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Leases (Schedule of Expected Lease Income ) (Parenthetical) (Details) $ in Millions	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating lease income for leases not yet commenced	$ 30

X

- Definition

Amount of lease payments to be received by lessor for operating leases not yet commenced.

+ References

No definition available.

+ Details

Name:	dvn_LessorOperatingLeasePaymentsToBeReceivedForLeasesNotYetCommenced
Namespace Prefix:	dvn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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