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Derivative Financial Instruments (Schedule Of Open Interest Rate Swap Derivative Positions) (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended
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Sep. 30, 2014
Interest Rate Contract Expiration December 2016 [Member] |
Derivative [Line Items] |
Notional | $ 100
Rate Received | Three Month LIBOR
Rate Paid | 0.92%
Expiration | Dec. 01, 2016
Interest Rate Contract Expiration January 2019 [Member] |
Derivative [Line Items] |
Notional | $ 100
Rate Received | 1.76%
Rate Paid | Three Month LIBOR
Expiration | Jan. 01, 2019

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

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- Details
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Namespace Prefix: | us-gaap_
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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_
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Period Type: | duration