Consolidated Comprehensive Statements Of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Consolidated Comprehensive Statements Of Earnings [Abstract]
Oil, gas and NGL sales	$ 1,339us-gaap_OilAndGasSalesRevenue	$ 2,557us-gaap_OilAndGasSalesRevenue
Oil, gas and NGL derivatives	294	(320)
Marketing and midstream revenues	1,632	1,488
Total operating revenues	3,265us-gaap_Revenues	3,725us-gaap_Revenues
Lease operating expenses	553us-gaap_LeaseOperatingExpense	598us-gaap_LeaseOperatingExpense
Marketing and midstream operating expenses	1,439	1,305
General and administrative expenses	251us-gaap_GeneralAndAdministrativeExpense	211us-gaap_GeneralAndAdministrativeExpense
Production and property taxes	108	137
Depreciation, depletion and amortization	930	739
Asset impairments	5,460us-gaap_AssetImpairmentCharges
Restructuring costs		37us-gaap_RestructuringCharges
Gains and losses on asset sales		(15)us-gaap_GainLossOnDispositionOfAssets1
Other operating items	19us-gaap_OtherCostAndExpenseOperating	23us-gaap_OtherCostAndExpenseOperating
Total operating expenses	8,760us-gaap_CostsAndExpenses	3,035us-gaap_CostsAndExpenses
Operating income (loss)	(5,495)us-gaap_OperatingIncomeLoss	690us-gaap_OperatingIncomeLoss
Net financing costs	117dvn_FinancingCostsNet	112dvn_FinancingCostsNet
Other nonoperating items	12us-gaap_OtherNonoperatingIncomeExpense	18us-gaap_OtherNonoperatingIncomeExpense
Earnings (loss) before income taxes	(5,624)	560
Income tax expense (benefit)	(2,035)us-gaap_IncomeTaxExpenseBenefit	231us-gaap_IncomeTaxExpenseBenefit
Net earnings (loss)	(3,589)us-gaap_ProfitLoss	329us-gaap_ProfitLoss
Net earnings attributable to noncontrolling interests	10	5
Net earnings (loss) attributable to Devon	(3,599)us-gaap_NetIncomeLoss	324us-gaap_NetIncomeLoss
Net earnings (loss) per share attributable to Devon:
Basic	$ (8.88)us-gaap_EarningsPerShareBasic	$ 0.80us-gaap_EarningsPerShareBasic
Diluted	$ (8.88)us-gaap_EarningsPerShareDiluted	$ 0.79us-gaap_EarningsPerShareDiluted
Comprehensive earnings (loss):
Net earnings (loss)	(3,589)us-gaap_ProfitLoss	329us-gaap_ProfitLoss
Other comprehensive loss, net of tax:
Foreign currency translation	(302)	(298)
Pension and postretirement plans	4	3
Other comprehensive loss, net of tax	(298)	(295)
Comprehensive earnings (loss)	(3,887)	34
Comprehensive earnings attributable to noncontrolling interests	10	5
Comprehensive earnings (loss) attributable to Devon	$ (3,897)us-gaap_ComprehensiveIncomeNetOfTax	$ 29us-gaap_ComprehensiveIncomeNetOfTax

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