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Debt And Related Expenses (Schedule Of Debt For GeoSouthern Acquisition) (Details) (USD $)	0 Months Ended	1 Months Ended				12 Months Ended
	Nov. 13, 2014	May 31, 2012	Jul. 31, 2011	Jan. 31, 2009	Mar. 31, 2002	Dec. 31, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Discount and issuance costs		$ (35,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts	$ (29,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts	$ (13,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts	$ (14,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts
Net proceeds		2,465,000,000us-gaap_ProceedsFromUnsecuredNotesPayable	2,221,000,000us-gaap_ProceedsFromUnsecuredNotesPayable	1,187,000,000us-gaap_ProceedsFromUnsecuredNotesPayable	986,000,000us-gaap_ProceedsFromUnsecuredNotesPayable
Early retirement of senior notes	1,900,000,000us-gaap_EarlyRepaymentOfSeniorDebt
Floating Rate due December 15, 2015 [Member]
Debt Instrument [Line Items]
Debt, maturity date						Dec. 15, 2015		Dec. 15, 2015
Floating Rate Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt, maturity date						Dec. 15, 2016		Dec. 15, 2016
1.20% Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage						1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember		1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
Debt, maturity date						Dec. 15, 2016		Dec. 15, 2016
Early retirement of senior notes						650,000,000us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
2.25% Due December 15, 2018 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage						2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember		2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
Debt, maturity date						Dec. 15, 2018		Dec. 15, 2018
GeoSouthern Intermediate Holdings, LLC [Member]
Debt Instrument [Line Items]
Discount and issuance costs						(2,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember
Net proceeds						2,248,000,000us-gaap_ProceedsFromUnsecuredNotesPayable / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember
GeoSouthern Intermediate Holdings, LLC [Member] | Floating Rate due December 15, 2015 [Member]
Debt Instrument [Line Items]
Debt, maturity date						Dec. 15, 2015
Principal amount of senior notes issued						500,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandFifteenMember
GeoSouthern Intermediate Holdings, LLC [Member] | Floating Rate Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt, maturity date						Dec. 15, 2016
Principal amount of senior notes issued						350,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandSixteenMember
GeoSouthern Intermediate Holdings, LLC [Member] | 1.20% Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage						1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
Debt, maturity date						Dec. 15, 2016
Principal amount of senior notes issued						650,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember	[1]
GeoSouthern Intermediate Holdings, LLC [Member] | 2.25% Due December 15, 2018 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage						2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
Debt, maturity date						Dec. 15, 2018
Principal amount of senior notes issued						750,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
[1] The 1.20% $650 million note due December 15, 2016 was redeemed on November 13, 2014.

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