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Commitments And Contingencies (Narrative) (Details)	6 Months Ended
	Jun. 30, 2020 Defendant
Parishes in Louisiana [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Number of defendants	100

X

- 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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Balance Type:	na
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X

- Definition

Number of defendants named in a legal action.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_StatementGeographicalAxis=dvn_ParishesInLouisianaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
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Period Type: