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QUARTERLY SALES AND EARNINGS DATA-UNAUDITED QUARTERLY SALES AND EARNINGS DATA-UNAUDITED (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Quarterly Financial Data [Abstract]                      
Sales $ 2,694 $ 2,720 $ 2,653 $ 2,409 $ 2,186 $ 2,122 $ 1,924 $ 2,241 $ 10,476 $ 8,473 $ 9,273
Gross Profit 559 662 681 598 526 501 371 577 2,500 1,975 2,234
Asset impairments and restructuring charges (gains), net 18 7 15 7 12 60 141 14 47 227 126
Net earnings attributable to Eastman $ 378 $ 351 $ (146) $ 274 $ 32 $ 161 $ 27 $ 258 $ 857 $ 478 $ 759
Earnings Per Share [Abstract]                      
Basic earnings per share attributable to Eastman $ 2.85 [1] $ 2.60 [1] $ (1.07) [1] $ 2.01 [1] $ 0.23 [1] $ 1.19 [1] $ 0.20 [1] $ 1.90 [1] $ 6.35 [2] $ 3.53 [2] $ 5.52 [2]
Diluted earnings per share attributable to Eastman $ 2.81 [1] $ 2.57 [1] $ (1.07) [1] $ 1.99 [1] $ 0.23 [1] $ 1.18 [1] $ 0.20 [1] $ 1.89 [1] $ 6.25 [2] $ 3.50 [2] $ 5.48 [2]
[1] Each quarter is calculated as a discrete period; the sum of the four quarters may not equal the calculated full year amount.
[2] EPS is calculated using whole dollars and shares.