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Restructuring Costs (Schedule Of The Activity And Balances Associated With Restructuring Liabilities) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  |  | $ 61 us-gaap_RestructuringReserve
Ending balance | 20 us-gaap_RestructuringReserve | 45 us-gaap_RestructuringReserve | 61 us-gaap_RestructuringReserve
Other Current Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  |  | 52 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember
Ending balance | 13 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember | 27 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember | 52 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember
Other Long-Term Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  |  | 9 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember
Ending balance | 7 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember | 18 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember | 9 us-gaap_RestructuringReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember
Canadian Divestitures [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | 4 us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_RestructuringPlanAxis = dvn_CanadaDivestitureMember |  |
Canadian Divestitures [Member] | Other Current Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | 4 us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_CanadaDivestitureMember |  |
Office Consolidation [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | (25)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_RestructuringPlanAxis = dvn_OfficeConsolidationMember | (11)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_RestructuringPlanAxis = dvn_OfficeConsolidationMember |
Office Consolidation [Member] | Other Current Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | (15)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OfficeConsolidationMember | (22)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OfficeConsolidationMember |
Office Consolidation [Member] | Other Long-Term Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | (10)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OfficeConsolidationMember | 11 us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OfficeConsolidationMember |
Offshore Divestiture [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | (4)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_RestructuringPlanAxis = dvn_OffshoreDivestitureMember | (5)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_RestructuringPlanAxis = dvn_OffshoreDivestitureMember |
Offshore Divestiture [Member] | Other Current Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | (3)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OffshoreDivestitureMember | (3)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OffshoreDivestitureMember |
Offshore Divestiture [Member] | Other Long-Term Liabilities [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve activity | $ (1)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OffshoreDivestitureMember | $ (2)us-gaap_RestructuringReservePeriodIncreaseDecrease / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember / us-gaap_RestructuringPlanAxis = dvn_OffshoreDivestitureMember |

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Net total Increase or Decrease in the accrual for restructuring costs during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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