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EARNINGS AND DIVIDENDS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 01, 2021
Earnings Per Share [Abstract]      
Net earnings attributable to Eastman $ 235 $ 274  
Weighted average shares used for basic EPS (in shares) 129,000,000.0 136,100,000  
Dilutive effect of stock options and other awards 1,700,000 1,500,000  
Weighted average shares used for diluted EPS (in shares) 130,700,000 137,600,000  
Earnings Per Share, Basic $ 1.82 $ 2.01  
Earnings Per Share, Diluted $ 1.80 $ 1.99  
Underlying options excluded from the computation of diluted earnings per share (in shares) 507,692 327,782  
Shares repurchased (in shares) 548,035 354,795  
Cash dividends declared (per share) $ 0.76 $ 0.69  
2021 Repurchase Program      
Earnings Per Share [Abstract]      
Stock Repurchase Program, Authorized Amount     $ 2,500
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Stock Repurchase Program, Authorized Amount     $ 2,500