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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies [Abstract]
Obligation related to the purchase of condensate, year of expiration	2021
Total rental expense, including certain office space and equipment under operating lease agreements, net of sub-lease income	$ 64us-gaap_LeaseAndRentalExpense	$ 26us-gaap_LeaseAndRentalExpense	$ 42us-gaap_LeaseAndRentalExpense

X

- Definition

Purchase Obligations Related To Purchase Of Condensate In Years.

+ References

No definition available.

+ Details

Name:	dvn_PurchaseObligationsRelatedToPurchaseOfCondensateInYears
Namespace Prefix:	dvn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration