2.2.0.7 false New Accounting Standards and Interpretations (Policies) 00311 - Disclosure - New Accounting Standards and Interpretations (Policies) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Tons Standard http://firstenergycorp.com/20100331 tons fe 0 Percent Standard http://www.xbrl.org/2003/instance pure xbrli 0 kV Standard http://firstenergycorp.com/20100331 kV fe 0 Customers Standard http://firstenergycorp.com/20100331 Customers fe 0 Days Standard http://firstenergycorp.com/20100331 Days fe 0 EPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 New Accounting Standards and Interpretations (Policies) [Abstract] 0 fe_NewAccountingStandardsAndInterpretationsPoliciesAbstract fe false na duration New Accounting Standards And Interpretations Policies. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string New Accounting Standards And Interpretations Policies. false 3 Derivatives and Hedging Topic [Text Block] 1 fe_DerivativesAndHedgingTopicPolicyTextBlock fe false na duration Derivatives and Hedging Topic policy Text Block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 In 2010, the FASB amended the Derivatives and Hedging Topic of the FASB Accounting Standards Codification to clarify the scope exception for embedded credit derivative features related to the transfer of credit risk in the form of subordination of one financial instrument to another. The amendment addresses how to determine which embedded credit derivative features, including those in collateralized debt obligations and synthetic collateralized debt obligations, are considered to be embedded derivatives that should not be analyzed under the Derivatives and Hedging Topic for potential bifurcation and separate accounting. The amendment is effective for the first fiscal quarter beginning after June 15, 2010. FirstEnergy does not expect this standard to have a material effect on its financial statements.  In 2010, the FASB amended the Derivatives and Hedging Topic of the FASB Accounting Standards Codification to clarify the scope exception for embedded credit false false false us-types:textBlockItemType textblock Derivatives and Hedging Topic policy Text Block. No authoritative reference available. false 1 2 false UnKnown UnKnown UnKnown false true