2.2.0.25truefalse0607 - Disclosure - Leases (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse1/1/2010 - 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$2true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases3false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse228000000228falsetruefalsefalsefalse2truefalsefalse236000000236falsetruefalsefalsefalse3truefalsefalse381000000381falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases4true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases5false0us-gaap_CapitalLeasesIncomeStatementInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse20000002falsefalsefalsefalsefalse2truefalsefalse10000001falsefalsefalsefalsefalse3truefalsefalse10000001falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe financing charge for leasing arrangements meeting the criteria for capitalization.No authoritative reference available.falsefalseInterest element6false0fe_CapitalLeasesIncomeStatementOtherExpensefefalsedebitdurationCapital Leases Income Statement Other Expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1100000011falsefalsefalsefalsefalse2truefalsefalse60000006falsefalsefalsefalsefalse3truefalsefalse60000006falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCapital Leases Income Statement Other Expense.No authoritative reference available.truefalseOther7false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse241000000241falsefalsefalsefalsefalse2truefalsefalse243000000243falsefalsefalsefalsefalse3truefalsefalse388000000388falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals8false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{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$5falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] 1/1/2009 - 12/31/2009 USD ($) $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$6falsefalseUSDtruefalse{dei_LegalEntityAxis} : FES [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Fes_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseFES [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_FesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFES [Member]9true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases10false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse202000000202falsefalsefalsefalsefalse2truefalsefalse202000000202falsefalsefalsefalsefalse3truefalsefalse173000000173falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases11true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases12false0us-gaap_CapitalLeasesIncomeStatementInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse10000001falsefalsefalsefalsefalse2truefalsefalse20000002falsefalsefalsefalsefalse3truefalsefalse10000001falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe financing charge for leasing arrangements meeting the criteria for capitalization.No authoritative reference available.falsefalseInterest element13false0fe_CapitalLeasesIncomeStatementOtherExpensefefalsedebitdurationCapital Leases Income Statement Other Expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse1000000010falsefalsefalsefalsefalse2truefalsefalse1000000010falsefalsefalsefalsefalse3truefalsefalse80000008falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCapital Leases Income Statement Other Expense.No authoritative reference available.truefalseOther14false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse213000000213falsefalsefalsefalsefalse2truefalsefalse214000000214falsefalsefalsefalsefalse3truefalsefalse182000000182falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals15false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{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$8falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] 1/1/2009 - 12/31/2009 USD ($) $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$9falsefalseUSDtruefalse{dei_LegalEntityAxis} : OE [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Oe_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_OeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOE [Member]16true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases17false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse147000000147falsefalsefalsefalsefalse2truefalsefalse146000000146falsefalsefalsefalsefalse3truefalsefalse146000000146falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases18true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases19false0us-gaap_CapitalLeasesIncomeStatementInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe financing charge for leasing arrangements meeting the criteria for capitalization.No authoritative reference available.falsefalseInterest element20false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse147000000147falsefalsefalsefalsefalse2truefalsefalse147000000147falsefalsefalsefalsefalse3truefalsefalse146000000146falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals21false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{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$11falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] 1/1/2009 - 12/31/2009 USD ($) $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$12falsefalseUSDtruefalse{dei_LegalEntityAxis} : CEI [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Cei_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseCEI [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_CeiMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCEI [Member]22true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases23false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse40000004falsefalsefalsefalsefalse2truefalsefalse40000004falsefalsefalsefalsefalse3truefalsefalse50000005falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases24true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases25false0us-gaap_CapitalLeasesIncomeStatementInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse10000001falsefalsefalsefalsefalse2truefalsefalse10000001falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe financing charge for leasing arrangements meeting the criteria for capitalization.No authoritative reference available.falsefalseInterest element26false0fe_CapitalLeasesIncomeStatementOtherExpensefefalsedebitdurationCapital Leases Income Statement Other Expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse10000001falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCapital Leases Income Statement Other Expense.No authoritative reference available.truefalseOther27false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse50000005falsefalsefalsefalsefalse2truefalsefalse50000005falsefalsefalsefalsefalse3truefalsefalse60000006falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals28false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{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$14falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] 1/1/2009 - 12/31/2009 USD ($) $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$15falsefalseUSDtruefalse{dei_LegalEntityAxis} : TE [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Te_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseTE [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_TeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTE [Member]29true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases30false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse6400000064falsefalsefalsefalsefalse2truefalsefalse6400000064falsefalsefalsefalsefalse3truefalsefalse6500000065falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases31true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases32false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6400000064falsefalsefalsefalsefalse2truefalsefalse6400000064falsefalsefalsefalsefalse3truefalsefalse6500000065falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals33false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{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$17falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] 1/1/2009 - 12/31/2009 USD ($) $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$18falsefalseUSDtruefalse{dei_LegalEntityAxis} : JCP&L [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Jcp_And_L_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseJCP&L [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_JcpAndLMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseJCP&L [Member]34true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases35false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse90000009falsefalsefalsefalsefalse2truefalsefalse90000009falsefalsefalsefalsefalse3truefalsefalse80000008falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases36true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases37false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse90000009falsefalsefalsefalsefalse2truefalsefalse90000009falsefalsefalsefalsefalse3truefalsefalse80000008falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals38false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse19falsefalseUSDtruefalse{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$20falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] 1/1/2009 - 12/31/2009 USD ($) $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$21falsefalseUSDtruefalse{dei_LegalEntityAxis} : Met-Ed [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Met_Ed_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseMet-Ed [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_MetEdMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMet-Ed [Member]39true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases40false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse70000007falsefalsefalsefalsefalse2truefalsefalse70000007falsefalsefalsefalsefalse3truefalsefalse40000004falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases41true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases42false0fe_CapitalLeasesIncomeStatementOtherExpensefefalsedebitdurationCapital Leases Income Statement Other Expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse10000001falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCapital Leases Income Statement Other Expense.No authoritative reference available.truefalseOther43false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse80000008falsefalsefalsefalsefalse2truefalsefalse70000007falsefalsefalsefalsefalse3truefalsefalse40000004falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals44false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://firstenergycorp.com/role/leasesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse22falsefalseUSDtruefalse{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$23falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] 1/1/2009 - 12/31/2009 USD ($) $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$24falsefalseUSDtruefalse{dei_LegalEntityAxis} : Penelec [Member] 1/1/2008 - 12/31/2008 USD ($) $TwelveMonthsEnded_31Dec2008_Penelec_Memberhttp://www.sec.gov/CIK0001031296duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePenelec [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldife_PenelecMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePenelec [Member]45true0fe_CapitalLeasesAndOperatingLeasesRentExpenseAbstractfefalsenadurationCapital leases and operating leases rent expense.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCapital leases and operating leases rent expense.falsefalseRentals for capital and operating leases46false0us-gaap_LeaseAndRentalExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse40000004falsefalsefalsefalsefalse2truefalsefalse40000004falsefalsefalsefalsefalse3truefalsefalse40000004falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c falsefalseOperating leases47true0us-gaap_LeasesCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseCapital leases48false0fe_OperatingAndCapitalLeasesExpensesfefalsedebitdurationOperating And Capital Leases Expenses.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse40000004falsetruefalsefalsefalse2truefalsefalse40000004falsetruefalsefalsefalse3truefalsefalse40000004falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating And Capital Leases Expenses.No authoritative reference available.truefalseTotal rentals347Leases (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue