Document And Entity Information In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Apr. 22, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	Mar. 31, 2015
Amendment Flag	false
Entity Registrant Name	DEVON ENERGY CORP/DE
Entity Central Index Key	0001090012
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2015
Entity Filer Category	Large Accelerated Filer
Document Fiscal Period Focus	Q1
Entity Common Stock, Shares Outstanding		411.1