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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Entity Information [Line Items]    
Document Type 10-K  
Document Annual Report true  
Document Period End Date Dec. 31, 2019  
Document Transition Report false  
Entity File Number 1-12626  
Entity Registrant Name EASTMAN CHEMICAL CO  
Entity Incorporation, State or Country Code DE  
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  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Public Float   $ 10,531,152,394
Entity Common Stock, Shares Outstanding (in shares) 135,993,046  
Documents Incorporated by Reference
Portions of the registrant's definitive Proxy Statement for the 2020 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission, are incorporated by reference in Part III, Items 10 to 14 of this Annual Report on Form 10-K (this "Annual Report") as indicated herein.
  
Entity Central Index Key 0000915389  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus FY  
Common Stock [Member]    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol EMN  
Security Exchange Name NYSE  
1.50% notes due May 2023 [Member]    
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 [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 1.875% Notes Due 2026  
Trading Symbol EMN26  
Security Exchange Name NYSE