v2.3.0.15

Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Minimum [Member]
Mark-to-market threshold above which collateral must be posted	$ 0
Maximum [Member]
Mark-to-market threshold above which collateral must be posted	$ 55

X

- Definition

Mark-to-Market Exposure Threshold

+ Details

Name:	dvn_MarkToMarketExposureThreshold
Namespace Prefix:	dvn
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration