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USD ($)

USD ($) / shares

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{fe_RegionWiseEntityAxis} : West Virginia [Member]
1/1/2011 - 3/31/2011
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{fe_RegionWiseEntityAxis} : West Virginia [Member]
1/1/2011 - 3/31/2011
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{fe_RegionWiseEntityAxis} : West Virginia [Member]
1/1/2011 - 3/31/2011
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1/1/2011 - 3/31/2011
USD ($)

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1/1/2007 - 12/31/2007
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10/6/2009
USD ($)
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1/1/2011 - 3/31/2011
USD ($)
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{fe_RegionWiseEntityAxis} : Ohio Member
1/23/2009
USD ($)
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{fe_RegionWiseEntityAxis} : Ohio Member
1/23/2009
USD ($)
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{fe_RegionWiseEntityAxis} : Ohio Member
1/23/2009
USD ($)
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1/1/2011 - 3/31/2011
USD ($)
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1/1/2013 - 12/31/2013
</KeyName><CurrencySymbol /><contextRef><ContextID>TwelveMonthsEnded_31Dec2013_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2013-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2013-12-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>MWH</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>MWH</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="12 Months Ended" /><Label Id="2" Label="Dec. 31, 2013" /><Label Id="3" Label="Ohio" /></Labels></Column><Column><Id>14</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Ohio Member
1/1/2012 - 12/31/2012
</KeyName><CurrencySymbol /><contextRef><ContextID>TwelveMonthsEnded_31Dec2012_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2012-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2012-12-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>MWH</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>MWH</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="12 Months Ended" /><Label Id="2" Label="Dec. 31, 2012" /><Label Id="3" Label="Ohio" /></Labels></Column><Column><Id>15</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Ohio Member
1/1/2011 - 12/31/2011
</KeyName><CurrencySymbol /><contextRef><ContextID>TwelveMonthsEnded_31Dec2011_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-12-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>MWH</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>MWH</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="12 Months Ended" /><Label Id="2" Label="Dec. 31, 2011" /><Label Id="3" Label="Ohio" /></Labels></Column><Column><Id>16</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Ohio Member
1/1/2010 - 12/31/2010
</KeyName><CurrencySymbol /><contextRef><ContextID>TwelveMonthsEnded_31Dec2010_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2010-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2010-12-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>MWH</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>MWH</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="12 Months Ended" /><Label Id="2" Label="Dec. 31, 2010" /><Label Id="3" Label="Ohio" /></Labels></Column><Column><Id>17</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Ohio Member
1/1/2009 - 12/31/2009
</KeyName><CurrencySymbol /><contextRef><ContextID>TwelveMonthsEnded_31Dec2009_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2009-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2009-12-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>MWH</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>MWH</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty><UnitProperty><UnitID>Pure</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/instance</MeasureSchema><MeasureValue>pure</MeasureValue><MeasureNamespace>xbrli</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="12 Months Ended" /><Label Id="2" Label="Dec. 31, 2009" /><Label Id="3" Label="Ohio" /></Labels></Column><Column><Id>18</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Ohio Member
4/1/2009 - 12/31/2011
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>TwentyOneMonthsEnded_31Dec2011_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2009-04-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-12-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="33 Months Ended" /><Label Id="2" Label="Dec. 31, 2011" /><Label Id="3" Label="Ohio" /></Labels></Column><Column><Id>19</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Ohio Member
1/23/2009
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>BalanceAsOf_23Jan2009_Ohio_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>instant</PeriodType><PeriodStartDate>2009-01-23T00:00:00</PeriodStartDate><PeriodEndDate>0001-01-01T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Ohio</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_OhioMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="Jan. 23, 2009" /><Label Id="2" Label="Ohio" /></Labels></Column><Column><Id>20</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Pennsylvania Member
1/1/2011 - 3/31/2011
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>ThreeMonthsEnded_31Mar2011_Pennsylvania_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Pennsylvania</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_PennsylvaniaMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty><UnitProperty><UnitID>Pure</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/instance</MeasureSchema><MeasureValue>pure</MeasureValue><MeasureNamespace>xbrli</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /><Label Id="3" Label="Pennsylvania" /></Labels></Column><Column><Id>21</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Pennsylvania Member
5/31/2013
</KeyName><CurrencySymbol /><contextRef><ContextID>BalanceAsOf_31May2013_Pennsylvania_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>instant</PeriodType><PeriodStartDate>2013-05-31T00:00:00</PeriodStartDate><PeriodEndDate>0001-01-01T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Pennsylvania</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_PennsylvaniaMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>Pure</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/instance</MeasureSchema><MeasureValue>pure</MeasureValue><MeasureNamespace>xbrli</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="May 31, 2013" /><Label Id="2" Label="Pennsylvania" /></Labels></Column><Column><Id>22</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : Pennsylvania Member
5/31/2011
</KeyName><CurrencySymbol /><contextRef><ContextID>BalanceAsOf_31May2011_Pennsylvania_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>instant</PeriodType><PeriodStartDate>2011-05-31T00:00:00</PeriodStartDate><PeriodEndDate>0001-01-01T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Pennsylvania</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_PennsylvaniaMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>Pure</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/instance</MeasureSchema><MeasureValue>pure</MeasureValue><MeasureNamespace>xbrli</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="May 31, 2011" /><Label Id="2" Label="Pennsylvania" /></Labels></Column><Column><Id>23</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : West Virginia [Member]
1/1/2011 - 3/31/2011
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>ThreeMonthsEnded_31Mar2011_West_Virginia_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>West Virginia</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_WestVirginiaMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /><Label Id="3" Label="West Virginia" /></Labels></Column><Column><Id>24</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegionWiseEntityAxis} : California Claims Matters [Member]
1/1/2011 - 3/31/2011
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>ThreeMonthsEnded_31Mar2011_California_Claims_Matters_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>California Claims Matters</ValueName><ValueType>fe_RegionWiseEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_CaliforniaClaimsMattersMember</Id><dimensionId>fe_RegionWiseEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /><Label Id="3" Label="California Claims Matters" /></Labels></Column><Column><Id>25</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_CalculationErrorAxis} : Pjm Calculation Error Member
{fe_RegulatoryMattersAxis} : Ferc Member
1/1/2011 - 3/31/2011
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>ThreeMonthsEnded_31Mar2011_Ferc_Member_Pjm_Calculation_Error_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>PJM Calculation Error</ValueName><ValueType>fe_CalculationErrorAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_PjmCalculationErrorMember</Id><dimensionId>fe_CalculationErrorAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>FERC</ValueName><ValueType>fe_RegulatoryMattersAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_FercMember</Id><dimensionId>fe_RegulatoryMattersAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /><Label Id="3" Label="PJM Calculation Error" /><Label Id="4" Label="FERC" /></Labels></Column><Column><Id>26</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_CalculationErrorAxis} : Pjm Calculation Error Member
{fe_RegulatoryMattersAxis} : Ferc Member
4/1/2005 - 3/31/2010
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>SixtyMonthsEnded_31Mar2010_Ferc_Member_Pjm_Calculation_Error_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2005-04-01T00:00:00</PeriodStartDate><PeriodEndDate>2010-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>PJM Calculation Error</ValueName><ValueType>fe_CalculationErrorAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_PjmCalculationErrorMember</Id><dimensionId>fe_CalculationErrorAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>FERC</ValueName><ValueType>fe_RegulatoryMattersAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_FercMember</Id><dimensionId>fe_RegulatoryMattersAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="60 Months Ended" /><Label Id="2" Label="Mar. 31, 2010" /><Label Id="3" Label="PJM Calculation Error" /><Label Id="4" Label="FERC" /></Labels></Column><Column><Id>27</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegulatoryMattersAxis} : Ferc Member
1/1/2011 - 3/31/2011
USD ($)

</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>ThreeMonthsEnded_31Mar2011_Ferc_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>FERC</ValueName><ValueType>fe_RegulatoryMattersAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_FercMember</Id><dimensionId>fe_RegulatoryMattersAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty><UnitProperty><UnitID>KV</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>KV</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /><Label Id="3" Label="FERC" /></Labels></Column><Column><Id>28</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode /><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{fe_RegulatoryMattersAxis} : Ferc Member
{dei_LegalEntityAxis} : Trail [Member]
1/1/2011 - 3/31/2011
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{dei_LegalEntityAxis} : Path [Member]
10/20/2010 - 11/19/2010
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{dei_LegalEntityAxis} : Path [Member]
1/1/2011 - 3/31/2011
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1/1/2011 - 3/31/2011
USD ($)
</KeyName><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>ThreeMonthsEnded_31Mar2011_Penelec_Member</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001031296</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2011-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2011-03-31T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Penelec</ValueName><ValueType>dei_LegalEntityAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>fe_PenelecMember</Id><dimensionId>dei_LegalEntityAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Id="1" Label="3 Months Ended" /><Label Id="2" Label="Mar. 31, 2011" /><Label Id="3" Label="Penelec" /></Labels></Column><Column><Id>32</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelColumn>false</LabelColumn><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName>{dei_LegalEntityAxis} : Met-Ed [Member]
1/1/2011 - 3/31/2011
USD ($)
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8/23/2010
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/></contextRef><UPS><UnitProperty><UnitID>KV</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://firstenergycorp.com/2011-03-31</MeasureSchema><MeasureValue>KV</MeasureValue><MeasureNamespace>fe</MeasureNamespace></StandardMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Id="1" Label="Aug. 23, 2010" /><Label Id="2" Label="Met-Ed" /></Labels></Column></Columns><Rows><Row><Id>2</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><Level>0</Level><ElementName>fe_RegulatoryMattersTextualsAbstract</ElementName><ElementPrefix>fe</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><ShortDefinition>Regulatory 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/><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell><Cell><Id>2</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><NonNumericTextHeader /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios></Cell><Cell><Id>3</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><NonNumericTextHeader /><FootnoteIndexer /><CurrencyCode 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