Document And Entity Information - shares shares in Millions	3 Months Ended
	Mar. 31, 2020	Apr. 22, 2020
Cover [Abstract]
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
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	2020
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Document Fiscal Period Focus	Q1
Entity Common Stock, Shares Outstanding		382.7
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-32318
Entity Tax Identification Number	73-1567067
Entity Address, Address Line One	333 West Sheridan Avenue
Entity Address, City or Town	Oklahoma City
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73102-5015
City Area Code	405
Local Phone Number	235-3611
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $0.10 per share
Security Exchange Name	NYSE
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false