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Income Taxes (Schedule Of Effective Income Tax Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Total income tax expense (benefit)	$ 2,368us-gaap_IncomeTaxExpenseBenefit	$ 169us-gaap_IncomeTaxExpenseBenefit	$ (132)us-gaap_IncomeTaxExpenseBenefit
U.S. statutory income tax rate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	(35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Non-deductible goodwill transactions	23.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
Taxation on Canadian operations	(4.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	9.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	(6.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
State income taxes	2.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	23.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	6.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Repatriations	2.00%us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	65.00%us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings
Taxes on EnLink formation	1.00%dvn_EffectiveIncomeTaxRateReconciliationFormationOfEntity	0.00%dvn_EffectiveIncomeTaxRateReconciliationFormationOfEntity	0.00%dvn_EffectiveIncomeTaxRateReconciliationFormationOfEntity
Other	(1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	(19.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	(7.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate	58.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	113.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	(42.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations

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Effective income tax rate reconciliation, formation of entity.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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