Derivative Financial Instruments (Schedule Of Open Oil Derivative Positions) (Details)	3 Months Ended
Mar. 31, 2020 $ / bbl bbl
NYMEX West Texas Intermediate Price Swaps Oil Q2-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	82,207
Weighted Average Price Swap	36.87
NYMEX West Texas Intermediate Price Swaps Oil Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	11,649
Weighted Average Price Swap	36.77
NYMEX West Texas Intermediate Price Collars Oil Q2-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	50,449
Weighted Average Floor Price	51.11
Weighted Average Ceiling Price	61.14
NYMEX West Texas Intermediate Price Collars Oil Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	15,964
Weighted Average Floor Price	41.24
Weighted Average Ceiling Price	51.24
Argus MEH Basis Swaps Oil Q2-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	50,916
Weighted Average Differential To WTI	0.45
Midland Sweet Basis Swaps Oil Q2-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	31,782
Weighted Average Differential To WTI	(1.23)
NYMEX Roll Basis Swaps Oil Q2-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	52,676
Weighted Average Differential To WTI	0.38
Midland Sweet Basis Swaps Oil Q1-Q4 2021 [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	7,000
Weighted Average Differential To WTI	1.27

Weighted average differential to W T I.

No definition available.

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- 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

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- 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

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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

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

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Data Type:	srt-types:perUnitItemType
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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dvn_NYMEXWestTexasIntermediatePriceSwapsOilQ2Q42020Member
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- Details

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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dvn_NYMEXWestTexasIntermediatePriceCollarsOilQ2Q42020Member
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- Details

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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dvn_ArgusMEHBasisSwapsOilQ2Q42020Member
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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dvn_MidlandSweetBasisSwapsOilQ2Q42020Member
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- Details

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- Details

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