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EARNINGS AND DIVIDENDS PER SHARE (Tables)
6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Earnings per share, basic and diluted The following table sets forth the computation of basic and diluted earnings per share ("EPS") which are calculated using the treasury stock method:
 Second QuarterFirst Six Months
(In millions, except per share amounts)2023202220232022
Numerator
Earnings attributable to Eastman, net of tax $272 $256 $406 $491 
Denominator
Weighted average shares used for basic EPS118.8124.8118.9126.9
Dilutive effect of stock options and other awards0.81.60.71.7
Weighted average shares used for diluted EPS119.6126.4119.6128.6
(Calculated using whole dollars and shares)
EPS
Basic$2.28 $2.05 $3.41 $3.87 
Diluted$2.27 $2.03 $3.39 $3.82