v3.26.1
EARNINGS AND DIVIDENDS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Earnings Per Share [Abstract]    
Net earnings attributable to Eastman $ 107 $ 182
Weighted average shares used for basic EPS (in shares) 114,200,000 115,200,000
Dilutive effect of stock options and other awards 800,000 1,300,000
Weighted average shares used for diluted EPS (in shares) 115,000,000.0 116,500,000
Earnings Per Share, Basic $ 0.93 $ 1.58
Earnings Per Share, Diluted $ 0.93 $ 1.57
Underlying options excluded from the computation of diluted earnings per share (in shares) 4,051,375 1,716,564
Cash dividends declared (per share) $ 0.84 $ 0.83
Shares repurchased (in shares) 0 0