XML 144 R126.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Regulatory Matters - Ohio (Details) $ in Millions |  |  |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 14, 2016 USD ($) | Oct. 12, 2016 USD ($) | Apr. 15, 2016 | Aug. 07, 2013 USD ($) auction | Sep. 30, 2016 | Dec. 31, 2016 USD ($) MWh
Regulatory Matters [Line Items] |  |  |  |  |  |
Proposed reduction in power plants carbon pollution (percent) |  |  |  |  | 90.00% |
Ohio |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Annual energy savings | MWh |  |  |  |  |  | 1,990
EEPP term of plan |  |  | 3 years |  |  |
Portfolio plan estimated cost |  |  |  |  |  | $ 268.0
Credit to non-shopping customers |  |  |  | $ 43.4 |  |
Ohio | Year 2015 |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Annual energy savings | MWh |  |  |  |  |  | 486
Ohio | Year 2017 |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Annual energy savings yearly increase (percent) |  |  |  |  |  | 1.00%
Ohio | Annually Through 2020 |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Utilities required to additionally reduce peak demand |  |  |  |  |  | 0.75%
Ohio | Distribution Modernization Rider |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Rider valuation | $ 558.0 |  |  |  |  |
Rider valuation period | 8 years |  |  |  |  |
Ohio | PUCO |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Proposed reduction in power plants carbon pollution (percent) |  | 90.00% |  |  |  |
Number of renewable energy auctions | auction |  |  |  | 1 |  |
Ohio | PUCO | Distribution Modernization Rider |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Annual revenue cap for rider |  | $ 132.5 |  |  |  |
Cost recovery period |  | 3 years |  |  |  |
Possible extension period |  | 2 years |  |  |  |
Approved annual revenue cap amount for rider |  | $ 204.0 |  |  |  |
Excessive earnings test cost recovery exclusion period |  | 3 years |  |  |  |
Potential extension period for excessive earnings test cost recovery |  | 2 years |  |  |  |
Ohio | PUCO | DCR Rider |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Increased annual revenue cap for rider |  | $ 30.0 |  |  |  |
Revenue cap for Rider for years 3-6 |  | 20.0 |  |  |  |
Revenue cap for Rider for years 6-8 |  | 15.0 |  |  |  |
Ohio | PUCO | Energy Conservation, Economic Development and Job Retention |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |
Contribution amount |  | $ 51.0 |  |  |  |

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 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 Portfolio Plan, Estimated Cost + References No definition available. + Details
Name: | fe_PortfolioPlanEstimatedCost
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 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, 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, 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_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_PublicUtilitiesRegulatoryProceedingAxis=fe_DistributionModernizationRiderMember
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_PublicUtilitiesRegulatoryProceedingAxis=fe_DeliveryCapitalRecoveryRiderMember
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: |