XML 91 R74.htm IDEA: XBRL DOCUMENT
v3.20.4

TAXES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Loss Carry Forward Valuation Reserve |  |  |
Beginning of year balance | $ 441 | $ 394 | $ 312
Charged to income | 55 | 47 | 82
Charged to other accounts | 0 | 0 | 0
Write-offs | 0 | 0 | 0
End of year balance | $ 496 | $ 441 | $ 394

X
- Definition Deferred Tax Assets Liabilities Net Non current Loss carry forward valuation reserve. + References No definition available. + Details
Name: | fe_DeferredTaxAssetsLiabilitiesNetNonCurrentLossCarryForwardValuationReserve
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loss Carry Forward Valuation Reserve + References No definition available. + Details
Name: | fe_LossCarryForwardValuationReserveRollForward
Namespace Prefix: | fe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Loss Carryfroward, Valuation Allowance Reserve, Charged to Income + References No definition available. + Details
Name: | fe_OperatingLossCarryfrowardValuationAllowanceReserveChargedToIncome
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating Loss Carryfroward, Valuation Allowance Reserve, Charged to Other Accounts + References No definition available. + Details
Name: | fe_OperatingLossCarryfrowardValuationAllowanceReserveChargedToOtherAccounts
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating Loss Carryfroward, Valuation Allowance Reserve, Written-Off + References No definition available. + Details
Name: | fe_OperatingLossCarryfrowardValuationAllowanceReserveWrittenOff
Namespace Prefix: | fe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration