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Supplemental Information To Cash Flows (Schedule Of Supplemental To Cash Flow Information) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 07, 2014
Net change in working capital accounts:
Accounts receivable	$ 128us-gaap_IncreaseDecreaseInAccountsReceivable	$ (288)us-gaap_IncreaseDecreaseInAccountsReceivable	$ 140us-gaap_IncreaseDecreaseInAccountsReceivable
Income taxes receivable	(467)us-gaap_IncreaseDecreaseInIncomeTaxesReceivable	29us-gaap_IncreaseDecreaseInIncomeTaxesReceivable	(55)us-gaap_IncreaseDecreaseInIncomeTaxesReceivable
Other current assets	(222)us-gaap_IncreaseDecreaseInOtherCurrentAssets	20us-gaap_IncreaseDecreaseInOtherCurrentAssets	(73)us-gaap_IncreaseDecreaseInOtherCurrentAssets
Accounts payable	(68)us-gaap_IncreaseDecreaseInAccountsPayableTrade	26us-gaap_IncreaseDecreaseInAccountsPayableTrade	(8)us-gaap_IncreaseDecreaseInAccountsPayableTrade
Revenues and royalties payable	133us-gaap_IncreaseDecreaseInRoyaltiesPayable	35us-gaap_IncreaseDecreaseInRoyaltiesPayable	19us-gaap_IncreaseDecreaseInRoyaltiesPayable
Other current liabilities	546us-gaap_IncreaseDecreaseInOtherCurrentLiabilities	(120)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities	(73)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Net change in working capital	50us-gaap_IncreaseDecreaseInOperatingCapital	(298)us-gaap_IncreaseDecreaseInOperatingCapital	(50)us-gaap_IncreaseDecreaseInOperatingCapital
Interest paid (net of capitalized interest)	514us-gaap_InterestPaidNet	406us-gaap_InterestPaidNet	334us-gaap_InterestPaidNet
Income taxes paid (received)	899us-gaap_IncomeTaxesPaidNet	13us-gaap_IncomeTaxesPaidNet	100us-gaap_IncomeTaxesPaidNet
General Partner And Enlink [Member]
Net change in working capital accounts:
Cash payment to acquire interest				$ 100us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndEnlinkMember

X

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

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X

- Definition

Change in recurring obligations of a business that arise from the acquisition of merchandise, materials, supplies and services used in the production and sale of goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-Section 45

-Paragraph 28

-Subparagraph (a)

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X

- Definition

The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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- Definition

The increase (decrease) during the reporting period in income taxes receivable, which represents the amount due from tax authorities for refunds of overpayments or recoveries of income taxes paid.

+ References

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- Definition

The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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The increase (decrease) during the reporting period in other current operating assets not separately disclosed in the statement of cash flows.

+ References

No definition available.

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- Definition

The increase (decrease) during the reporting period in other current operating liabilities not separately disclosed in the statement of cash flows.

+ References

No definition available.

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X

- Definition

The increase (decrease) during the reporting period in the obligations due for compensation payments related to the use of copyrights, patents, trade names, licenses, technology. Royalty payments are also paid by the lease holders for oil, gas, and mineral extraction.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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