XML 72 R60.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Derivative Instruments (Details Textuals) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 USD ($) agreement | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) agreement | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) agreement
Derivative [Line Items] |  |  |  |  |
Unamortized gains or losses associated with designated cash flow hedges | $ 12 |  | $ 12 |  | $ 11
Gains included in long-term debt associated with prior fixed-for-floating interest rate swap agreements |  |  |  |  | 20
Collateral received | $ 3 |  | $ 3 |  | $ 0
Possible adverse change in quoted market prices of derivative instruments | 10.00% |  | 10.00% |  |
Possible decrease net income due to ten percent adverse change in commodity prices |  |  | $ (33) |  |
Cash Flow Hedges |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Less than 1 million dollar loss on cash flow hedge expected to be reclassified to earnings in next twelve months |  |  | $ 1 |  |
Number of forward starting swap agreements accounted for as a cash flow hedge outstanding | agreement | 0 |  | 0 |  | 0
Unamortized gains or losses associated with prior interest rate hedges | $ 37 |  | $ 37 |  | $ 42
Gains (losses) to be amortized to interest expenses during next twelve months |  |  | (8) |  |
Number of outstanding commodity or interest rate derivatives | agreement |  |  |  |  | 0
Fair Value Hedging |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gains (losses) to be amortized to interest expenses during next twelve months |  |  | $ 9 |  |
Number of outstanding commodity or interest rate derivatives | agreement | 0 |  | 0 |  | 0
Number of fixed-for-floating interest rate swap agreements outstanding | agreement | 0 |  | 0 |  | 0
Gains included in long-term debt associated with prior fixed-for-floating interest rate swap agreements | $ 15 |  | $ 15 |  |
Reclassifications from long-term debt | 3 | $ 3 | 6 | $ 6 |
Commodity contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Net asset position under commodity derivative contracts | 86 |  | 86 |  |
Collateral received | 3 |  | 3 |  | $ 0
Commodity contracts | FES |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Net asset position under commodity derivative contracts | 86 |  | 86 |  |
Collateral posted | 6 |  | 6 |  |
Collateral received | 3 |  | 3 |  |
Additional collateral related to commodity derivatives | 4 |  | 4 |  |
NUGs |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Collateral received | 0 |  | 0 |  | 0
Liability position | 123 |  | 123 |  |
FTRs |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Net asset position under commodity derivative contracts | 9 |  | 9 |  |
Collateral received | 0 |  | 0 |  | $ 0
FTRs | FES |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Net asset position under commodity derivative contracts | 7 |  | 7 |  |
Collateral posted | $ 10 |  | $ 10 |  |

X
- Definition Gains (Losses) To Be Amortized To Interest Expenses During Next Twelve Months. + References No definition available. + Details
Name: | fe_GainsLossesToBeAmortizedToInterestExpensesDuringNextTwelveMonths
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number Of Outstanding Commodity or Interest Rate Derivatives + References No definition available. + Details
Name: | fe_NumberOfOutstandingCommodityorInterestRateDerivatives
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Outstanding Fixed-for-Floating Interest Rate Swap Agreements + References No definition available. + Details
Name: | fe_NumberOfOutstandingFixedForFloatingInterestRateSwapAgreements
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Outstanding Forward Starting Swap Agreements, Cash Flow Hedge + References No definition available. + Details
Name: | fe_NumberOfOutstandingForwardStartingSwapAgreementsCashFlowHedge
Namespace Prefix: | fe_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Possible Adverse Percentage Change Threshold In Quoted Market Prices Derivative Instruments + References No definition available. + Details
Name: | fe_PossibleAdversePercentageChangeThresholdInQuotedMarketPricesDerivativeInstruments
Namespace Prefix: | fe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Possible Increase Net Income Due To Ten Percent Adverse Change In Commodity Prices + References No definition available. + Details
Name: | fe_PossibleIncreaseNetIncomeDueToTenPercentAdverseChangeInCommodityPrices
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reclassifications from long-term debt. + References No definition available. + Details
Name: | fe_ReclassificationsFromLongTermDebt
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unamortized gains included in long-term debt associated with prior fixed-for-floating interest rate swap agreements. + References No definition available. + Details
Name: | fe_UnamortizedGainsIncludedInLongTermDebtAssociatedWithPriorFixedForFloatingInterestRateSwapAgreements
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Unamortized gains or losses associated with designated cash flow hedges. + References No definition available. + Details
Name: | fe_UnamortizedGainsOrLossesAssociatedWithDesignatedCashFlowHedges
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unamortized losses associated with prior interest rate hedges. + References No definition available. + Details
Name: | fe_UnamortizedLossesAssociatedWithPriorInterestRateHedges
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624258-113959 + Details
Name: | us-gaap_AdditionalCollateralAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
Name: | us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624258-113959 + Details
Name: | us-gaap_CollateralAlreadyPostedAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226016-175313 + Details
Name: | us-gaap_DerivativeCollateralObligationToReturnCash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226006-175313 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226006-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fe_CashFlowHedgesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_FairValueHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
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_DerivativeInstrumentRiskAxis=fe_NugsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fe_FtrsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |