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REVENUE RECOGNITION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net	$ 56		$ 56		$ 42
Income Statement [Abstract]
Sales	2,621	$ 2,419	5,228	$ 4,722
Cost of sales	1,917	1,789	3,943	3,487
Gross Profit	704	630	1,285	1,235
Earnings before interest and taxes	491	420	900	821
Net earnings attributable to Eastman	$ 344	$ 292	$ 634	$ 570
Basic earnings per share attributable to Eastman	$ 2.42	$ 2.01	$ 4.45	$ 3.91
Diluted earnings per share attributable to Eastman	$ 2.39	$ 2.00	$ 4.39	$ 3.89
Balance Sheet Related Disclosures [Abstract]
Trade receivables, net of allowance for doubtful accounts	$ 1,393		$ 1,393		1,026
Miscellaneous receivables	314		314		360
Inventories	1,532		1,532		1,509
Assets, Current	3,498		3,498		$ 3,143
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Income Statement [Abstract]
Sales	(5)		(35)
Cost of sales	(1)		(14)
Gross Profit	(4)		(21)
Earnings before interest and taxes	(4)		(21)
Net earnings attributable to Eastman	$ (2)		$ (16)
Basic earnings per share attributable to Eastman	$ (0.01)		$ (0.11)
Diluted earnings per share attributable to Eastman	$ (0.01)		$ (0.11)
Balance Sheet Related Disclosures [Abstract]
Trade receivables, net of allowance for doubtful accounts	$ (181)		$ (181)
Miscellaneous receivables	(41)		(41)
Inventories	140		140
Assets, Current	(82)		(82)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Additives And Functional Products [Member]
Income Statement [Abstract]
Sales	(9)		(6)
Earnings before interest and taxes	(6)		(9)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Advanced Materials [Member]
Income Statement [Abstract]
Sales	1		(19)
Earnings before interest and taxes	0		(10)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Chemical Intermediates [Member]
Income Statement [Abstract]
Sales	3		20
Earnings before interest and taxes	2		8
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Fibers [Member]
Income Statement [Abstract]
Sales	0		(30)
Earnings before interest and taxes	0		(10)
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	2,616		5,193
Cost of sales	1,916		3,929
Gross Profit	700		1,264
Earnings before interest and taxes	487		879
Net earnings attributable to Eastman	$ 342		$ 618
Basic earnings per share attributable to Eastman	$ 2.41		$ 4.34
Diluted earnings per share attributable to Eastman	$ 2.38		$ 4.28
Balance Sheet Related Disclosures [Abstract]
Trade receivables, net of allowance for doubtful accounts	$ 1,212		$ 1,212
Miscellaneous receivables	273		273
Inventories	1,672		1,672
Assets, Current	3,416		3,416
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Additives And Functional Products [Member]
Income Statement [Abstract]
Sales	933		1,875
Earnings before interest and taxes	186		359
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Advanced Materials [Member]
Income Statement [Abstract]
Sales	730		1,403
Earnings before interest and taxes	150		275
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Chemical Intermediates [Member]
Income Statement [Abstract]
Sales	712		1,459
Earnings before interest and taxes	87		163
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Fibers [Member]
Income Statement [Abstract]
Sales	241		456
Earnings before interest and taxes	83		116
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Corporate, Non-Segment [Member]
Income Statement [Abstract]
Earnings before interest and taxes	(19)		(34)
Operating Segments [Member]
Income Statement [Abstract]
Sales	2,621	$ 2,405	5,228	$ 4,695
Earnings before interest and taxes	510	437	934	845
Operating Segments [Member] | Additives And Functional Products [Member]
Income Statement [Abstract]
Sales	942	830	1,881	1,603
Earnings before interest and taxes	192	161	368	314
Operating Segments [Member] | Advanced Materials [Member]
Income Statement [Abstract]
Sales	729	657	1,422	1,291
Earnings before interest and taxes	150	137	285	258
Operating Segments [Member] | Chemical Intermediates [Member]
Income Statement [Abstract]
Sales	709	703	1,439	1,373
Earnings before interest and taxes	85	83	155	165
Operating Segments [Member] | Fibers [Member]
Income Statement [Abstract]
Sales	241	215	486	428
Earnings before interest and taxes	83	56	126	108
Corporate, Non-Segment [Member]
Income Statement [Abstract]
Sales	0	$ 14	0	$ 27
Earnings before interest and taxes	(19)		(34)
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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