EARNINGS PER SHARE CALCULATIONS (Earnings Per Share Calculation - Basic) (Details) - $ / shares		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income attributable to The Dow Chemical Company, basic		$ 1.09	$ 2.88	$ 1.83	$ 3.13
Preferred stock dividends, basic	[1]	(0.00)	(0.07)	(0.00)	(0.15)
Net income attributable to participating securities	[2]	(0.01)	(0.02)	(0.01)	(0.02)
Net income attributable to common stockholders, basic		$ 1.08	$ 2.79	$ 1.82	$ 2.96

[1] On December 30, 2016, the Company converted its outstanding shares of Cumulative Convertible Perpetual Preferred Stock, Series A ("Preferred Stock") into shares of the Company's common stock. As a result of this conversion, no shares of Preferred Stock are issued or outstanding.

[2] Deferred stock awards are considered participating securities due to Dow's practice of paying dividend equivalents on unvested shares.