STOCKHOLDERS' EQUITY (Merger with DuPont) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2017
Class of Stock [Line Items]
Merger impact	$ 0
Dow
Class of Stock [Line Items]
Dow to DowDuPont Share Exchange Ratio for Common Shares			1
Treasury Stock
Class of Stock [Line Items]
Merger impact	$ (935)
Treasury Stock | Dow
Class of Stock [Line Items]
Conversion to DowDuPont shares or canceled on Aug 31, 2017	0	0
Common Stock
Class of Stock [Line Items]
Merger impact	$ (3,107)
Common Stock | Dow
Class of Stock [Line Items]
Conversion to DowDuPont shares or canceled on Aug 31, 2017	(1,242,795)	0
Additional Paid-in Capital
Class of Stock [Line Items]
Merger impact	$ (2,172)