Document And Entity Information - shares shares in Millions	9 Months Ended
	Sep. 30, 2017	Oct. 18, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Trading Symbol	DVN
Entity Registrant Name	DEVON ENERGY CORP/DE
Entity Central Index Key	0001090012
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2017
Entity Filer Category	Large Accelerated Filer
Document Fiscal Period Focus	Q3
Entity Common Stock, Shares Outstanding		525.5