1.0.0.3 false Statement of Other Comprehensive Income (Unaudited, USD $) In Millions false 1 $ false true false Unaudited false Unaudited scenarioName asi http://www.firstenergycorp.com/20090507 u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance pure xbrli 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false true false Unaudited false Unaudited scenarioName asi http://www.firstenergycorp.com/20090507 u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance pure xbrli 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 4 NET INCOME 2 us-gaap_NetIncomeLoss us-gaap true credit duration monetary The profit or loss of the entity net of income taxes for the reporting period, calculated and presented in the income... false false false false false false false false false 1 true true 115000000 115 false true 2 true true 277000000 277 false true The profit or loss of the entity net of income taxes for the reporting period, calculated and presented in the income statement in accordance with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph (b) -Subparagraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 false 5 Other Comprehensive Income (Loss), Net of Tax, Period Increase (Decrease) [Abstract] 2 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false true 2 false false 0 0 false true No definition available. false 6 Pension and other postretirement benefits 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPeriodIncreaseDecrease us-gaap true na duration monetary Amounts recognized in other comprehensive income (but not yet recognized in net periodic benefit cost), including the net... false false false false false false false false false 1 false true 35000000 35 false true 2 false true -20000000 -20 false true Amounts recognized in other comprehensive income (but not yet recognized in net periodic benefit cost), including the net gain (loss) and net prior service cost (credit) arising during the period. Also includes reclassification adjustments out of other comprehensive income as a result of being recognized as components of net periodic benefit cost for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 22, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph a Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph C3 false 7 Unrealized gain (loss) on derivative hedges 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPeriodIncreaseDecrease us-gaap true na duration monetary Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion... false false false false false false false false false 1 false true 15000000 15 false true 2 false true -13000000 -13 false true Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 31, 46 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph (b)(1) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 24, 26 false 8 Change in unrealized gain on available-for-sale securities 3 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax us-gaap true credit duration monetary Gross appreciation or the gross loss in value of the total of unsold available-for-sale securities during the period being... false false false false false false false false false 1 false true -5000000 -5 false true 2 false true -58000000 -58 false true Gross appreciation or the gross loss in value of the total of unsold available-for-sale securities during the period being reported (except when designated as a fair value hedge). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17 false 9 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease us-gaap true na duration monetary This element represents Other Comprehensive Income (Loss), Before Tax, for the period. The pretax revenues, expenses, gains,... false false false false false false false false false 1 false true 45000000 45 false true 2 false true -91000000 -91 false true This element represents Other Comprehensive Income (Loss), Before Tax, for the period. The pretax revenues, expenses, gains, and losses that under generally accepted accounting principles are included in comprehensive income, but excluded from net income. Includes the entity's proportionate share of an investee's equity adjustments for other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph e Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 22, 24, 121 false 10 Income tax expense (benefit) related to other comprehensive income 3 us-gaap_OtherComprehensiveIncomeLossTax us-gaap true debit duration monetary Tax effect of the change in accumulated other comprehensive income, that is, the tax effect on items included in other... false false false false false false false false false 1 false true 15000000 15 false true 2 false true -33000000 -33 false true Tax effect of the change in accumulated other comprehensive income, that is, the tax effect on items included in other comprehensive income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 36 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 11 Other comprehensive income (loss), net of tax 2 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary This element represents Other Comprehensive Income (Loss), Net of Tax, for the period. Includes deferred gains (losses) on... false false false false false false false false false 1 false true 30000000 30 false true 2 false true -58000000 -58 false true This element represents Other Comprehensive Income (Loss), Net of Tax, for the period. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 22, 23, 24, 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 12 COMPREHENSIVE INCOME 2 us-gaap_ComprehensiveIncomeNetOfTax us-gaap true credit duration monetary The change in equity [net assets] of a business enterprise during a period from transactions and other events and... false false false false false false false false false 1 false true 145000000 145 false true 2 false true 219000000 219 false true The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from nonowner sources. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 8, 9, 10, 11, 12, 13, 14 false 13 COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST 2 fe_NetIncomeLossAttributableToNoncontrollingInterest fe false na duration monetary The portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion... false false false false false false false false false 1 false true -4000000 -4 false true 2 false true 1000000 1 false true The portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 58 -Publisher AICPA -Subparagraph a -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1,A4,A5 -Publisher AICPA Reference 3: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Publisher AICPA -Subparagraph c(1) false 14 COMPREHENSIVE INCOME ATTRIBUTABLE TO PARENT 2 fe_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent fe false na duration monetary This element represents Other Comprehensive Income (Loss), Net of Tax, for the period attributable to the parent entity. ... false false false false false false false false false 1 true true 149000000 149 false true 2 true true 218000000 218 false true This element represents Other Comprehensive Income (Loss), Net of Tax, for the period attributable to the parent entity. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Reference 1: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Publisher AICPA -Subparagraph c(3) Reference 2: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29.30 -Publisher AICPA false false 2 11 true Millions UnKnown UnKnown false true