v3.26.1
EARNINGS AND DIVIDENDS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share [Abstract]        
Net earnings attributable to Eastman $ 183 $ 140 $ 290 $ 322
Weighted average shares used for basic EPS (in shares) 114,300,000 115,000,000.0 114,200,000 115,100,000
Dilutive effect of stock options and other awards 1,000,000.0 1,200,000 1,000,000.0 1,300,000
Weighted average shares used for diluted EPS (in shares) 115,300,000 116,200,000 115,200,000 116,400,000
Earnings Per Share, Basic $ 1.60 $ 1.22 $ 2.54 $ 2.80
Earnings Per Share, Diluted $ 1.59 $ 1.20 $ 2.51 $ 2.77
Underlying options excluded from the computation of diluted earnings per share (in shares) 3,987,014 3,264,994 4,038,459 1,772,176
Cash dividends declared (per share) $ 0.84 $ 0.83 $ 1.68 $ 1.66
Shares repurchased (in shares) 0 643,791 0 643,791