STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - Common Stock (Details) - $ / shares	6 Months Ended
	Jun. 30, 2019	Apr. 01, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, authorized (in shares)	5,000,000,000		100
Common Stock, Shares, Issued	749,025,762		100
Dow Inc. [Member]
Class of Stock [Line Items]
Stock Repurchased During Period, Shares	5,813,756
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, authorized (in shares)	5,000,000,000		100
Common Stock, Shares, Issued	749,025,762	748,771,240	100
Treasury Stock, Common, Shares	5,813,756		0
Conversion of Stock, Shares Issued	748,771,140
Stock Issued During Period, Shares, New Issues	254,522
The Dow Chemical Company [Domain]
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, authorized (in shares)	100		100
Common Stock, Shares, Issued	100		100