1.0.0.3 false 1000 - CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Share data, unless otherwise specified false 1 $ false false 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 false 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 3 $ false false 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 4 $ false false 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 5 REVENUES: 3 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 false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 6 Electric utilities 4 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 2791000000 2791 false false 2 true true 2865000000 2865 false false 3 true true 5811000000 5811 false false 4 true true 5778000000 5778 false false 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 7 Unregulated businesses 4 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 480000000 480 false false 2 false true 380000000 380 false false 3 false true 794000000 794 false false 4 false true 744000000 744 false false Revenue derived from the unregulated generation, transmission and distribution of electricity. No authoritative reference available. false 8 Total revenues 4 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 3271000000 3271 [4] false false 2 false true 3245000000 3245 [1] false false 3 false true 6605000000 6605 [2] false false 4 false true 6522000000 6522 [3] false false 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. 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No authoritative reference available. false 11 Purchased power 4 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 1024000000 1024 false false 2 false true 1070000000 1070 false false 3 false true 2167000000 2167 false false 4 false true 2070000000 2070 false false Cost of electricity purchased and sold during the reporting period. No authoritative reference available. false 12 Other operating expenses 4 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 612000000 612 false false 2 false true 781000000 781 false false 3 false true 1439000000 1439 false false 4 false true 1580000000 1580 false false 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 13 Provision for depreciation 4 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 185000000 185 false false 2 false true 168000000 168 false false 3 false true 362000000 362 false false 4 false true 332000000 332 false false The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 15 Deferral of regulatory assets 4 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 -45000000 -45 false false 2 false true -98000000 -98 false false 3 false true -136000000 -136 false false 4 false true -203000000 -203 false false Current period electric expenses of a regulated entity which are reclassified as capitalized electric costs and are expected to be recoverable through rate adjustments. No authoritative reference available. false 16 General taxes 4 us-gaap_TaxesExcludingIncomeAndExciseTaxes us-gaap true debit duration monetary All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not... false false false false false false false false false 1 false true 184000000 184 false false 2 false true 180000000 180 false false 3 false true 395000000 395 false false 4 false true 395000000 395 false false All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax. No authoritative reference available. false 17 Total expenses 4 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 2469000000 2469 false false 2 false true 2663000000 2663 false false 3 false true 5457000000 5457 false false 4 false true 5322000000 5322 false false Total costs of sales and operating expenses for the period. No authoritative reference available. true 18 OPERATING INCOME 3 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 802000000 802 false false 2 false true 582000000 582 false false 3 false true 1148000000 1148 false false 4 false true 1200000000 1200 false false The net result for the period of deducting operating expenses from operating revenues. No authoritative reference available. true 20 Investment income 4 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 27000000 27 false false 2 false true 16000000 16 false false 3 false true 16000000 16 false false 4 false true 33000000 33 false false 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 7 -Subparagraph a, b -Article 5 false 21 Interest expense 4 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 -206000000 -206 false false 2 false true -188000000 -188 false false 3 false true -400000000 -400 false false 4 false true -367000000 -367 false false 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 22 Capitalized interest 4 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 33000000 33 false false 2 false true 13000000 13 false false 3 false true 61000000 61 false false 4 false true 21000000 21 false false 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 23 Total other expense 4 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 -146000000 -146 false false 2 false true -159000000 -159 false false 3 false true -323000000 -323 false false 4 false true -313000000 -313 false false 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. true 24 INCOME BEFORE INCOME TAXES 3 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap true credit duration monetary Sum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes,... false false false false false false false false false 1 false true 656000000 656 false false 2 false true 423000000 423 false false 3 false true 825000000 825 false false 4 false true 887000000 887 false false Sum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest. 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 25 INCOME TAXES 3 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 248000000 248 false false 2 false true 160000000 160 false false 3 false true 302000000 302 false false 4 false true 347000000 347 false false 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 AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) true 27 Less: Noncontrolling interest income (loss) 3 fe_NetIncomeLossAttributableToNoncontrollingInterestIncomeStatement 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 -6000000 -6 false false 2 false false 0 0 false false 3 false true -10000000 -10 false false 4 false true 1000000 1 false false The portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent. No authoritative reference available. false 28 EARNINGS AVAILABLE TO FIRSTENERGY CORP. 3 us-gaap_NetIncomeLoss us-gaap true credit 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 414000000 414 false false 2 true true 263000000 263 false false 3 true true 533000000 533 false false 4 true true 539000000 539 false false 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/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 false 29 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 1.36 1.36 false false 2 false true 0.86 0.86 false false 3 false true 1.75 1.75 false false 4 false true 1.77 1.77 false false The amount of net income or loss for the period per each share of common stock outstanding during the reporting period. 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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 $100 million of excise tax collections. 2 Includes $204 million of excise tax collections. 3 Includes $214 million of excise tax collections. 4 Includes $95 million of excise tax collections. false 4 28 false Millions NoRounding UnKnown true true