| Cover Page | Oct. 29, 2020 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2020 |
| Entity Registrant Name | EASTMAN CHEMICAL CO |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-12626 |
| Entity Tax Identification Number | 62-1539359 |
| Entity Address, Address Line One | 200 South Wilcox Drive |
| Entity Address, City or Town | Kingsport |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 37662 |
| City Area Code | 423 |
| Local Phone Number | 229-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000915389 |
| Amendment Flag | false |
| Common Stock | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | EMN |
| Security Exchange Name | NYSE |
| Notes Due 2023 | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 1.50% Notes Due 2023 |
| Trading Symbol | EMN23 |
| Security Exchange Name | NYSE |
| 1.875% notes due November 2026 | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 1.875% Notes Due 2026 |
| Trading Symbol | EMN26 |
| Security Exchange Name | NYSE |
