1.0.0.3 false Statement of Income (Excluding Gross Margin Alternative) (Unaudited, USD $) In Millions, except Share data, unless otherwise specified 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 9 Revenues [Abstract] 7 us-gaap_RevenuesAbstract 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 10 Electric utilities 8 us-gaap_ElectricDomesticRegulatedRevenue us-gaap true credit duration monetary Revenue derived from the regulated (by a federal, state, or local government or agency) generation, transmission and... false false false false false false false false false 1 true true 3020000000 3020 false true 2 true true 2913000000 2913 false true Revenue derived from the regulated (by a federal, state, or local government or agency) generation, transmission and distribution of electricity. No authoritative reference available. false 11 Unregulated businesses 8 us-gaap_ElectricWorldwideUnregulatedRevenue us-gaap true credit duration monetary Revenue derived from the unregulated generation, transmission and distribution of electricity. false false false false false false false false false 1 false true 314000000 314 false true 2 false true 364000000 364 false true Revenue derived from the unregulated generation, transmission and distribution of electricity. No authoritative reference available. false 12 Total revenues 8 us-gaap_Revenues us-gaap true credit duration monetary Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other... false false false false false false false false false 1 false true 3334000000 3334 [1] false true 2 false true 3277000000 3277 [2] false true Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph (b) -Subparagraph 1 -Article 5 true 13 Costs and Expenses [Abstract] 7 us-gaap_CostsAndExpensesAbstract 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 14 Fuel 8 us-gaap_FuelCosts us-gaap true debit duration monetary Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period. false false false false false false false false false 1 false true 312000000 312 false true 2 false true 328000000 328 false true Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period. No authoritative reference available. false 15 Purchased power 8 us-gaap_CostOfPurchasedPower us-gaap true debit duration monetary Cost of electricity purchased and sold during the reporting period. false false false false false false false false false 1 false true 1143000000 1143 false true 2 false true 1000000000 1000 false true Cost of electricity purchased and sold during the reporting period. No authoritative reference available. false 16 Other operating expenses 8 us-gaap_OperatingExpenses us-gaap true debit duration monetary Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly... false false false false false false false false false 1 false true 827000000 827 false true 2 false true 799000000 799 false true Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No authoritative reference available. false 17 Provision for depreciation 8 us-gaap_DepreciationNonproduction us-gaap true debit duration monetary The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful... false false false false false false false false false 1 false true 177000000 177 false true 2 false true 164000000 164 false true The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 4, 5 false 18 Amortization of regulatory assets 8 us-gaap_AmortizationOfRegulatoryAsset us-gaap true debit duration monetary The expense charged against earnings during the period to allocate the capitalized costs of regulatory assets over the... false false false false false false false false false 1 false true 411000000 411 false true 2 false true 258000000 258 false true The expense charged against earnings during the period to allocate the capitalized costs of regulatory assets over the periods expected to benefit from such costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 19 Deferral of new regulatory assets 8 fe_DeferralOfRegulatoryAsset fe false credit duration monetary Current period electric expenses of a regulated entity which are reclassified as capitalized electric costs and are expected... false false false false false false false false false 1 false true -93000000 -93 false true 2 false true -105000000 -105 false true Current period electric expenses of a regulated entity which are reclassified as capitalized electric costs and are expected to be recoverable through rate adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 9 -Publisher FASB false 20 General taxes 8 us-gaap_TaxesOtherThanIncomeExciseProductionAndPropertyTaxes us-gaap true debit duration monetary Taxes other than income taxes, if not included elsewhere, that could include, property tax or other selling and... false false false false false false false false false 1 false true 211000000 211 false true 2 false true 215000000 215 false true Taxes other than income taxes, if not included elsewhere, that could include, property tax or other selling and distribution-related taxes. No authoritative reference available. false 21 Total expenses 8 us-gaap_CostsAndExpenses us-gaap true debit duration monetary Total costs of sales and operating expenses for the period. false false false false false false false false false 1 false true 2988000000 2988 false true 2 false true 2659000000 2659 false true Total costs of sales and operating expenses for the period. No authoritative reference available. true 22 OPERATING INCOME 7 us-gaap_OperatingIncomeLoss us-gaap true credit duration monetary The net result for the period of deducting operating expenses from operating revenues. false false false false false false false false false 1 false true 346000000 346 false true 2 false true 618000000 618 false true The net result for the period of deducting operating expenses from operating revenues. No authoritative reference available. true 24 Investment income (loss), net 7 us-gaap_InvestmentIncomeInterestAndDividend us-gaap true credit duration monetary Income derived from investments in debt and equity securities and on cash and cash equivalents. Interest income represents... false false false false false false false false false 1 false true -11000000 -11 false true 2 false true 17000000 17 false true Income derived from investments in debt and equity securities and on cash and cash equivalents. Interest income represents earnings which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Dividend income represents a distribution of earnings to shareholders by investee companies. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 14 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph (b) -Subparagraph 7 a, b -Article 5 false 25 Interest expense 7 us-gaap_InterestAndDebtExpense us-gaap true debit duration monetary Interest and debt related expenses associated with nonoperating financing activities of the entity. false false false false false false false false false 1 false true -194000000 -194 false true 2 false true -179000000 -179 false true Interest and debt related expenses associated with nonoperating financing activities of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 false 26 Capitalized interest 7 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions us-gaap true credit duration monetary Total increase in earnings in the period representing the cost of equity (rate of return) and borrowed funds (interest rate)... false false false false false false false false false 1 false true 28000000 28 false true 2 false true 8000000 8 false true Total increase in earnings in the period representing the cost of equity (rate of return) and borrowed funds (interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 90 -Paragraph 8 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 92 -Paragraph 8, 9, 12 false 27 Total other expense 7 fe_TotalOtherExpense fe false na duration monetary The total of other income and expense items resulting from secondary business-related activities, excluding those considered... false false false false false false false false false 1 false true -177000000 -177 false true 2 false true -154000000 -154 false true The total of other income and expense items resulting from secondary business-related activities, excluding those considered part of the normal operations of the business that have not been previously categorized. No authoritative reference available. false 28 INCOME BEFORE INCOME TAXES 6 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap true credit duration monetary Sum of operating profit and nonoperating income (expense) before income taxes. false false false false false false false false false 1 false true 169000000 169 false true 2 false true 464000000 464 false true Sum of operating profit and nonoperating income (expense) before income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph (h) -Subparagraph (1)(i) -Article 4 true 29 Income Tax Expense (Benefit) [Abstract] 5 us-gaap_IncomeTaxExpenseBenefitAbstract 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 30 INCOME TAXES 6 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration monetary The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing... false false false false false false false false false 1 false true 54000000 54 false true 2 false true 187000000 187 false true The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations. 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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 32 Less: Noncontrolling interest income (loss) 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 33 EARNINGS AVAILABLE TO PARENT 2 fe_NetIncomeLossAttributedToParent fe false na duration monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the... false false false false false false false false false 1 true true 119000000 119 false true 2 true true 276000000 276 false true The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Reference 1: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Publisher AICPA -Publisher a Reference 2: http://www.xbrl.org/2003/role/reference -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Publisher AICPA -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/reference -Appendix A -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Publisher AICPA false 35 Earnings Per Share, Basic [Abstract] 2 us-gaap_EarningsPerShareBasicAbstract 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 36 BASIC EARNINGS PER SHARE OF COMMON STOCK 3 us-gaap_EarningsPerShareBasic us-gaap true na duration decimal The amount of net income or loss for the period per each share of common stock outstanding during the reporting period. false false false false false false false false false 1 false true 0.39 0.39 false true 2 false true 0.91 0.91 false true The amount of net income or loss for the period per each share of common stock outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph (b) -Subparagraph 20 -Article 5 false 37 Earnings Per Share, Basic, Other Disclosures [Abstract] 2 us-gaap_EarningsPerShareBasicOtherDisclosuresAbstract 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 38 WEIGHTED AVERAGE NUMBER OF BASIC SHARES OUTSTANDING 3 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic us-gaap true na duration shares Number of basic shares determined by relating the portion of time within a reporting period that common shares have been... false false false false false false false false false 1 false true 304000000 304000000.00 false true 2 false true 304000000 304000000.00 false true Number of basic shares determined by relating the portion of time within a reporting period that common shares have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 false 39 Earnings Per Share, Diluted [Abstract] 2 us-gaap_EarningsPerShareDilutedAbstract 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 40 DILUTED EARNINGS PER SHARE OF COMMON STOCK 3 us-gaap_EarningsPerShareDiluted us-gaap true na duration decimal The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents... false false false false false false false false false 1 false true 0.39 0.39 false true 2 false true 0.90 0.90 false true The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph (b) -Subparagraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 11, 12, 36 false 41 Earnings Per Share, Diluted, Other Disclosures [Abstract] 2 us-gaap_EarningsPerShareDilutedOtherDisclosuresAbstract 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 42 WEIGHTED AVERAGE NUMBER OF DILUTED SHARES OUTSTANDING 3 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration shares The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing... false false false false false false false false false 1 false true 306000000 306000000.00 false true 2 false true 307000000 307000000.00 false true The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 false 43 DIVIDENDS DECLARED PER SHARE OF COMMON STOCK 3 us-gaap_CommonStockDividendsPerShareDeclared us-gaap true na duration decimal Aggregate dividends declared during the period for each share of common stock outstanding. false false false false false false false false false 1 false true 0.55 0.55 false true 2 false true 0.55 0.55 false true Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 1 Includes $109 million of excise tax collections. 2 Includes $114 million of excise tax collections. false 2 33 true Millions NoRounding UnKnown true true