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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
	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

X

- 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

X

- 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

X

- 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

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeMaturityDates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration