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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, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Quarterly Financial Data [Abstract]                      
Sales $ 2,376 $ 2,547 $ 2,621 $ 2,607 $ 2,362 $ 2,465 $ 2,419 $ 2,303 $ 10,151 $ 9,549 $ 9,008
Gross Profit 466 728 704 581 457 671 630 605 2,479 2,363 2,357
Asset impairments and restructuring charges (gains), net 39 0 4 2 8 0 0 0 45 8 45
Net earnings attributable to Eastman $ 34 $ 412 $ 344 $ 290 $ 491 $ 323 $ 292 $ 278 $ 1,080 $ 1,384 $ 854
Earnings Per Share [Abstract]                      
Basic earnings per share attributable to Eastman $ 0.25 [1] $ 2.93 [1] $ 2.42 [1] $ 2.03 [1] $ 3.42 [1] $ 2.24 [1] $ 2.01 [1] $ 1.90 [1] $ 7.65 [2] $ 9.56 [2] $ 5.80 [2]
Diluted earnings per share attributable to Eastman $ 0.24 [1] $ 2.89 [1] $ 2.39 [1] $ 2.00 [1] $ 3.39 [1] $ 2.22 [1] $ 2.00 [1] $ 1.89 [1] $ 7.56 [2] $ 9.47 [2] $ 5.75 [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] Earnings per share are calculated using whole dollars and shares.