Consolidated Comprehensive Statements Of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Comprehensive Statements Of Earnings [Abstract]
Oil, gas and NGL sales	$ 9,910us-gaap_OilAndGasSalesRevenue	$ 8,522us-gaap_OilAndGasSalesRevenue	$ 7,153us-gaap_OilAndGasSalesRevenue
Oil, gas and NGL derivatives	1,989	(191)	693
Marketing and midstream revenues	7,667	2,066	1,655
Total operating revenues	19,566us-gaap_Revenues	10,397us-gaap_Revenues	9,501us-gaap_Revenues
Lease operating expenses	2,332us-gaap_LeaseOperatingExpense	2,268us-gaap_LeaseOperatingExpense	2,074us-gaap_LeaseOperatingExpense
Marketing and midstream operating expenses	6,815	1,553	1,246
General and administrative expenses	847us-gaap_GeneralAndAdministrativeExpense	617us-gaap_GeneralAndAdministrativeExpense	692us-gaap_GeneralAndAdministrativeExpense
Production and property taxes	535	461	414
Depreciation, depletion and amortization	3,319	2,780	2,811
Asset impairments	1,953us-gaap_AssetImpairmentCharges	1,976us-gaap_AssetImpairmentCharges	2,024us-gaap_AssetImpairmentCharges
Restructuring costs	46us-gaap_RestructuringCharges	54us-gaap_RestructuringCharges	74us-gaap_RestructuringCharges
Gains and losses on asset sales	(1,072)us-gaap_GainLossOnDispositionOfAssets1	9us-gaap_GainLossOnDispositionOfAssets1	(13)us-gaap_GainLossOnDispositionOfAssets1
Other operating items	93us-gaap_OtherCostAndExpenseOperating	112us-gaap_OtherCostAndExpenseOperating	105us-gaap_OtherCostAndExpenseOperating
Total operating expenses	14,868us-gaap_CostsAndExpenses	9,830us-gaap_CostsAndExpenses	9,427us-gaap_CostsAndExpenses
Operating income	4,698us-gaap_OperatingIncomeLoss	567us-gaap_OperatingIncomeLoss	74us-gaap_OperatingIncomeLoss
Net financing costs	526dvn_FinancingCostsNet	417dvn_FinancingCostsNet	370dvn_FinancingCostsNet
Other nonoperating items	113us-gaap_OtherNonoperatingIncomeExpense	1us-gaap_OtherNonoperatingIncomeExpense	21us-gaap_OtherNonoperatingIncomeExpense
Earnings (loss) from continuing operations before income taxes	4,059	149	(317)
Income tax expense (benefit)	2,368us-gaap_IncomeTaxExpenseBenefit	169us-gaap_IncomeTaxExpenseBenefit	(132)us-gaap_IncomeTaxExpenseBenefit
Earnings (loss) from continuing operations	1,691	(20)	(185)
Earnings (loss) from discontinued operations, net of tax			(21)
Net earnings (loss)	1,691us-gaap_ProfitLoss	(20)us-gaap_ProfitLoss	(206)us-gaap_ProfitLoss
Net earnings attributable to noncontrolling interests	84
Net earnings (loss) attributable to Devon	1,607us-gaap_NetIncomeLoss	(20)us-gaap_NetIncomeLoss	(206)us-gaap_NetIncomeLoss
Net earnings (loss) per share attributable to Devon:
Basic earnings (loss) from continuing operations per share	$ 3.93	$ (0.06)	$ (0.47)
Basic earnings (loss) from discontinued operations per share			$ (0.05)
Basic net earnings (loss) per share	$ 3.93us-gaap_EarningsPerShareBasic	$ (0.06)us-gaap_EarningsPerShareBasic	$ (0.52)us-gaap_EarningsPerShareBasic
Diluted earnings (loss) from continuing operations per share	$ 3.91	$ (0.06)	$ (0.47)
Diluted earnings (loss) from discontinued operations per share			$ (0.05)
Diluted net earnings (loss) per share	$ 3.91us-gaap_EarningsPerShareDiluted	$ (0.06)us-gaap_EarningsPerShareDiluted	$ (0.52)us-gaap_EarningsPerShareDiluted
Comprehensive earnings (loss):
Net earnings (loss)	1,691us-gaap_ProfitLoss	(20)us-gaap_ProfitLoss	(206)us-gaap_ProfitLoss
Other comprehensive earnings (loss), net of tax:
Foreign currency translation	(465)	(548)	194
Pension and postretirement plans	(24)	45	2
Other comprehensive earnings (loss), net of tax	(489)	(503)	196
Comprehensive earnings (loss)	1,202	(523)	(10)
Comprehensive earnings attributable to noncontrolling interests	84
Comprehensive earnings (loss) attributable to Devon	$ 1,118us-gaap_ComprehensiveIncomeNetOfTax	$ (523)us-gaap_ComprehensiveIncomeNetOfTax	$ (10)us-gaap_ComprehensiveIncomeNetOfTax

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