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Derivative Financial Instruments (Schedule Of Open Oil Derivative Positions) (Details) | 9 Months Ended
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Sep. 30, 2014 bbl
NYMEX West Texas Intermediate Price Swaps Oil Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 75,000
Weighted Average Price Swap | 94.14
NYMEX West Texas Intermediate Price Collars Oil Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 64,750
Weighted Average Floor Price | 89.33
Weighted Average Ceiling Price | 100.00
NYMEX West Texas Intermediate Call Options Sold Oil Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 42,000
Weighted Average Call Option Sold Price | 116.43
NYMEX West Texas Intermediate Price Swaps Oil Q1 - Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 106,736
Weighted Average Price Swap | 91.22
NYMEX West Texas Intermediate Price Collars Oil Q1 - Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 31,500
Weighted Average Floor Price | 89.67
Weighted Average Ceiling Price | 97.84
NYMEX West Texas Intermediate Call Options Sold Oil Q1 - Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 28,000
Weighted Average Call Option Sold Price | 116.43
NYMEX West Texas Intermediate Call Options Sold Oil Q1 - Q4 2016 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 18,500
Weighted Average Call Option Sold Price | 103.11
Western Canadian Select Basis Swaps Oil Q4 2014 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 50,000
Weighted Average Differential To WTI | (17.40)
Western Canadian Select Basis Swaps Oil Q1 - Q4 2015 [Member] |
Derivatives, Fair Value [Line Items] |
Volume Per Day (Bbls/d) | 14,890
Weighted Average Differential To WTI | (18.92)

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- Definition Weighted Average Differential to W T I + References No definition available. + Details
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Namespace Prefix: | dvn_
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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_
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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
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Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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

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- 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