe_Year2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_TargetPeriodAxis=fe_Year2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_TargetPeriodAxis=fe_Year2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_TargetPeriodAxis=fe_AnnuallyThrough2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

X
- Details
Name: | fe_RegulatoryMattersSecondaryAxis=fe_CustomaryAdvisoryCouncilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_RegulatoryMattersSecondaryAxis=fe_EnergyConservationEconomicDevelopmentandJobRetentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fe_RegulatoryMattersSecondaryAxis=fe_FuelFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |