| Document and Entity Information | Oct. 29, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | DEVON ENERGY CORP/DE |
| Entity Incorporation State Country Code | DE |
| Entity Address, State or Province | OK |
| Amendment Flag | false |
| Entity Central Index Key | 0001090012 |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2020 |
| Entity File Number | 001-32318 |
| Entity Tax Identification Number | 73-1567067 |
| Entity Address, Address Line One | 333 W. SHERIDAN AVE. |
| Entity Address, City or Town | OKLAHOMA CITY |
| Entity Address, Postal Zip Code | 73102-5015 |
| City Area Code | (405) |
| Local Phone Number | 235-3611 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.10 per share |
| Trading Symbol | DVN |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
