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Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details) | 9 Months Ended
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Sep. 30, 2014 MMBTU
FERC Henry Hub Price Swaps Natural Gas Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 800,000
Weighted Average Price Swap | 4.42
FERC Henry Hub Price Collars Natural Gas Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 460,000
Weighted Average Floor Price | 4.03
Weighted Average Ceiling Price | 4.51
FERC Henry Hub Call Options Sold Natural Gas Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 500,000
Weighted Average Call Option Sold Price | 5.00
FERC Henry Hub Price Swaps Natural Gas Q1- Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 210,000
Weighted Average Price Swap | 4.38
FERC Henry Hub Price Collars Natural Gas Q1- Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 260,000
Weighted Average Floor Price | 4.05
Weighted Average Ceiling Price | 4.36
FERC Henry Hub Call Options Sold Natural Gas Q1- Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 550,000
Weighted Average Call Option Sold Price | 5.09
FERC Henry Hub Call Options Sold Natural Gas Q1- Q4 2016 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 400,000
Weighted Average Call Option Sold Price | 5.00
AECO Basis Swaps Natural Gas Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 94,781
Weighted Average Differential To Henry Hub | (0.52)
PEPL Basis Swaps Natural Gas Q1 - Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (MMBtu/d) | 100,000
Weighted Average Differential To Henry Hub | (0.28)

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- Definition Weighted Average Differential To Henry Hub + References No definition available. + Details
Name: | dvn_WeightedAverageDifferentialToHenryHub
Namespace Prefix: | dvn_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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- Definition The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. + References No definition available. + Details
Name: | us-gaap_DerivativeAverageCapPrice
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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- Definition The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract. + References No definition available. + Details
Name: | us-gaap_DerivativeAverageFloorPrice
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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- Definition The average strike price on the group of price risk option contracts such as put options or call options. + References No definition available. + Details
Name: | us-gaap_DerivativeAveragePriceRiskOptionStrikePrice
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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- Definition Nominal energy measure used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix: | us-gaap_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Average fixed price related to the group of price risk swap derivatives. + References No definition available. + Details
Name: | us-gaap_DerivativeSwapTypeAverageFixedPrice
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant