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Debt And Related Expenses (Schedule Of Debt Maturities) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Debt And Related Expenses [Abstract]  
2015 $ 1,432us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2016 350us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
2018 875us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
2019 1,337us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
2020 and thereafter 7,263us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Total debt $ 11,257dvn_LongTermDebtFutureMaturitiesExcludingPremiumsAndDiscounts