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DEBT OBLIGATIONS Debt Obligations - Future Maturities (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Debt Instrument  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Long-term Debt, Maturities, Repayments of Principal in Year Two 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Long-term Debt, Maturities, Repayments of Principal in Year Three 300us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Long-term Debt, Maturities, Repayments of Principal in Year Four 400us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Long-term Debt, Maturities, Repayments of Principal in Year Five 150us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Long-term Debt, Maturities, Repayments of Principal after Year Five 241us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Long Term Debt Maturities Repayments Of Principal Total $ 1,091ete_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal