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Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net earnings (loss)	$ 1,691us-gaap_ProfitLoss	$ (20)us-gaap_ProfitLoss	$ (206)us-gaap_ProfitLoss
Earnings (loss) from discontinued operations, net of tax			21us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Adjustments to reconcile net earnings (loss) to net cash from operating activities:
Depreciation, depletion and amortization	3,319us-gaap_DepreciationDepletionAndAmortization	2,780us-gaap_DepreciationDepletionAndAmortization	2,811us-gaap_DepreciationDepletionAndAmortization
Asset impairments	1,953us-gaap_AssetImpairmentCharges	1,976us-gaap_AssetImpairmentCharges	2,024us-gaap_AssetImpairmentCharges
Gains and losses on asset sales	(1,072)us-gaap_GainLossOnDispositionOfAssets1	9us-gaap_GainLossOnDispositionOfAssets1	(13)us-gaap_GainLossOnDispositionOfAssets1
Deferred income tax expense (benefit)	1,891us-gaap_DeferredIncomeTaxExpenseBenefit	97us-gaap_DeferredIncomeTaxExpenseBenefit	(184)us-gaap_DeferredIncomeTaxExpenseBenefit
Derivatives and other financial instruments	(2,070)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	135us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	(660)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Cash settlements on derivatives and financial instruments	104dvn_CashSettlementsOnDerivativesAndFinancialInstruments	277dvn_CashSettlementsOnDerivativesAndFinancialInstruments	865dvn_CashSettlementsOnDerivativesAndFinancialInstruments
Other noncash charges	457us-gaap_OtherNoncashExpense	309us-gaap_OtherNoncashExpense	253us-gaap_OtherNoncashExpense
Net change in working capital	50us-gaap_IncreaseDecreaseInOperatingCapital	(298)us-gaap_IncreaseDecreaseInOperatingCapital	(50)us-gaap_IncreaseDecreaseInOperatingCapital
Change in long-term other assets	(421)us-gaap_IncreaseDecreaseInOtherOperatingAssets	10us-gaap_IncreaseDecreaseInOtherOperatingAssets	(36)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Change in long-term other liabilities	79us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	161us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	105us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Cash from operating activities - continuing operations	5,981us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	5,436us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	4,930us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash from operating activities - discontinued operations			26us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
Net cash from operating activities	5,981us-gaap_NetCashProvidedByUsedInOperatingActivities	5,436us-gaap_NetCashProvidedByUsedInOperatingActivities	4,956us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:
Capital expenditures	(6,988)us-gaap_PaymentsToAcquireProductiveAssets	(6,758)us-gaap_PaymentsToAcquireProductiveAssets	(8,225)us-gaap_PaymentsToAcquireProductiveAssets
Acquisitions of property, equipment and businesses	(6,462)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from property and equipment divestitures	5,120us-gaap_ProceedsFromSaleOfProductiveAssets	419us-gaap_ProceedsFromSaleOfProductiveAssets	1,468us-gaap_ProceedsFromSaleOfProductiveAssets
Purchases of short-term investments		(1,076)us-gaap_PaymentsToAcquireShortTermInvestments	(4,106)us-gaap_PaymentsToAcquireShortTermInvestments
Redemptions of short-term investments		3,419us-gaap_ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	3,266us-gaap_ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments
Redemptions of long-term investments	57us-gaap_ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities
Other	89us-gaap_PaymentsForProceedsFromOtherInvestingActivities	(3)us-gaap_PaymentsForProceedsFromOtherInvestingActivities	14us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Cash from investing activities - continuing operations	(8,184)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	(3,999)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	(7,583)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash from investing activities - discontinued operations			57us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
Net cash from investing activities	(8,184)us-gaap_NetCashProvidedByUsedInInvestingActivities	(3,999)us-gaap_NetCashProvidedByUsedInInvestingActivities	(7,526)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:
Proceeds from borrowings of long-term debt, net of issuance costs	5,340us-gaap_ProceedsFromDebtNetOfIssuanceCosts	2,233us-gaap_ProceedsFromDebtNetOfIssuanceCosts	3,208us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Net short-term debt repayments	(385)us-gaap_ProceedsFromRepaymentsOfCommercialPaper	(1,872)us-gaap_ProceedsFromRepaymentsOfCommercialPaper	(537)us-gaap_ProceedsFromRepaymentsOfCommercialPaper
Long-term debt repayments	(7,189)us-gaap_RepaymentsOfLongTermDebt		(750)us-gaap_RepaymentsOfLongTermDebt
Proceeds from stock option exercises	93us-gaap_ProceedsFromStockOptionsExercised	3us-gaap_ProceedsFromStockOptionsExercised	27us-gaap_ProceedsFromStockOptionsExercised
Proceeds from issuance of subsidiary units	410us-gaap_SaleOfStockConsiderationReceivedPerTransaction
Dividends paid on common stock	(386)us-gaap_PaymentsOfOrdinaryDividends	(348)us-gaap_PaymentsOfOrdinaryDividends	(324)us-gaap_PaymentsOfOrdinaryDividends
Distributions to noncontrolling interests	(235)us-gaap_PaymentsToMinorityShareholders
Other	(2)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities	4us-gaap_ProceedsFromPaymentsForOtherFinancingActivities	5us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash from financing activities	(2,354)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	20us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	1,629us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate changes on cash	(29)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents	(28)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents	23us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net change in cash and cash equivalents	(4,586)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease	1,429us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease	(918)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period	6,066us-gaap_CashAndCashEquivalentsAtCarryingValue	4,637us-gaap_CashAndCashEquivalentsAtCarryingValue	5,555us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period	$ 1,480us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 6,066us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 4,637us-gaap_CashAndCashEquivalentsAtCarryingValue

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