GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule of Amortization Expense of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization Expense			$ 622	$ 624	$ 544
DowDuPont Cost Synergy Program
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 69
In-process research and development (IPR&D) | DowDuPont Cost Synergy Program
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 11
In-process research and development (IPR&D) | 2016 Restructuring
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 11
Other intangible assets, excluding software
Finite-Lived Intangible Assets [Line Items]
Amortization Expense			622	624	544
Software, included in “Cost of sales”
Finite-Lived Intangible Assets [Line Items]
Amortization Expense			$ 100	$ 87	$ 73