EARNINGS PER SHARE CALCULATIONS (Earnings Per Share Calculation - Diluted) (Details) - $ / shares		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income attributable to The Dow Chemical Company, diluted		$ 1.10	$ 0.79		$ 3.26	$ 2.47
Preferred stock dividends, diluted		(0.00)	(0.07)	[1]	(0.00)	(0.21)	[1]
Net income attributable to participating securities, diluted	[2]	(0.01)	(0.01)		(0.02)	(0.02)
Earnings per common share - diluted		$ 1.09	$ 0.71		$ 3.24	$ 2.24

[1] Preferred stock dividends were not added back in the calculation of diluted earnings per share for the three- and nine-month periods ended September 30, 2014, 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.