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Debt And Related Expenses (Schedule Of Other Debt And Debentures) (Details) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 13, 2014 | May 31, 2012 | Jul. 31, 2011 | Jan. 31, 2009 | Mar. 31, 2002 | Dec. 31, 2014 | Dec. 31, 2013
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Discount and issuance costs |  | $ (35,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts |  | $ (29,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts |  | $ (13,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts |  | $ (14,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts |  |
Net proceeds |  | 2,465,000,000 us-gaap_ProceedsFromUnsecuredNotesPayable |  | 2,221,000,000 us-gaap_ProceedsFromUnsecuredNotesPayable |  | 1,187,000,000 us-gaap_ProceedsFromUnsecuredNotesPayable |  | 986,000,000 us-gaap_ProceedsFromUnsecuredNotesPayable |  |
Early retirement of senior notes | 1,900,000,000 us-gaap_EarlyRepaymentOfSeniorDebt |  |  |  |  |  |  |  |  |
1.875% Due May 15, 2017 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of senior notes issued |  | 750,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_OnePointEightSevenFivePercentSeniorNotesDueMayFifteenthTwoThousandSeventeenMember | [1] |  |  |  |  |  |  |
3.25% Due May 15, 2022 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of senior notes issued |  | 1,000,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_ThreePointTwoFivePercentSeniorNoteDueMayFifteenthTwoThousandTwentyTwoMember |  |  |  |  |  |  |  |
4.75% Due May 15, 2042 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of senior notes issued |  | 750,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointSevenFivePercentSeniorNotesDueMayFifteenthTwoThousandFortyTwoMember |  |  |  |  |  |  |  |
2.40% due July 15, 2016 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  |  |  |  | 2.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember | 2.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember
Debt, maturity date |  |  |  |  |  |  |  |  | Jul. 15, 2016 | Jul. 15, 2016
Principal amount of senior notes issued |  |  |  | 500,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember | [1] |  |  |  |  |
Early retirement of senior notes |  |  |  |  |  |  |  |  | 500,000,000 us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember |
4.00% Due July 15, 2021 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  |  |  |  | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember
Debt, maturity date |  |  |  |  |  |  |  |  | Jul. 15, 2021 | Jul. 15, 2021
Principal amount of senior notes issued |  |  |  | 500,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember |  |  |  |  |  |
5.60% Due July 15, 2041 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of senior notes issued |  |  |  | 1,250,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentJulyFifteenthTwoThousandAndFortyOneMember |  |  |  |  |  |
5.625% due January 15, 2014 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  |  |  |  | 5.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixTwoFivePercentDueOnJanuaryFifteenthTwoThousandAndFourteenMember | 5.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixTwoFivePercentDueOnJanuaryFifteenthTwoThousandAndFourteenMember
Debt, maturity date |  |  |  |  |  |  |  |  | Jan. 15, 2014 | Jan. 15, 2014
Principal amount of senior notes issued |  |  |  |  |  | 500,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_FivePointSixTwoFivePercentDueOnJanuaryFifteenthTwoThousandAndFourteenMember | [2] |  |  |
6.30% Due January 15, 2019 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  |  |  |  | 6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember | 6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember
Debt, maturity date |  |  |  |  |  |  |  |  | Jan. 15, 2019 | Jan. 15, 2019
Principal amount of senior notes issued |  |  |  |  |  | 700,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember |  |  |  |
7.95% Due April 15, 2032 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of senior notes issued |  |  |  |  |  |  |  | $ 1,000,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointNineFivePercentAprilFifteenthTwoThousandAndThirtyTwoMember |  |
[1] | The 1.875% $750 million note due May 15, 2017 and 2.4% $500 million note due July 15, 2016 were redeemed on November 13, 2014.
[2] | The 5.625% $500 million note due January 15, 2014 was redeemed upon maturity.

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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized as well as the amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees). + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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