2.2.0.25truefalse06096 - Disclosure - Income Taxes (Details 6)truefalseIn Thousandsfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Jan-01-2010_Dec-31-2010http://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2009http://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2008http://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes3false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse776000000776000falsetruefalsefalsefalse2truefalsefalse753000000753000falsetruefalsefalsefalse3truefalsefalse778000000778000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax.No authoritative reference available.truefalseTotal general taxes4false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFE [Member]5true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes6false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse776000000776000falsefalsefalsefalsefalse2truefalsefalse753000000753000falsefalsefalsefalsefalse3truefalsefalse778000000778000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes7false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Kilowatt_Hour_Excise_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Kilowatt_Hour_Excise_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Kilowatt_Hour_Excise_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFE [Member] | Kilowatt hour excise [Member]8true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes9false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse245000000245000falsefalsefalsefalsefalse2truefalsefalse224000000224000falsefalsefalsefalsefalse3truefalsefalse249000000249000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes10false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_State_Gross_Receipts_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$11falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_State_Gross_Receipts_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$12falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_State_Gross_Receipts_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFE [Member] | State gross receipts [Member]11true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes12false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse185000000185000falsefalsefalsefalsefalse2truefalsefalse171000000171000falsefalsefalsefalsefalse3truefalsefalse183000000183000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes13false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Real_And_Personal_Property_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$14falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$15falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFE [Member] | Real and personal property [Member]14true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes15false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse243000000243000falsefalsefalsefalsefalse2truefalsefalse253000000253000falsefalsefalsefalsefalse3truefalsefalse240000000240000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes16false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Social_Security_And_Unemployment_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$17falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$18falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFE [Member] | Social security and unemployment [Member]17true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes18false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse8600000086000falsefalsefalsefalsefalse2truefalsefalse9000000090000falsefalsefalsefalsefalse3truefalsefalse9500000095000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes19false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse19falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Others_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$20falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Others_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$21falsefalseUSDtruefalse{dei_LegalEntityAxis} : FE [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Others_Member_Fe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FeMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFE [Member] | Others [Member]20true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes21false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1700000017000falsefalsefalsefalsefalse2truefalsefalse1500000015000falsefalsefalsefalsefalse3truefalsefalse1100000011000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes22false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse22falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$23falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$24falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member]23true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes24false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse9377700093777falsefalsefalsefalsefalse2truefalsefalse8691500086915falsefalsefalsefalsefalse3truefalsefalse8800400088004falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes25false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse25falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Kilowatt_Hour_Excise_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$26falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Kilowatt_Hour_Excise_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$27falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Kilowatt_Hour_Excise_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member] | Kilowatt hour excise [Member]26true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes27false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse50000005000falsefalsefalsefalsefalse2truefalsefalse10000001000falsefalsefalsefalsefalse3truefalsefalse10000001000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes28false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse28falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_State_Gross_Receipts_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$29falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_State_Gross_Receipts_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$30falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_State_Gross_Receipts_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member] | State gross receipts [Member]29true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes30false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1700000017000falsefalsefalsefalsefalse2truefalsefalse1400000014000falsefalsefalsefalsefalse3truefalsefalse1600000016000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes31false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse31falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Real_And_Personal_Property_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$32falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$33falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member] | Real and personal property [Member]32true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes33false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse5300000053000falsefalsefalsefalsefalse2truefalsefalse5300000053000falsefalsefalsefalsefalse3truefalsefalse5300000053000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes34false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse34falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Social_Security_And_Unemployment_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$35falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$36falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member] | Social security and unemployment [Member]35true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes36false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1400000014000falsefalsefalsefalsefalse2truefalsefalse1400000014000falsefalsefalsefalsefalse3truefalsefalse1400000014000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes37false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse37falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Others_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$38falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Others_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$39falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Others_Member_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member] | Others [Member]38true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes39false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse50000005000falsefalsefalsefalsefalse2truefalsefalse50000005000falsefalsefalsefalsefalse3truefalsefalse40000004000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes40false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse40falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$41falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$42falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member]41true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes42false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse183000000183000falsefalsefalsefalsefalse2truefalsefalse171000000171000falsefalsefalsefalsefalse3truefalsefalse186000000186000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes43false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse43falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Kilowatt_Hour_Excise_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$44falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Kilowatt_Hour_Excise_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$45falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Kilowatt_Hour_Excise_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member] | Kilowatt hour excise [Member]44true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes45false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse9200000092000falsefalsefalsefalsefalse2truefalsefalse8400000084000falsefalsefalsefalsefalse3truefalsefalse9700000097000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes46false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse46falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Oe_Member_State_Gross_Receipts_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$47falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_State_Gross_Receipts_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$48falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_State_Gross_Receipts_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member] | State gross receipts [Member]47true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes48false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1500000015000falsefalsefalsefalsefalse2truefalsefalse1500000015000falsefalsefalsefalsefalse3truefalsefalse1700000017000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes49false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse49falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Oe_Member_Real_And_Personal_Property_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$50falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$51falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member] | Real and personal property [Member]50true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes51false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6700000067000falsefalsefalsefalsefalse2truefalsefalse6400000064000falsefalsefalsefalsefalse3truefalsefalse6100000061000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes52false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse52falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Oe_Member_Social_Security_And_Unemployment_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$53falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$54falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member] | Social security and unemployment [Member]53true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes54false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse80000008000falsefalsefalsefalsefalse2truefalsefalse80000008000falsefalsefalsefalsefalse3truefalsefalse90000009000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes55false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse55falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Oe_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$56falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Oe_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member] | Others [Member]56true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes57false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse10000001000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse20000002000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes58false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse57falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$58falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$59falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCEI [Member]59true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes60false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse143000000143000falsefalsefalsefalsefalse2truefalsefalse145000000145000falsefalsefalsefalsefalse3truefalsefalse143000000143000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes61false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse60falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Kilowatt_Hour_Excise_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$61falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Kilowatt_Hour_Excise_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$62falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Kilowatt_Hour_Excise_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCEI [Member] | Kilowatt hour excise [Member]62true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes63false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6800000068000falsefalsefalsefalsefalse2truefalsefalse6600000066000falsefalsefalsefalsefalse3truefalsefalse7000000070000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes64false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse63falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Cei_Member_Real_And_Personal_Property_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$64falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$65falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCEI [Member] | Real and personal property [Member]65true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes66false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse7000000070000falsefalsefalsefalsefalse2truefalsefalse7400000074000falsefalsefalsefalsefalse3truefalsefalse6700000067000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes67false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse66falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Cei_Member_Social_Security_And_Unemployment_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$67falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$68falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCEI [Member] | Social security and unemployment [Member]68true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes69false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse50000005000falsefalsefalsefalsefalse2truefalsefalse50000005000falsefalsefalsefalsefalse3truefalsefalse60000006000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes70false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse69falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Te_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$70falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Te_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$71falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Te_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTE [Member]71true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes72false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse5200000052000falsefalsefalsefalsefalse2truefalsefalse4800000048000falsefalsefalsefalsefalse3truefalsefalse5200000052000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes73false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse72falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Kilowatt_Hour_Excise_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$73falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Kilowatt_Hour_Excise_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$74falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Kilowatt_Hour_Excise_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTE [Member] | Kilowatt hour excise [Member]74true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes75false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse2700000027000falsefalsefalsefalsefalse2truefalsefalse2400000024000falsefalsefalsefalsefalse3truefalsefalse3000000030000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes76false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse75falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Te_Member_Real_And_Personal_Property_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$76falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$77falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTE [Member] | Real and personal property [Member]77true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes78false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse2300000023000falsefalsefalsefalsefalse2truefalsefalse2100000021000falsefalsefalsefalsefalse3truefalsefalse1900000019000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes79false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse78falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Te_Member_Social_Security_And_Unemployment_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$79falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$80falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Te_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTE [Member] | Social security and unemployment [Member]80true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes81false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse20000002000falsefalsefalsefalsefalse2truefalsefalse30000003000falsefalsefalsefalsefalse3truefalsefalse30000003000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes82false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse81falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$82falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$83falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseJCP&L [Member]83true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes84false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6500000065000falsefalsefalsefalsefalse2truefalsefalse6300000063000falsefalsefalsefalsefalse3truefalsefalse6700000067000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes85false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse84falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Kilowatt_Hour_Excise_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$85falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Kilowatt_Hour_Excise_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$86falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Kilowatt hour excise [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Kilowatt_Hour_Excise_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseKilowatt hour excise [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_KilowattHourExciseMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseJCP&L [Member] | Kilowatt hour excise [Member]86true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes87false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse5100000051000falsefalsefalsefalsefalse2truefalsefalse4900000049000falsefalsefalsefalsefalse3truefalsefalse5100000051000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes88false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse87falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Jcp_And_L_Member_Real_And_Personal_Property_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$88falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$89falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseJCP&L [Member] | Real and personal property [Member]89true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes90false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse50000005000falsefalsefalsefalsefalse2truefalsefalse50000005000falsefalsefalsefalsefalse3truefalsefalse50000005000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes91false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse90falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Jcp_And_L_Member_Social_Security_And_Unemployment_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$91falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$92falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseJCP&L [Member] | Social security and unemployment [Member]92true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes93false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse90000009000falsefalsefalsefalsefalse2truefalsefalse90000009000falsefalsefalsefalsefalse3truefalsefalse1000000010000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes94false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse93falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Jcp_And_L_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseJCP&L [Member] | Others [Member]95true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes96false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse10000001000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes97false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse94falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$95falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$96falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMet-Ed [Member]98true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes99false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse8800000088000falsefalsefalsefalsefalse2truefalsefalse8800000088000falsefalsefalsefalsefalse3truefalsefalse8600000086000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes100false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse97falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Met_Ed_Member_State_Gross_Receipts_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$98falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_State_Gross_Receipts_Member_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$99falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_State_Gross_Receipts_Member_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMet-Ed [Member] | State gross receipts [Member]101true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes102false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse8500000085000falsefalsefalsefalsefalse2truefalsefalse7800000078000falsefalsefalsefalsefalse3truefalsefalse7900000079000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes103false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse100falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$101falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMet-Ed [Member] | Real and personal property [Member]104true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes105false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse20000002000falsefalsefalsefalsefalse3truefalsefalse30000003000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes106false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse102falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Met_Ed_Member_Social_Security_And_Unemployment_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$103falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$104falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMet-Ed [Member] | Social security and unemployment [Member]107true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes108false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse40000004000falsefalsefalsefalsefalse2truefalsefalse50000005000falsefalsefalsefalsefalse3truefalsefalse50000005000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes109false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse105falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Met_Ed_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$106falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Met_Ed_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$107falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Met_Ed_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMet-Ed [Member] | Others [Member]110true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes111false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-1000000-1000falsefalsefalsefalsefalse2truefalsefalse30000003000falsefalsefalsefalsefalse3truefalsefalse-1000000-1000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes112false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse108falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$109falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$110falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePenelec [Member]113true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes114false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse7300000073000falsefalsefalsefalsefalse2truefalsefalse7400000074000falsefalsefalsefalsefalse3truefalsefalse8000000080000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes115false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse111falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Penelec_Member_State_Gross_Receipts_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$112falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_State_Gross_Receipts_Member_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$113falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : State gross receipts [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_State_Gross_Receipts_Member_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseState gross receipts [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_StateGrossReceiptsMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePenelec [Member] | State gross receipts [Member]116true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes117false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6800000068000falsefalsefalsefalsefalse2truefalsefalse6300000063000falsefalsefalsefalsefalse3truefalsefalse7000000070000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes118false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse114falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Penelec_Member_Real_And_Personal_Property_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$115falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Real_And_Personal_Property_Member_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$116falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Real and personal property [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Real_And_Personal_Property_Member_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseReal and personal property [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_RealAndPersonalPropertyMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePenelec [Member] | Real and personal property [Member]119true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes120false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-1000000-1000falsefalsefalsefalsefalse2truefalsefalse20000002000falsefalsefalsefalsefalse3truefalsefalse20000002000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes121false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse117falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Penelec_Member_Social_Security_And_Unemployment_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$118falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Social_Security_And_Unemployment_Member_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$119falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Social security and unemployment [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Social_Security_And_Unemployment_Member_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseSocial security and unemployment [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_SocialSecurityAndUnemploymentMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePenelec [Member] | Social security and unemployment [Member]122true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes123false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse50000005000falsefalsefalsefalsefalse2truefalsefalse60000006000falsefalsefalsefalsefalse3truefalsefalse60000006000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes124false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/incometaxesdetails61falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse120falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Penelec_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$121falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2009 - 12/31/2009 USD ($) $TwelveMonthsEnded_31Dec2009_Penelec_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$122falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] {us-gaap_StatementScenarioAxis} : Others [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Penelec_Member_Others_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberfalsefalseOthers [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldife_OthersMemberus-gaap_StatementScenarioAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePenelec [Member] | Others [Member]125true0us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseGeneral Taxes126false0us-gaap_TaxesExcludingIncomeAndExciseTaxesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse10000001000falsetruefalsefalsefalse2truefalsefalse30000003000falsetruefalsefalsefalse3truefalsefalse20000002000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAll 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.truefalseTotal general taxes3125Income Taxes (Details 6) (USD $)ThousandsUnKnownUnKnownUnKnownfalsetrue