EARNINGS PER SHARE CALCULATIONS (Earnings Per Share Calculation - Diluted) (Details) - $ / shares		3 Months Ended			9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to The Dow Chemical Company, diluted		$ 0.71		$ 1.10	$ 3.50	$ 3.26
Preferred stock dividends, diluted		(0.08)	[1]	(0.00)	(0.00)	(0.00)
Net income attributable to participating securities, diluted	[2]	(0.00)		(0.01)	(0.02)	(0.02)
Earnings per common share - diluted		$ 0.63		$ 1.09	$ 3.48	$ 3.24

[1] Preferred stock dividends were not added back in the calculation of diluted earnings per share for the three months ended September 30, 2016, because the effect of adding them back would have been antidilutive.

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