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REVENUE RECOGNITION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net	$ 67		$ 67		$ 42
Income Statement [Abstract]
Sales	2,547	$ 2,465	7,775	$ 7,187
Cost of sales	1,819	1,794	5,762	5,281
Gross Profit	728	671	2,013	1,906
Earnings before interest and taxes	517	464	1,417	1,285
Net earnings attributable to Eastman	$ 412	$ 323	$ 1,046	$ 893
Basic earnings per share attributable to Eastman	$ 2.93	$ 2.24	$ 7.38	$ 6.15
Diluted earnings per share attributable to Eastman	$ 2.89	$ 2.22	$ 7.28	$ 6.10
Balance Sheet Related Disclosures [Abstract]
Trade receivables, net of allowance for doubtful accounts	$ 1,404		$ 1,404		1,026
Miscellaneous receivables	368		368		360
Inventories	1,625		1,625		1,509
Total current assets	3,647		3,647		$ 3,143
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Income Statement [Abstract]
Sales	(19)		(54)
Cost of sales	(15)		(29)
Gross Profit	(4)		(25)
Earnings before interest and taxes	(4)		(25)
Net earnings attributable to Eastman	$ (3)		$ (21)
Basic earnings per share attributable to Eastman	$ (0.02)		$ (0.15)
Diluted earnings per share attributable to Eastman	$ (0.02)		$ (0.14)
Balance Sheet Related Disclosures [Abstract]
Trade receivables, net of allowance for doubtful accounts	$ (191)		$ (191)
Miscellaneous receivables	(50)		(50)
Inventories	154		154
Total current assets	(87)		(87)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Additives And Functional Products [Member]
Income Statement [Abstract]
Sales	(1)		(7)
Earnings before interest and taxes	2		(7)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Advanced Materials [Member]
Income Statement [Abstract]
Sales	(11)		(30)
Earnings before interest and taxes	(4)		(14)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Chemical Intermediates [Member]
Income Statement [Abstract]
Sales	(13)		7
Earnings before interest and taxes	(1)		7
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Fibers [Member]
Income Statement [Abstract]
Sales	6		(24)
Earnings before interest and taxes	(1)		(11)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Corporate, Non-Segment [Member]
Income Statement [Abstract]
Earnings before interest and taxes	0		0
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Income Statement [Abstract]
Sales	2,528		7,721
Cost of sales	1,804		5,733
Gross Profit	724		1,988
Earnings before interest and taxes	513		1,392
Net earnings attributable to Eastman	$ 409		$ 1,025
Basic earnings per share attributable to Eastman	$ 2.91		$ 7.23
Diluted earnings per share attributable to Eastman	$ 2.87		$ 7.14
Balance Sheet Related Disclosures [Abstract]
Trade receivables, net of allowance for doubtful accounts	$ 1,213		$ 1,213
Miscellaneous receivables	318		318
Inventories	1,779		1,779
Total current assets	3,560		3,560
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Additives And Functional Products [Member]
Income Statement [Abstract]
Sales	914		2,789
Earnings before interest and taxes	188		547
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Advanced Materials [Member]
Income Statement [Abstract]
Sales	698		2,101
Earnings before interest and taxes	149		424
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Chemical Intermediates [Member]
Income Statement [Abstract]
Sales	690		2,149
Earnings before interest and taxes	108		271
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Fibers [Member]
Income Statement [Abstract]
Sales	226		682
Earnings before interest and taxes	83		199
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Corporate, Non-Segment [Member]
Income Statement [Abstract]
Earnings before interest and taxes	(15)		(49)
Operating Segments [Member]
Income Statement [Abstract]
Sales	2,547	$ 2,452	7,775	$ 7,147
Earnings before interest and taxes	532	480	1,466	1,325
Operating Segments [Member] | Additives And Functional Products [Member]
Income Statement [Abstract]
Sales	915	886	2,796	2,489
Earnings before interest and taxes	186	189	554	503
Operating Segments [Member] | Advanced Materials [Member]
Income Statement [Abstract]
Sales	709	646	2,131	1,937
Earnings before interest and taxes	153	142	438	400
Operating Segments [Member] | Chemical Intermediates [Member]
Income Statement [Abstract]
Sales	703	696	2,142	2,069
Earnings before interest and taxes	109	81	264	246
Operating Segments [Member] | Fibers [Member]
Income Statement [Abstract]
Sales	220	224	706	652
Earnings before interest and taxes	84	68	210	176
Corporate, Non-Segment [Member]
Income Statement [Abstract]
Sales	0	$ 13	0	$ 40
Earnings before interest and taxes	(15)		(49)
Corporate, Non-Segment [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Income Statement [Abstract]
Sales	0		0
Corporate, Non-Segment [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Income Statement [Abstract]
Sales	$ 0		$ 0

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