v2.3.0.15

Short-Term Investments (Details)	9 Months Ended
	Sep. 30, 2011 days
Short-Term Investments
Average remaining maturity on short-term investments	97
Average yield on short-term investments	0.20%

X

- Definition

Average Days To Investment Maturity Date

+ Details

Name:	dvn_AverageDaysToInvestmentMaturityDate
Namespace Prefix:	dvn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The interest rate for investments that have an interest rate. For fixed rate investments, this indicates the fixed interest rate. If the investment has a variable interest rate, the rate stated here may be the rate that is currently relevant. In this case the "Investment, Interest Rate is Current Rate for Variable Rate Investment Flag", "Investment, Interest Rate is Discount Rate at Purchase Flag", "Investment, Interest Rate Reflects Current Yield Flag" should be used. If one of these flags are not appropriate to explain the interest rate that is indicated, then a new flag should be added or an explanation should be included in "Investment, Additional Information".

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

+ Details

Name:	invest_InvestmentInterestRate
Namespace Prefix:	invest
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ShortTermInvestmentsAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration