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    <Log type="Info">'Monetary' elements on report '4014 - Disclosure - Basis of Presentation and Significant Accounting Policies (Details 5)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4020 - Disclosure - Acquisitions and Divestitures (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4060 - Disclosure - Property, Plant and Equipment (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4070 - Disclosure - Long Term Debt (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4110 - Disclosure - Related Party Transactions (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 0010 - Statement - CONSOLIDATED STATEMENTS OF INCOME</Log>
    <Log type="Info">Process Flow-Through: 0020 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</Log>
    <Log type="Info">Process Flow-Through: 0025 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 0030 - Statement - CONSOLIDATED BALANCE SHEETS</Log>
    <Log type="Info">Process Flow-Through: 0035 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 0040 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</Log>
  </Logs>
  <InputFiles>
    <File>epnrg-20131231.xml</File>
    <File>epnrg-20131231.xsd</File>
    <File>epnrg-20131231_cal.xml</File>
    <File>epnrg-20131231_def.xml</File>
    <File>epnrg-20131231_lab.xml</File>
    <File>epnrg-20131231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
