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Supplemental Information On Oil And Gas Operations (Proved Total MMBoe Reserves) (Details) | 12 Months Ended |
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Dec. 31, 2014 MMBoe Mcf | Dec. 31, 2013 MMBoe | Dec. 31, 2012 MMBoe | Dec. 31, 2011 MMBoe
Reserve Quantities [Line Items] |  |  |  |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance (MMBoe) | 2,963 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy | [1] | 2,963 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy | [1] | 3,005 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy | [1] |  |
Proved developed and undeveloped reserves, revisions due to prices (MMboe) | 9 dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy | [1] | 94 dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy | [1] | (171)dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy | [1] |  |
Proved developed and undeveloped reserves, revisions other than price (MMBoe) | (65)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy | [1] | (88)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy | [1] | (68)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy | [1] |  |
Proved developed and undeveloped reserves, extension and discoveries (MMBoe) | 211 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy | [1] | 261 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy | [1] | 449 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy | [1] |  |
Proved developed and undeveloped reserves, purchase of reserves (MMboe) | 265 us-gaap_ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy | [1] | 1 us-gaap_ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy | [1] |  |  |  |
Proved developed and undeveloped reserves, production (MMBoe) | (246)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy | [1] | (253)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy | [1] | (250)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy | [1] |  |
Proved developed and undeveloped reserves, sale of reserves (MMBoe) | (383)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy | [1] | (15)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy | [1] | (2)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy | [1] |  |
Proved developed and undeveloped reserves, ending balance (MMBoe) | 2,754 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy | [1] | 2,963 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy | [1] | 2,963 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy | [1] |  |
Proved developed reserves (MMBoe) | 2,065 us-gaap_ProvedDevelopedReservesBOE1 | [1] | 2,262 us-gaap_ProvedDevelopedReservesBOE1 | [1] | 2,123 us-gaap_ProvedDevelopedReservesBOE1 | [1] | 2,223 us-gaap_ProvedDevelopedReservesBOE1 | [1]
Proved developed producing reserves (MMBoe) | 1,977 dvn_ProvedDevelopedProducingReservesEnergy | [1] | 2,154 dvn_ProvedDevelopedProducingReservesEnergy | [1] | 2,021 dvn_ProvedDevelopedProducingReservesEnergy | [1] | 2,069 dvn_ProvedDevelopedProducingReservesEnergy | [1]
Proved undeveloped reserve (MMBoe) | 689 us-gaap_ProvedUndevelopedReserveBOE1 | [1] | 701 us-gaap_ProvedUndevelopedReserveBOE1 | [1] | 840 us-gaap_ProvedUndevelopedReserveBOE1 | [1] | 782 us-gaap_ProvedUndevelopedReserveBOE1 | [1]
Conversion rate of gas reserves from barrels of oil to Boe | 6 dvn_ConversionRateOfGasReservesFromMcfToBoe |  |  |  |  |  |  |
United States [Member] |  |  |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance (MMBoe) | 2,205 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 2,236 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 2,278 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |
Proved developed and undeveloped reserves, revisions due to prices (MMboe) | 38 dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 76 dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | (159)dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |
Proved developed and undeveloped reserves, revisions other than price (MMBoe) | (86)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | (117)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | (67)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |
Proved developed and undeveloped reserves, extension and discoveries (MMBoe) | 197 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 212 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 367 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |
Proved developed and undeveloped reserves, purchase of reserves (MMboe) | 265 us-gaap_ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 1 us-gaap_ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |  |  |
Proved developed and undeveloped reserves, production (MMBoe) | (207)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | (189)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | (183)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |
Proved developed and undeveloped reserves, sale of reserves (MMBoe) | (207)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | (14)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |  |  |
Proved developed and undeveloped reserves, ending balance (MMBoe) | 2,205 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 2,205 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 2,236 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] |  |
Proved developed reserves (MMBoe) | 1,900 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1] | 1,947 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1] | 1,829 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1] | 1,875 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1]
Proved developed producing reserves (MMBoe) | 1,815 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 1,857 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 1,743 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1] | 1,746 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_US | [1]
Proved undeveloped reserve (MMBoe) | 305 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1] | 258 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1] | 407 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1] | 403 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_US | [1]
Canada [Member] |  |  |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance (MMBoe) | 758 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 727 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 727 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed and undeveloped reserves, revisions due to prices (MMboe) | (29)dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 18 dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | (12)dvn_ProvedDevelopedAndUndevelopedReservesRevisionsDueToPricesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed and undeveloped reserves, revisions other than price (MMBoe) | 21 us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 29 us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | (1)us-gaap_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed and undeveloped reserves, extension and discoveries (MMBoe) | 14 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 49 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 82 us-gaap_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed and undeveloped reserves, production (MMBoe) | (39)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | (64)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | (67)us-gaap_ProvedDevelopedAndUndevelopedReserveProductionEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed and undeveloped reserves, sale of reserves (MMBoe) | (176)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | (1)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | (2)us-gaap_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed and undeveloped reserves, ending balance (MMBoe) | 549 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 758 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 727 us-gaap_ProvedDevelopedAndUndevelopedReserveNetEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] |  |
Proved developed reserves (MMBoe) | 165 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1] | 315 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1] | 294 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1] | 348 us-gaap_ProvedDevelopedReservesBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1]
Proved developed producing reserves (MMBoe) | 162 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 297 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 278 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1] | 323 dvn_ProvedDevelopedProducingReservesEnergy / us-gaap_StatementGeographicalAxis = country_CA | [1]
Proved undeveloped reserve (MMBoe) | 384 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1] | 443 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1] | 433 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1] | 379 us-gaap_ProvedUndevelopedReserveBOE1 / us-gaap_StatementGeographicalAxis = country_CA | [1]
[1] | Gas reserves are converted to Boe at the rate of six Mcf per Bbl of oil, based upon the approximate relative energy content of gas and oil. This rate is not necessarily indicative of the relationship of natural gas and oil prices. Bitumen and natural gas liquids reserves are converted to Boe on a one-to-one basis with oil.

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- Definition Energy measure of increase in quantity of proved reserve of oil and gas resulting from the extension of the proved acreage of previously discovered reservoir or discovery of new field with proved reserve or of new reservoir of proved reserve in old field, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Energy measure of proved reserve of oil and gas, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Energy measure of decrease in quantity of proved reserve of oil and gas resulting from production, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Energy measure of increase in quantity of proved reserve of oil and gas resulting from purchase of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Energy measure of decrease in quantity of proved reserve of oil and gas resulting from sale of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Energy measure of interests in proved developed reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas. + References No definition available. + Details
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- Definition Energy measure of proved undeveloped reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas. + References No definition available. + Details
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