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Derivative Financial Instruments (Schedule Of Open Interest Rate Swap Derivative Positions) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2015 USD ($)
Interest Rate Contract 0.92% Expiration December 2016 [Member] |
Derivative [Line Items] |
Notional | $ 100
Rate Received | Three Month LIBOR
Rate Paid, percent | 0.92%
Expiration | Dec. 01, 2016
Interest Rate Contract 1.76% Expiration January 2019 [Member] |
Derivative [Line Items] |
Notional | $ 100
Rate Received, percent | 1.76%
Rate Paid | Three Month LIBOR
Expiration | Jan. 01, 2019
Interest Rate Contract 2.98% Expiration December 2048 [Member] |
Derivative [Line Items] |
Notional | $ 750
Rate Received | Three Month LIBOR
Rate Paid, percent | 2.98%
Expiration | Dec. 01, 2048

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- Definition Derivative, Description of Rate Received. + References No definition available. + Details
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Namespace Prefix: | dvn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Derivative rate received + References No definition available. + Details
Name: | dvn_DerivativeRateReceived
Namespace Prefix: | dvn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Derivative Variable Rate Paid. + References No definition available. + Details
Name: | dvn_DerivativeVariableRatePaid
Namespace Prefix: | dvn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Rate Paid Percent + References No definition available. + Details
Name: | dvn_RatePaidPercent
Namespace Prefix: | dvn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |