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EARNINGS AND DIVIDENDS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Net earnings attributable to Eastman $ 344 $ 292 $ 634 $ 570
Weighted average shares used for basic EPS (in shares) 141,900,000 145,300,000 142,300,000 145,700,000
Dilutive effect of stock options and other awards 2,100,000 1,100,000 2,100,000 1,100,000
Weighted average shares used for diluted EPS (in shares) 144,000,000 146,400,000 144,400,000 146,800,000
Earnings Per Share, Basic $ 2.42 $ 2.01 $ 4.45 $ 3.91
Earnings Per Share, Diluted $ 2.39 $ 2.00 $ 4.39 $ 3.89
Underlying options excluded from the computation of diluted earnings per share (in shares) 407,573 850,970 407,573 1,008,667
Shares repurchased (in shares) 1,415,539 1,232,977 2,409,774 2,176,676
Cash dividends declared (per share) $ 0.56 $ 0.51 $ 1.12 $ 1.02