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Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details)	9 Months Ended
	Sep. 30, 2014 MMBTU
FERC Henry Hub Price Swaps Natural Gas Q4 2014 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	800,000
Weighted Average Price Swap	4.42
FERC Henry Hub Price Collars Natural Gas Q4 2014 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	460,000
Weighted Average Floor Price	4.03
Weighted Average Ceiling Price	4.51
FERC Henry Hub Call Options Sold Natural Gas Q4 2014 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	500,000
Weighted Average Call Option Sold Price	5.00
FERC Henry Hub Price Swaps Natural Gas Q1- Q4 2015 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	210,000
Weighted Average Price Swap	4.38
FERC Henry Hub Price Collars Natural Gas Q1- Q4 2015 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	260,000
Weighted Average Floor Price	4.05
Weighted Average Ceiling Price	4.36
FERC Henry Hub Call Options Sold Natural Gas Q1- Q4 2015 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	550,000
Weighted Average Call Option Sold Price	5.09
FERC Henry Hub Call Options Sold Natural Gas Q1- Q4 2016 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	400,000
Weighted Average Call Option Sold Price	5.00
AECO Basis Swaps Natural Gas Q4 2014 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	94,781
Weighted Average Differential To Henry Hub	(0.52)
PEPL Basis Swaps Natural Gas Q1 - Q4 2015 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (MMBtu/d)	100,000
Weighted Average Differential To Henry Hub	(0.28)

X

- Definition

Weighted Average Differential To Henry Hub

+ References

No definition available.

+ Details

Name:	dvn_WeightedAverageDifferentialToHenryHub
Namespace Prefix:	dvn_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

X

- 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_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- 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

X

- 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

Name:	us-gaap_DerivativeAveragePriceRiskOptionStrikePrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- 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