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Debt And Related Expenses (Schedule Of Debt For GeoSouthern Acquisition) (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 |  |  |  |  |  |  |
Floating Rate due December 15, 2015 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt, maturity date |  |  |  |  |  | Dec. 15, 2015 |  | Dec. 15, 2015
Floating Rate Due December 15, 2016 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt, maturity date |  |  |  |  |  | Dec. 15, 2016 |  | Dec. 15, 2016
1.20% Due December 15, 2016 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  | 1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember |  | 1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
Debt, maturity date |  |  |  |  |  | Dec. 15, 2016 |  | Dec. 15, 2016
Early retirement of senior notes |  |  |  |  |  | 650,000,000 us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember |  |
2.25% Due December 15, 2018 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  | 2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember |  | 2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
Debt, maturity date |  |  |  |  |  | Dec. 15, 2018 |  | Dec. 15, 2018
GeoSouthern Intermediate Holdings, LLC [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Discount and issuance costs |  |  |  |  |  | (2,000,000)dvn_DebtInstrumentUnamortizedDiscountAndIssuanceCosts / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember |  |
Net proceeds |  |  |  |  |  | 2,248,000,000 us-gaap_ProceedsFromUnsecuredNotesPayable / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember |  |
GeoSouthern Intermediate Holdings, LLC [Member] | Floating Rate due December 15, 2015 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt, maturity date |  |  |  |  |  | Dec. 15, 2015 |  |
Principal amount of senior notes issued |  |  |  |  |  | 500,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandFifteenMember |  |
GeoSouthern Intermediate Holdings, LLC [Member] | Floating Rate Due December 15, 2016 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt, maturity date |  |  |  |  |  | Dec. 15, 2016 |  |
Principal amount of senior notes issued |  |  |  |  |  | 350,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandSixteenMember |  |
GeoSouthern Intermediate Holdings, LLC [Member] | 1.20% Due December 15, 2016 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  | 1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember |  |
Debt, maturity date |  |  |  |  |  | Dec. 15, 2016 |  |
Principal amount of senior notes issued |  |  |  |  |  | 650,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember | [1] |
GeoSouthern Intermediate Holdings, LLC [Member] | 2.25% Due December 15, 2018 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt interest rate, stated percentage |  |  |  |  |  | 2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember |  |
Debt, maturity date |  |  |  |  |  | Dec. 15, 2018 |  |
Principal amount of senior notes issued |  |  |  |  |  | 750,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember |  |
[1] | The 1.20% $650 million note due December 15, 2016 was redeemed on November 13, 2014.

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