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Derivative Financial Instruments (Schedule Of Gas Processing and Fractionation Open Positions) (Details)	12 Months Ended
	Dec. 31, 2014 MBbls
OPIS Mont Belvieu Texas Ethane Basis Swap Q1 2015 - Q4 2016 [Member]
Derivative [Line Items]
Volume (MBbls)	1,168us-gaap_DerivativeNonmonetaryNotionalAmountVolume / us-gaap_DerivativeInstrumentRiskAxis = dvn_OpisMontBelvieuTexasEthaneBasisSwapQuarterOne2015ThroughQuarterFour2016Member
Weighted average price paid	Index
Weighted average price received	$0.29/gal
OPIS Mont Belvieu Texas Propane Basis Swap Q1 2015 - Q4 2016 [Member]
Derivative [Line Items]
Volume (MBbls)	1,171us-gaap_DerivativeNonmonetaryNotionalAmountVolume / us-gaap_DerivativeInstrumentRiskAxis = dvn_OpisMontBelvieuTexasPropaneBasisSwapQuarterOne2015ThroughQuarterFour2016Member
Weighted average price paid	Index
Weighted average price received	$1.01/gal
OPIS Mont Belvieu Texas Normal Butane Basis Swap Q1 - Q4 2015 [Member]
Derivative [Line Items]
Volume (MBbls)	53us-gaap_DerivativeNonmonetaryNotionalAmountVolume / us-gaap_DerivativeInstrumentRiskAxis = dvn_OpisMontBelvieuTexasNormalButaneBasisSwapQuarterOneThroughQuarterFour2015Member
Weighted average price paid	Index
Weighted average price received	$1.14/gal
OPIS Mont Belvieu Texas Natural Gasoline Basis Swap Q1 - Q4 2015 [Member]
Derivative [Line Items]
Volume (MBbls)	44us-gaap_DerivativeNonmonetaryNotionalAmountVolume / us-gaap_DerivativeInstrumentRiskAxis = dvn_OpisMontBelvieuTexasNaturalGasolineBasisSwapQuarterOneThroughQuarterFour2015Member
Weighted average price paid	Index
Weighted average price received	$1.81/gal
Henry Hub Natural Gas Basis Swap Q1 - Q4 2015 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d)	1,225us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure / us-gaap_DerivativeInstrumentRiskAxis = dvn_HenryHubNaturalGasBasisSwapQuarterOneThroughQuarterFour2015Member
Weighted average price paid	$4.08/MMBtu
Weighted average price received	Index

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